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Temperature Dependence of Charge and Spin Transfer in Azurin

Sang, Yutao and Mishra, Suryakant and Tassinari, Francesco and Kumar, Karuppannan S. and Carmieli, Raanan and Teo, Ruijie D. and Migliore, Agostino and Beratan, David N. and Gray, Harry B. and Pecht, Israel and Fransson, Jonas and Waldeck, David H. and Naaman, Ron (2021) Temperature Dependence of Charge and Spin Transfer in Azurin. Journal of Physical Chemistry C, 125 (18). pp. 9875-9883. ISSN 1932-7447. PMCID PMC8154855. doi:10.1021/acs.jpcc.1c01218.

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The steady-state charge and spin transfer yields were measured for three different Ru-modified azurin derivatives in protein films on silver electrodes. While the charge-transfer yields exhibit weak temperature dependences, consistent with operation of a near activation-less mechanism, the spin selectivity of the electron transfer improves as temperature increases. This enhancement of spin selectivity with temperature is explained by a vibrationally induced spin exchange interaction between the Cu(II) and its chiral ligands. These results indicate that distinct mechanisms control charge and spin transfer within proteins. As with electron charge transfer, proteins deliver polarized electron spins with a yield that depends on the protein’s structure. This finding suggests a new role for protein structure in biochemical redox processes.

Item Type:Article
Related URLs:
URLURL TypeDescription CentralArticle
Sang, Yutao0000-0003-1170-7362
Mishra, Suryakant0000-0002-9331-760X
Carmieli, Raanan0000-0003-4418-916X
Teo, Ruijie D.0000-0003-2203-9662
Migliore, Agostino0000-0001-7780-2296
Beratan, David N.0000-0003-4758-8676
Gray, Harry B.0000-0002-7937-7876
Fransson, Jonas0000-0002-9217-2218
Waldeck, David H.0000-0003-2982-0929
Naaman, Ron0000-0003-1910-366X
Additional Information:© 2021 The Authors. Published by American Chemical Society. Received: February 9, 2021; Revised: April 23, 2021; Published: April 29, 2021. R.D.T., A.M., and D.N.B. acknowledge the support from the National Institutes of Health Grant GM-48043. R.N. acknowledges the partial support from the Minerva Foundation and the Israel Science Foundation. D.H.W. acknowledges support from the NSF (CHE-1900078). Research at Caltech was supported by the National Institute of Diabetes and Digestive and Kidney Diseases of the National Institutes of Health under award number R01DK019038. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health. We thank Dr. Jeffrey J. Warren for providing Ru-modified azurins. The authors declare no competing financial interest.
Funding AgencyGrant Number
Israel Science FoundationUNSPECIFIED
Subject Keywords:Charge transfer, Electrodes, Magnetic properties, Quantum mechanics, Polarization
Issue or Number:18
PubMed Central ID:PMC8154855
Record Number:CaltechAUTHORS:20210503-115703615
Persistent URL:
Official Citation:Temperature Dependence of Charge and Spin Transfer in Azurin. Yutao Sang, Suryakant Mishra, Francesco Tassinari, Senthil Kumar Karuppannan, Raanan Carmieli, Ruijie D. Teo, Agostino Migliore, David N. Beratan, Harry B. Gray, Israel Pecht, Jonas Fransson, David H. Waldeck, and Ron Naaman. The Journal of Physical Chemistry C 2021 125 (18), 9875-9883; DOI: 10.1021/acs.jpcc.1c01218
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108928
Deposited By: George Porter
Deposited On:07 May 2021 19:59
Last Modified:01 Jun 2021 18:30

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