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Nastasi F, Santoro A, Serroni S, Campagna S, Kaveevivitchai N, Thummel RP. Early photophysical events of a ruthenium(ii) molecular dyad capable of performing photochemical water oxidation and of its model compounds. Photochem Photobiol Sci 2019; 18:2164-2173. [PMID: 30793142 DOI: 10.1039/c8pp00530c] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The early photophysical events occurring in the dinuclear metal complex [(ttb-terpy)(I)Ru(μ-dntpz)Ru(bpy)2]3+ (2; ttb-terpy = 4,4',4''-tri-tert-butyl-terpy; bpy = 2,2'-bipyridine; dntpz = 2,5-di-(1,8-dinaphthyrid-2-yl)pyrazine) - a species containing the chromophoric {(bpy)2Ru(μ-dntpz)}2+ subunit and the catalytic {(I)(ttb-terpy)Ru(μ-dntpz)}+ unit, already reported to be able to perform photocatalytic water oxidation - have been studied by ultrafast pump-probe spectroscopy in acetonitrile solution. The model species [Ru(bpy)2(dntpz)]2+ (1), [(bpy)2Ru(μ-dntpz)Ru(bpy)2]4+ (3), and [(ttb-terpy)(I)Ru((μ-dntpz)Ru[(ttb-terpy)(I)]2+ (4) have also been studied. For completeness, the absorption spectra, redox behavior of 1-4 and the spectroelectrochemistry of the dinuclear species 2-4 have been investigated. The usual 3MLCT (metal-to-ligand charge transfer) decay, characterized by relatively long lifetimes on the ns timescale, takes place in 1 and 3, whose lowest-energy level involves a {(bpy)2Ru(dntpz)}2+ unit, whereas for 2 and 4, whose lowest-energy excited state involves a 3MLCT centered on the {(I)(ttb-terpy)Ru(μ-dntpz)}+ subunit, the excited-state lifetimes are on the ps timescale, possibly involving population of a low-lying 3MC (metal-centered) level. Compound 2 also exhibits a fast process, with a time constant of 170 fs, which is attributed to intercomponent energy transfer from the MLCT state centered in the {(bpy)2Ru(μ-dntpz)}2+ unit to the MLCT state involving the {(I)(ttb-terpy)Ru(μ-dntpz)}+ unit. Both the intercomponent energy transfer and the MLCT-to-MC activation process take place from non-equilibrated MLCT states.
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Affiliation(s)
- Francesco Nastasi
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, and Centro Interuniversitario per la Conversione Chimica dell'Energia Solare (SOLARCHEM, sezione di Messina), 98166 Messina, Italy
| | - Antonio Santoro
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, and Centro Interuniversitario per la Conversione Chimica dell'Energia Solare (SOLARCHEM, sezione di Messina), 98166 Messina, Italy
| | - Scolastica Serroni
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, and Centro Interuniversitario per la Conversione Chimica dell'Energia Solare (SOLARCHEM, sezione di Messina), 98166 Messina, Italy
| | - Sebastiano Campagna
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, and Centro Interuniversitario per la Conversione Chimica dell'Energia Solare (SOLARCHEM, sezione di Messina), 98166 Messina, Italy
| | - Nattawut Kaveevivitchai
- Department of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, USA
| | - Randolph P Thummel
- Department of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, USA
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Singh S, Raghuvanshi A, Mathur P, Singh AK. Coordination behaviour of 2-(Methylthio)Pyrazine with Ag(I) in the presence of different counter anions and emission properties. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.04.064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Kohler L, Kaveevivitchai N, Zong R, Thummel RP. Component Analysis of Dyads Designed for Light-Driven Water Oxidation. Inorg Chem 2013; 53:912-21. [DOI: 10.1021/ic4022905] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lars Kohler
- Department of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, United States
| | - Nattawut Kaveevivitchai
- Department of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, United States
| | - Ruifa Zong
- Department of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, United States
| | - Randolph P. Thummel
- Department of Chemistry, University of Houston, 112 Fleming Building, Houston, Texas 77204-5003, United States
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Kaveevivitchai N, Chitta R, Zong R, El Ojaimi M, Thummel RP. A Molecular Light-Driven Water Oxidation Catalyst. J Am Chem Soc 2012; 134:10721-4. [DOI: 10.1021/ja300797g] [Citation(s) in RCA: 138] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nattawut Kaveevivitchai
- Department of Chemistry,
136 Fleming Building, University of Houston, Houston, Texas 77204-5003, United
States
| | - Raghu Chitta
- Department of Chemistry,
136 Fleming Building, University of Houston, Houston, Texas 77204-5003, United
States
| | - Ruifa Zong
- Department of Chemistry,
136 Fleming Building, University of Houston, Houston, Texas 77204-5003, United
States
| | - Maya El Ojaimi
- Department of Chemistry,
136 Fleming Building, University of Houston, Houston, Texas 77204-5003, United
States
| | - Randolph P. Thummel
- Department of Chemistry,
136 Fleming Building, University of Houston, Houston, Texas 77204-5003, United
States
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Shiri M, Zolfigol MA, Kruger HG, Tanbakouchian Z. Friedländer Annulation in the Synthesis of Azaheterocyclic Compounds. ADVANCES IN HETEROCYCLIC CHEMISTRY 2011. [DOI: 10.1016/b978-0-12-385464-3.00002-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Singh AN, Thummel RP. 1,5-Naphthyridine As a New Linker for the Construction of Bridging Ligands and Their Corresponding Ru(II) Complexes. Inorg Chem 2009; 48:6459-70. [DOI: 10.1021/ic900400t] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ajay N. Singh
- Department of Chemistry, 136 Fleming Building, University of Houston, Houston, Texas 77204-5003
| | - Randolph P. Thummel
- Department of Chemistry, 136 Fleming Building, University of Houston, Houston, Texas 77204-5003
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MaŁecki JG, Kruszynski R. Synthesis, crystal and spectroscopic characterization of [RuHCl(CO)(PPh3)2(pyrazine)]. J COORD CHEM 2007. [DOI: 10.1080/00958970701239580] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- J. G. MaŁecki
- a Department of Inorganic and Coordination Chemistry , Institute of Chemistry, University of Silesia , 9th Szkolna St., 40-006 Katowice, Poland
| | - R. Kruszynski
- b X-Ray Crystallography Laboratory , Institute of General and Ecological Chemistry, Technical University of Łódź , 116 Żeromski St., 90-924 Łódź, Poland
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Chapter 6.2 Six-membered ring systems: Diazines and benzo derivatives. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/s0959-6380(05)80055-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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