Conformational Tuning of Magnetic Interactions in Metal–DNA Complexes


  • S.S.M. thanks CSIR for the SR fellowship. S.K.P. acknowledges CSIR and DST, Government of India, and AOARD, US Air Force, for research grants.


The alignment of Cu2+ions along a modified DNA helix is studied with either hydroxypyridone (H) or bis(salicylaldehyde)ethylenediamine (S-en) metalated base pairs (MBPs). The conformational motion of H-MBP leads to the interlinking of the H-MBPs by an extended Cu-O network that is ferromagnetic, whereas the conformational freezing of the S-en-MBP leads to an ordered pairwise-stacked arrangement that is weakly antoferrimagnetic.

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