Spectroscopic and redox properties of amine-functionalized K2[OsII(bpy)(CN)4] complexes

Michael J. Ahrens; Paul A. Bertin; Adam G. Gaustad; Dimitra Georganopoulou; Markus Wunder; Gary F. Blackburn; Harry B. Gray; Thomas J. Meade

doi:10.1039/C0DT01478H

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Spectroscopic and redox properties of amine-functionalized K₂[Os^II(bpy)(CN)₄] complexes†

Michael J. Ahrens,*^a Paul A. Bertin,^a Adam G. Gaustad,^a Dimitra Georganopoulou,^a Markus Wunder,^a Gary F. Blackburn,^a Harry B. Gray^b and Thomas J. Meade*^c

Author affiliations

* Corresponding authors

^a Ohmx Corporation, 1801 Maple Avenue, Suite 6143, Evanston, Illinois, USA
E-mail: michael@ohmx.com
Fax: 1-847-491-8510

^b Beckman Institute, California Institute of Technology, 1200 East California Blvd, MC 139-74, Pasadena, California, USA

^c Departments of Chemistry, Biochemistry and Molecular and Cell Biology, Neurobiology and Physiology, and Radiology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois, USA
E-mail: tmeade@northwestern.edu

Abstract

We report the first examples of amine-functionalized K₂[Os^II(bpy)(CN)₄] (bpy = 2,2′-bipyridine) complexes. The tetracyanoosmate complexes were prepared by UV irradiation (λ = 254 nm) of K₄[Os^II(CN)₆] and primary amine-functionalized bpy ligands in acidic aqueous media. The aqueous solution pH dependences of the spectroscopic and redox properties of 4,4′- and 5,5′-substituted complexes have been investigated. The pendant amine functional groups and coordinated cyanide ligands are basic sites that can be sequentially protonated, thereby allowing systematic tuning of electrochemical and optical spectroscopic properties.

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Article information

DOI: https://doi.org/10.1039/C0DT01478H
Article type: Paper
Submitted: 26 Oct 2010
Accepted: 13 Dec 2010
First published: 18 Jan 2011

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Dalton Trans., 2011,40, 1732-1736

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Spectroscopic and redox properties of amine-functionalized K₂[Os^II(bpy)(CN)₄] complexes

M. J. Ahrens, P. A. Bertin, A. G. Gaustad, D. Georganopoulou, M. Wunder, G. F. Blackburn, H. B. Gray and T. J. Meade, Dalton Trans., 2011, 40, 1732 DOI: 10.1039/C0DT01478H

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