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Redox-state effects on small molecule bin multimetallic iron complexes

De Ruiter, Graham and Thompson, Niklas B. and Agapie, Theodor (2015) Redox-state effects on small molecule bin multimetallic iron complexes. In: 250th American Chemical Society National Meeting & Exposition, August 16-20, 2015, Boston, MA. http://resolver.caltech.edu/CaltechAUTHORS:20150923-082335334

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Abstract

The biochem. processing of a variety of small mols. including H_2, N_2, CO_2, CO and NO_x requires complex machinery. Metalloenzymes are highly specialized in such transformations, and often employ multi-metal cooperativity. Controlling, rationally, the assembly of multiple metals into a single synthetic framework remains a challenge. Furthermore, understanding multi-metal cooperativity and esp. the role that different redox-states play in small mol. activation is of fundamental importance. As such, we have shown previously how redoxinactive metals influence the redn. potential in different hetero-metallic clusters. Here we present a new class of tetra-iron complexes that are site differentiated, with three iron centers that are six-coordinate and one unique four-coordinate iron center. We show that nitric oxide (NO) is able to bind at the unique iron center and, subsequently, the NO binding was investigated as a function of the redox-state of the metal cluster. Structural and spectroscopic characterization indicates that the change in redox-states occurs at a distal site of the metal cluster, and the obsd. distal redox-modulation is responsible for the different degree of NO activation.


Item Type:Conference or Workshop Item (Paper)
Related URLs:
URLURL TypeDescription
http://www.acs.org/content/acs/en/meetings/fall-2015.htmlOrganizationConference Website
ORCID:
AuthorORCID
Thompson, Niklas B.0000-0003-2745-4945
Agapie, Theodor0000-0002-9692-7614
Additional Information:© 2015 American Chemical Society.
Record Number:CaltechAUTHORS:20150923-082335334
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20150923-082335334
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:60434
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:23 Sep 2015 19:49
Last Modified:27 Nov 2017 21:33

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