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2016

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Exploring Leader-Initiated Change Management For Adopting Cloud Services, Nancy Marie Landreville Jan 2016

Exploring Leader-Initiated Change Management For Adopting Cloud Services, Nancy Marie Landreville

Walden Dissertations and Doctoral Studies

Cloud technology requires a virtualized ubiquitous and scalable environment with shared resources. The general problem in cloud adoption is the absence of standardization across organizations. A standardized approach remained elusive since the inception of the Cloud First mandate. The purpose of this study was to explore leader-initiated change management (LICM) practices in cloud adoption within organizations. The theoretical framework included the classical theories of Kurt Lewin's organization change management, leader-member exchange, intentional change, and appreciative inquiry. A multiple case study design approach facilitated the exploration of LICM-value added practices to identify standardization in cloud adoption practices. Data collection included semistructured …

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Innovation Difussion Of Smartphone In Nigeria, Olukunle Ariyo Iyanda Jan 2016

Innovation Difussion Of Smartphone In Nigeria, Olukunle Ariyo Iyanda

Walden Dissertations and Doctoral Studies

Rapid diffusion and use of smartphones in Africa are challenging, given the state of its infrastructural facilities. The problem addressed was a lack of information on the adoption behavior and the sociodevelopmental effect of smartphone acceptance among rural and urban users in Nigeria. The purpose of this study was to examine the adoption behavior and the sociodevelopmental effect of smartphone acceptance among rural and urban residents. Research questions examined the relationship of performance expectancy, social influence, price value, and habit on adopters' intentions to use smartphones, continued use of smartphones, and the sociodevelopmental effect on smartphone users lives and standard …

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Exploring Maintenance And Facility Operations Strategies For California Community Colleges, Virginia Parras Grande Jan 2016

Exploring Maintenance And Facility Operations Strategies For California Community Colleges, Virginia Parras Grande

Walden Dissertations and Doctoral Studies

California community college leaders are looking for strategies to sustain facilities and maintenance operations because the governor only approved the allocation of $87.5 million in the 2014-2015 Budget Act for facilities maintenance operations. Guided by the change and strategy theories, the purpose of this multicase study was to explore the strategies that a select group of college leaders have used to sustain or improve their facilities maintenance operations. The data collection process included a review of college planning documents and semistructured interviews with 10 senior administrators from 3 large California community colleges who have used strategies to address sustaining or …

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Factors That Impact African American High School Equivalency (Hse) Students' Pursuit Of Higher Education, Jamiyla Chandler-Melton Jan 2016

Factors That Impact African American High School Equivalency (Hse) Students' Pursuit Of Higher Education, Jamiyla Chandler-Melton

Walden Dissertations and Doctoral Studies

African Americans account for a disproportionate percentage of students who pursue college education in comparison to European Americans. Indeed, a considerable number of African American High School Equivalency (HSE) students are not enrolling in college once they earn their HSE diploma. The purpose of this qualitative case study was to examine 3 African American HSE students' perceptions about factors that influenced their pursuit of higher education at the selected HSE study site. These 3 students were selected for their inclusion because of their ethnicity, enrollment in the HSE program, academic underpreparedness and lack of pursuit of higher education, and strong …

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A Case Study Of Middle Schools Teachers' Perceptions Of The Use Of Classroom Websites, Deborah Mau Jan 2016

A Case Study Of Middle Schools Teachers' Perceptions Of The Use Of Classroom Websites, Deborah Mau

Walden Dissertations and Doctoral Studies

Research has confirmed the benefits of incorporating technology, such as course websites, within public school classrooms to enhance student learning. However, many teachers do not incorporate technology or class websites. The purpose of this case study was to investigate technology integration within classroom websites to enhance student learning. Guided by the theory of constructivism, the concerns-based adoption model, and the technological pedagogical content knowledge framework, the research questions focused on teachers' perceptions of how a classroom website influences teaching practices and the key benefits of technology integration. Data were collected from 12 certified teachers in 2 middle schools who were …

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A Comparison Of Marketing Techniques Among Military Recruiters, Paul Vincent Mccullough Iii Jan 2016

A Comparison Of Marketing Techniques Among Military Recruiters, Paul Vincent Mccullough Iii

