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2019

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Evaluation Of The Enrichment And Amplification Effect Of Pentachlorobenzene With Lower Bioconcentration In The Food Chain Before And After Modification, Ruihao Sun, Meijin Du, Yu Li Jan 2019

Evaluation Of The Enrichment And Amplification Effect Of Pentachlorobenzene With Lower Bioconcentration In The Food Chain Before And After Modification, Ruihao Sun, Meijin Du, Yu Li

Turkish Journal of Chemistry

In this paper, in order to construct a 3D quantitative structure--activity relationship (QSAR) model with the chlorobenzene (CB) molecular structure parameter as an independent variable and the octanol-water partition coefficient ($K_{OW})$ as a dependent variable, 9 kinds of CB molecules were used as training sets and 3 kinds of CB molecules were used as test sets. We adopted the QSAR module in the Sybyl-X2.0 software from the Tripos Corporation (USA). The molecular modification of the pentachlorobenzene molecule with low bioconcentration was carried out by combining a three-dimensional contour map and fractional factorial design. The results showed that the toxicity, migration, …

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The Solvatochromism And Electronic Structure Of (E)-2-(2-Hydroxystyryl)Quinolin-8-Ol, Ayşegül Gümüş, Yadi̇gar Gülseven Sidir, İsa Sidir, Selçuk Gümüş Jan 2019

The Solvatochromism And Electronic Structure Of (E)-2-(2-Hydroxystyryl)Quinolin-8-Ol, Ayşegül Gümüş, Yadi̇gar Gülseven Sidir, İsa Sidir, Selçuk Gümüş

Turkish Journal of Chemistry

The (E)-2-(2-hydroxystyryl)quinolin-8-ol (abbreviated as HSQ) molecule was synthesized and characterized. The ESIPT, solvatochromism properties, electronic structure, and ground and excited electric dipole moments of this molecule were measured using absorption and fluorescence spectra recorded in 13 different solvents. Its electronic structure via electronic transitions was investigated to find the quantitative values of solvatochromism properties by LSER calculations. The ESIPT mechanism was clarified; ground and excited dipole moments were determined using solvatochromic shift methods. The DFT (B3LYP)/6-311$++$G(d,p) method and basis set with potential energy surface (PES) calculations of proton transfer were used to explain the ESIPT mechanism. NBO analysis, NLO properties, …

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Design, Synthesis, And Antitumor Evaluation Of Novel Methylene Moiety-Tethered Tetrahydroquinoline Derivatives, Esaam Hamied Ahmed Hanashalshahaby, Canan Ünaleroğlu, Ayşe Ak Can, Alp Özgün, Bora Gari̇pcan Jan 2019

Design, Synthesis, And Antitumor Evaluation Of Novel Methylene Moiety-Tethered Tetrahydroquinoline Derivatives, Esaam Hamied Ahmed Hanashalshahaby, Canan Ünaleroğlu, Ayşe Ak Can, Alp Özgün, Bora Gari̇pcan

Turkish Journal of Chemistry

Novel methylene-tethered tetrahydroquinolines (THQs) and cyclopenta[$b$]pyridines were synthesized by one-pot multicomponent reactions of Mannich bases, enolizable ketones, and NH$_{4}$OAc in water by an environmentally friendly K-10 montmorillonite clay-catalyzed reaction. The cytotoxic activities of 1-(2-methyl-8-methylene-5,6,7,8-tetrahydroquinolin-3-yl)ethanone (9a), ethyl 2-methyl-8-methylene-5,6,7,8-tetrahydroquinoline-3 carboxylate (9b), and 1-(2-methyl-7-methylene-6,7-dihydro-5$H$-cyclopenta[$b$]pyridin-3-yl)ethanone (11a) were tested against rat glioblastoma (C6), human breast cancer (MCF-7), prostate cancer (PC3), neuroblastoma (SH-SY5Y), and mouse fibroblast (L929) cell lines in a concentration-dependent (50-300 μM) and time-dependent (24-72 h) manner and expressed as IC$_{50\, }$values. The results showed that compound 9a induced the lowest IC$_{50\, }$values in all cell lines ranging from 111 ± 1.1 μM to …

