Solvent Polarity and Environment Sensitive Behavior of Coumarin Derivative

Abstract

This paper reports an investigation on ground and excited state preferential solvation index (i.e., δs2) and relative quantum yield of 2‐acetyl‐3H‐benzo[f]chromen‐3‐one (2AHBC) molecule. The title molecule shows negative values of preferential solvation index in the ground state in different binary solvent mixtures, this confirms that molecule under study is preferentially solvated by 1,4‐dioxane (DXN) rather than acetonitrile (ACN). The excited state preferential solvation index is found to be positive which signifies strong predomination of solute–solvent interaction. Synergistic effect is confirmed by the higher values of fluorescence wave maximum in DXN and ACN solvents for 2AHBC. Further, quantum yield of 2AHBC molecule is estimated in solvents of different polarities. It is found that, non‐radiative decay constant is more than the radiative decay constant in all the solvents. This is attributed due to intermolecular forces between hydrogen atoms. Relative quantum yield of 2AHBC is found to be inversely proportional to the polarity of the solvents. This is due to the intermolecular charge transfer and bathochromic effect. Whereas, the influence of viscosity of the solvents on quantum yield of 2AHBC is studied and it is confirmed by the Forster–Hoffmann equation.

Investigation of the Fluorescence Turn-off Mechanism, Genome, Molecular Docking In Silico and In Vitro Studies of 2-Acetyl-3H-benzo[f]chromen-3-one

“…The obtained results were correlated with the literature. 40 − 43 It is observed that the calculated values of encounter distance ( R ) are almost double the kinetic distance ( r ) in all of the binary solvent mixtures. This demonstrates that the present work obeys the sphere of action model 44 and hence confirms the presence of static quenching reactions.…”

“…It signifies that the presence of static quenching is either due to the sphere of action model or the formation of the ground-state complex. 38 − 40 …”

“…However, the S-V plot in the transient method shows linearity in ACN + DXN solvent mixtures. It signifies that the presence of static quenching is either due to the sphere of action model or the formation of the ground-state complex. − …”

Characterization and evaluation of thin films of a polymer reinforced with nanoparticles using the spin coating technique

“…The thin films that were prepared using the spin coating technique are often affected by the solvent used. Even if the solvent used has evaporated, both the temperature and chemical properties of the solvent used will always exert an influence on the spin coated thin films [12][13][14][15][16][17] The fingerprint region is from 600 to 1400 𝑐𝑚 −1 and the functional group region is from 1400 to 4000 𝑐𝑚 −1 .…”

Preparation and Optical Characterization of PMMA Thin Films of C1

“…Since last two decades, polymers are considered as an important aspect in the field of electronics, as it has proved its applicability as semiconducting material and as conducting material for devices like solar cells, transistor, light emitting diodes, actuators, and sensors. [ 1–12 ] There is a growth in interest for optical properties of organic materials. From absorption spectra, the intrinsic parameters for the materials are obtained.…”