Articles you may be interested in Barrier crossing and solvation dynamics in polar solvents: Photoisomerization of transstilbene and E,E diphenylbutadiene in compressed alkanols Viscosity and solvent dependence of lowbarrier processes: Photoisomerization of cisstilbene in compressed liquid solvents Unimolecular reactions in isolated and collisional systems: Deuterium isotope effect in the photo...

A thorough study on the (E) to (Z) photoisomerization of ferulic acid derivatives (esters, amides all types, and ketones) was carried out. At photostationary state, only aliphatic or benzylic tertiary reach a nearly complete conversion isomers into ones, whereas for esters, primary secondary aromatic mixtures (Z)/(E) ranging from 7 : 93 72 28 are observed. Ketones show rather limited photoisome...

The trans-»eis photoisomerization of a series of substituted stilbazolium salts (A t X , At: trans-l-alkyl-4-[4-R-styryl]-pyridinium and -quinolinium, R = CN. H, CH3 and OCH3, X " = T and CIO4) was studied by laser flash photolysis and steady state irradiation measurements. The quantum yields of eis ^ trans photoisomerization (<£c_t and $ t _ c ) and of fluorescence of the trans isomers (f) ...

Photophysical processes of merocyanine 540 (MC540) are studied using picosecond time-resolved emission spectroscopy. The nonradiative rate of MC540 increases from 0.32 × 109 s-1 in dioxane to 8.73 × 109 s-1 in water, i.e., nearly 27 times. This is attributed to the decrease in the barrier of photoisomerization with increase in polarity and the consequent increase in the rate of photoisomerizati...

Two sequential transformations of the orientational structure in nematic liquid crystal droplets containing a dendrimer additive (nanosized macromolecules with light-absorbing azobenzene terminal moieties) under light irradiation in the UV-blue spectral range were investigated. The origin of these transitions is in the change of the boundary conditions due to photoisomerization of the dendrimer...

A molecular motor that has been previously shown to rotate when fueled by electrons through a scanning tunneling microscope tip functionalized with terarylene photochrome fragment on its rotating subunit. Photoisomerization performed under UV irradiation. Variable-temperature 1H NMR and UV–vis studies demonstrate the rotational motion braking action after photoisomerization. The can be reversed...

Light induced isothermal phase transition leading from smectic A* phase to a stable blue phase was achieved via photoisomerization of a chiral diphenylbutadiene based mesogen.

Most known applications of saccharin and saccharyl derivatives and their potential for new uses rely on the thermal and photochemical stability of the saccharyl system. Here, we show that saccharin undergoes structural rearrangement when subjected to a narrow-band ultraviolet irradiation. Monomeric saccharin was isolated in low-temperature argon matrices and its photochemistry was characterized...

Photoisomerization of l,4-diphenyl-l,3-butadiene (DPB), l,6-diphenyl-l,3,5-hexatriene (DPH) and l,8-diphenyl-l,3,5,7-octatetraene (DPO) in polyvinyl alcohol) (PVA) films was studied unter daylight and direct irradiation. The most efficient photoisomerization occurs in the DPB molecule, the smallest among the compounds investigated. For the greatest, DPO, molecule no distinct isomerization was o...