Antiferromagnetic Coupling of Stacked CuII-Salen Complexes in DNA

Antiferromagnetic Coupling of Stacked CuII-Salen Complexes in DNA

A pretty couple: Two copper–salen metal–base pairs were incorporated into a DNA double helix in neighboring positions (see picture). The two paramagnetic CuII ions are antiferromagnetically coupled, and the exchange coupling constant is −2J=22.4 cm−1. The dipolar coupling constant yielded a Cu⋅⋅⋅Cu...

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Veröffentlicht in:Angewandte Chemie (International ed.) 2010-07, Vol.49 (29), p.4927-4929
Hauptverfasser: Clever, Guido H, Reitmeier, Stephan J, Carell, Thomas, Schiemann, Olav
Format: Artikel
Sprache:eng
Schlagworte:
copper
DNA
EPR spectroscopy
N,O ligands
nanomaterials
O ligands
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Zusammenfassung:A pretty couple: Two copper–salen metal–base pairs were incorporated into a DNA double helix in neighboring positions (see picture). The two paramagnetic CuII ions are antiferromagnetically coupled, and the exchange coupling constant is −2J=22.4 cm−1. The dipolar coupling constant yielded a Cu⋅⋅⋅Cu distance of 3.7 Å, which is comparable to the base‐pair distance in natural B‐type DNA.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.200906359