Photophysical properties and estimation of ground and excited state dipole moments of 7-diethylamino and 7-diethylamino-4-methyl coumarin dyes from absorption and emission spectra

Abstract

Photophysical properties and estimation of ground and excited state dipole moments of 7-diethylamino and 7-diethylamino-4-methyl coumarin dyes from absorption and emission spectra

MitoBlue: A Nontoxic and Photostable Blue-Emitting Dye That Selectively Labels Functional Mitochondria

“…Application of the Lippert–Mataga model allowed us to calculate the difference between the dipole moments in the ground and the excited states as a measure of the sensitivity to the polarity. 25 − 28 The resulting value of Δμ = 7.8 D is of the same order as those measured for most environment-sensitive fluorophores, such as NBD (Δμ = 3.6) 29 or 6-DMN (Δμ = 5.5), 30 and accounts for the significant sensitivity to the solvent polarity. Furthermore, as expected for this type of cationic bisamidines, 15 , 31 compound 1 behaved in vitro as a DNA minor groove binder, exhibiting good affinity for extended A/T-rich sites ( Supporting Information ).…”

Evaluation of Ground and Excited State Dipole Moments of 2(3)-tetra(tert-butylphenoxy)phthalocyaninato Zinc(II) from Solvatochromic Data

“…Knowledge of the dipole moments is valuable for the appreciation of the nature of the absorbing states and also in the estimatio n of the dielectric friction contribution to the rotational reorientation of the polar solutes in solvents [7]. In addition, dipole moment is a direct measure of electron distribution in a molecule of the known geometry [8]. A prior knowledge of the dipole moments of the electronically excited species is often useful in the design of non-linear optical materials [9] and in the elucidation of the nature of the excited states.…”

A semi-empirical estimation of ground and excited state dipole moments of zinc phthalocyanine from solvatochromic shift data

“…A convenient method for the estimation of ground and excited state dipole moments is based on the analysis of the solvatochromism of absorption and fluorescence data. This method is easily accessible as it involves only the measurement of absorption and fluorescence maxima, and has been used extensively (Nadaf et al 2004, Husain et al 2012). The solvatochromic method is based on a linear correlation between the wave numbers of the absorption and fluorescence maxima and a solvent polarity function which involves both dielectric constant (e) and refractive index (n) of the medium.…”

“…The solvatochromic method is based on a linear correlation between the wave numbers of the absorption and fluorescence maxima and a solvent polarity function which involves both dielectric constant (e) and refractive index (n) of the medium. The determination of ground and excited state dipole moments of fluorescent organic compounds is well documented (Nadaf et al 2004, Kabatc et al 2006, Husain et al 2012), but there are no reports available in literature on the ground and excited state dipole moments of metallophthalocyanines. This work presents an estimation of the ground and excited state dipole moments of zinc phthalocyanine (ZnPc, Fig.…”