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Synthesis and DNA photocleavage study of Ru(bpy)(3)(2+)-(CH2)(n)-MV2+ complexes
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2010 (English)In: Dalton Transactions, ISSN 1477-9226, E-ISSN 1477-9234, Vol. 39, no 18, 4411-4416 p.Article in journal (Refereed) Published
Abstract [en]

A series of Ru(bpy)(3)(2+)-(CH2)(n)-MV2+ complexes (1, n = 3, 4, 7) used for DNA photocleavage have been designed and synthesized. Under the irradiation of visible light, complexes 1 can cleave supercoiled plasmid DNA (pBR322) both in air and under Ar atmosphere. Radical species such as O2(-center dot), (OH)-O-center dot and the light-induced charge-separated (CS) oxidation state Ru(bpy)(3)(3+)-(CH2)(n)-MV+center dot are responsible for the cleavage. The longer the carbon chain linkage, the higher the DNA photocleavage efficiency. It is noted that backwards intramolecular electron transfer (ET) that exist in complexes 1 can lead to some decreasing effect on the cleavage result, while inclusion of complexes 1 with cucurbit[8]uril (CB[8]) inhibits the backwards ET to some extent, thereby increasing photocleavage efficiency.

Place, publisher, year, edition, pages
2010. Vol. 39, no 18, 4411-4416 p.
Keyword [en]
FLASH-QUENCH TECHNIQUE, PHOTOINDUCED ELECTRON-TRANSFER, MIXED-LIGAND COMPLEXES, ARTIFICIAL PHOTOSYNTHESIS, MOLECULAR TRIAD, DONOR-ACCEPTOR, OXIDATION, GUANINE, BINDING, CHEMISTRY
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Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-28257DOI: 10.1039/b927568aISI: 000277031800020Scopus ID: 2-s2.0-77951600785OAI: oai:DiVA.org:kth-28257DiVA: diva2:387629
Note
QC 20110114Available from: 2011-01-14 Created: 2011-01-12 Last updated: 2017-12-11Bibliographically approved

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Sun, Licheng

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