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Velasco L, Liu C, Zhang X, Grau S, Gil-Sepulcre M, Gimbert-Suriñach C, Picón A, Llobet A, DeBeer S, Moonshiram D. Mapping the Ultrafast Mechanistic Pathways of Co Photocatalysts in Pure Water through Time-Resolved X-ray Spectroscopy. CHEMSUSCHEM 2023; 16:e202300719. [PMID: 37548998 DOI: 10.1002/cssc.202300719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 07/28/2023] [Accepted: 08/07/2023] [Indexed: 08/08/2023]
Abstract
Nanosecond time-resolved X-ray (tr-XAS) and optical transient absorption spectroscopy (OTA) are applied to study 3 multimolecular photocatalytic systems with [Ru(bpy)3 ]2+ photoabsorber, ascorbic acid electron donor and Co catalysts with methylene (1), hydroxomethylene (2) and methyl (3) amine substituents in pure water. OTA and tr-XAS of 1 and 2 show that the favored catalytic pathway involves reductive quenching of the excited photosensitizer and electron transfer to the catalyst to form a CoII square pyramidal intermediate with a bonded aqua molecule followed by a CoI square planar derivative that decays within ≈8 μs. By contrast, a CoI square pyramidal intermediate with a longer decay lifetime of ≈35 μs is formed from an analogous CoII geometry for 3 in H2 O. These results highlight the protonation of CoI to form the elusive hydride species to be the rate limiting step and show that the catalytic rate can be enhanced through hydrogen containing pendant amines that act as H-H bond formation proton relays.
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Grants
- RYC2020-029863-I Ramon y Cajal grant
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Cientificas (CSIC-ICMM)
- PIE grant
- 20226AT001 CSIC-ICMM
- PID2019-111086RA-I00 Spanish Ministerio de Ciencia, Innovación y Universidades grants
- TED2021-132757B-I00 Spanish Ministerio de Ciencia, Innovación y Universidades grants
- PID2022-143013OB-I00 Spanish Ministerio de Ciencia, Innovación y Universidades grants
- DE-AC02-06CH11357 DOE, Office of Science, Basic Energy Sciences, Chemical Sciences, Geosciences, and Biosciences Division
- PID2021-126560NB-I00 DOE, Office of Science, Basic Energy Sciences, Chemical Sciences, Geosciences, and Biosciences Division
- 2017-T1/IND-5432 MCIU/AEI/FEDER, UE
- 2021-5A/IND-20959 MCIU/AEI/FEDER, UE
- Comunidad de Madrid through TALENTO program
- Max Planck Society
- RYC2019-027423-I Ramon y Cajal grant
- PID2019-111617RB-I00 Ministerio de Ciencia e Innovación
- MCIN/AEI/10.13039/501100011033 Ministerio de Ciencia e Innovación
- SO-CEX2019-000925-S Ministerio de Ciencia e Innovación
- MCIN/AEI/10.13039/5011000110 Ministerio de Ciencia e Innovación
- Advanced Photon Source (APS); a U.S. Department of Energy (DOE) Office of Science User Facility
- DE-AC02-06CH11357 Argonne National Laboratory
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Affiliation(s)
- Lucia Velasco
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Sor Juana Inés de la Cruz, 3, 28049, Madrid, Spain
| | - Cunming Liu
- X-ray Science Division, Argonne National Laboratory, 9700 S. Cass Avenue, Lemont IL, 60439, U.S.A
| | - Xiaoyi Zhang
- X-ray Science Division, Argonne National Laboratory, 9700 S. Cass Avenue, Lemont IL, 60439, U.S.A
| | - Sergi Grau
- Institute of Chemical Research of Catalonia (ICIQ), Avinguda Països Catalans 16, 43007, Tarragona, Spain
| | - Marcos Gil-Sepulcre
- Institute of Chemical Research of Catalonia (ICIQ), Avinguda Països Catalans 16, 43007, Tarragona, Spain
| | - Carolina Gimbert-Suriñach
- Institute of Chemical Research of Catalonia (ICIQ), Avinguda Països Catalans 16, 43007, Tarragona, Spain
- Departament de Química, Universitat Autònoma de Barcelona Cerdanyola del Vallès, 08193, Barcelona, Spain
| | - Antonio Picón
- Departamento de Química, Universidad Autonoma de Madrid, 28049, Madrid, Spain
| | - Antoni Llobet
- Institute of Chemical Research of Catalonia (ICIQ), Avinguda Països Catalans 16, 43007, Tarragona, Spain
- Departament de Química, Universitat Autònoma de Barcelona Cerdanyola del Vallès, 08193, Barcelona, Spain
| | - Serena DeBeer
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470, Mülheim an der Ruhr, Germany
| | - Dooshaye Moonshiram
- Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Sor Juana Inés de la Cruz, 3, 28049, Madrid, Spain
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Kinigstein ED, Otolski C, Jennings G, Doumy G, Walko DA, Zuo X, Guo J, March AM, Zhang X. Asynchronous x-ray multiprobe data acquisition for x-ray transient absorption spectroscopy. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2023; 94:014714. [PMID: 36725554 DOI: 10.1063/5.0100596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 01/05/2023] [Indexed: 06/18/2023]
Abstract
Laser pump X-ray Transient Absorption (XTA) spectroscopy offers unique insights into photochemical and photophysical phenomena. X-ray Multiprobe data acquisition (XMP DAQ) is a technique that acquires XTA spectra at thousands of pump-probe time delays in a single measurement, producing highly self-consistent XTA spectral dynamics. In this work, we report two new XTA data acquisition techniques that leverage the high performance of XMP DAQ in combination with High Repetition Rate (HRR) laser excitation: HRR-XMP and Asynchronous X-ray Multiprobe (AXMP). HRR-XMP uses a laser repetition rate up to 200 times higher than previous implementations of XMP DAQ and proportionally increases the data collection efficiency at each time delay. This allows HRR-XMP to acquire more high-quality XTA data in less time. AXMP uses a frequency mismatch between the laser and x-ray pulses to acquire XTA data at a flexibly defined set of pump-probe time delays with a spacing down to a few picoseconds. AXMP introduces a novel pump-probe synchronization concept that acquires data in clusters of time delays. The temporally inhomogeneous distribution of acquired data improves the attainable signal statistics at early times, making the AXMP synchronization concept useful for measuring sub-nanosecond dynamics with photon-starved techniques like XTA. In this paper, we demonstrate HRR-XMP and AXMP by measuring the laser-induced spectral dynamics of dilute aqueous solutions of Fe(CN)6 4- and [FeII(bpy)3]2+ (bpy: 2,2'-bipyridine), respectively.
