Spectral luminescent properties and dynamics of intramolecular processes in 2,4,5-triarylimidazoles

Femtochemistry of salicylideneaminospironaphthoxazines, bifunctional photochromic compounds

“…Stim ulated emission was always observed in the systems with ESIPT, if the equilibrium in the ground electronic state of the reactant was essentially shifted toward the enol form. 7,12, 14 Apparently, absorption of a light quantum at 350 nm can not initiate a sequence including the photochromic spiro ring opening and ESIPT in the bifunctional mole cule, because experiments on control of the yield of pho toproducts revealed a large variation of the band intensity ratio of corresponding reaction products while the band shapes remained unchanged, as if the bands corresponded to different molecules. Therefore, we assumed that reac tion products are formed in concurrent, competing pro cesses of proton transfer or cleavage of the spiro bonds in the excited reactant molecules.…”

“…14 The carrier wavelength of excitation pulses was 400 nm. The pulse energy was varied using a half wave plate and a polarizer.…”

Eco-Friendly and Facile Synthesis of Substituted Imidazoles via Nano Zirconia Catalyzed One-Pot Multicomponent Reaction of Isatin Derivatives with Ammonium Acetate and Substituted Aromatic Aldehydes under Solvent Free Conditions

“…Imidazole derivatives are mostly used as organic resources [6,7] and it also plays important roles in various types of biological activities [8,9]. This multitalented applicability of Imidazole draws attention towards the importance of access to efficient synthetic routes to well-designed and highly substituted imidazole derivatives.…”

Simple and Efficient Method for the Synthesis of Highly Substituted Imidazoles Catalyzed by Benzotriazole

“…Recent advances in green chemistry and organometallic chemistry have extended the boundary of imidazole to the synthesis and application of a large class of imidazoles as ionic liquids and imidazole related N‐heterocyclic carbenes . In addition, the optical properties (fluorescence and chemiluminescence) of imidazole derivatives are of particular concern for material scientists. Because of their wide range of biological, synthetic, and potential industrial applications, synthesis imidazoles, especially high substituted imidazoles, have received a great deal of attention.…”