Photophysical behavior of some thymol based schiff bases using absorption and fluorescence spectroscopy

Photophysical properties and fluorosolvatochromism of D–π–A thiophene based derivatives

“…Over the last decade, solvent dependent photophysical properties for a variety of chemical structures still found interest in literature. [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46] The present work reports the spectral behaviour of a couple of thiophene-based compounds of D-p-A type, with the same structure and different electron donating groups, namely 2-uoro-4-(5-(4-methoxyphenyl)thiophen-2-yl)benzonitrile (MOT) and 4-(5-(4-(dimethylamino)phenyl)thiophen-2-yl)-2-uorobenzonitrile (DMAT). Solvent effect on their photophysical properties are to be studied and accordingly the dipole moment difference between the ground and excited states (Dm) can be evaluated.…”

Synthesis and Studies on Photophysical Properties of Rhodamine Derivatives for Bioimaging Applications

“…Moreover, the fluorescence band is affected by changing the solvent polarity . While relating these three derivatives and its fluorescence emission response against series of solvent reveals that, RHB2 derivative shows maximum fluorescence emission intensity as compared with RHB1 and RHB3 , except in DCM solvent as shown in Figure .…”

“…This band assigned to the S 1 ! [31][32][33][34] While relating these three derivatives and its fluorescence emission response against series of solvent reveals that, RHB2 derivative shows maximum fluorescence emission intensity as compared with RHB1 and RHB3, except in DCM solvent as shown in Figure 2. In all three compounds, the effect of the solvent polarity on the emission spectra was more prominent than absorption spectrum, it is due to the intramolecular charge transfer (ICT) effect.…”

Supramolecular assembly of amphiphilic platinum(ii) Schiff base complexes: diverse spectroscopic changes and nanostructures through rational molecular design and solvent control

“…Similar spectral assignments have also been made. 30,32 Upon excitation at l = 480 nm, complexes 1-6 exhibit phosphorescence at 641 to 654 nm in degassed DMSO solution, which originates from the 3 MLCT excited state, mixed with 3 LC[lone pair(phenoxide) / p*(imine)] excited state character (Fig. 2b).…”

“…S14-S18 †), as observed from a bathochromic shi in the emission spectra of 2-6 with increasing solvent polarity under degassed conditions, suggesting the charge transfer character of the excited state. 32,33 Computational studies Density functional theory (DFT) optimization and timedependent density functional theory (TDDFT) calculations were employed to investigate the electronic structure and the nature of the absorption origins of complexes 1-6. By truncating the exible tails to methoxy groups (R 1 , R 2 = OMe), the model complex 7 was obtained, on which geometry optimization calculations were performed (Fig.…”