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Affiliation(s)
- Eli Diego Kinigstein
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, USA
| | - Christopher Otolski
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, USA
| | - Guy Jennings
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, USA
| | - Gilles Doumy
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, USA
| | - Donald A Walko
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, USA
| | - Xiaobing Zuo
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, USA
| | - Jinghua Guo
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94702, USA
| | - Anne Marie March
- Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, USA
| | - Xiaoyi Zhang
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Ave., Lemont, Illinois 60439, USA
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Velasco L, Llanos L, Levín P, Vega A, Yu J, Zhang X, Lemus L, Aravena D, Moonshiram D. Structure and excited-state dynamics of dimeric copper(i) photosensitizers investigated by time-resolved X-ray and optical transient absorption spectroscopy. Phys Chem Chem Phys 2021; 23:3656-3667. [PMID: 33527942 DOI: 10.1039/d0cp06080a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Time-resolved X-ray (tr-XAS) and optical transient absorption (OTA) spectroscopy in the picosecond time scale coupled with Density Functional theory (DFT) and X-ray absorption near-edge structure (XANES) calculations are applied to study three homoleptic Cu(i) dimeric chromophores with ethyl and longer propyl spacers, denoted as [Cu2(mphenet)2]Cl2 (C1), [Cu2(mphenet)2](ClO4)2 (C2) and [Cu2(mphenpr)2](ClO4)2 (C3) (where mphenet = 1,2-bis(9-methyl-1,10-phenanthrolin-2-yl)ethane and mphenpr = 1,3-bis(9-methyl-1,10-phenanthrolin-2-yl)propane). Tr-XAS analysis after light illumination at ∼ 100 ps illustrate the formation of a flattened triplet excited state in all 3 complexes. Optical transient absorption (OTA) analysis for C1 monitored in water and C2 and C3 measured in acetonitrile reveals distinct excited-state lifetimes of 169 ps, 670 ps and 1600 ps respectively. These differences are associated to changes in the solvent (comparing C1 and C2) and the flexibility of the ligand to adapt after Cu flattening upon excitation (C2 and C3). Our results are important for the improved structural dynamics of these types of Cu-based dimeric compounds, and can guide the integration of these chromophores into more complex solar energy conversion schemes.
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Affiliation(s)
- Lucía Velasco
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nanociencia), Calle Faraday, 9, 28049 Madrid, Spain.
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Moonshiram D, Garrido‐Barros P, Gimbert‐Suriñach C, Picón A, Liu C, Zhang X, Karnahl M, Llobet A. Elucidating the Nature of the Excited State of a Heteroleptic Copper Photosensitizer by using Time‐Resolved X‐ray Absorption Spectroscopy. Chemistry 2018; 24:6464-6472. [DOI: 10.1002/chem.201800330] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Dooshaye Moonshiram
- Max Planck Institute for Chemical Energy Conversion Stiftstrasse 34–36 Mülheim an der Ruhr 45470 Germany
- Institute of Chemical Research of Catalonia (ICIQ) Avinguda Països Catalans 16 43007 Tarragona Spain
| | - Pablo Garrido‐Barros
- Institute of Chemical Research of Catalonia (ICIQ) Avinguda Països Catalans 16 43007 Tarragona Spain
- Departament de Química Física i Inorganica Universitat Rovira i Virgili Campus Sescelades, C/Marcellí Domingo, s/n 43007 Tarragona Spain
| | - Carolina Gimbert‐Suriñach
- Institute of Chemical Research of Catalonia (ICIQ) Avinguda Països Catalans 16 43007 Tarragona Spain
| | - Antonio Picón
- Grupo de Investigacion en Aplicaciones del Laser y Fotonica Universidad de Salamanca 37008 Salamanca Spain
- Departamento de Química, Modulo 13 Universidad Autónoma de Madrid Cantoblanco 28049 Madrid Spain
| | - Cunming Liu
- X-ray Science Division Argonne National Laboratory 9700 S. Cass Avenue Lemont IL 60439 USA
| | - Xiaoyi Zhang
- X-ray Science Division Argonne National Laboratory 9700 S. Cass Avenue Lemont IL 60439 USA
| | - Michael Karnahl
- University of Stuttgart Institute of Organic Chemistry Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Antoni Llobet
- Institute of Chemical Research of Catalonia (ICIQ) Avinguda Països Catalans 16 43007 Tarragona Spain
- Departament de Química Universitat Autonoma de Barcelona 08193 Cerdanyola del Valles Barcelona Spain
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