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Synthesis And Catalytic Activity Of Ionic Palladium \Textit{N}-Heterocyclic Carbene Complexes, Sedat Yaşar, Mi̇tat Akkoç, Namik Özdemi̇r, İsmai̇l Özdemi̇r Jan 2019

Synthesis And Catalytic Activity Of Ionic Palladium \Textit{N}-Heterocyclic Carbene Complexes, Sedat Yaşar, Mi̇tat Akkoç, Namik Özdemi̇r, İsmai̇l Özdemi̇r

Turkish Journal of Chemistry

The synthesis of 3 benzimidazole-based ionic Pd(II)-NHC complexes (NHC:$N$-heterocyclic carbene) is presented. The structures of the complexes are as follows: [NHC-PdBr$_{3}$]$^{-}$[NHC]$^{+}$. The ionic palladium(II)-NHC complexes were synthesized in high yields and were fully characterized by nuclear magnetic resonance spectroscopy, X-ray diffraction, LC-MS/MS, and elemental analysis. These complexes have been identified as active catalysts in Suzuki-Miyaura reactions in a solution of 2-propanol and water at room temperature for different aryl bromides.

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Aqueous Two-Phase Extraction Technique Based On Magnetic Ionic Liquid-Nonionic Surfactant For Phenolic Acids In Grape, Apple, Pear, And Banana, Taşkin Mumcu, Serap Seyhan Bozkurt Jan 2019

Aqueous Two-Phase Extraction Technique Based On Magnetic Ionic Liquid-Nonionic Surfactant For Phenolic Acids In Grape, Apple, Pear, And Banana, Taşkin Mumcu, Serap Seyhan Bozkurt

Turkish Journal of Chemistry

An aqueous two-phase extraction system was constituted using magnetic ionic liquid-nonionic surfactant for phenolic acids and the developed method was applied to apple, grape, pear, and banana samples. Ionic liquids based on imidazolium containing butyl, allyl, and benzyl groups were used for extraction. The parameters influencing the extraction efficiency such as volume of ionic liquids, type and amount of surfactant and salt, ultrasound extraction time, temperature, and sample pH were optimized. The extraction efficiencies of ionic liquids were compared for phenolic acids under optimized conditions. Limits of detection and limits of quantification were in the range of 1.34-1.56 μg L$^{-1\, …

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Surface Modification Of Polyvinyl Chloride By Polyacrylic Acid Graftas A Polyelectrolyte Membrane Using Ar Plasma, Alaa Fahmy, Mouhamed Abu-Saied, Nasser Morgan, Walid Qutop, Hassan Abdelbary, Tarek Salama Jan 2019

Surface Modification Of Polyvinyl Chloride By Polyacrylic Acid Graftas A Polyelectrolyte Membrane Using Ar Plasma, Alaa Fahmy, Mouhamed Abu-Saied, Nasser Morgan, Walid Qutop, Hassan Abdelbary, Tarek Salama

Turkish Journal of Chemistry

This work reports the synthesis and properties of a new membrane based on polyvinyl chloride (PVC) grafting with polyacrylic acid (PAA) using argon (Ar) plasma. The membranes of PVC were synthesized by solution-casting method, where PAA was deposited as an ultrathin film onto PVC using dielectric barrier discharge at atmospheric pressure with Ar gas. The surface characteristics and chemical composition of the modified membranes were analyzed by water contact angle, scanning electron microscopy, and Fourier transform infrared spectroscopy. Moreover, the electrochemical properties of the membrane were investigated via ion exchange capacity for the purpose of using it as a polyelectrolyte …

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Next Steps For Training And Education In Professional Psychology: Advancing The Science And Expanding Our Reach, Debora J. Bell, Jennifer L. Callahan, Georita M. Frierson, Theodore R. Burnes, Susan Lynn Crowley, Stephen R. Mccutcheon Jan 2019

Next Steps For Training And Education In Professional Psychology: Advancing The Science And Expanding Our Reach, Debora J. Bell, Jennifer L. Callahan, Georita M. Frierson, Theodore R. Burnes, Susan Lynn Crowley, Stephen R. Mccutcheon

