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Mala B, Murtagh LE, Farrow CMA, Akien GR, Halcovich NR, Allinson SL, Platts JA, Coogan MP. Photochemical Oxidation of Pt(IV)Me 3(1,2-diimine) Thiolates to Luminescent Pt(IV) Sulfinates. Inorg Chem 2021; 60:7031-7043. [PMID: 33900771 DOI: 10.1021/acs.inorgchem.0c03553] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the formation of dinuclear complexes from, and photochemical oxidation of, (CH3)3-Pt(IV)(N^N) (N^N = 1,2-diimine derivatives) complexes of thiophenolate ligands to the analogous sulfinates (CH3)3Pt(N^N)(SO2Ph) and structural, spectroscopic, and theoretical studies of the latter revealing tunable photophysics depending upon the 1,2-diimine ligands. Electron-rich thiolate and conjugated 1,2-diimines encourage formation of thiolate-bridged dinuclear complexes; smaller 1,2-diimines or electron-poor thiolates favor mononuclear complexes. Photooxidation of the thiolate ligand yields hitherto unreported Pt(IV)-SO2R complexes, promoted by electron-deficient thiolates such as 4-nitrothiophenol, which exclusively forms the sulfinate complex. Such complexes exhibit expected absorptions due to π-π* ligand transitions of the 1,2-diimines mixed with spin-allowed singlet MLCT (d-π*) at relatively high energy (270-290 nm), as well as unexpected broad, lower energy absorptions between 360 and 490 nm. DFT data indicate that these low energy absorption bands result from excitation of Pt-S and Pt-C σ-bonding electrons to π* orbitals on sulfinate and 1,2-diimine, the latter of which gives rise to emission in the visible range.
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Affiliation(s)
- Barbora Mala
- Department of Chemistry, University of Lancaster, Lancaster, LA1 4YB, United Kingdom
| | - Laura E Murtagh
- Department of Chemistry, University of Lancaster, Lancaster, LA1 4YB, United Kingdom
| | - Charlotte M A Farrow
- Department of Chemistry, University of Lancaster, Lancaster, LA1 4YB, United Kingdom
| | - Geoffrey R Akien
- Department of Chemistry, University of Lancaster, Lancaster, LA1 4YB, United Kingdom
| | - Nathan R Halcovich
- Department of Chemistry, University of Lancaster, Lancaster, LA1 4YB, United Kingdom
| | - Sarah L Allinson
- Department of Biomedical and Life Sciences, University of Lancaster, Lancaster, LA1 4YG, United Kingdom
| | - James A Platts
- School of Chemistry, Cardiff University, Park Place, Cardiff, CF10 3AT, United Kingdom
| | - Michael P Coogan
- Department of Chemistry, University of Lancaster, Lancaster, LA1 4YB, United Kingdom
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Werkema EL, Andersen RA, Maron L, Eisenstein O. The reaction of bis(1,2,4-tri-t-butylcyclopentadienyl)ceriumbenzyl, Cp′2CeCH2Ph, with methylhalides: a metathesis reaction that does not proceed by a metathesis transition state. Dalton Trans 2010; 39:6648-60. [DOI: 10.1039/b918103b] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ishii A, Yamaguchi Y, Nakata N. Thermal reaction of a (hydrido)(selenolato)platinum(ii) complex having a dibenzobarrelenyl group leading to three cyclometalations. Dalton Trans 2010; 39:6181-3. [DOI: 10.1039/c0dt00483a] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Zahn I, Polborn K, Wagner B, Beck W. Metallkomplexe mit biologisch wichtigen Liganden, LVIII.C-Allylglycin- undC-Vinylglycin-Komplexe von Palladium(II), Platin(II), Rhodium(III), Iridium(III) und deren Reaktionen mit Nucleophilen. ACTA ACUST UNITED AC 1991. [DOI: 10.1002/cber.19911240513] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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