Ionic Thermoelectric Paper,
2017
Linköping Universitet, Sweden
Ionic Thermoelectric Paper, Fei Jiao, Ali Naderi, Dan Zhao, Joshua Schlueter, Maryam Shahi, Jonas Sundström, Hjalmar Granberg, Jesper Edberg, Ujwala Ail, Joseph W. Brill, Tom Lindström, Magnus Berggren, Xavier Crispin
Physics and Astronomy Faculty Publications
Ionic thermoelectric materials, for example, polyelectrolytes such as polystyrene sulfonate sodium (PSSNa), constitute a new class of materials which are attracting interest because of their large Seebeck coefficient and the possibility that they could be used in ionic thermoelectric SCs (ITESCs) and field effect transistors. However, pure polyelectrolyte membranes are not robust or flexible. In this paper, the preparation of ionic thermoelectric paper using a simple, scalable and cost-effective method is described. After a composite was fabricated with nanofibrillated cellulose (NFC), the resulting NFC–PSSNa paper is flexible and mechanically robust, which is desirable if it is to be used in …
Investigating Students’ Basic Needs And Motivation In College Chemistry Courses With The Lens Of Self-Determination Theory,
2017
University of South Florida
Investigating Students’ Basic Needs And Motivation In College Chemistry Courses With The Lens Of Self-Determination Theory, Yujuan Liu
USF Tampa Graduate Theses and Dissertations
More graduates in science, technology, engineering, and mathmetics (STEM) fields are needed to keep our nation’s preeminance in the global fields of technology and science. However, fewer than 40% of students who intend to major in STEM fields when entering college complete a STEM degree. Therefore, it is important to explore factors to improve student persistence in STEM fields at the college level as well as to understand the interrelationship between student motivation, academic achievement, and persistence. Motivation is strongly associated with student achievement and persistence; meanwhile, academic achievement can also affect persistence. Self-determination theory (SDT) represents a framework of …
Electrochemical Deposition Of Cr From Cr3+ In The Mixed Electrolyte Of [Bmim]Oac/H2O,
2017
State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;
Electrochemical Deposition Of Cr From Cr3+ In The Mixed Electrolyte Of [Bmim]Oac/H2O, Wei Luo, Dong-Fang Niu, Rong-Bin Du, Jun-Wei Wang, Zhu-Qing Wang, Heng Xu, Xin-Sheng Zhang
Journal of Electrochemistry
The electrochemical reduction of trivalent chromium ion (Cr3+) to Cr in 1-butyl-3-methylimidazolium acetate ([BMIM]OAc)-H2O mixed electrolyte was investigated. The cyclic voltammograms showed that the electroreduction of Cr3+ in the mixed electrolyte occurred in a two-step process, namely, Cr3+ + e → Cr2+ and Cr2+ + 2e→ Cr0, controlled by the diffusion of Cr3+ to the electrode. The diffusion coefficient of Cr3+ was 1.2×10-8 cm2/s at 40 ℃ obtained by Rendle-Sevcik equation. The chronoamperomograms of the Cr3+ electrodeposition confirmed the three-dimensional instantaneous nucleation mechanism of …
Research Progresses Of α-CH Bond Functionalizations Under Electrochemical Conditions,
2017
Hefei National Laboratory for Physical Sciences at Microscale and Department of Chemistry, University of Science and Technology of China Hefei, 230026, P. R. China;
Research Progresses Of α-CH Bond Functionalizations Under Electrochemical Conditions, Peng Qian, Mei-Xiang Bi, Yu-Kang Wang, Zheng-Gen Zha, Zhi-Yong Wang
Journal of Electrochemistry
Recently, organic electrochemical synthesis has emerged as the most important and attractive method to construct carbon-carbon bond and carbon-heteroatom bonds in organic synthetic chemistry. This review mainly summarizes the electrochemical syntheses at present, especially focused on the recent progresses in our research group using an iodine radical as a mediator to promote α-C?H bond functionalization. The organic electrosynthesis provides an alternative approach and a new research direction in the development of green organic synthesis.