Psychology Faculty Publications

As TEPP’s new editorial team begins their term, the authors discuss their vision for the journal as a forum for thoughtful conceptual examination and sound empirical investigation of current issues in health service psychology (HSP) education and training. The editorial team articulates three primary goals for the journal, including (1) engaging the broad training community in sharing its best conceptual and empirical work relevant to the varied levels, settings, and areas of education and training in HSP; (2) advancing the science of education and training through strong empirical research; and (3) expanding our emphasis on the sociocultural context in which …

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Evaluating The Open And Engaged Components Of Acceptance And Commitment Therapy In An Online Self-Guided Website: Results From A Pilot Trial, Julie M. Petersen, Jennifer Krafft, Michael P. Twohig, Michael E. Levin Jan 2019

Evaluating The Open And Engaged Components Of Acceptance And Commitment Therapy In An Online Self-Guided Website: Results From A Pilot Trial, Julie M. Petersen, Jennifer Krafft, Michael P. Twohig, Michael E. Levin

Psychology Faculty Publications

Online acceptance and commitment therapy (ACT) is promising for treating a range of psychological problems. Component research can further clarify which components are needed for optimal outcomes in what contexts. Online platforms provide a highly controlled format for such research. In this pilot trial, 55 adults were randomized to: ACT-Open (i.e., acceptance, defusion components), ACT-Engaged (i.e., values, committed action), or ACT-Combined (i.e., acceptance, defusion, values, committed action). Each condition was 12 sessions over six weeks, with assessments at baseline, posttreatment, and four-week follow-up. ACT-Open, ACT-Engaged, and ACT-Combined all significantly improved from pre- to post-treatment on mental health, psychosocial functioning, and …

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Empowering Collaborations And Creating Brave Spaces: People Of Color In Library And Information Science Summit, Nataly Blas, Aisha Conner-Gaten, Rachel Deras, Jessea Young Jan 2019

Empowering Collaborations And Creating Brave Spaces: People Of Color In Library And Information Science Summit, Nataly Blas, Aisha Conner-Gaten, Rachel Deras, Jessea Young

Librarian Publications & Presentations

The William H. Hannon Library at Loyola Marymount University (LMU) in Los Angeles, California, held the first People of Color in Library and Information Science (POC in LIS) Summit on July 13, 2018. The summit was a collaborative planning effort by LMU librarians to create a productive and brave space for POC, especially women and marginalized identities, working in the information sector. The POC in LIS Summit invited participants to challenge their roles as information workers and acknowledge that dominant narratives may be disrupted.

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Regulating Panhandling: Reed And Beyond, Judith Welch Wegner, Matthew Norchi Jan 2019

Regulating Panhandling: Reed And Beyond, Judith Welch Wegner, Matthew Norchi

South Dakota Law Review

No abstract provided.

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Pharmacy Benefit Managers And Generic Pharmaceuticals Pricing Conspiracy: Unveiling Lock-In Mechanisms, Structural Shortcomings And Antitrust Evidence, Kwanghyuk Yoo Jan 2019

Pharmacy Benefit Managers And Generic Pharmaceuticals Pricing Conspiracy: Unveiling Lock-In Mechanisms, Structural Shortcomings And Antitrust Evidence, Kwanghyuk Yoo

South Dakota Law Review

No abstract provided.

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Ucf Libraries Edi-Related Initiatives 2019 Report, Penny Beile Jan 2019

Ucf Libraries Edi-Related Initiatives 2019 Report, Penny Beile

Libraries' Documents

No abstract provided.

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Post Script Motorcycle Theft In The United States: A Brief Guide For Riders, Thad A. Titze Jan 2019

Post Script Motorcycle Theft In The United States: A Brief Guide For Riders, Thad A. Titze

South Dakota Law Review

No abstract provided.

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Osgoode Syllabus Of Courses And Seminars: 2019 - 2020, Office Of Student Services Jan 2019

Osgoode Syllabus Of Courses And Seminars: 2019 - 2020, Office Of Student Services

Syllabi

No abstract provided.

