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Fluorescence Resonance Energy Transfer of Fluorescent Molecules in Joint‐Linker Type Organic‐Inorganic Hybrid Gels
Author(s) -
Naga Naofumi,
Hashimoto Saki,
Miyanaga Tomoharu,
Furukawa Hidemitsu
Publication year - 2016
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201600272
Subject(s) - perylene , pyrene , förster resonance energy transfer , chemistry , acceptor , photochemistry , fluorescence , linker , molecule , polymer chemistry , organic chemistry , physics , quantum mechanics , computer science , condensed matter physics , operating system
Fluorescence resonance energy transfer (FRET) sensitized emission of perylene by pyrene in a joint‐linker type gel is observed for the first time. The joint‐linker type organic‐inorganic hybrid gels containing pyrene and perylene synthesized from multi‐functional cyclic siloxane, 1,3,5,7‐tetramethylcyclotetrasiloxane (TMCTS), or cubic silsesquioxane, 1,3,5,7,9,11,13,15‐octakis(dimethylsilyloxy)pentacyclo‐[9,5,1,1,1,1]octasilsesquioxane (POSS), as joint molecules, and α,ω‐nonconjugated dienes, 1,5‐hexadiene (HD), or 1,9‐decadiene (DD), as linker molecules, are involved in a photo hydrosilylation reaction with a bis(acetylacetonato)platinum catalyst in a toluene solution of pyrene and perylene. FRET from pyrene (donor) to perylene (acceptor) in the gels is studied quantitatively. The FRET efficiencies ( E ) of gels containing 300 or 30 x 10 –6 m of pyrene and perylene are about 0.6–0.8 or 0.5, respectively, independent of the monomer concentration. Sensitized acceptor emission is observed in the gels, especially in the gels containing 300 x 10 –6 m of pyrene and perylene molecules. The ratio of the increase of the sensitized acceptor emission to the loss of donor fluorescence, the G factor, is determined to evaluate the efficiency of the sensitized emission of the acceptor in the gels. The G factors of the gels containing 300 or 30 x 10 –6 m of pyrene and perylene molecules are 0.4–0.75 or 0.07‐0.1, repectively, and the gels with TMCTS or DD have a slightly higher G factor than gels with POSS or HD.