Catalysis of Proton Reduction by a [BO_4]-Bridged Dicobalt Glyoxime

Laga, Stephanie M. and Blakemore, James D. and Henling, Lawrence M. and Brunschwig, Bruce S. and Gray, Harry B. (2014) Catalysis of Proton Reduction by a [BO_4]-Bridged Dicobalt Glyoxime. Inorganic Chemistry, 53 (24). pp. 12668-12670. ISSN 0020-1669. doi:10.1021/ic501804h. https://resolver.caltech.edu/CaltechAUTHORS:20141201-105741726

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Abstract

We report the preparation of a dicobalt compound with two singly proton-bridged cobaloxime units linked by a central [BO_4] bridge. Reaction of a doubly proton-bridged cobaloxime complex with trimethyl borate afforded the compound in good yield. Single-crystal X-ray diffraction studies confirmed the bridging nature of the [BO_4] moiety. Using electrochemical methods, the dicobalt complex was found to be an electrocatalyst for proton reduction in acetonitrile solution. Notably, the overpotential for proton reduction (954 mV) was found to be higher than in the cases of two analogous single-site cobalt glyoximes under virtually identical conditions.

Item Type:

Article

Related URLs:

URL	URL Type	Description
http://dx.doi.org/10.1021/ic501804h	DOI	Article
http://pubs.acs.org/doi/abs/10.1021/ic501804h	Publisher	Article
http://pubs.acs.org/doi/suppl/10.1021/ic501804h	Publisher	Supporting Information

ORCID:

Author	ORCID
Blakemore, James D.	0000-0003-4172-7460
Brunschwig, Bruce S.	0000-0002-6135-6727
Gray, Harry B.	0000-0002-7937-7876

Alternate Title:

Catalysis of Proton Reduction by a [BO4]-Bridged Dicobalt Glyoxime

Additional Information:

© 2014 American Chemical Society. Received: July 28, 2014; published: November 19, 2014. The authors thank Ivonne Ferrer for helpful discussions and Aaron Sattler for assistance in preparation of Figure 2. This research was carried out in part at the Molecular Materials Research Center of the Beckman Institute at Caltech. The research was supported by the Resnick Sustainability Institute at Caltech (Postdoctoral Fellowship to J.D.B.) and the NSF CCI Solar Fuels Program (CHE-1305124 and a CCI Postdoctoral Fellowship to J.D.B.). The Bruker KAPPA APEXII X-ray diffractometer was purchased via an NSF CRIF:MU award to the California Institute of Technology (CHE-0639094). Gas chromatographs were collected at the Joint Center for Artificial Photosynthesis at Caltech.

Group:

Resnick Sustainability Institute, CCI Solar Fuels, JCAP

Funders:

Funding Agency	Grant Number
Resnick Sustainability Institute	UNSPECIFIED
NSF	CHE-1305124
NSF Postdoctoral Fellowship	UNSPECIFIED
NSF	CHE-0639094

Issue or Number:

DOI:

10.1021/ic501804h

Record Number:

CaltechAUTHORS:20141201-105741726

Persistent URL:

https://resolver.caltech.edu/CaltechAUTHORS:20141201-105741726

Official Citation:

Catalysis of Proton Reduction by a [BO4]-Bridged Dicobalt Glyoxime Stephanie M. Laga, James D. Blakemore, Lawrence M. Henling, Bruce S. Brunschwig, and Harry B. Gray Inorganic Chemistry 2014 53 (24), 12668-12670

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ID Code:

52221

Collection:

CaltechAUTHORS

Deposited By:

Tony Diaz

Deposited On:

01 Dec 2014 19:15

Last Modified:

10 Nov 2021 19:22

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