High Stokes shift long-wavelength energy gap regulated fluorescence in the series of nitro/dimethylamino-substituted ortho-analogs of POPOP
Invited PaperAbstract:
Received 24 May 2011; Accepted 18 July 2011
Keywords: Ortho-analogs of POPOP • High Stokes shift fluorescence • Solvatochromism • Energy gap law • ESS-analysis.A series of novel nitro-substituted ortho-analogs of POPOP was synthesized. Like the most of the other known compounds of this class, the synthesized molecules demonstrate high Stokes shift fluorescence emission owing to the planarization of their molecules at electronic excitation. Significant fluorescence quenching in polar solvents was described as the "energy gap law" action rather than the specific effect of the dialkylamino group excited state twisting.
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