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Electrochemical and...
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Wang, Shijun
(författare)
Electrochemical and Electrogenerated Chemiluminescent Studies of a Trinuclear Complex, [((phen)2Ru(dpp))2RhCl2]5+, and Its Interactions with Calf Thymus DNA
- Artikel/kapitelEngelska2009
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2009-04-09
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American Chemical Society (ACS),2009
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printrdacarrier
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LIBRIS-ID:oai:DiVA.org:umu-129241
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https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-129241URI
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https://doi.org/10.1021/ac900282yDOI
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Språk:engelska
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Sammanfattning på:engelska
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The electrochemical behavior of a trinuclear ruthenium(II)-containing complex, [((phen)2Ru(dpp))2RhCl2]5+ (where phen = 1,10-phenanthroline, dpp = 2,3-bis(2-pyridyl)pyrazine), was studied in acetonitrile (MeCN) and aqueous solutions. In MeCN containing 0.10 M tetra-n-butylammonium perchlorate (TBAP), the complex displayed a reversible, overlapping RuII/III redox process with E1/2 = +1.21 V vs Ag/Ag+ (10 mM), an irreversible reduction of RhIII/I at −0.73 V vs Ag/Ag+, and two quasi-reversible dpp/dpp− couples with E1/2 = −1.11 and −1.36 V vs Ag/Ag+ at a Pt electrode with a scan rate of 50 mV s−1. In 0.20 M Tris buffer solution (pH 7.4), an irreversible, overlapping RuII/III oxidation at +1.48 V vs Ag/AgCl (3 M KCl), and an irreversible reduction of RhIII/II at −0.78 V vs Ag/AgCl were observed at a glassy carbon electrode with a scan rate of 50 mV/s. Investigations on the electrogenerated chemiluminescence (ECL) of the complex revealed that 2-(dibutylamino) ethanol (DBAE) was superior to tri-n-propylamine (TPrA) as an ECL coreactant within their entire concentration range of 10−100 mM in MeCN, and in aqueous media, as low as 1.0 nM of the complex can be detected using TPrA coreactant ECL. A maximum ECL emission of 640 nm, which is about 55 nm blue shift to its fluorescence, was observed in MeCN with DBAE as a coreactant. Interactions of the complex with calf thymus DNA (ctDNA) were conducted with a flow-cell based quartz-crystal microbalance, and a binding constant of 2.5 × 105 M−1 was calculated on the basis of the Langmuir isotherm equation.
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Biuppslag (personer, institutioner, konferenser, titlar ...)
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Milam, Jenifer
(författare)
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Ohlin, C. Andre
(författare)
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Rambaran, Varma H.
(författare)
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Clark, Eva
(författare)
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Ward, Woodrow
(författare)
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Seymour, Luke
(författare)
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Casey, William H.
(författare)
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Holder, Alvin A.
(författare)
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Miao, Wujian
(författare)
Sammanhörande titlar
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Ingår i:Analytical Chemistry: American Chemical Society (ACS)81:10, s. 4068-40750003-27001520-6882
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Wang, Shijun
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Milam, Jenifer
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Ohlin, C. Andre
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Rambaran, Varma ...
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Clark, Eva
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Ward, Woodrow
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Seymour, Luke
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Casey, William H ...
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Holder, Alvin A.
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Miao, Wujian
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