Study On The Electrochemical Redox Mechanism Of Emodin,
2017
Department of Chemistry, Anhui University, Hefei 230601, China;
Study On The Electrochemical Redox Mechanism Of Emodin, Dan Li, Bao-Kang Jin
Journal of Electrochemistry
The electrochemical reduction of emodin (Q) has been investigated in acetonitrile by cyclic voltammetry (CV), IR spectroelectrochemistry cyclic voltabsorptometry (CVA) and derivative cyclic voltabsorptometry (DCVA) techniques. It was found that anion radical Q•− interacted with neutral Q to form dimer Q2•− which was further reduced to Q22− at more negative potentials. A two-step one-electron process involving electrochemical reductions of Q22− to form Q23− in the first step and Q24− in the second step, corresponding to the two cathodic peaks of C3 and C4 in CV curves was …
Selective Direct Electro-Oxidation Of C-H Bond,
2017
Chinese Chemical Society | Xiamen University
Selective Direct Electro-Oxidation Of C-H Bond, Yan-Mei Liao, Qian-Qian Wu, An-Lun Zhang, Ying-Hong Zhu, Chun-An Ma
Journal of Electrochemistry
Carbon-hydrogen (C-H) bond is the most basic chemical bond in organic compounds. The activation and direct conversion of C-H bond are the effective methodology for synthesis of different kinds of organic compounds from alkane compounds. The oxidative activation and functionalization of C-H bonds constitute an important and challenging area of investigation. The electro-oxidative activation of C-H bonds to form new C-O, C-C and C-N bonds has proven to be interesting and important in organic chemistry using the clean electron as the oxidant. The target C-O, C-C and C-N compounds could be selectively achieved by choosing the appropriate electrode, supporting electrolyte …
Special Issue: 15th National Symposium On Organic Electrochemistry And Electrochemical Industry,
2017
State Key Laboratory of Chemical Engineering, East China University of Science and Technology;
Special Issue: 15th National Symposium On Organic Electrochemistry And Electrochemical Industry, Xinsheng Zhang, Chengchu Zeng
Journal of Electrochemistry
Organic ElectroChemistry（OEC） is an interdiscipline of Organic Chemistry and Electrochemical Technology. Compared with conventional chemical synthesis, organic electrosynthesis eliminates the utilization of toxic and / or dangerous redox reagents and proceeds under mild conditions with higher reaction selectivity, thereby has been widely used in synthesis of fine chemicals of drug, flavor, dyes and synthetic fibers. With the increasing concern of environmental problems, increasing attention has been paid to organic electrosynthesis. In the electrochemical oxidation and reduction processes, electron is used as a reagent to remove from and add to the substrates. Without utilization of stoichiometric chemical reagents and without generating …
Preparations And Characterizations Of Ti/Pbo2 Electrodes Modified With Rare Earth Of Praseodymium And Pvp In Electrochemical Degradation Of Organics,
2017
School of Chemistry and Material Engineering; Huainan Normal University; Huainan, Anhui 232038, P. R. China;
Preparations And Characterizations Of Ti/Pbo2 Electrodes Modified With Rare Earth Of Praseodymium And Pvp In Electrochemical Degradation Of Organics, Mai Xu, Feng-Wu Wang, Xian Liang, Yi-Jun Wei, Wen-Yan Fang, Chuan-Gao Zhu, Yun-Hu Hun
Journal of Electrochemistry
The titanium (Ti) based lead oxide (PbO2) electrodes doped with praseodymium oxide (Pr2O3) and polyvinylpyrrolidone (PVP) were prepared by electrodeposition. The surface morphologies and structures of the as-prepared thin films were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD) technique, respectively. The results showed that the denser and more uniform coatings with smaller particles and larger surfaces were obtained by doping, which modified the micro-structure of the Ti/SnO2-Sb2O3/Pr2O3-PVP-PbO2 electrode. Cyclic voltammetry (CV) was also used to study the electrocatalytic activity of …
Electrocarboxylation: An Effective Process For Fixation Of Co2 Into Organic Carboxylic Acids,
2017
Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China;
Electrocarboxylation: An Effective Process For Fixation Of Co2 Into Organic Carboxylic Acids, Huan Wang, Jia-Xing Lu
Journal of Electrochemistry
Conversion and utilization of greenhouse gas carbon dioxide (CO2) have become more and more significant to the sustainable development of the global economy. Among them, electrocarboxylation of organic substrates is an effective process. Under mild conditions such as ambient temperature and pressure, carbocations generated by electroreduction of organic substrates can react with CO2 into corresponding carboxylic acids. This paper introduces the recent progress of our group in electrochemical carboxylation, including electrocarboxylation of varies active organic substrates and asymmetric electrocarboxylation.
