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Soltau SR, Dahlberg PD, Niklas J, Poluektov OG, Mulfort KL, Utschig LM. Ru-protein-Co biohybrids designed for solar hydrogen production: understanding electron transfer pathways related to photocatalytic function. Chem Sci 2016; 7:7068-7078. [PMID: 28451142 PMCID: PMC5355951 DOI: 10.1039/c6sc03121h] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 08/05/2016] [Indexed: 12/12/2022] Open
Abstract
Two ruthenium-protein-cobaloxime biohybrids produce photocatalytic hydrogen through different catalytic pathways characterized by EPR and transient optical spectroscopies.
A series of Ru–protein–Co biohybrids have been prepared using the electron transfer proteins ferredoxin (Fd) and flavodoxin (Fld) as scaffolds for photocatalytic hydrogen production. The light-generated charge separation within these hybrids has been monitored by transient optical and electron paramagnetic resonance spectroscopies. Two distinct electron transfer pathways are observed. The Ru–Fd–Co biohybrid produces up to 650 turnovers of H2 utilizing an oxidative quenching mechanism for Ru(ii)* and a sequential electron transfer pathway via the native [2Fe–2S] cluster to generate a Ru(iii)–Fd–Co(i) charge separated state that lasts for ∼6 ms. In contrast, a direct electron transfer pathway occurs for the Ru–ApoFld–Co biohybrid, which lacks an internal electron relay, generating Ru(i)–ApoFld–Co(i) charge separated state that persists for ∼800 μs and produces 85 turnovers of H2 by a reductive quenching mechanism for Ru(ii)*. This work demonstrates the utility of protein architectures for linking donor and catalytic function via direct or sequential electron transfer pathways to enable stabilized charge separation which facilitates photocatalysis for solar fuel production.
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Affiliation(s)
- Sarah R Soltau
- Chemical Sciences and Engineering Division , Argonne National Laboratory , Argonne , IL 60439 , USA . ; Tel: +1-630-252-3544
| | - Peter D Dahlberg
- Chemical Sciences and Engineering Division , Argonne National Laboratory , Argonne , IL 60439 , USA . ; Tel: +1-630-252-3544.,Graduate Program in Biophysics , The University of Chicago , Chicago , IL 60637 , USA
| | - Jens Niklas
- Chemical Sciences and Engineering Division , Argonne National Laboratory , Argonne , IL 60439 , USA . ; Tel: +1-630-252-3544
| | - Oleg G Poluektov
- Chemical Sciences and Engineering Division , Argonne National Laboratory , Argonne , IL 60439 , USA . ; Tel: +1-630-252-3544
| | - Karen L Mulfort
- Chemical Sciences and Engineering Division , Argonne National Laboratory , Argonne , IL 60439 , USA . ; Tel: +1-630-252-3544
| | - Lisa M Utschig
- Chemical Sciences and Engineering Division , Argonne National Laboratory , Argonne , IL 60439 , USA . ; Tel: +1-630-252-3544
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Priyadarshani N, Dutta A, Ginovska B, Buchko GW, O’Hagan M, Raugei S, Shaw WJ. Achieving Reversible H2/H+ Interconversion at Room Temperature with Enzyme-Inspired Molecular Complexes: A Mechanistic Study. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01433] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Nilusha Priyadarshani
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United States
| | - Arnab Dutta
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United States
| | - Bojana Ginovska
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United States
| | - Garry W. Buchko
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United States
| | - Molly O’Hagan
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United States
| | - Simone Raugei
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United States
| | - Wendy J. Shaw
- Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, United States
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53
