Solvatochromic studies on 2-[(2-hydroxypheny)azo]-4-5-diphenylimidazole

Solvent effect on the steady-state fluorescence anisotropy of two-photon absorbing fluorene derivatives

“…The dependences of r 0 and corresponding angles b on solvent polarity Df for 1-3 are presented in Figs. [10][11][12][13][14][15]. From these dependences, one can see that the angles b between the absorption and emission transition dipole moments decrease in polar solvent by more than a factor of two (Figs.…”

“…The interaction of solute with surrounding solvent depends on the nature of arising forces (specific, such as hydrogen bonding, and/or nonspecific, universal interactions [8]), which are determined by charge distribution and polarizability of the solvent and solute molecules [1,9]. Considerable changes in the energy of solvated solute molecules may occur with changes in the solvent, especially in polar media [10,11]. All these phenomena are complex, and there is no single theory which accounts for all such effects.…”

Reviewing of Synthesis and Computational Studies of Pyrazolo Pyrimidine Derivatives

“…The transfer of the hydrogen atom related to N4 either to the keto-oxygen (O8) or to N11 creates annular and azo-hydrazone tautomerism, respectively. In addition, it is wellknown that a variety of azo dyes can co-exist in acid-base equilibrium particularly in basic solvents [82][83][84].…”

Unprecedented Coordination-Induced Bright Red Emission from Group 12 Metal-Bound Triarylazoimidazoles

“…Following our interest in azo dyes and photochromic materials [ 17 , 18 , 23 ], we turned our attention to triarylazoimidazoles and their metal complexes. Surprisingly, triarylazoimidazoles received almost no attention in the literature [ 24 , 25 , 26 , 27 ]. Therefore, exploration of their coordination chemistry, photophysics or photochemistry and cytotoxicity seemed as an attractive niche.…”