Spectral, luminescent, photochemical, and laser properties of a series of boron fluoride complexes of dipyrrolylmethenes in solutions

Abstract

We have studied the spectroscopic and lasing characteristics of active media based on two synthe sized boron fluoride complexes of alkyl substituted dipyrrolylmethenes and the photostability of the com plexes in comparison with complexes of this kind that were previously studied in the literature under identical excitation conditions. We have determined and analyzed conditions under which new compounds have either merits or drawbacks as compared to the known dye with respect to both lasing efficiency and resource char acteristics.

New luminophors based on the binuclear helicates of d-METALS with BIS(DIPYRRIN)S

“…When increasing excitation density (W pump ) the decrease of generation efficiency for [Zn 2 (14) 2 ] complex (see Fig. 13C) was observed [54].…”

“…Since the results on the lasing characteristics of complexes such as dipyrrinates and bis(dipyrrinate)s were absent in the literature, the possibility of the generation of stimulated emission of the [Zn 2 (11) 2 ] and [Zn 2 (14) 2 ] complexes upon excitation by the second harmonic of Nd:YAG laser (532 nm) has been studied [54]. Lasing, photochemical and resource characteristics of the studied complexes are presented in the Table 5.…”

“…15) was studied for [Zn 2 L 2 ] ethanolic solutions with weak fluorescence [53,54]. Transmission of second harmonic Nd:YAG laser is increased in the 10-50 MW × сm -2 region and decreases at high intensities (Fig.…”

“…The dependence of transmittance of the (A) third harmonic Nd:YAG-laser, λ = 355 nm and (B) the second harmonic of Nd:YAG-laser, λ = 532 nm for [Zn 2 (11) 2 ] ethanolic solution on the radiation density[53,54].…”

“…The dependence of [Zn 2 (11) 2 ] helicate fluorescence quantum yield (Φ f ) in binary solvents based on the of cyclohexane (A) and benzene (B) on the mole fraction (χ) of cosolvent[54].…”