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Synthesis, Electrochemistry, and Excited-State Properties of Three Ru(II) Quaterpyridine Complexes

Jennifer Rudd Orcid Logo, M. Kyle Brennaman, Katherine E. Michaux, Dennis L. Ashford, Royce W. Murray, Thomas. J. Meyer

The Journal of Physical Chemistry A, Volume: 120, Issue: 11, Pages: 1845 - 1852

Swansea University Author: Jennifer Rudd Orcid Logo

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DOI (Published version): 10.1021/acs.jpca.6b00317

Abstract

The complexes [Ru(qpy)LL′]2+ (qpy = 2,2′:6′,2″:6″,2‴-quaterpyridine), with 1: L = acetonitrile, L′= chloride; 2: L = L′= acetonitrile; and 3: L = L′= vinylpyridine, have been prepared from [Ru(qpy) (Cl)2]. Their absorption spectra in CH3CN exhibit broad metal-to-ligand charge transfer (MLCT) absorpt...

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Published in: The Journal of Physical Chemistry A
ISSN: 1089-5639 1520-5215
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa38733
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spelling 2018-03-02T11:03:24.9170270 v2 38733 2018-02-15 Synthesis, Electrochemistry, and Excited-State Properties of Three Ru(II) Quaterpyridine Complexes c2e4cf0f048a86b5ca2f331e6c566aff 0000-0002-5209-477X Jennifer Rudd Jennifer Rudd true false 2018-02-15 BBU The complexes [Ru(qpy)LL′]2+ (qpy = 2,2′:6′,2″:6″,2‴-quaterpyridine), with 1: L = acetonitrile, L′= chloride; 2: L = L′= acetonitrile; and 3: L = L′= vinylpyridine, have been prepared from [Ru(qpy) (Cl)2]. Their absorption spectra in CH3CN exhibit broad metal-to-ligand charge transfer (MLCT) absorptions arising from overlapping 1A1 → 1MLCT transitions. Photoluminescence is not observed at room temperature, but all three are weakly emissive in 4:1 ethanol/methanol glasses at 77 K with broad, featureless emissions observed between 600 and 1000 nm consistent with MLCT phosphorescence. Cyclic voltammograms in CH3CN reveal the expected RuIII/II redox couples. In 0.1 M trifluoroacetic acid (TFA), 1 and 2 undergo aquation to give [RuII(qpy)(OH2)2]2+, as evidenced by the appearance of waves for the couples [RuIII(qpy)(OH2)2]3+/[RuII(qpy)(OH2)2]2+, [RuIV(qpy)(O)(OH2)]2+/[RuIII(qpy)(OH2)2]3+, and [RuVI(qpy)(O)2]2+/[RuIV(qpy)(O)(OH2)]2+ in cyclic voltammograms. Journal Article The Journal of Physical Chemistry A 120 11 1845 1852 1089-5639 1520-5215 24 3 2016 2016-03-24 10.1021/acs.jpca.6b00317 http://www.scopus.com/inward/record.url?eid=2-s2.0-84962184461&amp;partnerID=MN8TOARS COLLEGE NANME Business COLLEGE CODE BBU Swansea University 2018-03-02T11:03:24.9170270 2018-02-15T13:34:58.2735857 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Jennifer Rudd 0000-0002-5209-477X 1 M. Kyle Brennaman 2 Katherine E. Michaux 3 Dennis L. Ashford 4 Royce W. Murray 5 Thomas. J. Meyer 6 0038733-02032018110300.pdf rudd2016.pdf 2018-03-02T11:03:00.7070000 Output 762428 application/pdf Version of Record true 2018-03-02T00:00:00.0000000 false eng
title Synthesis, Electrochemistry, and Excited-State Properties of Three Ru(II) Quaterpyridine Complexes
spellingShingle Synthesis, Electrochemistry, and Excited-State Properties of Three Ru(II) Quaterpyridine Complexes
Jennifer Rudd
title_short Synthesis, Electrochemistry, and Excited-State Properties of Three Ru(II) Quaterpyridine Complexes
title_full Synthesis, Electrochemistry, and Excited-State Properties of Three Ru(II) Quaterpyridine Complexes
title_fullStr Synthesis, Electrochemistry, and Excited-State Properties of Three Ru(II) Quaterpyridine Complexes
title_full_unstemmed Synthesis, Electrochemistry, and Excited-State Properties of Three Ru(II) Quaterpyridine Complexes
title_sort Synthesis, Electrochemistry, and Excited-State Properties of Three Ru(II) Quaterpyridine Complexes
author_id_str_mv c2e4cf0f048a86b5ca2f331e6c566aff
author_id_fullname_str_mv c2e4cf0f048a86b5ca2f331e6c566aff_***_Jennifer Rudd
author Jennifer Rudd
author2 Jennifer Rudd
M. Kyle Brennaman
Katherine E. Michaux
Dennis L. Ashford
Royce W. Murray
Thomas. J. Meyer
format Journal article
container_title The Journal of Physical Chemistry A
container_volume 120
container_issue 11
container_start_page 1845
publishDate 2016
institution Swansea University
issn 1089-5639
1520-5215
doi_str_mv 10.1021/acs.jpca.6b00317
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
url http://www.scopus.com/inward/record.url?eid=2-s2.0-84962184461&amp;partnerID=MN8TOARS
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description The complexes [Ru(qpy)LL′]2+ (qpy = 2,2′:6′,2″:6″,2‴-quaterpyridine), with 1: L = acetonitrile, L′= chloride; 2: L = L′= acetonitrile; and 3: L = L′= vinylpyridine, have been prepared from [Ru(qpy) (Cl)2]. Their absorption spectra in CH3CN exhibit broad metal-to-ligand charge transfer (MLCT) absorptions arising from overlapping 1A1 → 1MLCT transitions. Photoluminescence is not observed at room temperature, but all three are weakly emissive in 4:1 ethanol/methanol glasses at 77 K with broad, featureless emissions observed between 600 and 1000 nm consistent with MLCT phosphorescence. Cyclic voltammograms in CH3CN reveal the expected RuIII/II redox couples. In 0.1 M trifluoroacetic acid (TFA), 1 and 2 undergo aquation to give [RuII(qpy)(OH2)2]2+, as evidenced by the appearance of waves for the couples [RuIII(qpy)(OH2)2]3+/[RuII(qpy)(OH2)2]2+, [RuIV(qpy)(O)(OH2)]2+/[RuIII(qpy)(OH2)2]3+, and [RuVI(qpy)(O)2]2+/[RuIV(qpy)(O)(OH2)]2+ in cyclic voltammograms.
published_date 2016-03-24T03:49:06Z
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