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.

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.

scholarly journals Crystal structure of 4-sulfamoylanilinium dihydrogen phosphate

2014 ◽  
Vol 70 (9) ◽  
pp. o997-o998
Author(s):  
C. Muthuselvi ◽  
N. Mala ◽  
N. Srinivasan ◽  
S. Pandiarajan ◽  
R. V. Krishnakumar
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Benzene Ring ◽  
Three Dimensional ◽  
Dihydrogen Phosphate ◽  
Oh Groups ◽  
Dimensional Network ◽  
Amine Hydrogen ◽  
Phosphate Anions ◽  
Molecular Salt

In the crystal structure of the title molecular salt, C6H9N2O2S+·H2PO4−, the sulfomylalinium cations and the dihydrogen phosphate anions form independent [100] chains through Ns—H...O (s = sulfamoyl) and O—H...O hydrogen bonds, respectively. The chains are cross-linked by Na—H...O (a = amine) hydrogen bonds, generating (010) sheets. Two C—H...O hydrogen bonds involving diametrically opposite C atoms in the benzene ring of the cation as donors form chains parallel to [202] in which P=O and P—OH groups are acceptors. Together, these interactions lead to a three-dimensional network.

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

scholarly journals 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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