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Crystals 2015, 5(4), 475-490;

Role of Water Molecules to the Electronic States of M-DNA

Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
Authors to whom correspondence should be addressed.
Academic Editor: Martin T. Lemaire
Received: 20 September 2015 / Revised: 6 October 2015 / Accepted: 10 October 2015 / Published: 20 October 2015
(This article belongs to the Special Issue High Spin Molecules)
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Various kinds of roles of the water molecules in the electronic states of the complexes of metal ions (M) and deoxyribonucleic acid (DNA) are reviewed. Divalent metal ions M like Fe, Mn, Zn and so on, form Metal-DNA complexes (M-DNA) with each metal ion between the bases of a base pair of DNA. The electronic states of the complexes depend on the species of ions in M-DNA. Metal ions in Fe-DNA and Mn-DNA possess 3d magnetic moments, but those in Zn-DNA do not. Interestingly, the magnetic property of the complexes, especially the magnetic interaction between the metal ions, is dominated by water molecules in the complexes. In Fe-DNA, the water molecules play a role of ligands for the iron ions, which controls the spin states of Fe3+, whereas they govern the magnetic interaction between the Mn2+ ions in Mn-DNA. In contrast, Zn-DNA has no 3d magnetic moment, but the water molecules dominate the bonding states of the Zn ions and the magnetic states of the Zn-DNA system. View Full-Text
Keywords: DNA; metal ions; M-DNA; water molecules; magnetic property; ESR; SQUID DNA; metal ions; M-DNA; water molecules; magnetic property; ESR; SQUID

Figure 1

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Mizoguchi, K.; Sakamoto, H. Role of Water Molecules to the Electronic States of M-DNA. Crystals 2015, 5, 475-490.

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