Walden Dissertations and Doctoral Studies

The U.S. Department of Defense spent $11 billion in enlistment and retention bonuses from 2006 to 2010, which had only a marginally positive effect on the enlistment rate for the Army. The case study addressed this business problem of recruiting by exploring marketing strategies successful recruiting professionals used to motivate individuals to join the military. The purpose of this study was to determine effective recruiting strategies. Therefore, it incorporated the conceptual framework of emergent strategy theory, which postulated the best strategies are neither completely planned nor completely random, but are rather an adaptation to changing dynamics and circumstances. The population …

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Ability And Performance Comparisons Of Gifted Students In Homogeneous And Heterogeneous Settings, Cindy Rochelle Schwartz Jan 2016

Ability And Performance Comparisons Of Gifted Students In Homogeneous And Heterogeneous Settings, Cindy Rochelle Schwartz

Walden Dissertations and Doctoral Studies

To meet the educational needs and acceleration of talented and gifted (TAG) students, it is important to determine the best learning environment to afford optimal academic success during their educational experience. A study at a Bartow County school district in Georgia has been conducted in order to establish this best learning environment. This study investigated if Lexile scores (ability) and academic averages (performance) differ for 6th grade TAG students in homogeneous classes compared to TAG students in heterogeneous settings. Vygotsky's theory of social constructivism, which proposes that students need to feel socially and cognitively supported by their environment, was the …

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The Impact Of A New Teacher Support System On Teacher Efficacy, Tonja Denise Simpson Jan 2016

The Impact Of A New Teacher Support System On Teacher Efficacy, Tonja Denise Simpson

Walden Dissertations and Doctoral Studies

Retaining novice teachers is a major concern for school districts across the United States. At an urban high school in a Southeastern state, over 30% of novice teachers hired over a 3-year period did not return after their first year of teaching. The purpose of the study was to examine novice teachers' perceptions of support received during their first year to determine how school-based support could increase novice teacher retention. The theoretical framework was Bandura's theory of self-efficacy and the concept of teacher efficacy espoused by Tschannen-Moran, Woolfolk-Hoy, and Hoy. The research questions focused on the perceptions of novice teachers …

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"The Relationship Between Test Anxiety And Standardized Test Scores", Beth Ann Fulton Jan 2016

"The Relationship Between Test Anxiety And Standardized Test Scores", Beth Ann Fulton

Walden Dissertations and Doctoral Studies

The number of standardized achievement tests that students in the United States are required to take has increased significantly during the past decade. Researchers have found that test anxiety is often a problem related to the increase in testing. This correlational study investigated the relationship between anxiety levels of 50 4th grade students and their standardized test scores. Test anxiety questionnaires and pulse rates were used as a measure of the anxiety level of each of the 4th grade students just before the standardized test was administered, and standardized test scores were used as a measure of academic performance. The …

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Electronic Warfare Receiver Resource Management And Optimization, William Metz Jan 2016

Electronic Warfare Receiver Resource Management And Optimization, William Metz

Walden Dissertations and Doctoral Studies

Optimization of electronic warfare (EW) receiver scan strategies is critical to improving the probability of surviving military missions in hostile environments. The problem is that the limited understanding of how dynamic variations in radar and EW receiver characteristics has influenced the response time to detect enemy threats. The dependent variable was the EW receiver response time and the 4 independent variables were EW receiver revisit interval, EW receiver dwell time, radar scan time, and radar illumination time. Previous researchers have not explained how dynamic variations of independent variables affected response time. The purpose of this experimental study was to develop …

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The Experiences Of Grade 4 Public Elementary School Teachers Regarding Multiculturalism, James Hill Hill Jan 2016

The Experiences Of Grade 4 Public Elementary School Teachers Regarding Multiculturalism, James Hill Hill

Walden Dissertations and Doctoral Studies

An increasing number of multicultural students are attending U.S. public schools. At a Title I elementary school in a rural region of the southern United States, multicultural students had not met academic standards as measured by state exams, and state scores had been very low for 5 consecutive years. The purpose of this qualitative case study was to understand the instructional strategies used by Grade 4 teachers in helping multicultural students pass state tests. The conceptual framework was Vygotsky's theory of cognitive and social constructivism and Gardner's theory of multiple intelligences. The foci of research questions were on identifying teachers' …

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Strategies For Successful Implementation Of Change Initiatives In Health Care, Kristy Trinidad Jan 2016

Strategies For Successful Implementation Of Change Initiatives In Health Care, Kristy Trinidad

