Fluorophore(s) appended fullerene dyads and triads for probing photoinduced energy transfer: syntheses, electronic structure, and fluorescence studies.
Fluorophore(s) appended fullerene dyads and triads for probing photoinduced energy transfer: syntheses, electronic structure, and fluorescence studies.
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荧光团附加富勒烯二元组和三元组，用于探测光诱导能量转移：合成、电子结构和荧光研究。
DOI：
10.1007/s11120-005-5450-z
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发表时间：
2006
影响因子：
3.7
通讯作者：
D'Souza,Francis
中科院分区：
文献类型：
--
作者：
Deviprasad,GollapalliR;Smith,PhillipM;Zandler,MelvinE;Rogers,LisaM;D'Souza,Francis
富勒烯，C60被官能化以具有一个或两个荧光团实体。这样合成的荧光团-富勒烯二元组分含有一种萘、芘或荧烯实体，而三元化合物除了含有一种萘实体外，还含有一种芘或荧烯实体。用循环伏安法研究了它们的氧化还原行为，用从头算B3LYP/3-21G(*)方法推导了它们的几何结构和电子结构。稳态发射研究表明，在二联体的情况下，能量从单重态激发的荧光团向富勒烯实体转移，而在三联体的情况下，能量转移是循序渐进的。在三元化合物的情况下，由于激发波长的扩展范围以诱导能量转移到附加的富勒烯，获得了更好的‘天线效应’。
Fullerene, C60was functionalized to possess one or two fluorophore entities. The fluorophore–fullerene dyads thus synthesized contain either a naphthalene, pyrene, or fluorene entity while the triads contain either a pyrene or fluorene entity in addition to a naphthalene entity. The redox behavior of these dyads and triads were probed by cyclic voltammetric technique, while the geometry and electronic structures were deduced fromab initioB3LYP/3-21G(*) method. Steady-state emission studies revealed the occurrence of energy transfer from the singlet excited fluorophore to the fullerene entity in the case of the dyads while the occurrence of step-by-step sequential energy transfer is envisioned in the case of the triads. A better ‘antenna-effect’ owing to the extended range of excitation wavelength to induce energy transfer to the appended fullerene has been achieved in the case of the triads.