Boosting Proton Conductivity in Highly Robust 3D Inorganic Cationic Extended Frameworks through Ion Exchange with Dihydrogen Phosphate Anions

2015 ◽  
Vol 21 (49) ◽  
pp. 17591-17595 ◽  
Author(s):  
Chengliang Xiao ◽  
Yaxing Wang ◽  
Lanhua Chen ◽  
Xuemiao Yin ◽  
Jie Shu ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Proton Conductivity ◽  
Dihydrogen Phosphate ◽  
Phosphate Anions

ChemInform Abstract: Boosting Proton Conductivity in Highly Robust 3D Inorganic Cationic Extended Frameworks Through Ion Exchange with Dihydrogen Phosphate Anions.

ChemInform ◽  
2016 ◽  
Vol 47 (10) ◽  
pp. no-no
Author(s):  
Chengliang Xiao ◽  
Yaxing Wang ◽  
Lanhua Chen ◽  
Xuemiao Yin ◽  
Jie Shu ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Proton Conductivity ◽  
Dihydrogen Phosphate ◽  
Phosphate Anions

Morphology evolution of α-Fe2O3 nanoparticles: the effect of dihydrogen phosphate anions

CrystEngComm ◽  
2011 ◽  
Vol 13 (24) ◽  
pp. 7293 ◽  
Author(s):  
Baoliang Lv ◽  
Yao Xu ◽  
Dong Wu ◽  
Yuhan Sun
Keyword(s):  
Dihydrogen Phosphate ◽  
Morphology Evolution ◽  
Fe2o3 Nanoparticles ◽  
Phosphate Anions

scholarly journals Exploring the Effects of Various Polymeric Backbones on the Performance of a Hydroxyaromatic 1,2,3-Triazole Anion Sensor

Sensors ◽  
2020 ◽  
Vol 20 (10) ◽  
pp. 2973
Author(s):  
Aikohi Ugboya ◽  
Khristal Monroe ◽  
Unodinma Ofulue ◽  
Kayley Yates ◽  
Debanjana Ghosh ◽  
...  
Keyword(s):  
Dihydrogen Phosphate ◽  
Anion Sensor ◽  
Absorption And Fluorescence Spectroscopy ◽  
Uv Illumination ◽  
Acid Methyl ◽  
Phosphate Anions ◽  
Tunable Mechanical Properties ◽  
Spectroscopy Studies ◽  
Derivatives Of ◽  
Higher Sensitivity

Polymeric chemosensors are vital sensing tools because of higher sensitivity compared to their monomeric counterparts and tunable mechanical properties. This study focuses on the incorporation of a hydroxyaromatic 1,2,3-triazole sensor, 2-(4-phenyl 1H-1,2,3-triazol-1-yl)phenol (PTP), into polymers. By itself, the triazole has a selective, fluorometric response to the fluoride, acetate, and dihydrogen phosphate anions, and is most responsive to fluoride. Current investigations probe the suitability of various polymeric backbones for the retention and enhancement of the triazole’s sensing capabilities. Backbones derived from acrylic acid, methyl methacrylate, divinylbenzene, and styrene were explored. UV-illumination, Nuclear Magnetic Resonance (NMR) titration, and ultraviolet-visible (UV-Vis) absorption and fluorescence spectroscopy studies are used to investigate the performance of newly synthesized polymers and the derivatives of PTP that serve as the polymers’ precursors. Among the polymers investigated, copolymers with styrene proved best; these systems retained the sensing capabilities and were amenable to tuning for sensitivity.

scholarly journals Synthesis of Tris-pillar[5]arene and Its Association with Phenothiazine Dye: Colorimetric Recognition of Anions

Molecules ◽  
2019 ◽  
Vol 24 (9) ◽  
pp. 1807 ◽  
Author(s):  
Alena Khadieva ◽  
Vladimir Gorbachuk ◽  
Dmitriy Shurpik ◽  
Ivan Stoikov
Keyword(s):  
Hydrogen Bond ◽  
1H Nmr Spectroscopy ◽  
Color Change ◽  
Amide Group ◽  
Anion Binding ◽  
Dihydrogen Phosphate ◽  
Imino Group ◽  
Colorimetric Probe ◽  
Arene Complex ◽  
Phosphate Anions

A multicyclophane with a core based on tris(2-aminoethyl)amine (TREN) linked by amide spacers to three fragments of pillar[5]arene was synthesized. The choice of the tris-amide core allowed the multicyclophane to bind to anion guests. The presence of three terminal pillar[5]arene units provides the possibility of effectively binding the colorimetric probe N-phenyl-3-(phenylimino)-3H-phenothiazin-7-amine (PhTz). It was established that the multicyclophane complexed PhTz in chloroform with a 1:1 stoichiometry (lgKa = 5.2 ± 0.1), absorbing at 650 nm. The proposed structure of the complex was confirmed by 1H-NMR spectroscopy: the amide group linking the pillar[5]arene to the TREN core forms a hydrogen bond with the PhTz imino-group while the pillararenes surround PhTz. It was established that the PhTz:tris-pillar[5]arene complex could be used as a colorimetric probe for fluoride, acetate, and dihydrogen phosphate anions due to the anion binding with proton donating amide groups which displaced the PhTz probe. Dye displacement resulted in a color change from blue to pink, lowering the absorption band at 650 nm and increasing that at 533 nm.