Walden Dissertations and Doctoral Studies

Changing regulations, increased competition, and evolving customers' expectations have necessitated significant organizational changes in the health care industry. This multiple case study investigated the strategies of senior managers from 3 California health care organizations to implement significant change initiatives. The participating organizations had a positive reputation for successfully implementing change. Data from interviews and a review of organizational documents were analyzed through the conceptual lens of Lewin's phases of change model and Kotter's 8-step process for implementing change. The analysis revealed 3 general themes: communications, training, and employee involvement. The managers of each participating organization emphasized the importance of keeping …

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Examining Barriers That Inhibit Student Achievement From A Teacher's Perspective, Taryn Everett Jan 2016

Examining Barriers That Inhibit Student Achievement From A Teacher's Perspective, Taryn Everett

Walden Dissertations and Doctoral Studies

Teachers at an urban high school in the Southeast have failed to see an increase in classroom achievement or standardized test scores despite efforts to increase passing rates. If achievement rates do not increase, school restructuring will occur. While the site has implemented programs to reduce academic failure, data exists that external barriers may be affecting student achievement. Guided by Bandura's (1986) theory of metacognitive beliefs and self-efficacy as the conceptual framework, this qualitative case study explored teachers' perceptions about the root causes of poor student achievement. This study examines how to identify those causes to help students improve academically, …

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Leadership Strategies For Retaining Healthcare Professionals, Kimberly Hulett Jan 2016

Leadership Strategies For Retaining Healthcare Professionals, Kimberly Hulett

Walden Dissertations and Doctoral Studies

Obtaining information about employee engagement and retention practices is vital for organizations. Affective organizational commitment reflects the extent to which organizational members are loyal and willing to work toward organizational objectives. In particular, affective organizational commitment holds important implications at all organizational levels (e.g., turnover rates, performance, and citizenship behavior). Using general systems theory and transformational leadership theory, the purpose of this single case study was to explore strategies used to improve employee engagement and retention from 5 senior leaders with hiring responsibilities from a midsize hospital in Austin, Texas that have been successful with employee engagement and retention strategies. …

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Preschool Teachers' Attitudes And Beliefs Toward Science, Sharon Henry Lloyd Jan 2016

Preschool Teachers' Attitudes And Beliefs Toward Science, Sharon Henry Lloyd

Walden Dissertations and Doctoral Studies

In the United States, a current initiative, Advancing Active STEM Education for Our Youngest Learners, aims to advance science, technology, engineering, and math (STEM) education in early childhood. The purpose of this study was to understand preschool teachers' proficiency with science and address the problem of whether or not science learning opportunities are provided to young children based on teachers' attitudes and beliefs. A theoretical framework for establishing teachers' attitudes toward science developed by van Aalderen-Smeets, van der Molen, and Asma, along with Bandura's theory of self-efficacy were the foundations for this research. Research questions explored preschool teachers' attitudes and …

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Managing To Clear The Air: Stereotype Threat, Women, And Leadership, Crystal L. Hoyt, Susan E. Murphy Jan 2016

Managing To Clear The Air: Stereotype Threat, Women, And Leadership, Crystal L. Hoyt, Susan E. Murphy

Jepson School of Leadership Studies articles, book chapters and other publications

In this article, we explore the process and implications of stereotype threat for women in leadership, broadly construed. First, we provide a brief background on the phenomenon of stereotype threat generally. Next, we explore stereotype threat for women in leadership by reviewing a model of stereotype threat in leadership contexts that includes cues to stereotype threat, consequences of stereotype threat, and moderators of stereotype threat appraisals and responses. In this review, in addition to considering research focused squarely on leadership, we include the broader categories of research examining stereotype threat effects in the workplace and in tasks and domains relevant …

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Social Stereotyping And Self-Esteem Of Miss America Pageant Contestants, Ebony Bowers Jan 2016

Social Stereotyping And Self-Esteem Of Miss America Pageant Contestants, Ebony Bowers

Walden Dissertations and Doctoral Studies

Miss America Pageant contestants (MAPCs) have been negatively stereotyped socially for their perceived lack of intelligence and nonconformance to feminist gender stereotypes of women. Stereotypes could affect an individual's social psyche and establish stigma, which could prevent a group from achieving their full potential. Stereotypes could also result in women having mental health disorders, low self-esteem, a decrease in self-efficacy, body image dissatisfaction, and eating disorders. The problem this study addressed was that women who participate in the Miss America Organization (MAO) preliminary pageants risk social stigma for taking part in a seemingly nonfeminist activity. Intercultural communication research (ICR) was …

