Results 191 to 200 of about 4,190 (237)

Bis(difluoroaluminum)organophosphonates and difluoroaluminumdiorganophosphinates

Journal of Polymer Science: Polymer Chemistry Edition, 1984
AbstractOligomers and polymers of the general types [RR′P(O)OA1F2]n, I, and [F2AlOP(R)(O)OAlF2]n, II, were prepared by the addition of phosphonic or phosphinic acids and hydrogen fluoride to etherated alanes. The hydrocarbon moieties (R,R′) on the phosphonic and phosphinic acids were important determinants of physical and chemical properties.
Edward E. Flagg, Donald L. Schmidt
openaire   +1 more source

Degradation of organophosphonates by Penicillium citrinum

Letters in Applied Microbiology, 1992
Utilization of organophosphonates as the sole source of phosphorus, carbon or nitrogen by a soil isolate of Penicillium citrinum was studied. Penicillium citrinum was found to utilize 2-aminoethylphosphonic and 2-oxoalkylphosphonic acids as the sole phosphorus source whereas 1-hydroxyalkylphosphonates as well as 1-aminoalkylphosphonates and their ...
E. Zboińska, I. Maliszewska, B. Lejczak, P. Kafarski   +3 more
openaire   +1 more source

Proton conductivity at the controlled hydrophilic and hydrophobic surfaces of mesoporous aluminum organophosphonates

Journal of Materials Chemistry A
Aluminum organophosphonate (AOP)-type mesoporous materials were prepared using Pluronic P123, clearly demonstrating temperature-dependent control of the proton/water transport rate and the mechanism by adjusting the kind of organic linker.
T. Ami, Kouki Oka, Hitoshi Kasai, Tatsuo Kimura   +3 more
semanticscholar   +1 more source

Organophosphonic acids as drug candidates

Expert Opinion on Therapeutic Patents, 2006
The discovery of phosphate mimetics that are suitable as drug candidates has been a challenging problem faced by medicinal chemists for many years. Several series of organophosphonic acids have been identified as phosphate mimetics and have resulted in multiple development candidates progressing to the clinic and even successfully reaching the market ...
openaire   +1 more source

Intrinsic Specific Activity Enhancement for Bifunctional Electrocatalytic Activity toward Oxygen and Hydrogen Evolution Reactions via Structural Modification of Nickel Organophosphonates.

Inorganic Chemistry
A comprehensive knowledge of the structure-activity relationship of the framework material is decisive to develop efficient multifunctional electrocatalysts.
Poojita, Tanmay Rom, Rathindranath Biswas, K. Haldar, A. Paul   +4 more
semanticscholar   +1 more source

Catabolism of organophosphonates: biochemistry, physiology and interactions of degrading bacteria in the environment

, 2020
The major contribution of microorganisms in metabolism of natural and synthetic phosphonates, the biochemical bases of these processes and possible interactions between degrading bacteria in natural and anthropogenic ecosystems are presented in the light
I. Ermakova, A. Leontievsky, A. Sviridov, T. Shushkova, D. Epiktetov   +4 more
semanticscholar   +1 more source

Radical-based dephosphorylation and organophosphonate biodegradation

Journal of the American Chemical Society, 1987
Products resulting from the degradation of organophosphonates by Escherichia coli are identified and used as a basis for evaluating mechanisms which may be the chemical basis of the biodegradation. One mechanistic hypothesis which is consistent with the biodegradation products involves radical-based dephosphorylation.
J. W. Frost, S. Loo, M. L. Cordeiro, D. Li   +3 more
openaire   +1 more source

Isomeric Benzenediol-Linked Organophosphonates as a Handy Reusable Emitting Platform: Diversity in Polyamine Vapor Detection.

Journal of Organic Chemistry
This work introduces metal/column-free facile quantitative access to conformationally twisted catechol-linked organophosphonate (CAP) as a blue-emitting solid that could reversibly detect only 1,3-diaminopropane (DAP) and 1,2-ethylenediamine (EDA) vapors,
Akshita Jain, P. Sivasakthi, P. K. Samanta, M. Chakravarty   +3 more
semanticscholar   +1 more source

Organophosphonate derivatives of titanium and niobium alkoxoanions

Journal of Organometallic Chemistry, 1998
The organophosphonate-substituted alkoxides [Bu4nN]2[{Ti(OMe)3(O3PPh)}2] (1) and [Bu4nN]2[{Nb(OMe)3(O3PPh)}2(μ-O)] (2) were prepd. from [Bu4nN][PhPO3H] and the metal alkoxides Ti(OMe)4 or Nb(OMe)5 resp. 1 And 2 were characterized by x-ray crystallog. (1·PhMe: monoclinic, space group C2, R = 0.0449; 2: monoclinic, space group P21/n, R = 0.0452).
Errington, R John, Ridland, John, Willett, Kathryn J, Clegg, William, Coxall, Robert A, Heath, Sarah L   +5 more
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Chapter 15. Metal Organophosphonate Proton Conductors

2011
New ion conducting materials have major applications in new energy technologies. Foremost among these are applications as proton-conducting electrolyte membranes in hydrogen and direct methanol fuel cells and Li ion conductors for batteries. Significant challenges confront candidates for these membranes collectively, with the goal of better cost ...
George K. H. Shimizu, Jared M. Taylor, Karl W. Dawson   +2 more
openaire   +1 more source