Fluorescence Resonance Energy Transfer of Fluorescent Molecules in Joint‐Linker Type Organic‐Inorganic Hybrid Gels. Issue 24 (6th October 2016)

• Record Type: Journal Article
• Authors: Naga, Naofumi; Hashimoto, Saki; Miyanaga, Tomoharu; Furukawa, Hidemitsu
• Is Part Of: Macromolecular chemistry and physics. Volume 217:Issue 24(2016:Dec.)
• Page Start: 2671
• Page End: 2678
• Publication Date: 2016-10-06
• Subjects: fluorescence resonance energy transfer (FRET) -- fluorescent molecules -- FRET sensitized emission -- gels; Polymers -- Periodicals; Polymerization -- Periodicals; Synthetic products -- Periodicals; Macromolecules -- Periodicals; 547.7
• DOI: 10.1002/macp.201600272
• Languages: English
• ISSNs: 1022-1352

Abstract

Abstract : 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. Abstract : Joint‐linker type organic‐inorganic hybrid gels containing pyrene and perylene are synthesized from multi‐functional cyclic siloxane cubic silsesquioxane with α, ω‐nonconjugated dienes, using a hydrosilylation reaction with a platinum catalyst in toluene. The resulting gels show fluorescence resonance energy transfer (FRET) sensitized emission of perylene.