Surface Enhanced Raman Scattering(SERS) Studies on the Interaction Between Self-assembled DNA and [Co(phen)3]2+/3+

Abstract

Abstract: The electrochemical in situ SERS study of the interaction between [Co(phen)₃] ^2+/3+ and ssDNA as well as dsDNA self-assembled on the gold substrate are conducted here for the first time, and the molecular-level information of interaction is obtained. In situ SERS spectroscopic evidence shows that [Co(phen)₃] ^2+/3+ binds dsDNA via both the intercalative mode into the A-T and G-C-rich regions and the electrostatic mode with [Co(phen)₃] ^2+/3+-PO₂ interaction. A partial reduction of B-DNA structure of dsDNA in favor of A-DNA occurs upon [Co(phen)₃] ^2+/3+-dsDNA interaction. While [Co(phen)₃] ^2+/3+ binds ssDNA probably via electrostatic mode with [Co(phen)₃] ^2+/3+-backbone interaction.

Key words: ssDNA, dsDNA, [Co(phen)₃] ^2+/3+, Surface Enhanced Raman Spectrascopy(SERS), Interaction

CLC Number:

O646

TrendMD:

DONG Li-Qin, ZHOU Jian-Zhang, WU Ling-Ling, DONG Ping, LIN Zhong-Hua . Surface Enhanced Raman Scattering(SERS) Studies on the Interaction Between Self-assembled DNA and [Co(phen)₃]^{^2+/3+}[J]. Chem. J. Chinese Universities, 2003, 24(2): 315.

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Surface Enhanced Raman Scattering(SERS) Studies on the Interaction Between Self-assembled DNA and [Co(phen)₃]^{^2+/3+}

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