Please use this identifier to cite or link to this item: https://ktisis.cut.ac.cy/handle/10488/13677
Title: Reversible temperature-dependent high- to low-spin transition in the heme Fe–Cu binuclear center of cytochrome ba3 oxidase
Authors: Nicolaides, Antonis 
Soulimane, Tewfik 
Varotsis, Constantinos 
Keywords: Barium alloys;Binary alloys;Calcium alloys;Copper alloys
Category: Chemical Sciences
Field: Natural Sciences
Issue Date: 2019
Source: RSC Advances, 2019, Volume 9, Issue 9, Pages 4776-4780
Journal: RSC Advances 
Abstract: A reversible temperature-dependent high-spin to low-spin transition with T 1/2 =-60 °C has been observed in the resonance Raman spectra of the equilibrium reduced and photoreduced heme a 3 of the thermophilic ba 3 heme-copper oxidoreductase. The transition is based on the frequency shifts of the spin-state marker bands ν 2 (C b C b ) and ν 10 (C a C m ) and is attributed to the displacement of the heme iron along the heme normal as a consequence of the Fe-Np repulsion at temperature below-40 °C which will increase the ligand field strength forcing the pairing of d electrons into the lower energy orbitals.
URI: http://ktisis.cut.ac.cy/handle/10488/13677
ISSN: 2046-2069
DOI: 10.1039/c8ra09954e
Rights: © 2019 The Royal Society of Chemistry.
Type: Article
Appears in Collections:Άρθρα/Articles

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