Add time:07/17/2019         Source:sciencedirect.com

A series of novel multipolar symmetric and asymmetric N–heterocyclic compounds with different configurations were designed and synthesized. Their structures were characterized by Fourier transform infrared spectroscopy, hydrogen−1 nuclear magnetic resonance, and mass spectrometry. Their photophysical properties including linear absorption, single–photon excited fluorescence, two–photon absorption, and two–photon excited fluorescence, were systematically investigated in various solvents. The relationships between the structures and the photophysical properties were studied aided with the density functional theory calculations.

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