Wastewater Treatment Process Based On Microbial Electrochemistry: Opportunities And Challenges,
2017
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, No.73 Huanghe Road, Nangang District, Harbin 150090, P.R.China;
Wastewater Treatment Process Based On Microbial Electrochemistry: Opportunities And Challenges, Wei-Hua He, Jia Liu, Hai-Man Wang, Yu-Jie Feng
Journal of Electrochemistry
Microbial electrochemical technology (MET) has drawn great attention for its characteristics of synergetic pollution removal and energy recovery of wastewater. In the last decade, significant developments in microbial electrochemical system (MES) have been made in the aspects of electron transfer mechanism, microbial community analysis, function expansion, low-cost electrode materials and scaled-up constructions. However, the feasibility of MET as a wastewater treatment process has been controversial so far. In this paper, the characteristics of MET were systematically compared with anaerobic and aerobic processes from the application point of view in the aspects of pollution degradation and energy recovery processes. The MET-based …
Electrochemical Synthesis Of Homoallylic Alcohols And Homoallylic Amines,
2017
Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong 510641, China;
Electrochemical Synthesis Of Homoallylic Alcohols And Homoallylic Amines, Wei-Qiang Zhong, Xiang-Hui Liang, Jing-Mei Huang
Journal of Electrochemistry
Electrochemical technique has been widely applied in the organic synthesis. This review focuses on the electrochemical synthesis of homoallylic alcohols and homoallylic amines from the allylation of carbonyl compounds and imines. This method has been developed impressively, especially in the field of electrochemical allylation in a green solvent of aqueous media. Improvement of the efficiency of the electricity, regio-selectivity and chiral synthesis are expected.
Cathodic Electrochemiluminescence Of Meso-Tetra(4-Sulfophenyl)Porphyrin/Potassium Peroxydisulfate System,
2017
Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, China;
Cathodic Electrochemiluminescence Of Meso-Tetra(4-Sulfophenyl)Porphyrin/Potassium Peroxydisulfate System, Yan-Fenga Wang, Dia Luo, Duo-Liang Shan, Xiao-Quan Lu
Journal of Electrochemistry
A new electrochemiluminescence (ECL) system in aqueous solution was constructed by using meso-tetra(4-sulfophenyl)porphyrin (TSPP) as a luminophoreand potassium peroxydisulfate (K2S2O8) as a reductive–oxidative coreactant. Upon sweeping from 0 V to -1.5 V, two cathodic ECL peaks were found simultaneously. One appeared at -0.8 V, which is corresponding to the reduction of TSPP, another at -1.2 V, that is attributed to the reduction of K2S2O8. And methylene blue could quench the ECL of TSPP effectively. In accordance with the linearity between quenching efficiency and the concentration of methylene blue, a method to determine methylene blue was established. The ECL mechanism was …
Characteristics And Mechanism For The Simons Electrochemical Fluorination Of Methanesulfonyl Fluoride,
2017
Coll. of Chem. & Chem. Eng., Yangzhou University, Yangzhou 225002, Jiangsu, China;
Characteristics And Mechanism For The Simons Electrochemical Fluorination Of Methanesulfonyl Fluoride, Wen-Lin Xu, Bao-Tong Li, Da-Wei Wang, Ya-Qiong Wang
Journal of Electrochemistry
The characteristics and mechanism for the Simons electrochemical fluorination processes were investigated during the electrochemical fluorination of CH3SO2F to CF3SO2F. The results showed that the reaction mechanism for the electrochemical fluorination of organic compounds to organic fluorides was the same as that of chemical fluorination processes using fluorinating agents such as CoF3. The electrochemical fluorination in anhydrous HF was a heterogeneous process, and nickel fluorides on the surface of the nickel anode played the role of a mediator in the Simons process to transfer oxidation potential from the anode to …
