Excited-state dipole moments of some hydroxycoumarins, extensively used as laser dyes,
have been determined using the solvatochromic method based on the microscopic solvent …

Abstract Effect of solvents of varying polarities on absorption and fluorescence spectra and
dipole moment of laser dye: 7-diethylamino-3-thenoylcoumarin (DETC) has been …

Fluorescence quenching of 4-methyl-7-methoxy coumarin (1) and 4-methyl-5-ethoxy-7-
methoxy coumarin (2) in aqueous solutions have been studied at different concentrations of …

The fluorescence quenching of 5-chloro-2-methoxyphenylboronic acid (5CMPBA) and 4-
fluoro-2-methoxyphenyl boronic acid (4FMPBA) has been studied at room temperature by …

Absorption and fluorescence emission of 4 and 7 substituted coumarins viz. C 440, C 490, C
485 and C 311 have been studied in various polar and non-polar organic solvents. These …

The magnitude of the Stokes shift (frequency shifts in absorption and fluorescence spectra)
is observed on changing the solvents and further has been used to calculate experimentally …

In the present work an array of novel substituted 2H-chromen-2-one (coumarin) derivatives
has been subjected to photophysical analysis. Though the influence of the electron-donating …

The infrared spectrum of monomeric unsubstituted coumarin (C9H6O2; 2H‐1‐benzopyran‐2‐
one), isolated in solid argon at 10 K is presented and assigned. The UV‐induced (λ> 200 …

Résumé The optical properties of two new iminocoumarin dyes, bearing a cyano group at
the 3-position and an N-diethylamino group at the 7-position, were studied by UV–vis …

The change of the emission properties of a coumarin derivative, 3-carboxy-5, 6-
benzocoumarin in the presence of five aromatic amines was studied by means of steady …