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Efficient Synthesis And Antifungal Investigation Of Nucleosides' Quaternary Ammonium Salt Derivatives, Barbara Dmochowska, Lucyna Pellowska-Januszek, Justyna Samaszko-Fiertek, Rafal Slusarz, Roland Wakiec, Janusz Madaj Jan 2019

Efficient Synthesis And Antifungal Investigation Of Nucleosides' Quaternary Ammonium Salt Derivatives, Barbara Dmochowska, Lucyna Pellowska-Januszek, Justyna Samaszko-Fiertek, Rafal Slusarz, Roland Wakiec, Janusz Madaj

Turkish Journal of Chemistry

Quaternary ammonium salts are a group of compounds with diverse biological properties, the most important of which are their antiviral, antibacterial, and antifungal activities. The quaternization reactions of 5'-$O$-tosyl derivatives of uridine and thymidine with triethylamine, trimethylamine, 4-($N$,$N$-dimethylamino)pyridine, 2-methylpyridine, and pyridine are described in this article. Two of the synthesized compounds are exceptional because they are first of this type that demonstrate concentration-dependent antifungal in vitro activity against two species of the genus Candida in minimal YNB-SG medium. The experimental results have been extended by adding full atom molecular dynamics simulations and substrates and products energies evaluation.

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Plasma O$_{2}$ Modifies The Structure Of Synthetic Zeolite-A To Improve The Removal Of Cadmium Ions From Aqueous Solutions, Alaa Fahmy, Ahmed Elzaref, Hanan Youssef, Hassan Shehata, Magdy Wassel, Jörg Friedrich, Fabienne Poncin-Epaillard, Dominique Debarnot Jan 2019

Plasma O$_{2}$ Modifies The Structure Of Synthetic Zeolite-A To Improve The Removal Of Cadmium Ions From Aqueous Solutions, Alaa Fahmy, Ahmed Elzaref, Hanan Youssef, Hassan Shehata, Magdy Wassel, Jörg Friedrich, Fabienne Poncin-Epaillard, Dominique Debarnot

Turkish Journal of Chemistry

The present study addresses the removal of cadmium ions (Cd(II)) from aqueous solutions at a pH of 7.5 using zeolite-A activated by exposure to oxygen plasma. The activation process was performed over a wide range of plasma powers (10, 20, 30, and 40 W) and exposure times (30 to 360 s). Oxygen plasma cannot chemically modify zeolite to a considerable extent, but it can clean the surface, open blocked pores, and induce the formation of additional OH groups via exposure to humidity in ambient air. Therefore, Cd$^{+2}$ ion removal is increased by approximately 10% with the plasma treatments. Infrared-attenuated total …

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Comparative Study Of Solvent Extraction Of Molybdenum By Various Extractants, Abdoul Rachid Chaibou Yacouba, Salmana Laouali Ibrahim, Ibrahim Natatou Jan 2019

Comparative Study Of Solvent Extraction Of Molybdenum By Various Extractants, Abdoul Rachid Chaibou Yacouba, Salmana Laouali Ibrahim, Ibrahim Natatou

Turkish Journal of Chemistry

Solvent extraction of molybdenum from various acid media by Alamine 336, Aliquat 336, TOPO, and DEHPA in kerosene was studied. The extraction efficiency of molybdenum by diisobutyl ketone (DIBK), the effects of various parameters like diluents, mineral acids, extractant concentration, and applications of these extractants on molybdenum extraction contained in the uranium-bearing ore solutions were investigated. DIBK used as solvent can indeed extract the molybdenum without adding any extractants in the range of 20-50 mg/L. Molybdenum was extracted by Aliquat 336 in all mineral acids at more than 90%. On the basis of slope analysis, the compositions of the extracted …

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Synthesis Of Highly Active Crystalline Carbon Nitride Prepared In Various Salt Melts For Photocatalytic Degradation Of Phenol, Mohd Hayrie Mohd Hatta, Hendrik Oktendy Lintang, Siew Ling Lee, Leny Yuliati Jan 2019

