encapsulation of tetracyanoquinodimethane (TCNQ) and fluorescent probe acridinium ions (AcH+) by diethylpyrrole‐bridged bisporphyrin (H4DEP) was used to investigate the structural and spectroscopic changes within the bisporphyrin cavity upon substrate binding. X‐ray diffraction studies of the bisporphyrin host (H4DEP) and the encapsulated host–guest complexes (H4DEP⋅TCNQ and [H4DEP⋅AcH]ClO4) are reported. Negative
用
二乙基吡咯桥联的双
卟啉(H 4
DEP)封装四
氰基喹二
甲烷(TCNQ)和荧光探针a啶离子(AcH +)来研究底物结合后双
卟啉腔内的结构和光谱变化。透视的bisporphyrin主机(H的衍射研究4
DEP)和封装的主-客体复合物(H 4
DEP ⋅ TCNQ和[H 4
DEP ⋅的AcH] CLO 4)的报告。还原电势和
氧化电势的负向和正向移动分别表明难以还原/
氧化封装的复合物。在560 nm激发时,双
卟啉的发射强度在H 4
DEP · TCNQ和[H 4
DEP · AcH] ClO 4中分别被淬灭了约65%和95%,这是由于从激发态的光诱导电子转移引起的。双
卟啉为TCNQ / AcH + ; DFT计算也支持此结果。此外,包封的AcH +的荧光强度与游离离子相比,(在340 nm处激发)也被显着淬灭,这是由于光诱导的单重态到单重态能量从AcH +转移到双
卟啉。因此,AcH +既充当受