نتایج جستجو برای: photoisomerization
تعداد نتایج: 1035 فیلتر نتایج به سال:
Alkali ion-exchanged Y-zeolites significantly enhance asymmetric induction in the photoisomerization of a number of cis-1,2-diphenylcyclopropane derivatives containing a distant chiral auxiliary.
A light-driven [1]rotaxane was prepared conveniently and directly through self-inclusion complexation of an azobenzene-modified beta-CD and Suzuki-coupling capping in aqueous solution, and its photoisomerization was thoroughly investigated.
Highly efficient photoswitching tetranuclear rhenium(I) tricarbonyl diimine complexes with a stilbene-like bridging ligand are reported. The ability to directly populate excited states localized on the bridging ligand is the key for the observed efficient photoisomerization.
Photoisomerization is an important reaction that confers photoresponsive functionality on nanoparticles. Although photoisomerization of molecules forming self-assembled monolayers on two-dimensional surfaces or three-dimensional clusters has been studied, a detailed picture of interactions of molecules undergoing isomerization with nanoparticles is not available. In this paper, we report on the...
Substituted pyrido[3,2-d]pyrimidines are accessible by a reaction sequence consisting of HWE-reaction, Z/E-photoisomerization, and ring closure the pyridine ring. Bis-pyridopyrimidines can be obtained from 7-amino-pyrido[3,2-d]pyrimidines.
Investigating and deciphering the dynamics of photoswitchable foldamers provides a detailed understanding of their photoinduced conformational transitions, resembling similar processes in photoresponsive biomacromolecules. We studied the ultrafast dynamics of the photoisomerization of azobenzene moieties embedded in a foldamer backbone and the resulting conformational helix-coil transition by t...
Understanding how to control reaction dynamics of polyatomic systems by using ultrafast laser technology is a fundamental challenge of great technological interest. Here, we report a Floquet theoretical study of the effect of light-induced potentials on the ultrafast cis-trans photoisomerization dynamics of rhodopsin. The Floquet Hamiltonian involves an empirical 3-state 25-mode model with freq...
A four-coordinate organoboron compound B(ppy)Mes(2) (1, ppy=2-phenylpyridyl, Mes=mesityl) was previously found to undergo reversible photochromic switching through the formation/breaking of a C-C bond, accompanied by a dramatic color change from colorless to dark blue. To understand this unusual phenomenon, a series of new four-coordinate boron compounds based on the ppy-chelate ligand and its ...
Phenylazopyridines are photoisomerizable compounds with high potential to control biological functions with light. We have obtained a series of phenylazopyridines with light dependent activity as negative allosteric modulators (NAM) of metabotropic glutamate receptor subtype 5 (mGlu5). Here we describe the factors needed to achieve an operational molecular photoisomerization and its effective t...
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