Synthesis Of Highly Active Crystalline Carbon Nitride Prepared In Various Salt Melts For Photocatalytic Degradation Of Phenol, Mohd Hayrie Mohd Hatta, Hendrik Oktendy Lintang, Siew Ling Lee, Leny Yuliati

Turkish Journal of Chemistry

Crystallinity could have a decisive influence on photocatalytic performance. In this study, the synthesis of crystalline carbon nitride (CN) was studied via an ionic melt polycondensation of urea precursor in the presence of various salt melts, which were KCl-LiCl, KCl-NaCl, and KCl-ZnCl$_{2}$. While all the salt melts helped to improve the optical properties of the CN, only KCl-LiCl salt melt could form crystalline CN as evidenced by its X-ray diffraction pattern. Furthermore, the specific surface area of CN (72 m$^{2}$/g) was maintained when using KCl-LiCl (73 m$^{2}$/g), but it was decreased in the presence of KCl-NaCl (22 m$^{2}$/g) or KCl-ZnCl$_{2}$ …

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Crystal Structure And Hirshfeld Surface Analysis Of 1,2-Ethylene-Bis (Para-Methyl Pyridinium) Dichromate As A New Selective And Mild Agent In Oxidation Of Alcohols, Mostafa Gholizadeh, Mehrdad Pourayoubi, Mohammad Reza Houssiendokht, Hadi Amiri Rudbari, Masoumeh Farimaneh, Anahid Saneei, Giuseppe Bruno Jan 2019

Crystal Structure And Hirshfeld Surface Analysis Of 1,2-Ethylene-Bis (Para-Methyl Pyridinium) Dichromate As A New Selective And Mild Agent In Oxidation Of Alcohols, Mostafa Gholizadeh, Mehrdad Pourayoubi, Mohammad Reza Houssiendokht, Hadi Amiri Rudbari, Masoumeh Farimaneh, Anahid Saneei, Giuseppe Bruno

Turkish Journal of Chemistry

1,2-Ethylene-bis(para-methyl pyridinium) dichromate, (C$_{14}$H$_{18}$N$_{2})$[Cr$_{2}$O$_{7}$], is used as a new oxidizing agent in conversion of some alcohols to their corresponding carbonyl compounds in CH$_{3}$CN solvent and also under solvent-free conditions. In both procedures, high conversion percentages are observed. However, a much shorter reaction time is achieved in solvent-free conditions. For allylic alcohols, the C=C bond is not oxidized and the examined saturated alcohol in this work (i.e. cyclo-hexanol) remains intact, which illustrates the mild nature of reagent used. The structure of the reagent is investigated by single-crystal X-ray diffraction analysis. The C--H$\cdots$O and O$\cdots \pi$ interactions are the most important features …

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Plasma Polymerized Linalool (Pplin): An Antimicrobial And Biocompatible Coating, Kenan Çakmak, Özkan Bayram, Kübra Solak, Güzi̇n Kaban, Önder Şi̇mşek, Ahmet Mavi̇ Jan 2019

Plasma Polymerized Linalool (Pplin): An Antimicrobial And Biocompatible Coating, Kenan Çakmak, Özkan Bayram, Kübra Solak, Güzi̇n Kaban, Önder Şi̇mşek, Ahmet Mavi̇

Turkish Journal of Chemistry

Bacterial infections in medical devices and drug resistance of bacteria can cause chaos in the world due to loss of lives in addition to the cost of device revisions, quarantine, disinfection of infected areas, and patient treatment. Antibacterial coatings of essential oils on medical devices can prevent bacterial attachment and reduce costs. Linalool is an antibacterial constituent of essential oils. Herein, we examine for the first time the fabrication and characterization of radio frequency (RF) plasma polymerized hydrophilic thin films from linalool (ppLin) by varying deposition parameters (RF power and deposition time) and the behavior of ppLin with two bacteria …

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Investigation Of The Ideal Composition Of Metal Hexacyanocobaltates With High Water Oxidation Catalytic Activity, Ferdi̇ Karadaş Jan 2019

Investigation Of The Ideal Composition Of Metal Hexacyanocobaltates With High Water Oxidation Catalytic Activity, Ferdi̇ Karadaş

