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Citation: ZHENG Shao-Jun, YUAN Zhao, ZENG Yi, LI Ying-Ying, LI Yi. Microenvironment of Dendrimers Probing by Pyrene and Anthracene as Fluorescence Probes[J]. Acta Physico-Chimica Sinica, ;2008, 24(10): 1785-1789. doi: 10.3866/PKU.WHXB20081009 shu

Microenvironment of Dendrimers Probing by Pyrene and Anthracene as Fluorescence Probes

1.
Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China; Graduate School of the Chinese Academy of Sciences, Beijing 100049, P. R. China

Received Date: 28 April 2008
Available Online: 1 September 2008

The microenvironment of carboxylic acid terminated dendrimers (Gn, n=1-4) was studied by using pyrene and anthracene as probes. The results of fluorescence spectra of pyrene indicated that dendrimers G1-G3 adopted an open structure, and G4 took a more close spherical shape which showed better encapsulation capability. The results of fluorescence spectra of (9-anthrymethyl) trimethylammonium(An) in G2 potassiumaqueous solution indicated that G2 could encapsulate more than two An molecules, and the hydrophobic anthracene moiety and the hydrophilic cation portion of An encapsulated within G2 were located in the interior and the periphery of the dendrimer, respectively.
- Dendrimer; Microenvironment polarity; Fluorescence; Pyrene; Anthracene
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