Synthesis and systematic investigation of the spectral-luminescent properties of “bis-flavonol” 1,4-bis-(3-hydroxy-4-oxo-4H-chromen-2-yl)-benzene} were performed. Hypothetical possibility for the double excited-state proton transfer reaction in bis-flavonol is discussed based on both quantum-chemical modeling and experimental data. Consecutive S1*-state transfer of the two protons of the title molecule is shown to be energetically unfavorable, however, still preserving a possibility for the concerted double proton transfer in the excited dienol form.
对“双黄酮”1,4-双-(3-羟基-4-氧代-4H-香豆素-2-基)-苯}的光谱-发光性质进行了合成和系统研究。基于量子化学建模和实验数据,讨论了双黄酮中双重激发态质子转移反应的假设可能性。显示了标题分子的两个质子的连续S1 *态转移在能量上是不利的,但仍然保留了在激发的二烯醇形式中协同双质子转移的可能性。