open access

https://hdl.handle.net/2115/48141

Synthesis, structure and photophysical properties of a flavin-based platinum(II) complex

英語

2011-04-14

Royal Society of Chemistry

Dalton Transactions

40(14)

3484-3489

We synthesized a thiosemicarbazone-functionalized flavin (Fl-(H)TSC: 2-[2-(3,4-dihydro-7,8-dimethyl-2,4-dioxobenzo[g]pteridin-10(2H)-yl)ethylidene]-hydrazinecarbothioamide) and its Pt(II) complex [Pt(Fl-TSC)2], and characterized it using X-ray diffraction, UV-visible absorption and luminescence spectroscopy. X-ray structural analysis for [Pt(Fl-TSC)2] revealed that the structure of the isoalloxazine part was almost the same as that in lumiflavin (7,8,10-trimethylisoalloxazine), and the thiosemicarbazone moiety acted as a bidentate ligand to form a PtS2N2 planar conformation. UV-visible absorption and luminescence spectra of these compounds were very similar to those of riboflavin, but the emission intensity and the lifetime decreased considerably. Theoretical calculations suggested that the charge-separated state (Fl^[・-]-TSC^[・+]) contributed to the faster quenching from the 1π-π* emission state.

学術雑誌論文

Accepted Manuscript

Dalton Trans., 2011, 40, 3484-3489 - Reproduced by permission of The Royal Society of Chemistry (RSC)

1477-9226