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Photochemistry of copper(II) chlorocomplexes in acetonitrile: Trapping the ligand-to-metal charge transfer excited state relaxations pathways.

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Title: Photochemistry of copper(II) chlorocomplexes in acetonitrile: Trapping the ligand-to-metal charge transfer excited state relaxations pathways.
Authors: Mereshchenko, Andrey S.1,2 andreym@chem.spbu.ru, Olshin, Pavel K.1, Karimov, Artur M.1, Skripkin, Mikhail Yu.1, Burkov, Kim A.1, Tveryanovich, Yury S.1, Tarnovsky, Alexander N.2,3
Source: Chemical Physics Letters. Nov2014, Vol. 615, p105-110. 6p.
Subjects: Photochemistry, Copper ions, Metal complexes, Photoreduction, Dissociation (Chemistry)
Abstract: Photochemistry of [Cu(MeCN) 3 Cl] + , [Cu(MeCN)Cl 3 ] − , and [CuCl 4 ] 2− copper(II) chlorocomplexes in acetonitrile solution is studied by means of the combination of the steady-state photolysis and ultrafast transient absorption methods. The main relaxation pathways of the initially excited ligand-to-metal charge transfer states are internal conversion to the ground state, ionic dissociation without (photo)reduction of copper(II), and radical dissociation with (photo)reduction of copper(II). The copper(II)-to-copper(I) photoreduction quantum yields obtained from steady-state photolysis correlate with ultrafast spectroscopy data. The presence of oxygen does not affect the photoreduction quantum yields, which do not exceed 7% for the complexes studied and decrease in the series: [Cu(MeCN) 3 Cl] + > [Cu(MeCN)Cl 3 ] − > [CuCl 4 ] 2− . [ABSTRACT FROM AUTHOR]
Copyright of Chemical Physics Letters is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 99209664
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  Data: Photochemistry of copper(II) chlorocomplexes in acetonitrile: Trapping the ligand-to-metal charge transfer excited state relaxations pathways.
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  Data: <searchLink fieldCode="JN" term="%22Chemical+Physics+Letters%22">Chemical Physics Letters</searchLink>. Nov2014, Vol. 615, p105-110. 6p.
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  Data: <searchLink fieldCode="DE" term="%22Photochemistry%22">Photochemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Copper+ions%22">Copper ions</searchLink><br /><searchLink fieldCode="DE" term="%22Metal+complexes%22">Metal complexes</searchLink><br /><searchLink fieldCode="DE" term="%22Photoreduction%22">Photoreduction</searchLink><br /><searchLink fieldCode="DE" term="%22Dissociation+%28Chemistry%29%22">Dissociation (Chemistry)</searchLink>
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  Data: Photochemistry of [Cu(MeCN) 3 Cl] + , [Cu(MeCN)Cl 3 ] − , and [CuCl 4 ] 2− copper(II) chlorocomplexes in acetonitrile solution is studied by means of the combination of the steady-state photolysis and ultrafast transient absorption methods. The main relaxation pathways of the initially excited ligand-to-metal charge transfer states are internal conversion to the ground state, ionic dissociation without (photo)reduction of copper(II), and radical dissociation with (photo)reduction of copper(II). The copper(II)-to-copper(I) photoreduction quantum yields obtained from steady-state photolysis correlate with ultrafast spectroscopy data. The presence of oxygen does not affect the photoreduction quantum yields, which do not exceed 7% for the complexes studied and decrease in the series: [Cu(MeCN) 3 Cl] + > [Cu(MeCN)Cl 3 ] − > [CuCl 4 ] 2− . [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Chemical Physics Letters is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.cplett.2014.10.016
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              Text: Nov2014
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