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Gee LB, Lin CY, Jenney FE, Adams MW, Yoda Y, Masuda R, Saito M, Kobayashi Y, Tamasaku K, Lerche M, Seto M, Riordan CG, Ploskonka A, Power PP, Cramer SP, Lauterbach L. Synchrotron-based Nickel Mössbauer Spectroscopy. Inorg Chem 2016; 55:6866-72. [PMID: 27387959 PMCID: PMC6813798 DOI: 10.1021/acs.inorgchem.5b03004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We used a novel experimental setup to conduct the first synchrotron-based (61)Ni Mössbauer spectroscopy measurements in the energy domain on Ni coordination complexes and metalloproteins. A representative set of samples was chosen to demonstrate the potential of this approach. (61)NiCr2O4 was examined as a case with strong Zeeman splittings. Simulations of the spectra yielded an internal magnetic field of 44.6 T, consistent with previous work by the traditional (61)Ni Mössbauer approach with a radioactive source. A linear Ni amido complex, (61)Ni{N(SiMe3)Dipp}2, where Dipp = C6H3-2,6-(i)Pr2, was chosen as a sample with an "extreme" geometry and large quadrupole splitting. Finally, to demonstrate the feasibility of metalloprotein studies using synchrotron-based (61)Ni Mössbauer spectroscopy, we examined the spectra of (61)Ni-substituted rubredoxin in reduced and oxidized forms, along with [Et4N]2[(61)Ni(SPh)4] as a model compound. For each of the above samples, a reasonable spectrum could be obtained in ∼1 d. Given that there is still room for considerable improvement in experimental sensitivity, synchrotron-based (61)Ni Mössbauer spectroscopy appears to be a promising alternative to measurements with radioactive sources.
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Affiliation(s)
- Leland B. Gee
- Department of Chemistry, University of California, Davis, CA, 95616, USA
| | - Chun-Yi Lin
- Department of Chemistry, University of California, Davis, CA, 95616, USA
| | - Francis E. Jenney
- Georgia Campus, Philadelphia College of Osteopathic Medicine, Suwanee, GA, 30024, USA
| | - Michael W.W. Adams
- Georgia Campus, Philadelphia College of Osteopathic Medicine, Suwanee, GA, 30024, USA
| | - Yoshitaka Yoda
- Research and Utilization Division JASRI/SPring-8, 1-1-1 Kouto, Sayo-gun, Hyogo 679-5198, Japan
| | - Ryo Masuda
- Research Reactor Institute, Kyoto University, Kumatori-cho, Sennan-gun, Osaka 590-0494, Japan
| | - Makina Saito
- Research Reactor Institute, Kyoto University, Kumatori-cho, Sennan-gun, Osaka 590-0494, Japan
| | - Yasuhiro Kobayashi
- Research Reactor Institute, Kyoto University, Kumatori-cho, Sennan-gun, Osaka 590-0494, Japan
| | - Kenji Tamasaku
- SR Material Science Inst. Unit, RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo, Hyogo, 679-5148, Japan
| | - Michael Lerche
- Department of Chemistry, University of California, Davis, CA, 95616, USA
| | - Makoto Seto
- Research Reactor Institute, Kyoto University, Kumatori-cho, Sennan-gun, Osaka 590-0494, Japan
- Japan Atomic Energy Agency, Mikazuki-cho, Sayo-gun, Hyogo 679-5148, Japan
| | - Charles G. Riordan
- Department of Chemistry & Biochemistry, University of Delaware, Newark, DE 19716 USA
| | - Ann Ploskonka
- Department of Chemistry & Biochemistry, University of Delaware, Newark, DE 19716 USA
| | - Philip P. Power
- Department of Chemistry, University of California, Davis, CA, 95616, USA
| | - Stephen P. Cramer
- Department of Chemistry, University of California, Davis, CA, 95616, USA
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
| | - Lars Lauterbach
- Department of Chemistry, University of California, Davis, CA, 95616, USA
- Department of Chemistry, Technische Universtät Berlin, Strasse des 17. Juni 135, 10623 Berlin, Germany
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54
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REBACK MATTHEWL, GINOVSKA BOJANA, BUCHKO GARRYW, DUTTA ARNAB, PRIYADARSHANI NILUSHA, KIER BRANDONL, HELM MONTEL, RAUGEI SIMONE, SHAW WENDYJ. Investigating the role of chain and linker length on the catalytic activity of an H 2 production catalyst containing a β-hairpin peptide. J COORD CHEM 2016; 69:1730-1747. [PMID: 33093711 PMCID: PMC7577397 DOI: 10.1080/00958972.2016.1188924] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 03/23/2016] [Indexed: 12/20/2022]
Abstract
