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.

Triplet sensitized photoisomerization of several stilbenes included within a water-soluble organic capsule has been investigated. In this study octa acid that self assembles in the presence of hydrophobic guest molecules to form a host-guest complex is utilized to solubilize hydrophobic stilbenes and triplet sensitizers in water, and to provide confinement during the geometric isomerization of ...

We have studied the kinetics of trans to cis isomerization under the illumination of ultraviolet light, in the Langmuir monolayer of mesogenic azobenzene dimer, bis-[5-( 4' -n-dodecyloxy benzoyloxy)-2-( 4''-methylphenylazo)phenyl] adipate, at an air-water interface. We find that the trans to cis isomerization reaction of the molecules in the monolayer shows deviation from the first-order kineti...

Quantum coherence and its dephasing or relaxation by coupling to an environment plays an important role in nonadiabatic transition, photoexcitation and tunneling processes as well as ultrafast nonlinear spectroscopies. I first introduce a systembath model to explain how fluctuation and dissipation arises from the environment, and the concept will be illustrated with some examples from chemistry...

The reversible photoisomerization of azobenzenes has been extensively studied to construct systems with optical responsiveness; however, this process limits the luminescence these compounds. Recently, there have many efforts design and synthesize fluorescent azobenzene compounds, such as inhibition electron transfer, inducing aggregation, metal-enhancement, which make materials ideal for applic...

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.