The structural effect of Methyl substitution on the binding of Polypyridyl Ru-dppz Complexes to DNA

Hall, J. P. ORCID: https://orcid.org/0000-0003-3716-4378, Beer, H., Buchner, K., Cardin, D. J. and Cardin, C. J. ORCID: https://orcid.org/0000-0002-2556-9995 (2015) The structural effect of Methyl substitution on the binding of Polypyridyl Ru-dppz Complexes to DNA. Organometallics, 34 (11). pp. 2481-2486. ISSN 0276-7333 doi: 10.1021/om501208x

Abstract/Summary

ABSTRACT: Polypyridyl ruthenium complexes have been intensively studied and possess photophysical properties which are both interesting and useful. They can act as probes for DNA, with a substantial enhancement in emission when bound, and can induce DNA damage upon photoirradiation and therefore, the synthesis and characterization of DNA binding of new complexes is an area of intense research activity. Whilst knowledge of how the binding of derivatives compares to the parent compound is highly desirable, this information can be difficult to obtain. Here we report the synthesis of three new methylated complexes, [Ru(TAP)2(dppz-10-Me).2Cl, [Ru(TAP)2(dppz-10,12-Me2)].2Cl and [Ru(TAP)2(dppz-11-Me)].2Cl, and examine the consequences for DNA binding through the use of atomic resolution X-ray crystallography. We find that the methyl groups are located in discrete positions with a complete directional preference. This may help to explain the quenching behavior which is found in solution for analogous [Ru(phen)2(dppz)]2+ derivatives.

Item Type	Article
URI	https://reading-pure-test.eprints-hosting.org/id/eprint/40116
Identification Number/DOI	10.1021/om501208x
Refereed	Yes
Divisions	Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry Life Sciences > School of Chemistry, Food and Pharmacy > School of Pharmacy Central Services
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