Turkish Journal of Chemistry

The electrocatalytic activities of Prussian blue analogues (PBAs) have recently received much attention due to their robustness and efficiency. Considering that PBAs with hexacyanocobaltate building block stand forward among other PBAs, a systematic study on a family of metal hexacyanocobaltates is presented in this study. Metal hexacyanocobaltates (M $=$ Co, Mn, Ni, and Fe) were prepared, characterized, and electrochemical studies were performed. A series of mixed-metal cobalt-iron hexacyanocobaltates has also been studied to determine the ideal composition of a metal hexacyanocobaltate for electrocatalytic water oxidation process. The overall study clearly indicates that cobalt hexacyanocobaltate exhibits the highest electrocatalytic activity among …

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Spectrophotometric Methods For The Determination Of Fluoride Ion Using Indole-3-Acetic Acid Interaction With Iron(Iii), Emi̇ne İlknur Öztürk, Adnan Kenar, Mehmet Levent Aksu, Mustafa Taşteki̇n Jan 2019

Spectrophotometric Methods For The Determination Of Fluoride Ion Using Indole-3-Acetic Acid Interaction With Iron(Iii), Emi̇ne İlknur Öztürk, Adnan Kenar, Mehmet Levent Aksu, Mustafa Taşteki̇n

Turkish Journal of Chemistry

This study is related to the determination of fluoride ion by the conversion of pink-colored Fe(III) and indole-3-acetic acid (IAA) into a colorless hexafluoride ferrite complex with the addition of fluoride. The optimum conditions of the complex formation were found to be pH 1.7 and a temperature of 60 $^{\circ}$C C. The maximum absorption wavelength of the complex and the detection limit of the method were 525 nm and 0.26 mg/L, respectively. The interfering effects of the different cations (Ag$^{+}$, Al$^{3+}$, Ba$^{2+}$, Ca$^{2+}$, Cd$^{2+}$, Co$^{2+}$, Cu$^{2+}$, K$^{+}$, Mg$^{2+}$, Na$^{+}$, Ni$^{2+}$, Pb$^{2+})$ and anions (SO$_{4}^{2-}$, SO$_{3}^{2-}$, NO$_{2}^{-}$, I$^{-}$, Br$^{-}$, Cl$^{-}$, SCN$^{-}$, …

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Boric Acid As An Efficient And Green Catalyst For The Synthesis Of 2-Amino-4,6-Diarylnicotinonitrile Under Microwave Irradiation In Solvent-Free Conditions, Zahra Hosseinzadeh, Ali Ramazani, Nima Razzaghi-Asl, Katarzyna Slepokura, Tadeusz Lis Jan 2019

Boric Acid As An Efficient And Green Catalyst For The Synthesis Of 2-Amino-4,6-Diarylnicotinonitrile Under Microwave Irradiation In Solvent-Free Conditions, Zahra Hosseinzadeh, Ali Ramazani, Nima Razzaghi-Asl, Katarzyna Slepokura, Tadeusz Lis

Turkish Journal of Chemistry

Microwave irradiation has been used to improve the one-pot synthesis of substituted 2-amino-4,6-diarylnicoti- nonitrile in the presence of boric acid as an efficient and green catalyst under solvent-free conditions within 48--60 s. All the analogs that have not been reported previously were characterized by their melting points, IR, $^{1}$H NMR, and $^{13}$C NMR spectra. One of the structures was verified by the analysis of a single crystal. The reported synthetic procedure provided remarkable advantages such as short reaction times, excellent yield, facile workup, and the use of a green catalyst.

