A Study of the Electronic Absorption and Emission Spectra of DBDMA Dye: Solvent Effect, Energy Transfer, and Fluorescence Quenching

Table 1

Measured maximum absorption (λ_abs) and emission wavelengths (λ_ems) for the DBDMA molecule in different solvents.

Solvent	ETOH	Acetone	DMSO	ButOH	CHCl3	CCl4	CH2Cl2	DMF	CH3CN	CHBr3	THF
λabs max (nm)	521	510	511	511	512	517	513	512	508	519	513
λem max (nm)	540	527	533	535	532	525	523	530	523	532	612
Ε M^−1 cm^−1	231034	3514	158620	120689	49655	22222	19493	200000	203448	8181	—
Relative polarity (Δf)	0.654	0.355	0.444	0.586	0.259	0.052	0.309	0.386	0.460	—	0.21
Stokes shift (cm^−1)	19	17	22	24	20	8	10	18	15	—	—