紧身衣
联苯
吸收(声学)
光化学
分子内力
接受者
超快激光光谱学
混合的
化学
辐照
亚苯基
材料科学
荧光
立体化学
物理
光学
激光器
有机化学
生物
凝聚态物理
复合材料
核物理学
聚合物
植物
作者
Ji Young Shin,Kilsuk Kim,Jong Min Lim,Takayuki Tanaka,Dongho Kim,Kimoon Kim,Hiroshi Shinokubo,Atsuhiro Osuka
标识
DOI:10.1002/chem.201400315
摘要
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.
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