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Critical Thinking To Justify An Answer In Mathematics Classrooms, Angelique E. Brown Jan 2016

Critical Thinking To Justify An Answer In Mathematics Classrooms, Angelique E. Brown

Walden Dissertations and Doctoral Studies

Students' critical thinking in mathematics was a concern for grade 5 through 8 teachers at a Title 1 public school in the northeastern United States because of the students' poor performance on constructed response questions on the state's mathematics exam. In this exam, students were required to justify their answers in writing. When teachers recognize the connection between writing and critical thinking, they can devise strategies to help students develop mathematical literacy. The purpose of this qualitative case study was to explore how 5th through 8th grade mathematics teachers use the GoMath mathematics literacy program to teach the critical thinking …

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A Qualitative Phenomenological Study Of Employee Perceptions Of The Impact Of Layoffs, Linda Carrington Jan 2016

A Qualitative Phenomenological Study Of Employee Perceptions Of The Impact Of Layoffs, Linda Carrington

Walden Dissertations and Doctoral Studies

Millions of Americans were terminated from their employment in massive layoffs in 2013, which not only created outrage among employees. but also opened the door for retaliatory lawsuits. However, profitable companies are still engaged in restructuring and layoffs, which have a negative effect on employees, managers, and survivors. Such actions create mistrust in management and continue to plague the workforce and the economy. The purpose of this phenomenological study was to explore the impacts that layoffs and downsizing have on employees' trust, work performance, behavior, and health. Informed by Sarker's theory on management and employee trust, the research questions explored …

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Women Entrepreneurs: Keys To Successful Business Development And Sustainability Beyond Five Years, Delores Duncan Foster Jan 2016

Women Entrepreneurs: Keys To Successful Business Development And Sustainability Beyond Five Years, Delores Duncan Foster

Walden Dissertations and Doctoral Studies

Women-owned businesses are one of the fastest growing entrepreneurial populations, accounting for 8 million of the 28 million small businesses in the United States. Small businesses fail at a rate of 55% by the 5th year of operation and women, who own over 30% of all small businesses, contribute significantly to the 55% small business failure rate. Using Schumpeter's framework, this single exploratory case study investigated how women entrepreneurial small business owners use strategies to sustain their business operation beyond 5 years. A purposeful sample identified 2 women salon small business owners located in the Macon, Georgia metro area. Data …

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Small Aviation Business Success Strategies For Profitability, Christina Hiers Jan 2016

Small Aviation Business Success Strategies For Profitability, Christina Hiers

Walden Dissertations and Doctoral Studies

Ninety-five percent of all aviation businesses are small businesses; from 2009-2012, small aviation business operations decreased by 10.2% and resulted in a loss of $4.4 billion in revenue. The purpose for this multiunit case study was to explore what strategies small aviation businesses leaders used to reduce or control operating expenses for profitability. The sample comprised 3 small aviation businesses located in Middle Tennessee. The conceptual framework for this study built upon systems theory and sustainability theory. The data were collected through semistructured interviews and company documents. Member checking was completed to strengthen creditability and trustworthiness. Based on the methodological …

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Health Science Adminstrators' Perception Of Remediation With Students In The Professional Track Programs, Yvonne Jackson Jackson Jan 2016

Health Science Adminstrators' Perception Of Remediation With Students In The Professional Track Programs, Yvonne Jackson Jackson

Walden Dissertations and Doctoral Studies

Remediation to improve student retention is rapidly becoming an important part of health science programs in higher education. A career college located in the midwestern United States implemented remediation for students to address declining enrollment health science professional-track programs. The purpose of this qualitative case study was to explore how remediation was carried out by college instructors and their perceptions of instructional best practices for students in health science programs in the context of current research. The conceptual framework that guided this study was based on constructivism and adult learning theory. Research questions focused on how instructors were carrying out …

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Electrochemistry-Coupled To Mass Spectrometry In Simulation Of Metabolic Oxidation Of Methimazole: Identification And Characterization Of Metabolites, Kudzanai Chipiso, Reuben H. Simoyi Jan 2016

Electrochemistry-Coupled To Mass Spectrometry In Simulation Of Metabolic Oxidation Of Methimazole: Identification And Characterization Of Metabolites, Kudzanai Chipiso, Reuben H. Simoyi

