Preparations are reported for an extensive series of phosphate salts of polyammonium species from the corresponding halide salts. The phosphate salts, as anhydrous materials, are liquid at or near room temperature. Three approaches for the preparation of these materials are noted, including treatment with aqueous hexafluorophosphoric acid, classical ion exchange methods, and treatment with 85% phosphoric
Tellurium complex polyhalides: narrow bandgap photoactive materials for electronic applications
作者:Artyom V. Novikov、Andrey N. Usoltsev、Sergey A. Adonin、Andrey A. Bardin、Denis G. Samsonenko、Gennady V. Shilov、Maxim N. Sokolov、Keith J. Stevenson、Sergey M. Aldoshin、Vladimir P. Fedin、Pavel A. Troshin
DOI:10.1039/d0ta06301k
日期:——
intrinsic and environmental stability of the commonly used halide-based absorbers causes a demand for more stable photoactive materials. In this work, we report a novel family of tellurium complex polyhalides with the composition A2TeBr6I2. The crystal structure of these compounds contains [TeBr6]2- octahedra interconnected by I2 bridge-molecules via halogen bonding. They are narrow bandgap semiconductors
Acetylcholinesterase inhibitors are currently of high interest due to the many reasons. Among them, Alzheimers disease drugs are of great interest. In this study, eleven monoquaternary pyridinium salts substituted by different groups (electron donors and electron acceptors) in position four were prepared. Then, their anticholinesterase activity was tested. As observed, their IC50s ranged from 33 μM to 3981 μM. Moreover, probability of blood-brain barrier penetration was predicted.
Menschutkin reactions of bicyclic aliphatic amines and of pyridine derivatives with methyl iodide. Extended Brönsted treatements and isokinetic relationships in acetonitrile–methanol
The rate constants, activation parameters for the Menschutkinreactions for five bases with methyliodide, and the enthalpies of solution for the relevant species of the reactions have been determined in acetonitrile-methanol. The bases are quinuclidine, 1,4-diazabicyclo[2.2.2]octane, and 4-cyano-, 4-t-butyl-, and 4-dimethylamino-pyridine. The coefficients of empirical energy correlations defined in
title compound, [(DMNP)4SiW12O40·2DMF] (DMNP=4-dimethylamino-1-methyl-pyridylammonium; DMF = N, N-dimethyl formamide) has been synthesized from (TBA)4SiW12O40 (TBA- =tetrabutylammonium) and DMNP iodide in acetonitrile. The compound crystallized in P21/n space group from DMF solution, and was characterized by elemental analysis, XPS study, IR, ESR and electronic spectra. X-raystructure analysis confirmed