scholarly journals POLY-1-VINYL-1,2,4-TRIAZOLE AND PHENOL-2,4-DISULFONIC ACID COMPLEX AS THE BASIS OF ION-EXCHANGE MEMBRANE FOR FUEL CELLS

2021 ◽  
Vol 1 (1) ◽  
pp. 13-14
Author(s):  
Anastasiya Bel'kovich ◽  
Oksana Lebedeva
Keyword(s):  
Fuel Cells ◽  
Ion Exchange ◽  
Proton Conductivity ◽  
Polymer Membrane ◽  
Ion Exchange Membrane ◽  
Disulfonic Acid ◽  
Hydrogen Fuel Cells ◽  
Hydrogen Fuel ◽  
Acid Complex ◽  
Exchange Membrane

In this study, the properties of the polymer membrane for hydrogen fuel cells were investigated.The membrane was based on poly-1-vinyl-1,2,4-triazole and phenol-2,4-disulfonic acid in three stoichiometric ratios. The highest proton conductivity index was demonstrated by the PVT-FDSA sample (10:90% wt.) – 5.98·10-2 S/cm.

Preparation of Highly Stable Ion Exchange Membranes by Radiation-Induced Graft Copolymerization of Styrene and Bis(vinyl phenyl)ethane Into Crosslinked Polytetrafluoroethylene Films

2006 ◽  
Vol 4 (1) ◽  
pp. 56-64 ◽  
Author(s):  
Tetsuya Yamaki ◽  
Junichi Tsukada ◽  
Masaharu Asano ◽  
Ryoichi Katakai ◽  
Masaru Yoshida
Keyword(s):  
Ion Exchange ◽  
Proton Conductivity ◽  
Water Uptake ◽  
Graft Copolymerization ◽  
Exchange Capacity ◽  
Polymer Electrolyte Fuel Cells ◽  
Ion Exchange Membranes ◽  
Aromatic Rings ◽  
Ion Exchange Capacity ◽  
Radiation Induced

We prepared novel ion exchange membranes for possible use in polymer electrolyte fuel cells (PEFCs) by the radiation-induced graft copolymerization of styrene and new crosslinker bis(vinyl phenyl)ethane (BVPE) into crosslinked polytetrafluoroethylene (cPTFE) films and subsequent sulfonation and then investigated their water uptake, proton conductivity, and stability in an oxidizing environment. In contrast to the conventional crosslinker, divinylbenzene (DVB), the degree of grafting of styrene∕BVPE increased in spite of high crosslinker concentrations in the reacting solution (up to 70mol%). Quantitative sulfonation of the aromatic rings in the crosslinked graft chains resulted in the preparation of membranes with a high ion exchange capacity that reached 2.9meq∕g. The bulk properties of the membranes were found to exceed those of Nafion membranes except for chemical stability. The emphasis was on the fact that the BVPE-crosslinked membranes exhibited the higher stability in the H2O2 solution at 60°C compared to the noncrosslinked and DVB-crosslinked ones, as well as decreased water uptake and reasonable proton conductivity. These results are rationalized by considering the reactivity between styrene and the crosslinker, which is an important factor determining the distribution of the crosslinks in the graft component. In the case of BVPE, the crosslinks at a high density were homogeneously incorporated even into the interior of the membrane because of its compatibility with styrene while the far too reactive DVB led to a crosslink formation only near the surface. The combination of both the cPTFE main chain and BVPE-based grafts, i.e., a perfect “double” crosslinking structure, is likely to effectively improve the membrane performances for PEFC applications.

Controlled Diffusion of Photoswitchable Receptors by Binding Antielectrostatic Phosphate Oligomers

2020 ◽  
Author(s):  
Thomas MacDonald ◽  
Ben L. Feringa ◽  
William S. Price ◽  
Sander J. Wezenberg ◽  
Jonathon Beves
Keyword(s):  
Molecular Transport ◽  
External Control ◽  
Dihydrogen Phosphate ◽  
Anion Receptors ◽  
Effective Volume ◽  
New Approach ◽  
Controlled Diffusion ◽  
Diffusion Nmr ◽  
Hydrogen Bonding Interactions ◽  
Phosphate Anions

Dihydrogen phosphate anions are found to spontaneously associate into anti-electrostatic oligomers via hydrogen bonding interactions at millimolar concentrations in DMSO. Diffusion NMR measurements supported formation of these oligomers, which can be bound by photoswitchable anion receptors to form large bridged assemblies of approximately three times the volume of the unbound receptor. Photoisomerization of the oligomer-bound receptor causes a decrease in diffusion coefficient of up to 16%, corresponding to a 70% increase in effective volume. This new approach to external control of diffusion opens prospects in controlling molecular transport.

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