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Khan AAT, Gobeze HB, Islam T, Arman HD, Schanze KS. Effect of bromine substitution on blue phosphorescent trans-(N-heterocyclic carbene)Pt(II) acetylide complexes. Dalton Trans 2023; 52:11535-11542. [PMID: 37540137 DOI: 10.1039/d3dt01483e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
N-heterocyclic carbene complexes of the type trans-(NHC)2PtII(CC-Ar)2 (where Ar = phenyl or substituted phenyl) are of interest as violet and blue phosphors. These complexes emit efficient phosphorescence in solution and in the solid state, and they have been applied as phosphors in organic light emitting diodes. This study explores the effect of bromine substitution on the trans-(NHC)2PtII(CC-Ar)2 chromophore through photophysical studies of a pair of complexes in which the phenyl groups feature either 3,5-dibromo- or 4-monobromo-substituents (IPt-DB and IPt-MB, respectively). The Br atoms were introduced as heavy atom(s) with the aim to enhance spin-orbit coupling and increase the radiative and non-radiative decay rates of the phosphorescent triplet state. Both IPt-MB and IPt-DB exhibit sky-blue phosphorescence in solution and in PMMA matrix. Interestingly, the emission quantum yield and lifetime of IPt-MB are substantially lower compared to IPt-DB in solution. This effect is attributed to a substantially larger non-radiative decay rate in the mono-bromo complex. Analysis of the photophysical data, combined with DFT and TD-DFT calculations, suggest that the difference in photophysical properties of the two complexes is related to the position of the Br-substituents on the phenyl acetylide rings. In short, in IPt-MB, the Br-substituents are located para-to the Pt-CC-unit, and this gives rise to stronger electron-vibrational coupling in the excited state, enhancing the rate of non-radiative decay.
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Affiliation(s)
- Amran A T Khan
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA.
| | - Habtom B Gobeze
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA.
| | - Tanjila Islam
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA.
| | - Hadi D Arman
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA.
| | - Kirk S Schanze
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA.
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2
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Bennett TLR, Wilkinson LA, Lok JMA, O’Toole RCP, Long NJ. Synthesis, Electrochemistry, and Optical Properties of Highly Conjugated Alkynyl-Ferrocenes and -Biferrocenes. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00098] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Troy L. R. Bennett
- Department of Chemistry, Imperial College London, MSRH, White City Campus, London W12 0BZ, U.K
| | - Luke A. Wilkinson
- Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | - Jasmine M. A. Lok
- Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K
| | | | - Nicholas J. Long
- Department of Chemistry, Imperial College London, MSRH, White City Campus, London W12 0BZ, U.K
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3
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Harrison DP, Kumar VJ, Noppers JN, Gluyas JBG, Sobolev AN, Moggach SA, Low PJ. Iron vs. ruthenium: syntheses, structures and IR spectroelectrochemical characterisation of half-sandwich Group 8 acetylide complexes. NEW J CHEM 2021. [DOI: 10.1039/d0nj03093g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A synthetic ‘trick’ affording complexes [M(CCR)(dppe)Cp′] (M = Fe, Ru) in high purity directly from the reaction vessel is described.
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Affiliation(s)
- Daniel P. Harrison
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia, 6009, Australia
| | - Varshini J. Kumar
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia, 6009, Australia
| | - Johanna N. Noppers
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia, 6009, Australia
| | - Josef B. G. Gluyas
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia, 6009, Australia
| | - Alexandre N. Sobolev
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia, 6009, Australia
| | - Stephen A. Moggach
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia, 6009, Australia
| | - Paul J. Low
- School of Molecular Sciences, University of Western Australia, 35 Stirling Highway, Crawley, Western Australia, 6009, Australia
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Carter C, Kratish Y, Jurca T, Gao Y, Marks TJ. Bis-Ferrocenyl-Pyridinediimine Trinuclear Mixed-Valent Complexes with Metal-Binding Dependent Electronic Coupling: Synthesis, Structures, and Redox-Spectroscopic Characterization. J Am Chem Soc 2020; 142:18715-18729. [DOI: 10.1021/jacs.0c10015] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Cole Carter
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208−3113, United States
| | - Yosi Kratish
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208−3113, United States
| | - Titel Jurca
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208−3113, United States
| | - Yanshan Gao
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208−3113, United States
| | - Tobin J. Marks
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208−3113, United States
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Makhoul R, Groizard T, Hamon P, Roisnel T, Dorcet V, Kahlal S, Halet J, Hamon J, Lapinte C. 1,4‐Diethynylbenzene‐Bridged [Cp*(dppe)Fe]
n+
Units: Effect of 2,5‐Ethynyl Groups on the Chemical and Electronic Properties. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000345] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Rim Makhoul
- CNRS, ISCR‐UMR 6226 Univ Rennes 35000 Rennes France
| | | | - Paul Hamon
- CNRS, ISCR‐UMR 6226 Univ Rennes 35000 Rennes France
| | | | | | - Samia Kahlal
- CNRS, ISCR‐UMR 6226 Univ Rennes 35000 Rennes France
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6
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Gendron F, Groizard T, Le Guennic B, Halet JF. Electronic Properties of Poly-Yne Carbon Chains and Derivatives with Transition Metal End-Groups. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.201901112] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Frédéric Gendron
- ISCR (Institut des Sciences Chimiques de Rennes); Univ Rennes, CNRS; UMR 6226, F -35000 Rennes France
| | - Thomas Groizard
- ISCR (Institut des Sciences Chimiques de Rennes); Univ Rennes, CNRS; UMR 6226, F -35000 Rennes France
| | - Boris Le Guennic
- ISCR (Institut des Sciences Chimiques de Rennes); Univ Rennes, CNRS; UMR 6226, F -35000 Rennes France
| | - Jean-François Halet
- ISCR (Institut des Sciences Chimiques de Rennes); Univ Rennes, CNRS; UMR 6226, F -35000 Rennes France
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7
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Affiliation(s)
- Jean-Pierre Launay
- CEMES-CNRS; Université de Toulouse; 29 rue Jeanne Marvig 31055 Toulouse France
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8
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Herndon JW. The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2018. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.213051] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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9
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Azbell TJ, Banziger SD, Mash BL, Ren T. Co(cyclam) alkynyl complexes of gem-DEE-aryl: Synthesis, molecular and electronic structures. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.06.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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10
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Natoli SN, Zeller M, Ren T. A Family of Cross-Conjugated Polyenynes Capped by CoIII(cyclam): Syntheses, Molecular and Electronic Structures. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00313] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sean N. Natoli
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Matthias Zeller
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Tong Ren
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
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11
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Abstract
The reactions of [W(CBr)(CO)2(Tp*)] with a range of terminal alkynes (RCCH), mediated by [Pd(PPh3)4] and CuI, afford new propargylidynes [W(C–CCR)(CO)2(Tp*)] [R = tBu, C6H4X (X = H, NH2, NO2), APh3 (A = C, Si, Ge), B(O2CCH2)2NMe].
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Affiliation(s)
- Anthony F. Hill
- Research School of Chemistry
- The Australian National University
- Canberra
- Australia
| | - Richard A. Manzano
- Research School of Chemistry
- The Australian National University
- Canberra
- Australia
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