24959-67-9Relevant academic research and scientific papers
Mobilities of negative halogen ions in various gases
Fujii, T.,Meisels, G. G.
, p. 5067 - 5069 (1981)
The mobilities of SF6- in He and of F-, Cl-, Br-, and I- in Ar, Xe, H2, N2, CO, and CH4, have been investigated over the field-strength (E/P) range of 5 to 25 V/cm Torr using time-resolved high pressu
A novel polyoxometalate-encapsulating 3D polycatenated metal-organic framework
Li, Shaobin,Lu, Borong,Xin, Jianjiao,Zhang, Li,Pan, Jing,Chen, Yue,Tan, Xiaoguo
, (2019/08/20)
A novel polyoxometalate-encapsulating polycatenated metal-organic framework, (bib)0.5[Cu2(bib)3.5(GeW12O40)]·H2O (1) (bib = 1,4-bis(1-imidazol-yl)-2,5-dimethyl benzene), has been synthesize
Pt embedded in carbon rods of N-doped CMK-3 as a highly active and stable catalyst for catalytic hydrogenation reduction of bromate
Li, Minghui,Hu, Yuan,Fu, Heyun,Qu, Xiaolei,Xu, Zhaoyi,Zheng, Shourong
supporting information, p. 11786 - 11789 (2019/10/02)
A novel Pt-based catalyst with fine and homogeneous Pt particles embedded in carbon rods of N-doped CMK-3 was fabricated by a two-step infiltration method using SBA-15 as the template. Due to its fine particle size, N-containing functionality and effective embedment of Pt particles in carbon rods, the catalyst exhibited superior catalytic activity and stability in the liquid phase catalytic hydrogenation of bromate in water.
Palladium nanoparticles encapsulated in core-shell silica: A structured hydrogenation catalyst with enhanced activity for reduction of oxyanion water pollutants
Wang, Yin,Liu, Jinyong,Wang, Peng,Werth, Charles J.,Strathmann, Timothy J.
, p. 3551 - 3559 (2015/02/19)
Noble metal nanoparticles have been applied to mediate catalytic removal of toxic oxyanions and halogenated hydrocarbons in contaminated water using H2 as a clean and sustainable reductant. However, activity loss by nanoparticle aggregation and
Reaction of Br2 with adsorbed CO on Pt, studied by the surface interrogation mode of scanning electrochemical microscopy
Wang, Qian,Rodriguez-Lopez, Joaquin,Bard, Allen J.
, p. 17046 - 17047 (2010/03/25)
(Chemical Equation Presented) Scanning electrochemical microscopy surface interrogation (SI-SECM) in the cyclic voltammetry mode was successfully used to detect and quantify adsorbed CO on a Pt electrode by reaction with electrogenerated Br2. T
Simultaneous evaluation of different types of kinetic traces of a complex system: Kinetics and mechanism of the tetrathionate - bromine reaction
Varga, Denes,Horvath, Attila K.
, p. 9988 - 9996 (2010/02/16)
The bromine-tetrathionate reaction has been studied in the presence of phosphoric acid/dihydrogen phosphate buffer at T = 25 ± 0.1°C and at I = 0.5 M ionic strength with both stopped-flow technique and a conventional diode array spectrophotometer. The sto
Kinetics and mechanism of oxidation of some thioacids by benzyltrimethylammonium chlorobromate
Tiwari, Vandana,Kumbhani,Shastri,Sharma, Vinita
, p. 1520 - 1523 (2009/05/16)
The oxidation of some thioacids, viz., thioplycollic, thiolactic and thiomalic acids by benzyltrimethylammonium chlorobromate (BTMACB) has been studied in acetic acid. The reaction is first order with respect to BTMACB. Michaelis-Menten type of 'kinetics have been observed with respect to the reductants. The reaction has been studied in solvents of different compositions of acetic acid and water. The solvent composition effect has been analysed using Grunwald-Weinstein equation. A mechanism involving the formation of an intermediate complex in the pre-equilibrium and its subsequent decomposition in slow step has been proposed.
Kinetics and mechanisms of S(IV) reductions of bromite and chlorite ions
Huff Hartz, Kara E.,Nicoson, Jeffrey S.,Wang, Lu,Margerum, Dale W.
