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

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)165-174
Number of pages10
JournalNonlinear Optics Quantum Optics
Issue number1-3
Publication statusPublished - 2006


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

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Electronic, Optical and Magnetic Materials
  • General Computer Science
  • Atomic and Molecular Physics, and Optics
  • Instrumentation


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