Moreover, the Z-isomer of EAMP2 is unusual stable up to 600 min at room temperature in dark compared to the EAMP1, which undergoes full Z→E relaxation for less than 60 min at the same conditions. The Z→E relaxation of EAMP2 is achieved for 90 min at 60 °C. The fluorescence E→Z switching behavior was studied by emission measurements in AcCN and 1,4-DOX as E-isomers and at PSS in room and liquid nitrogen (77
在这里,我们报告了两个含有
蒽基和4-(二甲基
氨基)苯基部分(E
AMP1和E
AMP2)的4-取代的偶氮甲碱邻苯二甲
酰亚胺的合成和E→Z光转换行为。这些化合物代表了新合成且尚未研究的光开关,具有双重荧光性质,如E-异构体,并且根据溶剂的极性处于光固定状态(PSS)。在各种溶剂中进行了稳态荧光测量,结果表明对环境极性具有很强的敏感性。E→Z的动力学在AcCN中,通过在410 nm处的可见光激活(E
AMP1)和在350 nm处的长波长UV光激活(E
AMP2)研究了光转换为PSS。开关行为的定量和定性性能通过光异构化程度(R)和速率常数(k)进行评估。发现分别为E
AMP1 R= 6.95%,k= 8.87×10 -4 s -1和E
AMP2 R= 88.72%,k= 4.00×10 -4 s -1。通过优化E-和E-的分子几何结构分析了E
AMP1的光转化率低于E
AMP2的原因。通过DFT / TD-DFT计算得到的Z-异构体处于基态(S