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Role of sugar in controlling reaction pattern: A comparative study with adenine and 2′-deoxyadenosine

Paper ID Volume ID Publish Year Pages File Format Full-Text
28964 44109 2009 6 PDF Available
Title
Role of sugar in controlling reaction pattern: A comparative study with adenine and 2′-deoxyadenosine
Abstract

Interaction between 2-methyl-1,4-naphthoquinone (MQ) and adenine (A) and 2′-deoxyadenosine (dA) reveals interesting differences with respect to electron transfer (ET) and hydrogen abstraction (HA). In our case A and dA exhibited ET from different sites, which has been associated to the presence of a sugar unit in dA. Sugar unit has also reduced the rate of ET from dA. We have utilized an external magnetic field in conjunction with our laser flash photolysis set-up to establish our data. In a polar MeCN/H2O medium A and dA are found to promote ET but HA from dA is seen to be insignificant. However shifting to a heterogeneous micellar medium has been found to have a marked effect in increasing the HA rate for dA only. Separate experiments with 2′-deoxyribose sugar have revealed sugar moiety to be more susceptible to HA in SDS medium.

Keywords
MQ, 2-methyl-1,4-naphthoquinone; A, adenine; dA, 2′-deoxyadenosine; ISC, intersystem crossing; MF, magnetic field; MFE, magnetic field effect; S, singlet; T, triplet; ET, electron transfer; RP, radical pair; RIP, radical ion pair; SDS, sodium dodecyl sulp
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Role of sugar in controlling reaction pattern: A comparative study with adenine and 2′-deoxyadenosine
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 201, Issues 2–3, 25 January 2009, Pages 197–202
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
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Price was $35.95
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Price after discount Only $4.95
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