Chemistry Faculty Publications and Presentations

Methimazole (MMI), an antithyroid drug, is associated with idiosyncratic toxicity. Reactive metabolites resulting from bioactivation of the drug have been implicated in these adverse drug reactions. Mimicry of enzymatic oxidation of MMI was carried out by electrochemically oxidizing MMI using a coulometric flow-through cell equipped with a porous graphite working electrode. The cell was coupled on-line to electrospray ionization mass spectrometry (EC/ESI-MS). ESI spectra were acquired in both negative and positive modes. In acidic medium, ESI spectral analysis showed that the dimer was the main product, while in neutral and basic media, methimazole sulfenic acid, methimazole sulfinic acid and methimazole …

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Synthesis And Evaluation Of A Novel N--P-Containing Oil-Based Fire-Retardant Plasticizer For Poly(Vinyl Chloride), Pu-You Jia, Guo-Dong Feng, Yun Hu, Yong-Hong Zhou Jan 2016

Synthesis And Evaluation Of A Novel N--P-Containing Oil-Based Fire-Retardant Plasticizer For Poly(Vinyl Chloride), Pu-You Jia, Guo-Dong Feng, Yun Hu, Yong-Hong Zhou

Turkish Journal of Chemistry

A novel N--P-containing soybean-oil-based fire-retardant plasticizer was synthesized using soybean oil methyl ester, 9,10-dihydro-9-oxa-phosphaphenanthrene-10-oxide (DOPO), and tris(2-hydroxyethyl) isocyanurate (THEIC). The structure was verified by Fourier transform infrared (FTIR) spectrometry and nuclear magnetic resonance (NMR) spectroscopy. The blends were characterized by thermogravimetric analysis (TGA), FTIR spectrometry, scanning electron microscopy (SEM), and dynamic mechanical analysis (DMA). TGA showed that the thermal stability of the blends were acceptable. DMA indicated that the plasticizer had good plasticity for PVC. The limiting oxygen index (LOI) of the blends ranged from 21.3 to 29.6. The flammability and thermal stability of PVC/THEIC-DOPO-ESOME was better than that of …

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Adsorptive Features Of Polyacrylamide--Aluminosilicate Composites For Methylene Blue, Demet Baybaş, Ulvi̇ Ulusoy Jan 2016

Adsorptive Features Of Polyacrylamide--Aluminosilicate Composites For Methylene Blue, Demet Baybaş, Ulvi̇ Ulusoy

Turkish Journal of Chemistry

Polyacrylamide--montmorillonite (PAAm-Mt) and polyacrylamide--clinoptilolite (PAAm-Z) composites were prepared by cross-linked polymerization of acrylamide in dispersions of Mt and Z. The composites were characterized by FT-IR, SEM, XRD, CEC, and PZC analysis. The adsorptive features of PAAm-Mt and PAAm-Z for methylene blue (MB) were investigated by their relevance to initial dye concentration, temperature, contact time, PZC, and pH. The monolayer adsorption capacities were 0.14 and 0.08 mol kg$^{-1}$ for PAAm-Z and PAAm-Mt, respectively. The changes in pH of MB solution had an insignificant influence on their adsorption capacities. The values of enthalpy and entropy changes were positive ($\Delta $H$_{PAAm-Mt}$ = 7.6 …

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Square Wave Voltammetric Determination Of Valproic Acid In Pharmaceutical Preparations, Ebru Türköz Acar, Ati̇ye Nur Onar Jan 2016

Square Wave Voltammetric Determination Of Valproic Acid In Pharmaceutical Preparations, Ebru Türköz Acar, Ati̇ye Nur Onar

Turkish Journal of Chemistry

The electrochemical behavior of valproic acid (VAL) was investigated using square wave voltammetry, cyclic voltammetry, and sampled direct current polarography and a new square wave voltammetric method was developed for determination of VAL in pharmaceutical preparations. VAL showed two reduction peaks at about --0.2 V and --0.8 V vs. Ag/AgCl 3 M KCl with a hanging mercury drop electrode in 0.05 M pH 3.3 Britton--Robinson (BR) buffer. These peaks were named peak I and peak II, respectively. The types of limiting current of both peaks were determined as diffusion controlled based on cyclic voltammetry studies. A linear calibration graph was …

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Purification And Characterization Of Mitochondrial Thioredoxin Reductase Enzyme From Rainbow Trout (Oncorhynchus Mykiss) Liver And Investigation Of The In Vitro Effects Of Some Metal Ions On The Enzyme, İlknur Özgençli̇, Mehmet Çi̇ftci̇ Jan 2016