Ionic Liquid-Supported Tempo/Polymeric Ionic-Liquid/Carbon Black Ternary Composites: Preparations And Applications In Electrochemical Oxidation Of Alcohols,
2017
School of Chemistry, biology & Materials Science, East China University of Technology, Nanchang 330013;
Ionic Liquid-Supported Tempo/Polymeric Ionic-Liquid/Carbon Black Ternary Composites: Preparations And Applications In Electrochemical Oxidation Of Alcohols, Xin Lin, Cao-Cao Sun, Zhi-Rong Liu, Cheng-Chu Zeng
Journal of Electrochemistry
To effectively recover redox catalyst and supporting electrolyte, a novel ternary composite consisting of ionic liquid-supported TEMPO, polymeric ionic-liquid and carbon black was prepared. The ionic-liquid supported redox catalyst TEMPO-IL-BF4 was firstly synthesized from 4-hydroxy-2,2,6,6-tetramethylpiperidine-N-oxyl, and followed by the reaction of polydimethyldiallylammonium chloride (PDDA) and bis(trifluoromethane)sulfonimide lithium salt (LiTFSI) to form poly[diallyldimethylammonium bis(trifluoromethanesulfonyl)imide] (PDDA(Tf2N)). A combination of the above mentioned two synthesized materials and carbon black afforded to obtain the ternary composite, which was used as the recoverable supporting electrolyte and mediator for the electrochemical oxidation of alcohol. The results indicate that various alcohols could be oxidized …
Preparations And Applications Of Irsnox Electrode In Electrochemical Synthesis Of 2,5-Dichlorophenol,
2017
Department of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China;Department of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng 224051 Jiangsu, China;
Preparations And Applications Of Irsnox Electrode In Electrochemical Synthesis Of 2,5-Dichlorophenol, Xiang-Yu Ma, Xu-Guo Tu, Rui-Nan He, Ya Chen, Gui-Sheng Zhu, Shou-Yan Shao, Song Chen
Journal of Electrochemistry
The electrodes of titanium based iridium tin oxides (IrSnOx) have been prepared by traditional thermal decomposition method and further applied to the electrosynthsis of 2,5-dichlorophenol in order to explore a green and high efficient synthesis route. The results showed that the electrode surface existed apparent cracks, while the intermediate layer prepared with Sn:Sb=94:6 existed less cracks and longer life time. The main products of the electrolytic reaction were 2,5-dichlorophenol, p-chlorophenol, and 1,2,4-trichlorobenzene. The electrosynthsis yield of 2,5-dichlorophenol reached 57% and the selectivity of 2,5-dichlorophenol was as high as 93% by using the IrSnOx as an anode, which is obviously better …
Electrocatalysis Of Nanotin Dioxide In The Battery Reaction Of Zinc-Nitrobenzene,
2017
Department of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China;Department of Chemistry and Chemical Engineering, Yancheng Institute of Technology,Yancheng 224051, Jiangsu, China;
Electrocatalysis Of Nanotin Dioxide In The Battery Reaction Of Zinc-Nitrobenzene, Xu-Guo Tu, Xiang-Yu Ma, Rui-Nan He, Xiao-Juan Wang, Chen Ling, Yun-Xia Sun, Song Chen
Journal of Electrochemistry
The tin dioxide (SnO2) nanoparticles were synthesized by using a simple hydrothermal route in the presence of tetrapropyl ammonium bromide (TPAB) as a surfactant. Accordingly, the titanium mesh based SnO2 catalyst electrode was prepared. The morphologies and structures of SnO2 nanostructures were characterized by scanning electron microscopy and X-ray diffraction spectrometry. The influences of reactant concentration, reaction temperature and time on the morphology of the products were investigated in detail. The electrocatalytic performance of SnO2 for the reduction of nitrobenzene with zinc was studied. Possible formation process and growth mechanism for such hierarchical SnO2 …
Comparison Of Crystal Structures Of The Tetramethylammonium And Sodium Salts Of 3-Nitrophenolate,
2017
Berry College