, p. 78 - 87 (2008/10/08)
The reaction of bromite with aqueous S(IV) is first order in both reactants and is general-acid catalyzed. The reaction half-lives vary from 5 ms (p[H+] 5.9) to 210 s (p[H+] 13.1) for 0.7 mM excess S(IV) at 25°C. The proposed mechanism includes a rapid reaction (k1 = 3.0 × 107 M-1 s-1) between BrO2- and SO32- to form a steady-state intermediate, (O2BrSO3)3-. General acids assist the removal of an oxide ion from (O2BrSO3)3- to form OBrSO3-, which hydrolyzes rapidly to give OBr- and SO42-. Subsequent fast reactions between HOBr/OBr- and SO32- give Br- and SO42- as final products. In contrast, the chlorite reactions with S(IV) are 5-6 orders of magnitude slower. These reactions are specific-acid, not general-acid, catalyzed. In the proposed mechanism, ClO2- and SO3H-/SO2 react to form (OClOSO3H)2- and (OClOSO2)- intermediates which decompose to form OCl- and SO42-. Subsequent fast reactions between HOCl/OCl- and S(IV) give Cl- and SO42- as final products. SO2 is 6 orders of magnitude more reactive than SO3H-, where k5(SO2/ClO2-) = 6.26 × 106 M-1 s-1 and k6(SO3H-/ClO2-) = k6(SO3H-/ClO2-) = 5.5 M-1 s-1. Direct reaction between ClO2- and SO32- is not observed. The presence or absence of general-acid catalysis leads to the proposal of different connectivities for the initial reactive intermediates, where a Br-S bond forms with BrO2- and SO32-, while an O-S bond forms with ClO2- and SO3H-.
Photo-response of the bromate-sulfite chemical oscillator with tris-(bipyridine)ruthenium(II) as a catalyst
Matsuyama,Okazaki,Tanimoto,Hanazaki
, p. 372 - 376 (2008/10/08)
Photo-response of the chemical oscillator composed of BrO3-, SO32- and Ru(bpy)32+ in the acidic aqueous solution was examined in a flow system. After establishing the dark state diagram, state diagrams have been determined taking P (the illumination light power) as one of the external parameters. In the P versus [SO32-] plane, the bifurcation between the reduced steady state and the oscillatory or oxidized steady state was found to be independent of P, occurring at a fixed critical concentration of SO32-. Qualitative discussions are given for this and other characteristic features in the system containing SO32- as a reductant.
Synthesis, properties and crystal structure of some polyoxometallates containing the tris(hydroxymethyl)-aminomethane cation
Bi, LiHua,Wang, EnBo,Xu, Lin,Huang, RuDan
, p. 163 - 171 (2008/10/08)
Polyoxometallates [(CH2OH)3CNH3]3PMo12O40·5H2O, [(CH2OH)3CNH3]3PW12O40·11H2O, [(CH2OH)3CNH3]2H2SiW12O40·10H2O, [(CH2OH)3CNH3]4GeW12O40·9H2O, [C4H12NO3]4SiMo12O40·5H2O, [(CH2OH)3CNH3]2H4P2W18O62·3H2O and [(CH2OH)3CNH3]3H3As2W18O62·4H2O have been synthesized for the first time, purified, and structurally characterized by means of elemental analyses, IR spectrum, electronic spectrum, cyclic voltammogram, 31P NMR and X-ray diffraction. The crystal structure of [(CH2OH)3CNH3]4PMo12O40·5H2O has been determined by X-ray diffraction. Hydrogen bonding between (CH2OH)3CNH2 and PMo12O40/3- was inferred from heavy atom distances. The solid reflectance electronic spectra and IR spectra indicate that there is interaction between the H3PMo12O40 and the organic substrate. The complexes have photosensitivity under irradiation of sunlight to result in charge transfer by oxidation of (CH2OH)3CNH2 and the reduction of the polyoxometallates. We also found that [(CH2OH)3CNH3]3PMo12O40·5H2O and [(CH2OH)3CNH3]3 PW12O40·11H2O exhibited substantial catalytic activity toward the electro-reduction of bromate and nitrite, respectively. (C) 2000 Elsevier Science S.A.
