Spectral Properties of Dyes with Interfragmental Charge Transfer: Solvatochromism and Solvatofluorochromism of 2-(3-Coumaroyl)-benzopyrylium Perchlorates

Table 4

Results of regression analysis of the dependence between the positions of the long-wavelength absorption band maxima and the Koppel-Palm and Kamlet-Taft solvent parameters^a.

	Regression equations
I		6	0.897
		6	0.910
II		11	0.718
III		9	0.831
		9	0.937
IV		8	0.811
V		9	0.929
		9	0.799
VI		8	0.847
VII		7	0.990

: quantity of solvents used (this depends on the solubility of CBP perchlorates in the given solvents), : correlation coefficients. Regression coefficients were checked using the -test.