Comparison Of Crystal Structures Of The Tetramethylammonium And Sodium Salts Of 3-Nitrophenolate, Stephanie E. Bettis, Michael W. Mathias, Kenneth L. Martin
Georgia Journal of Science
The addition of either sodium hydroxide or tetramethylammonium hydroxide to 3-nitrophenol led to orange-red crystals of sodium 3-nitrophenolate dihydrate or a complex of 3-nitrophenol and tetramethylammonium 3-nitrophenolate. For the sodium salt, 11707 Mo-Kα reflections were measured at 150 K via Bruker SMART 1-K CCD diffractometer. For the tetramethylammonium salt, 12664 Mo-Kα reflections were measured at 173 K via Bruker SMART 2-K CCD diffractometer. The unit cell of the sodium salt has: a = 6.814(1) Å, b = 6.5437(8) Å, c = 18.206(4) Å, β = 94.46(3)°, V = 809.4(3) Å3, space group = P21/n. The unit …
The Quantification Of Cocaine From The Erythroxylum Coca Plant And The Comparison On High Performance Liquid Chromatography And Gas Chromatography Mass Spectroscopy As An Analytical Method.,
2017
CUNY John Jay College
The Quantification Of Cocaine From The Erythroxylum Coca Plant And The Comparison On High Performance Liquid Chromatography And Gas Chromatography Mass Spectroscopy As An Analytical Method., Tuesday James
Student Theses
Cocaine is derived from the Erythroxylum coca plant, is a highly addictive stimulant abused all over the world. There are two types of Erythroxylum coca plants that produce cocaine; the E. Coca and E. Novogranatense. Cocaine exists as the salt, and the freebase which is typically referred to as “crack” due to the crackling sound it makes when heated. It is popular because it is inexpensive and easily available on the streets, mainly in poor urban areas. The purpose of this project was to determine the amount of cocaine that can be extracted from E.coca and to assess which analytical …
Novel Nucleoside Analogues With Bases Modified With (Β-Halo)Vinyl Sulfone Or Β-Keto Sulfone As Probes To Study Rna/Dna-Proteins Interactions,
2017
Florida International University
Novel Nucleoside Analogues With Bases Modified With (Β-Halo)Vinyl Sulfone Or Β-Keto Sulfone As Probes To Study Rna/Dna-Proteins Interactions, Sk Md Sazzad Hossain Suzol
FIU Electronic Theses and Dissertations
The C-5 modified pyrimidine analogues are well-known anticancer and antiviral drugs which underscore further development of novel probes to study their physical, chemical, and biological properties. In my dissertation the syntheses and properties of (β-halo)vinyl sulfone and/or (β-keto)sulfone analogues of C-5 modified pyrimidine have been discussed. In the first part of the dissertion, the synthesis of 5-(β-halo)vinyl sulfones either by transition metal-catalyzed or iodine-mediated halosulfonylation reaction of 5-acetylene pyrimidine nucleosides have been explored. The novel (β-chloro/bromo/iodo)vinyl sulfones efficiently undergo addition-elimination reaction with different nucleophiles such as thiols, amines, amino acid, peptides to provide (β-substituted)vinyl sulfone analogues. The rate of these …
Toward The Synthesis Of Naphthalene-Bridged Bis-Triazole Bimetallic Complexes,
2017
University of South Florida
Toward The Synthesis Of Naphthalene-Bridged Bis-Triazole Bimetallic Complexes, Sean M. Johnson
USF Tampa Graduate Theses and Dissertations
Bimetallic complexes are known to have unique electronic properties and are used in a variety of organic transformations as catalysts. The use of naphthalene-bridged bis- triazoles (NBT) for bimetallic complexes is unknown. NBTs have the unique property of being fluorescent stemming from a twisted intramolecular charge transfer. With the non- coplanar geometry and the distance between the 1,2,3-triazole rings, we hypothesized that 1,8-bis(4-phenyl-2H-1,2,3-triazol-2-yl)naphthalene (12) would be a suitable ligand to synthesize a bimetallic complex. The synthesis of 12 was optimized for large scale synthesis and was synthesized on a 78 mmol scale in 15% total yield. Metal complexation …
