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- W2033504051 abstract "Molten salts of Ni(bpy350)32+ and single stranded oligonucleotides were prepared (bpy350 = 4,4‘-(CH3(OCH2CH2)7.24OCO)2-2,2‘-bipyridine). Photoinduced electron transfer was observed between small amounts of Ru(bpz)32+* (E2+*/1+ = 1.35 V vs SCE, bpz = 2,2‘-bipyrazine) added to the melt and guanine in the nucleic acid, by measuring the emission lifetime of the ruthenium complex in melts containing varying amounts of guanine-containing nucleic acid. Electrochemically determined diffusion coefficients in these media were <1 × 10-11 cm2/s, showing that the Ru(bpz)32+* diffuses less than 0.4 Å during the measured excited-state lifetime. A linear relationship was observed between the fraction of Ru(bpz)32+* that was quenched (calculated as (τ° − τ)/τ) and the mole fraction of guanine-containing oligonucleotides. This relationship supports a quenching mechanism that does not involve diffusion of the ruthenium complex. The average electron-transfer rate constant at full guanine loading was 7 × 106 s-1, which implies an average electron-transfer distance of 12.5 Å (center-to-center)." @default.
- W2033504051 created "2016-06-24" @default.
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- W2033504051 date "2003-06-11" @default.
- W2033504051 modified "2023-09-26" @default.
- W2033504051 title "Photoinduced Electron Transfer in Nucleic Acid Molten Salts" @default.
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- W2033504051 doi "https://doi.org/10.1021/jp022586c" @default.
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