PDI moieties, affords the charge-separated (CS) state, which was clearly detected by its transient absorption spectrum in femtosecond laser flash photolysis measurements. The CS lifetime was determined to be 26 ps. The addition of Mg(ClO4)2 to a benzonitrile solution of 2 and the photoexcitation affords the long-lived CS state with the lifetime of 480 μs, whereas no such long-lived CS state was formed
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酞菁锌-per双
酰亚胺锌五聚体阵列ZnPc(PDI)4 1和2。ZnPc(PDI)4 1在PDI的间隔位置上没有取代基,而ZnPc(PDI)4 2在每个per的间隔位置上具有四个苯氧基。在这两种情况下,PDI部分都直接连接到ZnPc。由于聚集的结果,光激发1会提供分子间的激基复合物,而不是电荷分离的状态。与1相反,对2进行光激发,其在PDI部分中包含空间要求的取代基,可提供电荷分离(CS)状态,这在飞秒激光闪光光解测量中可通过其瞬态吸收光谱清楚地检测到。CS寿命确定为26 ps。添加Mg(CLO的4)2到的
苄腈溶液2和光激发得到具有480微秒的寿命的长寿命的CS的状态,而在的情况下,不形成这样的长寿命的CS状态1在这种条件下。CS寿命的显着延长是由于Mg 2+在CS态下与PDI •-部分的强结合所致。