Magnetic properties of natural and modified DNAs

Chang Hoon Lee; Eui Doo Do; Young Wan Kwon; Dong Hoon Choi; Jung Il Jin; Dong Keun Oh; Hiroyuki Nishide; Takashi Kurata

Magnetic properties of natural and modified DNAs

Chang Hoon Lee^*, Eui Doo Do, Young Wan Kwon, Dong Hoon Choi, Jung Il Jin, Dong Keun Oh, Hiroyuki Nishide, Takashi Kurata

^*Corresponding author for this work

Waseda Research Institute for Science and Engineering

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Natural DNAs in dry state, i.e., A-DNAs, when intercalated with low levels of stable organic free radicals or complexed with low levels of Au(III), are attracted at room temperature to commercial magnets, whereas those containing high levels of intercalators or Au(III) are not. This surprising observation is explained by the EPR spectra and SQUID measurement of magnetization of the modified DNAs. It is conjectured that A-DNAs are morphologically heterogeneous containing ordered and disordered regions. The ordered regions appear to strongly mediate magnetic interactions between spins through their π_z-stacked structures. When the modified DNAs are wet or hydrated, they behave diamagnetically.

Original language	English
Pages (from-to)	165-174
Number of pages	10
Journal	Nonlinear Optics Quantum Optics
Volume	35
Issue number	1-3
Publication status	Published - 2006

Keywords

Au(III)
Complexation
EPR
Magnetism
Modified DNA
Natural DNA
SQUID
Stable organic free radical

ASJC Scopus subject areas

Control and Systems Engineering
Condensed Matter Physics

Cite this

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title = "Magnetic properties of natural and modified DNAs",

abstract = "Natural DNAs in dry state, i.e., A-DNAs, when intercalated with low levels of stable organic free radicals or complexed with low levels of Au(III), are attracted at room temperature to commercial magnets, whereas those containing high levels of intercalators or Au(III) are not. This surprising observation is explained by the EPR spectra and SQUID measurement of magnetization of the modified DNAs. It is conjectured that A-DNAs are morphologically heterogeneous containing ordered and disordered regions. The ordered regions appear to strongly mediate magnetic interactions between spins through their πz-stacked structures. When the modified DNAs are wet or hydrated, they behave diamagnetically.",

keywords = "Au(III), Complexation, EPR, Magnetism, Modified DNA, Natural DNA, SQUID, Stable organic free radical",

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T1 - Magnetic properties of natural and modified DNAs

AU - Lee, Chang Hoon

AU - Do, Eui Doo

AU - Kwon, Young Wan

AU - Choi, Dong Hoon

AU - Jin, Jung Il

AU - Oh, Dong Keun

AU - Nishide, Hiroyuki

AU - Kurata, Takashi

PY - 2006

Y1 - 2006

N2 - Natural DNAs in dry state, i.e., A-DNAs, when intercalated with low levels of stable organic free radicals or complexed with low levels of Au(III), are attracted at room temperature to commercial magnets, whereas those containing high levels of intercalators or Au(III) are not. This surprising observation is explained by the EPR spectra and SQUID measurement of magnetization of the modified DNAs. It is conjectured that A-DNAs are morphologically heterogeneous containing ordered and disordered regions. The ordered regions appear to strongly mediate magnetic interactions between spins through their πz-stacked structures. When the modified DNAs are wet or hydrated, they behave diamagnetically.

AB - Natural DNAs in dry state, i.e., A-DNAs, when intercalated with low levels of stable organic free radicals or complexed with low levels of Au(III), are attracted at room temperature to commercial magnets, whereas those containing high levels of intercalators or Au(III) are not. This surprising observation is explained by the EPR spectra and SQUID measurement of magnetization of the modified DNAs. It is conjectured that A-DNAs are morphologically heterogeneous containing ordered and disordered regions. The ordered regions appear to strongly mediate magnetic interactions between spins through their πz-stacked structures. When the modified DNAs are wet or hydrated, they behave diamagnetically.

KW - Au(III)

KW - Complexation

KW - EPR

KW - Magnetism

KW - Modified DNA

KW - Natural DNA

KW - SQUID

KW - Stable organic free radical

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Magnetic properties of natural and modified DNAs

Abstract

Keywords

ASJC Scopus subject areas

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