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Schuman AJ, Robey SFT, Judkins EC, Zeller M, Ren T. A unique series of chromium(iii) mono-alkynyl complexes supported by tetraazamacrocycles. Dalton Trans 2021; 50:4936-4943. [PMID: 33877191 DOI: 10.1039/d1dt00707f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Described herein is the synthesis and characterization of macrocyclic CrIII mono-alkynyl complexes. By using the meso-form of the tetraazamacrocycle HMC (HMC = 5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane), trans-[Cr(HMC)(C2Ph)Cl]OTf (1a), trans-[Cr(HMC)(C2Np)Cl]OTf (2a), trans-[Cr(HMC)(C2C6H4tBu)Cl]OTf (3a), and trans-[Cr(HMC)(C2(3,5-Cl2C6H3))Cl]OTf (4a) complexes have been realized. These complexes were synthesized in high yield through the reaction of trans-[Cr(meso-HMC)(C2Ar)2]OTf (1b-4b) with stoichiometric amounts of methanolic HCl. Single crystal X-ray diffraction showed that the trans-stereochemistry and pseudo-octahedral geometry is retained in the desired mono-alkynyl complexes. The absorption spectra of complexes 1a-4a display d-d bands with distinct vibronic progressions that are slightly red shifted from trans-[Cr(HMC)(C2Ar)2]+ with approximately halved molar extinction coefficients. Time-delayed measurements of the emission spectra for complexes 1a-4a at 77 K revealed phosphorescence with lifetimes ranging between 343 μs (4a) and 397 μs (1a). The phosphorescence spectra of 1a-4a also exhibit more structuring than the bis-alkynyl complexes due to a strengthened vibronic coupling between the CrIII metal center and alkynyl ligands.
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Affiliation(s)
- Ashley J Schuman
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, USA.
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2
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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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3
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Li P, Yang Z, Zhang Z, Pu L, King RB. Understanding the singlet–triplet energy splittings in transition metal-capped carbon chains. Phys Chem Chem Phys 2020; 22:2858-2869. [DOI: 10.1039/c9cp06591a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Density functional theory and molecular orbital analysis suggest that the odd–even alternation of singlet–triplet energy separations is a general feature of transition metal-capped carbon chains, determined primarily by the carbon chains.
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Affiliation(s)
- Peizhi Li
- College of Chemistry & Pharmacy
- Northwest A&F University
- Yangling
- P. R. China
| | - Zhipeng Yang
- College of Chemistry & Pharmacy
- Northwest A&F University
- Yangling
- P. R. China
| | - Zhong Zhang
- College of Chemistry & Pharmacy
- Northwest A&F University
- Yangling
- P. R. China
| | - Liang Pu
- College of Chemistry & Pharmacy
- Northwest A&F University
- Yangling
- P. R. China
| | - R. Bruce King
- Department of Chemistry and Center for Computational Chemistry
- University of Georgia
- Athens
- USA
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Pu L, Zhang Z, King RB, Allen WD. Most favorable cumulenic structures in iron-capped linear carbon chains are short singlet odd-carbon dications: a theoretical view. Phys Chem Chem Phys 2018; 20:15496-15506. [DOI: 10.1039/c7cp08673c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
DFT computations suggest that the odd iron-capped linear-carbon dications exhibit large ΔES–T values and more cumulenic structures than short even-carbon chains.
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Affiliation(s)
- Liang Pu
- College of Chemistry & Pharmacy
- Northwest A&F University
- Yangling
- P. R. China
| | - Zhong Zhang
- College of Chemistry & Pharmacy
- Northwest A&F University
- Yangling
- P. R. China
| | - R. Bruce King
- Department of Chemistry and Center for Computational Chemistry
- University of Georgia
- Athens
- USA
| | - Wesley D. Allen
- Department of Chemistry and Center for Computational Chemistry
- University of Georgia
- Athens
- USA
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Barbour JC, Kim AJI, deVries E, Shaner SE, Lovaasen BM. Chromium(III) Bis-Arylterpyridyl Complexes with Enhanced Visible Absorption via Incorporation of Intraligand Charge-Transfer Transitions. Inorg Chem 2017; 56:8212-8222. [PMID: 28665604 DOI: 10.1021/acs.inorgchem.7b00953] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A series of chromium(III) bis-arylterpyridyl complexes containing intraligand charge-transfer (ILCT) excited states were prepared and characterized. These complexes show significant absorption in the visible region due to the ILCT bands. The ILCT bands are tunable across the UV and visible spectrum via incorporation of electron-withdrawing and electron-donating groups on the aryl ring. The absorption of Cr(4'-(4-methoxyphenyl)-2,2':6',2″-terpyridine)23+ (4) in particular is much stronger in the visible region (ε = 11 900 M-1 cm-1 at 450 nm and ε = 5090 M-1 cm-1 at 500 nm) than that of the parent complex Cr(tpy)23+ (tpy = 2,2':6',2″-terpyridine; ε = 2160 M-1 cm-1 at 450 nm, and ε = 170 M-1 cm-1 at 500 nm). Emission experiments on this series reveal Cr(III)-based phosphorescence with lifetimes from 140 to 600 ns upon excitation into the ILCT bands, which indicates funneling of the excitation energy from ligand-localized excited states to Cr(III)-based excited states. Cyclic voltammograms exhibit at least three reversible ligand-based reductions. The first reduction shows shifts of up to -160 mV compared to Cr(tpy)23+. The excited-state reduction potential of these complexes ranges from +0.95 to +1.04 V vs the ferrocene/ferrocenium couple, making them potent photooxidants.
