Photodynamics of [26]- and [28]Hexaphyrin-Bodipy Hybrids
Photodynamics of [26]- and [28]Hexaphyrin-Bodipy Hybrids
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[26]-和[28]Hexaphyrin-Bodipy杂化物的光动力学
DOI：
10.1002/chem.201400315
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
and A. Osuka
中科院分区：
文献类型：
--
作者：
J.-Y. Shin;K. Kim;J. M. Lim;T. Tanaka;D. Kim;K. Kim;H. Shinokubo;and A. Osuka
制备了一组杂化物，其通过使用亚苯基、亚联苯基和三亚苯基桥而具有六菲瑞和二苯二吡基部分之间的距离逐渐变化。成功观察到从 bodipy（供体）到 [26]- 或 [28]hexaphyrin（受体）的高效 PET 过程，其中 PET 速度由供体和受体之间的分子内距离控制。 515nm 的紫外线照射产生了与体吸收相对应的谱带。随着时间的延迟，体吸收带减少，并且逐渐出现与[28]-和[26]-杂化物各自的吸收带相对应的615和580 nm处的新吸收带。尽管具有三联苯桥的[28]/[26]杂化物的飞秒瞬态吸收光谱完全显示了从bodipy到六氢菲林的能量转移，但使用615和580nm脉冲照射杂化物并没有诱导PET过程的相反方式。基于[26]-杂化物的中心到中心距离比[28]-杂化物更大，[26]-杂化物组导致缓慢的衰减/上升过程。实验获得的PET参数与计算的PET参数相当一致。
A set of hybrids having gradual variation in distances between hexaphyrin and bodipy moieties, given by uses of phenylene, biphenylene, and triphenyelene bridges was prepared. Efficient PET processes from bodipy (donor) to [26]‐ or [28]hexaphyrin (acceptor) were successfully observed, where the PET speed was controlled by intramolecular distances between the donor and the acceptor. UV irradiation at 515 nm raised a band corresponding to the bodipy absorption. As the time delayed, the bodipy bands decreased and new absorption bands at 615 and 580 nm corresponding to respective absorption bands of [28]‐ and [26]‐hybrids gradually appeared. Whereas the femtosecond transient absorption spectra of [28]/[26]‐hybrids having terphenylene bridges completely showed energy transfers from bodipy to hexaphyrin, irradiation of the hybrids using 615 and 580 nm pulses did not induce opposite ways of the PET process. On the basis of enlarged center‐to‐center‐distances of [26]‐hybrids than those of [28]‐hybrids, the set of [26]‐hybrids resulted in slow decay/rise processes. PET parameters obtained with the experiments were fairly consistent with the PET parameters calculated.