Department of Applied Chemistry and Biochemistry, Kumamoto University, 2-39-1 Kurokami, Kumamoto, Japan.
Chemistry. 2011 Oct 4;17(41):11628-36. doi: 10.1002/chem.201101043. Epub 2011 Aug 31.
A new approach for fabricating donor-acceptor assembled systems is demonstrated, based on J-type ordered aggregation of a low-molecular zinc porphyrin derivative and subsequent integration of a pyridylated fullerene derivative with coordination and orientation onto the porphyrin aggregates. This system achieves unusually high efficiencies in fluorescence quenching during one-to-one mixing of the donor and acceptor. Moreover, the Stern-Volmer constant (K(SV)) and association constant (K) of this system are 2520 and 56 times higher, respectively, than those of the corresponding nonassembled system. The quenching efficiency is thermotropically switchable, since ordered-to-disordered transitions are essential characteristics of noncovalent low molecular assemblies.
展示了一种用于制备给体-受体组装体系的新方法，该方法基于低分子锌卟啉衍生物的 J-型有序聚集，以及随后将吡啶基化富勒烯衍生物与配位和取向集成到卟啉聚集体上。在给体和受体的一对一混合过程中，该体系实现了异常高的荧光猝灭效率。此外，该体系的 Stern-Volmer 常数（K(SV)）和结合常数（K）分别比相应的非组装体系高 2520 倍和 56 倍。由于有序到无序的转变是非共价低分子组装的基本特征，因此猝灭效率是热可调的。