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Affiliation(s)
- Johanna C Barbour
- Department of Chemistry, Wheaton College , 501 College Avenue, Wheaton, Illinois 60187, United States
| | - Amy J I Kim
- Department of Chemistry, Wheaton College , 501 College Avenue, Wheaton, Illinois 60187, United States
| | - Elsemarie deVries
- Department of Chemistry, Wheaton College , 501 College Avenue, Wheaton, Illinois 60187, United States
| | - Sarah E Shaner
- Department of Chemistry, Benedictine University , 5700 College Road, Lisle, Illinois 60532, United States
| | - Benjamin M Lovaasen
- Department of Chemistry, Wheaton College , 501 College Avenue, Wheaton, Illinois 60187, United States
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Tyler SF, Judkins EC, Song Y, Cao F, McMillin DR, Fanwick PE, Ren T. Cr(III)-HMC (HMC = 5,5,7,12,12,14-Hexamethyl-1,4,8,11-tetraazacyclotetradecane) Alkynyl Complexes: Preparation and Emission Properties. Inorg Chem 2016; 55:8736-43. [PMID: 27529498 DOI: 10.1021/acs.inorgchem.6b01285] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sarah F. Tyler
- Department
of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Eileen C. Judkins
- Department
of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - You Song
- School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Fan Cao
- School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - David R. McMillin
- Department
of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Phillip E. Fanwick
- 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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Cook TD, Natoli SN, Fanwick PE, Ren T. CoIII(cyclam) Oligoynyls: Monomeric Oligoynyl Complexes and Dimeric Complexes with an Oligoyn-diyl Bridge. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00219] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Timothy D. Cook
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Sean N. Natoli
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Phillip E. Fanwick
- 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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Cook TD, Natoli SN, Fanwick PE, Ren T. Dimeric Complexes of CoIII(cyclam) with a Polyynediyl Bridge. Organometallics 2015. [DOI: 10.1021/om501272p] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Timothy D. Cook
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Sean N. Natoli
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Phillip E. Fanwick
- 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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Baranová Z, Amini H, Bhuvanesh N, Gladysz JA. Rotaxanes Derived from Dimetallic Polyynediyl Complexes: Extended Axles and Expanded Macrocycles. Organometallics 2014. [DOI: 10.1021/om501026u] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Zuzana Baranová
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
| | - Hashem Amini
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
| | - Nattamai Bhuvanesh
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
| | - John A. Gladysz
- Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, United States
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Herndon JW. The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2012. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2014.02.026] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Cook TD, Fanwick PE, Ren T. Unsymmetric Mononuclear and Bridged Dinuclear CoIII(cyclam) Acetylides. Organometallics 2014. [DOI: 10.1021/om401231j] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Timothy D. Cook
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47906, United States
| | - Phillip E. Fanwick
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47906, United States
| | - Tong Ren
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47906, United States
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12
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Twists and turns: Studies of the complexes and properties of bimetallic complexes featuring phenylene ethynylene and related bridging ligands. Coord Chem Rev 2013. [DOI: 10.1016/j.ccr.2012.08.008] [Citation(s) in RCA: 141] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Lissel F, Fox T, Blacque O, Polit W, Winter RF, Venkatesan K, Berke H. Stepwise Construction of an Iron-Substituted Rigid-Rod Molecular Wire: Targeting a Tetraferra–Tetracosa–Decayne. J Am Chem Soc 2013; 135:4051-60. [DOI: 10.1021/ja400078c] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Franziska Lissel
- Institute of Inorganic Chemistry, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
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Bruce MI, Le Guennic B, Scoleri N, Zaitseva NN, Halet JF. Extending Metal-Capped Polyynediyl Molecular Wires by Insertion of Inorganic Metal Units. Organometallics 2012. [DOI: 10.1021/om3000949] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Michael I. Bruce
- School of Chemistry & Physics, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Boris Le Guennic
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, F-35042
Rennes Cedex, France
| | - Nancy Scoleri
- School of Chemistry & Physics, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Natasha N. Zaitseva
- School of Chemistry & Physics, University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Jean-François Halet
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes 1, F-35042
Rennes Cedex, France
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