Building on our recent report of an active H2 production catalyst [Ni(PPh 2NProp-peptide)2]2+ (Prop = para-phenylpropionic acid, peptide (R10) = WIpPRWTGPR-NH2, p = D-proline and P2N = 1-aza-3,6-diphosphacycloheptane) that contains structured β-hairpin peptides, here we investigate how H2 production is effected by: (1) the length of the hairpin (eight or ten residues) and (2) limiting the flexibility between the peptide and the core complex by altering the length of the linker: para-phenylpropionic acid (three carbons) or para-benzoic acid (one carbon). Reduction of the peptide chain length from ten to eight residues increases or maintains the catalytic current for H2 production for all complexes, suggesting a non-productive steric interaction at longer peptide lengths. While the structure of the hairpin appears largely intact for the complexes, NMR data are consistent with differences in dynamic behavior which may contribute to the observed differences in catalytic activity. Molecular dynamics simulations demonstrate that complexes with a one-carbon linker have the desired effect of restricting the motion of the hairpin relative to the complex; however, the catalytic currents are significantly reduced compared to complexes containing a three-carbon linker as a result of the electron withdrawing nature of the -COOH group. These results demonstrate the complexity and interrelated nature of the outer coordination sphere on catalysis.
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Affiliation(s)
| | - BOJANA GINOVSKA
- Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - GARRY W. BUCHKO
- Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - ARNAB DUTTA
- Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | | | | | - MONTE L. HELM
- Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - SIMONE RAUGEI
- Pacific Northwest National Laboratory, Richland, WA 99352, USA
| | - WENDY J. SHAW
- Pacific Northwest National Laboratory, Richland, WA 99352, USA
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55
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Kandemir B, Kubie L, Guo Y, Sheldon B, Bren KL. Hydrogen Evolution from Water under Aerobic Conditions Catalyzed by a Cobalt ATCUN Metallopeptide. Inorg Chem 2016; 55:1355-7. [DOI: 10.1021/acs.inorgchem.5b02157] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Banu Kandemir
- Department
of Chemistry, University of Rochester, Rochester, New York 14627-0216, United States
| | - Lenore Kubie
- Department
of Chemistry, University of Rochester, Rochester, New York 14627-0216, United States
| | - Yixing Guo
- Department
of Chemistry, University of Rochester, Rochester, New York 14627-0216, United States
| | - Brian Sheldon
- Department
of Chemistry, University of Rochester, Rochester, New York 14627-0216, United States
| | - Kara L. Bren
- Department
of Chemistry, University of Rochester, Rochester, New York 14627-0216, United States
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56
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Kandemir B, Chakraborty S, Guo Y, Bren KL. Semisynthetic and Biomolecular Hydrogen Evolution Catalysts. Inorg Chem 2015; 55:467-77. [DOI: 10.1021/acs.inorgchem.5b02054] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Banu Kandemir
- Department of Chemistry, University of Rochester, Rochester New York 14627-0216, United States
| | - Saikat Chakraborty
- Department of Chemistry, University of Rochester, Rochester New York 14627-0216, United States
| | - Yixing Guo
- Department of Chemistry, University of Rochester, Rochester New York 14627-0216, United States
| | - Kara L. Bren
- Department of Chemistry, University of Rochester, Rochester New York 14627-0216, United States
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57
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Behnke SL, Shafaat HS. Heterobimetallic Models of the [NiFe] Hydrogenases: A Structural and Spectroscopic Comparison. COMMENT INORG CHEM 2015. [DOI: 10.1080/02603594.2015.1108914] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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