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Removal Of Cr(Vi) From Wastewater Through Glycine Assisted Synthesis Of Tio$_{2}$, Bi̇lsen Kurtteki̇n, Demet Özer, Nurşen Altuntaş Öztaş Jan 2019

Removal Of Cr(Vi) From Wastewater Through Glycine Assisted Synthesis Of Tio$_{2}$, Bi̇lsen Kurtteki̇n, Demet Özer, Nurşen Altuntaş Öztaş

Turkish Journal of Chemistry

In this study, titanium dioxide was synthesized via solution combustion method. Titanium(IV) oxysulfate was used as a titanium source. The fuel type, reaction time, and reaction temperature were tested for optimization. The glycine was set as a suitable fuel. Structural properties of the final product were characterized by p-XRD. Scanning electron microscopy (SEM) and BET techniques were used to examine the morphology. The synthesized products were compared to the commercial TiO$_{2}$ and it was found that the titanium dioxide with the high surface area (63.628 m$^{2}$/g) has been successfully synthesized by solution combustion method with time and energy saving. In …

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An Exploration Of New Avenues Regarding Deep Tissue Penetration And Higher Singlet Oxygen Efficiencies: Novel Near-Ir Photosensitizers For Photodynamic Therapy, Ni̇sa Yeşi̇lgül, Bi̇lal Kiliç Jan 2019

An Exploration Of New Avenues Regarding Deep Tissue Penetration And Higher Singlet Oxygen Efficiencies: Novel Near-Ir Photosensitizers For Photodynamic Therapy, Ni̇sa Yeşi̇lgül, Bi̇lal Kiliç

Turkish Journal of Chemistry

A series of novel BODIPY-bearing electron-withdrawing groups at the meso position are reported here. According to the optical measurements, it may be clearly seen that the introduction of electron-donating groups into 3,5-positions and the presence of electron-withdrawing groups at the meso position of the BODIPY core resulted in spectacular bathochromic shifts (up to ∼ 304 nm), and the projected photosensitizers had absorption bands in the therapeutic window of the electromagnetic spectrum (600-900 nm). The absorption maxima of compounds 4,5,6, and 7 were at 886 nm, 890 nm, 760 nm, and 761 nm, respectively. The singlet oxygen generation experiments revealed that …

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Electrochemical Oxidation Of Curcuminoids: An Experimental And Computational Investigation, Zeynep Kalaycioğlu, Nurgül Karadaş, Mehmet Emi̇n Çinar, Si̇bel Ayşil Özkan, Duri̇şehvar Özer Ünal, Ayşegül Gölcü, Fatma Bedi̇a Eri̇m Jan 2019

Electrochemical Oxidation Of Curcuminoids: An Experimental And Computational Investigation, Zeynep Kalaycioğlu, Nurgül Karadaş, Mehmet Emi̇n Çinar, Si̇bel Ayşil Özkan, Duri̇şehvar Özer Ünal, Ayşegül Gölcü, Fatma Bedi̇a Eri̇m

Turkish Journal of Chemistry

Curcuminoids, reported to have important biological properties, such as antioxidant, anti-Alzheimer, and antidiabetic properties, comprise curcumin (CRM; 1,7-bis [4-hydroxy-3-methoxyphenyl]-1,6-heptadiene-3,5-dione) and its derivatives demethoxycurcumin (DMC; (E,6E)-1-(3,4-dimethoxy-cyclohexyl)-7-(3,4-dimethoxyphenyl)hepta-1,6-diene-3,5-dione) and bisdemethoxycurcumin (BDMC; 1,7-bis[4-hydroxyphenyl]-1,6-heptadiene-3,5-dione). Their electrochemical oxidations are thoroughly explored by applying cyclic and differential pulse voltammetric techniques. The dependence of current intensities and potentials on pH, concentration, scan rate, and nature of the buffer was investigated. The outcome is supported by density functional theory computations indicating the transfer of 4-e$^{-}$/H$^{+}$, 6-e$^{-}$/H$^{+}$, and 8-e$^{-}$/H$^{+}$ couples involved in the oxidation mechanisms of CRM, DMC, and BDMC, respectively, leading to the formation of the same oxidized product.

