Anisotropic and isotropic solvent effects on the dipole moment and photophysical properties of rhodamine dyes

A combined spectroscopic and TDDFT investigation of the solute‐solvent interactions of two coumarin derivatives

“…The Stokes' shift data also explain the stabilization of the solute molecules in the excited state. Because of this, there is a change in the dipole moment of the dyes upon excitation …”

A highly selective ratiometric fluorescent pH probe based on a PAMAM wavelength-shifting bichromophoric system

“…pH 2 are typical for Rhodamine 6G [56] and do not indicate remarkable changes in the core fluorophore excited state due to the incorporation in the dendritic light-harvesting system. Also, after excitation at 420 nm (1,8-naphthalimide absorption region) and pH 6.5 (spirolactam closed form) the light-harvesting system 7 shows Stoke's shift value 3860 cm À1 that is usual for 1,8-naphthalimide fluorophores [54].…”

“…pH 2 the spirolactam ring of rhodamine is opened, which results in new absorption and emission (rhodamine) bands with well pronounced maxima at 532-534 nm and 560 nm, respectively. The recorded photophysical characteristics for the rhodamine core in intermediate 4 and antenna 7 were common for the Rhodamine 6G derivates [56] ( Table 2). The presented data show that the incorporation of Rhodamine 6G in the light-harvesting antenna does not affect the energy and the shape of the dye absorption and emission bands.…”

Estimation of ground and excited-state dipole moments of synthesized coumarin derivative, (S)-(1-((7-hydroxy-2-oxo-2H-chromen-4-yl)methyl)-1H-1,2,3-triazol-4-yl)methyl 2-(((9H-fluoren-9-yl)methoxy)cabonylamino)-3-phenylpropanoate from a solvatochromic shift and theoretical methods

“…An interesting paper on thermochromism describing the dipole moments and specific interactions in Coumarin 153 has been also published recently [36]. Experimental and theoretical studies on ground and excited state dipole moments of variety of fluorescent molecules using the solvatochromic method have been reported in the recent past [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45]. The ground and excited state dipole moments of some coumarin derivatives were previously determined experimentally by using different methods [46][47][48][49][50].…”