Transition-state stabilization and molecular recognition: acceleration of phosphoryl-transfer reactions by an artificial receptor
摘要:
An artificial receptor that is complementary to the proposed trigonal-bipyramidal intermediate for phosphoryl-transfer reactions has been designed. Kinetic measurements with P-31 NMR methods show that the receptor causes up to a 10-fold accleration in the aminolysis of phosphorodiamidic chloride derivatives, proceeding via an associative mechanism.
Liquid crystal display with alignment film of polyphenylenphthalamide-based material and method for fabricating the same
申请人:——
公开号:US20020182346A1
公开(公告)日:2002-12-05
An LCD and a method for fabricating the LCD includes a first substrate and a second substrate, a liquid crystal layer between the first substrate and the second substrate, and a coating of a polyphenylenephthalamide based material on at least one of the substrates, thereby providing an LCD having a reduced residual image, a strong anchoring energy, and a high thermal stability is achieved.
Synthesis, photophysical and electrochemical properties of a new class of fluorescent amidoanthracenophanes
作者:Ayyavoo Kannan、Perumal Rajakumar
DOI:10.1039/c5ra14357h
日期:——
Fluorescent amidoanthracenophanes 1, 2, 3 and 4 were obtained from the various aromatic diacid chlorides and diamino precyclophane by simple acylation. All the synthesized amidoanthracenophanes 1, 2, 3 and 4 show three intense fluorescence bands between 401 and 402, 426 and 429, and at 449 to 451 nm, and exhibit two/three oxidation reduction peaks in the cyclic voltammetry which is characteristic of
Transition-state stabilization and molecular recognition: acceleration of phosphoryl-transfer reactions by an artificial receptor
作者:Paolo Tecilla、Suk Kyu Chang、Andrew D. Hamilton
DOI:10.1021/ja00182a017
日期:1990.12
An artificial receptor that is complementary to the proposed trigonal-bipyramidal intermediate for phosphoryl-transfer reactions has been designed. Kinetic measurements with P-31 NMR methods show that the receptor causes up to a 10-fold accleration in the aminolysis of phosphorodiamidic chloride derivatives, proceeding via an associative mechanism.