Purification And Characterization Of Mitochondrial Thioredoxin Reductase Enzyme From Rainbow Trout (Oncorhynchus Mykiss) Liver And Investigation Of The In Vitro Effects Of Some Metal Ions On The Enzyme, İlknur Özgençli̇, Mehmet Çi̇ftci̇

Turkish Journal of Chemistry

Thioredoxin reductase (E.C 1.6.4.5.; TrxR) is an enzyme belonging to the flavoprotein family of pyridine nucleotide-disulfide oxidoreductases. In this study, mitochondrial TrxR enzyme was purified from rainbow trout mitochondria. Thanks to the 2 consecutive procedures (preparation of homogenate and 2',5'-ADP Sepharose 4B affinity chromatography), the enzyme, having the specific activity of 11.9 EU mg protein-1, was purified with a yield of 2.38{\%} and 672-fold. The purity of the enzyme was monitored and the molecular weight of its subunits was calculated as 70 kDa by SDS-PAGE. The native molecular mass of the enzyme was found to be approximately 151 kDa by …

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Synthesis And Structural Properties Of $N$-3,4-(Dichlorophenyl)-3-Oxo-3- Phenyl-2-(Phenylcarbonyl)Propanamide And Its Cu(Ii) Complex, Ahmet Oral Sarioğlu, Tuğba Taşkin Tok, Mehmet Akkurt, Muhammad Nawaz Tahir, Mehmet Sönmez Jan 2016

Synthesis And Structural Properties Of $N$-3,4-(Dichlorophenyl)-3-Oxo-3- Phenyl-2-(Phenylcarbonyl)Propanamide And Its Cu(Ii) Complex, Ahmet Oral Sarioğlu, Tuğba Taşkin Tok, Mehmet Akkurt, Muhammad Nawaz Tahir, Mehmet Sönmez

Turkish Journal of Chemistry

A new N-carboxamide compound (3) was synthesized by the reaction of dibenzoylaceticacid-$N$-carboxyethyla\-mide (1) and 3,4-dichloroaniline (2). The $N$-(3,4-dichlorophenyl)-3-oxo-3-phenyl-2-(phenylcarbonyl) propanamide (3) subsequently reacted with Cu salt to produce its Cu(II) complex compound (4). The compounds were characterized by analytical and spectral methods. In addition, X-ray diffraction was performed to characterize and obtain detailed information about the structure of 3. The fully optimized geometries of compounds 3 and 4 were calculated at different basis sets by using the Gaussian09 (G09) software to investigate their 3D geometries and electronic structures. Comparisons between the calculated and experimental data including molecular structures, fundamental vibrational modes, …

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Systematic Optimization Of Chemical Deposition Conditions For Synthesis Of Vanadium(V) Oxide Xerogels, Aksu Samet, Metodija Najdoski, Igor Kuzmanovski Jan 2016

Systematic Optimization Of Chemical Deposition Conditions For Synthesis Of Vanadium(V) Oxide Xerogels, Aksu Samet, Metodija Najdoski, Igor Kuzmanovski

Turkish Journal of Chemistry

We performed the optimization of conditions in chemical bath deposition using the design of experimental methodology. Factorial design (2$^{3})$ was used for finding the optimal conditions of preparing vanadium(V) oxide xerogel thin films with better electrochromic properties suitable for electrochemical applications. The thin films were prepared by acidification of NH$_{4}$VO$_{3}$ aqueous solution with chemical bath deposition. The factors and selected values we considered were as follows: the deposition time (10 and 20 min), the deposition temperature (70 and 80 $^{\circ}$C), and the mass of ammonium metavanadate (0.3 and 0.5 g). UV-vis spectrometry was used for recording the transmittance variance, $\Delta …

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Liquid State $^{15}$N Nmr Studies Of $^{15}$N Isotope Labeled Phthalocyanines, Armağan Atsay, Ahmet Gül, Makbule Koçak Jan 2016

Liquid State $^{15}$N Nmr Studies Of $^{15}$N Isotope Labeled Phthalocyanines, Armağan Atsay, Ahmet Gül, Makbule Koçak

Turkish Journal of Chemistry

$^{15}$N labeled soluble metallo- and metal-free phthalocyanines are described for the first time. The complexes were synthesized starting from phthalic anhydride derivatives using 98{\%} $^{15}$N enriched urea. The effects of the substitution pattern, aggregation, and coordinated metal on $^{15}$N chemical shifts in liquid state NMR were studied.

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