Photophysical and Photochemical Studies of Tricarbonyl Rhenium(I) N-Heterocyclic Carbene Complexes Containing Azide and Triazolate Ligands
Rhenium(I) N-heterocyclic carbene (NHC) complexes of the type fac-[Re(CO)3(NHC)L] with either azide or triazolate ancillary ligands L and pyridyl or pyrimidyl substituted imidazolyl units have been prepared and structurally characterised, and their photophysical and photochemical properties studied....
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| Format: | Journal Article |
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Royal Society of Chemistry
2016
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| Online Access: | http://purl.org/au-research/grants/arc/FT130100033 http://hdl.handle.net/20.500.11937/17784 |
| _version_ | 1848749557198880768 |
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| author | Simpson, Peter V. Skelton, B. Raiteri, Paolo Massi, Massimiliano |
| author_facet | Simpson, Peter V. Skelton, B. Raiteri, Paolo Massi, Massimiliano |
| author_sort | Simpson, Peter V. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Rhenium(I) N-heterocyclic carbene (NHC) complexes of the type fac-[Re(CO)3(NHC)L] with either azide or triazolate ancillary ligands L and pyridyl or pyrimidyl substituted imidazolyl units have been prepared and structurally characterised, and their photophysical and photochemical properties studied. All of the complexes exhibit phosphorescent emission from triplet metal-to-ligand (3MCLT) excited states, typical of tricarbonyl Re(I) complexes, with the triazolate bound complexes having higher quantum yields and longer decay lifetimes compared to the azide bound complexes. The complexes containing pyridyl substituted imidazolyl units are photoreactive when dissolved in acetonitrile and undergo photochemical CO dissociation, the rate of which is significantly greater in the azide cf. triazolate complex. The photochemical mechanism of the azide/pyridyl complex was analysed and appears to give the same products, albeit with different ratios, to previously reported complexes where L is a halide. A reaction mechanism is proposed. |
| first_indexed | 2025-11-14T07:22:50Z |
| format | Journal Article |
| id | curtin-20.500.11937-17784 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:22:50Z |
| publishDate | 2016 |
| publisher | Royal Society of Chemistry |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-177842024-04-11T03:19:36Z Photophysical and Photochemical Studies of Tricarbonyl Rhenium(I) N-Heterocyclic Carbene Complexes Containing Azide and Triazolate Ligands Simpson, Peter V. Skelton, B. Raiteri, Paolo Massi, Massimiliano Rhenium(I) N-heterocyclic carbene (NHC) complexes of the type fac-[Re(CO)3(NHC)L] with either azide or triazolate ancillary ligands L and pyridyl or pyrimidyl substituted imidazolyl units have been prepared and structurally characterised, and their photophysical and photochemical properties studied. All of the complexes exhibit phosphorescent emission from triplet metal-to-ligand (3MCLT) excited states, typical of tricarbonyl Re(I) complexes, with the triazolate bound complexes having higher quantum yields and longer decay lifetimes compared to the azide bound complexes. The complexes containing pyridyl substituted imidazolyl units are photoreactive when dissolved in acetonitrile and undergo photochemical CO dissociation, the rate of which is significantly greater in the azide cf. triazolate complex. The photochemical mechanism of the azide/pyridyl complex was analysed and appears to give the same products, albeit with different ratios, to previously reported complexes where L is a halide. A reaction mechanism is proposed. 2016 Journal Article http://hdl.handle.net/20.500.11937/17784 10.1039/C5NJ03301B http://purl.org/au-research/grants/arc/FT130100033 http://purl.org/au-research/grants/arc/FT130100463 http://creativecommons.org/licenses/by-nc/3.0/ Royal Society of Chemistry fulltext |
| spellingShingle | Simpson, Peter V. Skelton, B. Raiteri, Paolo Massi, Massimiliano Photophysical and Photochemical Studies of Tricarbonyl Rhenium(I) N-Heterocyclic Carbene Complexes Containing Azide and Triazolate Ligands |
| title | Photophysical and Photochemical Studies of Tricarbonyl Rhenium(I) N-Heterocyclic Carbene Complexes Containing Azide and Triazolate Ligands |
| title_full | Photophysical and Photochemical Studies of Tricarbonyl Rhenium(I) N-Heterocyclic Carbene Complexes Containing Azide and Triazolate Ligands |
| title_fullStr | Photophysical and Photochemical Studies of Tricarbonyl Rhenium(I) N-Heterocyclic Carbene Complexes Containing Azide and Triazolate Ligands |
| title_full_unstemmed | Photophysical and Photochemical Studies of Tricarbonyl Rhenium(I) N-Heterocyclic Carbene Complexes Containing Azide and Triazolate Ligands |
| title_short | Photophysical and Photochemical Studies of Tricarbonyl Rhenium(I) N-Heterocyclic Carbene Complexes Containing Azide and Triazolate Ligands |
| title_sort | photophysical and photochemical studies of tricarbonyl rhenium(i) n-heterocyclic carbene complexes containing azide and triazolate ligands |
| url | http://purl.org/au-research/grants/arc/FT130100033 http://purl.org/au-research/grants/arc/FT130100033 http://hdl.handle.net/20.500.11937/17784 |