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Krechkivska O, Wilcox CM, Nauta K, Kable SH, Schmidt TW. Quantum-Induced Symmetry Breaking in the Deuterated Dihydroanthracenyl Radical. J Phys Chem A 2019; 123:6711-6719. [DOI: 10.1021/acs.jpca.9b04561] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Olha Krechkivska
- School of Chemistry, University of New South Wales Sydney, NSW 2052, Australia
| | - Callan M. Wilcox
- School of Chemistry, University of New South Wales Sydney, NSW 2052, Australia
| | - Klaas Nauta
- School of Chemistry, University of New South Wales Sydney, NSW 2052, Australia
| | - Scott H. Kable
- School of Chemistry, University of New South Wales Sydney, NSW 2052, Australia
| | - Timothy W. Schmidt
- ARC Centre of Excellence in Exciton Science, School of Chemistry, University of New South Wales Sydney, NSW 2052, Australia
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O'Connor GD, Chan B, Sanelli JA, Cergol KM, Dryza V, Payne RJ, Bieske EJ, Radom L, Schmidt TW. Hydrogen-adduction to open-shell graphene fragments: spectroscopy, thermochemistry and astrochemistry. Chem Sci 2017; 8:1186-1194. [PMID: 28451259 PMCID: PMC5369534 DOI: 10.1039/c6sc03787a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 09/24/2016] [Indexed: 11/25/2022] Open
Abstract
We apply a combination of state-of-the-art experimental and quantum-chemical methods to elucidate the electronic and chemical energetics of hydrogen adduction to a model open-shell graphene fragment. The lowest-energy adduct, 1H-phenalene, is determined to have a bond dissociation energy of 258.1 kJ mol-1, while other isomers exhibit reduced or in some cases negative bond dissociation energies, the metastable species being bound by the emergence of a conical intersection along the high-symmetry dissociation coordinate. The gas-phase excitation spectrum of 1H-phenalene and its radical cation are recorded using laser spectroscopy coupled to mass-spectrometry. Several electronically excited states of both species are observed, allowing the determination of the excited-state bond dissociation energy. The ionization energy of 1H-phenalene is determined to be 7.449(17) eV, consistent with high-level W1X-2 calculations.
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Affiliation(s)
- Gerard D O'Connor
- School of Chemistry , UNSW Sydney , NSW 2052 , Australia . ; Tel: +61 439 386 109
| | - Bun Chan
- School of Chemistry , The University of Sydney , Sydney , New South Wales 2006 , Australia
- Graduate School of Engineering , Nagasaki University , Bunkyo 1-14 , Nagasaki 852-8521 , Japan
| | - Julian A Sanelli
- School of Chemistry , The University of Melbourne , Victoria 3010 , Australia
| | - Katie M Cergol
- School of Chemistry , The University of Sydney , Sydney , New South Wales 2006 , Australia
| | - Viktoras Dryza
- School of Chemistry , The University of Melbourne , Victoria 3010 , Australia
| | - Richard J Payne
- School of Chemistry , The University of Sydney , Sydney , New South Wales 2006 , Australia
| | - Evan J Bieske
- School of Chemistry , The University of Melbourne , Victoria 3010 , Australia
| | - Leo Radom
- School of Chemistry , The University of Sydney , Sydney , New South Wales 2006 , Australia
| | - Timothy W Schmidt
- School of Chemistry , UNSW Sydney , NSW 2052 , Australia . ; Tel: +61 439 386 109
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O’Connor GD, Woodhouse GV, Troy TP, Schmidt TW. Double-resonance spectroscopy of radicals: higher electronic excited states of 1- and 2-naphthylmethyl, 1-phenylpropargyl and 9-anthracenylmethyl. Mol Phys 2015. [DOI: 10.1080/00268976.2015.1012127] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Krechkivska O, Wilcox CM, Chan B, Jacob R, Liu Y, Nauta K, Kable SH, Radom L, Schmidt TW. H and D Attachment to Naphthalene: Spectra and Thermochemistry of Cold Gas-Phase 1-C10H9 and 1-C10H8D Radicals and Cations. J Phys Chem A 2015; 119:3225-32. [DOI: 10.1021/acs.jpca.5b01652] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Olha Krechkivska
- School
of Chemistry, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Callan M. Wilcox
- School
of Chemistry, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Bun Chan
- School
of Chemistry and Centre of Excellence for Free Radical Chemistry and
Biotechnology, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Rebecca Jacob
- School
of Chemistry and Centre of Excellence for Free Radical Chemistry and
Biotechnology, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Yu Liu
- School
of Chemistry, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Klaas Nauta
- School
of Chemistry, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Scott H. Kable
- School
of Chemistry, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Leo Radom
- School
of Chemistry and Centre of Excellence for Free Radical Chemistry and
Biotechnology, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Timothy W. Schmidt
- School
of Chemistry, The University of New South Wales, Sydney, New South Wales 2052, Australia
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Troy TP, Tayebjee MJ, Nauta K, Kable SH, Schmidt TW. Atmospheric oxidation intermediates: Laser spectroscopy of resonance-stabilized radicals from p-cymene. Chem Phys Lett 2015. [DOI: 10.1016/j.cplett.2014.12.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Krechkivska O, Wilcox C, O’Connor GD, Nauta K, Kable SH, Schmidt TW. Ionization Energies of Three Resonance-Stabilized Radicals: Cyclohexadienyl (dn, n = 0, 1, 6, 7), 1-Phenylpropargyl, and Methylcyclohexadienyl. J Phys Chem A 2014; 118:10252-8. [DOI: 10.1021/jp508985s] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Olha Krechkivska
- School
of Chemistry, UNSW Sydney, Sydney, New South Wales 2052, Australia
| | - Callan Wilcox
- School
of Chemistry, UNSW Sydney, Sydney, New South Wales 2052, Australia
| | - Gerard D. O’Connor
- School
of Chemistry, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Klaas Nauta
- School
of Chemistry, UNSW Sydney, Sydney, New South Wales 2052, Australia
| | - Scott H. Kable
- School
of Chemistry, UNSW Sydney, Sydney, New South Wales 2052, Australia
| | - Timothy W. Schmidt
- School
of Chemistry, UNSW Sydney, Sydney, New South Wales 2052, Australia
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