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Electrodeposition Of Tin(Ii) From Citrate Complexes, Yuliya Yapontseva, Valeriy Kublanovsky Jan 2019

Electrodeposition Of Tin(Ii) From Citrate Complexes, Yuliya Yapontseva, Valeriy Kublanovsky

Turkish Journal of Chemistry

This paper provides the calculation of the distribution of the concentrations of complex particles of the Sn(II) - citrate - water system in the solution volume, on the surface of the electrode, and in the diffusion layer for the tin citrate electrolyte containing an excess of the ligand. Based on the calculations for the electrodeposition of tin, an electrolyte containing [SnCit]$^{2-}$ complex at pH 8.0 was chosen. The kinetic parameters of the discharge stage, the diffusion coefficient of the electrochemical active ion, and the current efficiency of tin were determined by the methods of stationary voltammetry and chronovoltamperometry. It is …

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Novel "Turn Off-On" Sensors For Detection Of Dna-Acrylamide Interaction Using Zns Quantum Dots As A Phosphorescent Probe, Hayri̇ye Eda Şatana Kara Jan 2019

Novel "Turn Off-On" Sensors For Detection Of Dna-Acrylamide Interaction Using Zns Quantum Dots As A Phosphorescent Probe, Hayri̇ye Eda Şatana Kara

Turkish Journal of Chemistry

A novel "turn off-on" sensor for detection of interaction between DNA and acrylamide (ACR) was developed. In this method, L-cysteine capped Mn-doped ZnS quantum dots (QDs) were used as room temperature phosphorescent probes. In the ``turn-off'' mode, ACR was absorbed onto the surface of QDs via electrostatic interaction, which caused a quenching effect of room-temperature phosphorescence signal by photoinduced electron-transfer mechanism. ACR was removed from the QDs' surface with the addition of DNA. Thus, the phosphorescence emission of QDs was recovered and the system was turned to the ``turn-on'' mode. The quenching mechanism of QDs by ACR was collisional (dynamic) …

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Synthesis Of Novel Azo Linkage-Based Schiff Bases Including Anthranilic Acid And Hexanoic Acid Moieties: Investigation Of Azo-Hydrazone And Phenol-Keto Tautomerism, Solvatochromism, And Ionochromism, Özlem Özdemi̇r Jan 2019

Synthesis Of Novel Azo Linkage-Based Schiff Bases Including Anthranilic Acid And Hexanoic Acid Moieties: Investigation Of Azo-Hydrazone And Phenol-Keto Tautomerism, Solvatochromism, And Ionochromism, Özlem Özdemi̇r

Turkish Journal of Chemistry

Two new azo-Schiff base receptors (L$_{{1}}$ and L$_{{2}})$ containing azo and azomethine groups with a conjugated group (benzyl ring of anthranilic acid, in L$_{{1}})$ and electron-donating group (alkyl chain of hexanoic acid, in L$_{{2}})$ were synthesized and characterized. Azo-hydrazone/phenol-keto tautomerism and solvatochromism were investigated. Studying their sensing ability towards cations (Co$^{2+}$, Cu$^{2+}$, Zn$^{2+}$, Ni$^{2+}$, Pb$^{2+}$, Cd$^{2+}$, Mn$^{2+}$, Fe$^{3+}$, Cr$^{3+}$, and Al$^{3+})$, high sensitivity and selectivity were recorded for Fe$^{3+}$ by naked eye and UV-Vis spectra in DMF-aqueous HEPES buffer (v:v, 1:1, pH 6.8). The color of L$_{{1}}$ and L$_{{2}})$ solutions instantly changed from yellow to deep orange and pale orange. …

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Progress In The Chemistry Of 3-Amino-9-Ethylcarbazole, Samir Bondock, Salwa Alqahtani, Ahmed M. Fouda Jan 2019

Progress In The Chemistry Of 3-Amino-9-Ethylcarbazole, Samir Bondock, Salwa Alqahtani, Ahmed M. Fouda

Turkish Journal of Chemistry

Generally, 3-amino-9-ethylcarbazole is considered a versatile compound not only for its unique electronic properties but also for its significance as a building block in synthetic, pharmaceutical, and material chemistry. The synthesis, chemical reactivity, and applications of 3-amino-9-ethylcarbazole are described in this review. The presence of the amino group at position 3 exhibits a unique reactivity with both C-2 and C-4. The reactions of 3-amino-9-ethylcarbazole are divided into three categories, reactions that involve the amino group and cyclization reactions that involve the amino group and C-2 and/or C-4. In this review, relevant and appropriate applications of the synthesized, isolated, and condensed …

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