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Light-harvesting Three-Chromophore Systems Based on Biphenyl-Bridged Periodic Mesoporous Organosilica

Light-harvesting Three-Chromophore Systems Based on Biphenyl-Bridged Periodic Mesoporous Organosilica

Lyubov Grösch, Young Joo Lee, Frank Hoffmann, Michael Fröba

Chemistry. 2015 Jan 2;21(1):331-46.

PMID: 25352478

Abstract:

Three-chromophore systems with light-harvesting behavior were prepared, which are based on periodic mesoporous organosilica (PMO) with crystal-like ordered structure. The organic bridges of biphenyl-PMO in the pore walls act as donors and two types of dye are incorporated in the one-dimensional channels. Consecutive two-step-Förster resonance energy transfer is observed from the biphenyl moieties to mediators (diethyl-aminocoumarin or aminoacridone), followed by energy transfer from mediators to acceptors (dibenzothiacarbocyanine, indodicarbocyanine, sulforhodamine G). High energy-transfer efficiencies ranging from 70 to 80 % are obtained for two-step-FRET, indicating that the mesochannel structure with one-dimensional ordering provides spatial arrangement of chromophore pairs for an efficient direct energy transfer. The emission wavelength can be tuned by a choice of acceptor dye: 477 nm (diethylaminocoumarin), 519 nm (aminoacridone), 567 nm (sulforhodamine G), 630 nm (dibenzothiacarbocyanine), and 692 nm (indodicarbocyanine).

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP5873165	Sulforhodamine G		5873-16-5	Price

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