Fluorescence Study of Energy Transfer in PMMA Polymers with Pendant Oligo-Phenylene-Ethynylenes

被引：9
|
作者：
Schaefer, Johann [1 ,5 ]
Breul, Alexander [2 ,5 ]
Birckner, Eckard [3 ,4 ]
Hager, Martin D. [2 ,5 ,6 ]
Schubert, Ulrich S. [2 ,5 ,6 ]
Popp, Juergen [1 ,3 ,4 ,5 ]
Dietzek, Benjamin [1 ,3 ,4 ,5 ]
机构：
[1] Inst Photon Technol Jena eV, D-07745 Jena, Germany
[2] Univ Jena, Lab Organ & Macromol Chem, D-07743 Jena, Germany
[3] Univ Jena, IPC, D-07743 Jena, Germany
[4] Univ Jena, ACP, D-07743 Jena, Germany
[5] Univ Jena, JCSM, D-07743 Jena, Germany
[6] DPI, NL-5600 AX Eindhoven, Netherlands
来源：
CHEMPHYSCHEM | 2013年 / 14卷 / 01期
关键词：
energy transfer; fluorescence spectroscopy; FRET; light harvesting; polymers; LIGHT-HARVESTING COMPLEX; EXCIMER FORMATION; LUMINESCENCE PROPERTIES; MIGRATION; HYDROGEN; CHROMOPHORES; ABSORPTION; PHOTOCATALYST; PHOTOPHYSICS; TEMPERATURE;
D O I：
10.1002/cphc.201200545
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A spectroscopic characterization of polymers containing rigid p-conjugated oligo(phenyleneethynylene) chromophores as well as oligo(phenyleneethynylene) and methyl methacrylate is presented. The polymers exhibit molar masses of up to 15?000 g?mol-1 and a degree of polymerization between 22 and 80. Emission measurements of the monomeric and polymeric species show that radiative as well as nonradiative rates are influenced by the degree of polymerization due to intramolecular interactions of chromophores pendant to the polymer backbone. Time-resolved emission anisotropy measurements suggest that energy migrates within the polymers. Steady-state emission anisotropy measurements also point to energy migration. Additionally, two oligo(phenyleneethynylene)s with different sizes of the conjugated system are copolymerized in order to enable energy trapping due to energy transfer. The shortened energy-donor fluorescence lifetime within the donoracceptor copolymers suggest energy transfer. Depending on the degree of polymerization, dispersion of the donor fluorescence lifetime is observed.
引用
收藏
页码：170 / 178
页数：9
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