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Femtosecond photolysis of CH2Br2 in acetonitrile: Capturing the bromomethyl radical and bromine-atom charge transfer complex through deep-to-near UV probing

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Title: Femtosecond photolysis of CH2Br2 in acetonitrile: Capturing the bromomethyl radical and bromine-atom charge transfer complex through deep-to-near UV probing
Authors: Pal, Suman K., Mereshchenko, Andrey S.1, El-Khoury, Patrick Z., Tarnovsky, Alexander N. atarnov@bgsu.edu
Source: Chemical Physics Letters. Apr2011, Vol. 507 Issue 1-3, p69-73. 5p.
Subjects: Femtochemistry, Acetonitrile, Ethylene dibromide, Radicals (Chemistry), Electron donor-acceptor complexes, Ultraviolet spectroscopy, Absorption spectra, Cyclohexane
Abstract: Abstract: Dibromomethane (CH2Br2) in acetonitrile is a suitable precursor to characterize the absorption signatures of the CH2Br radical and solvent Br charge-transfer complexes. Following irradiation of CH2Br2 at 255nm, the iso-H2Cph name="sbnd" />Br isomer product rapidly converts back to the parent species, and transient absorption spectra reveal the bands of solvent-separated radical species, the CH2Br radical peaking at 235nm, as well as the CH3CN·Br complex at 272nm. The absorption of CH2Br exhibits minor solvatochromic shifts upon going from acetonitrile to cyclohexane, and the molecular decadic extinction coefficient of CH3CN·Br is estimated to be 1470M−1 cm−1. [Copyright &y& Elsevier]
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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  Data: Femtosecond photolysis of CH<subscript>2</subscript>Br<subscript>2</subscript> in acetonitrile: Capturing the bromomethyl radical and bromine-atom charge transfer complex through deep-to-near UV probing
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  Data: <searchLink fieldCode="AR" term="%22Pal%2C+Suman+K%2E%22">Pal, Suman K.</searchLink><br /><searchLink fieldCode="AR" term="%22Mereshchenko%2C+Andrey+S%2E%22">Mereshchenko, Andrey S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22El-Khoury%2C+Patrick+Z%2E%22">El-Khoury, Patrick Z.</searchLink><br /><searchLink fieldCode="AR" term="%22Tarnovsky%2C+Alexander+N%2E%22">Tarnovsky, Alexander N.</searchLink><i> atarnov@bgsu.edu</i>
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  Data: <searchLink fieldCode="JN" term="%22Chemical+Physics+Letters%22">Chemical Physics Letters</searchLink>. Apr2011, Vol. 507 Issue 1-3, p69-73. 5p.
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  Data: <searchLink fieldCode="DE" term="%22Femtochemistry%22">Femtochemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Acetonitrile%22">Acetonitrile</searchLink><br /><searchLink fieldCode="DE" term="%22Ethylene+dibromide%22">Ethylene dibromide</searchLink><br /><searchLink fieldCode="DE" term="%22Radicals+%28Chemistry%29%22">Radicals (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Electron+donor-acceptor+complexes%22">Electron donor-acceptor complexes</searchLink><br /><searchLink fieldCode="DE" term="%22Ultraviolet+spectroscopy%22">Ultraviolet spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Absorption+spectra%22">Absorption spectra</searchLink><br /><searchLink fieldCode="DE" term="%22Cyclohexane%22">Cyclohexane</searchLink>
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  Data: Abstract: Dibromomethane (CH2Br2) in acetonitrile is a suitable precursor to characterize the absorption signatures of the CH2Br radical and solvent Br charge-transfer complexes. Following irradiation of CH2Br2 at 255nm, the iso-H2Cph name="sbnd" />Br isomer product rapidly converts back to the parent species, and transient absorption spectra reveal the bands of solvent-separated radical species, the CH2Br radical peaking at 235nm, as well as the CH3CN·Br complex at 272nm. The absorption of CH2Br exhibits minor solvatochromic shifts upon going from acetonitrile to cyclohexane, and the molecular decadic extinction coefficient of CH3CN·Br is estimated to be 1470M−1 cm−1. [Copyright &y& Elsevier]
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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.2011.02.046
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      – Code: eng
        Text: English
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        PageCount: 5
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      – SubjectFull: Femtochemistry
        Type: general
      – SubjectFull: Acetonitrile
        Type: general
      – SubjectFull: Ethylene dibromide
        Type: general
      – SubjectFull: Radicals (Chemistry)
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      – SubjectFull: Electron donor-acceptor complexes
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      – SubjectFull: Ultraviolet spectroscopy
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      – SubjectFull: Absorption spectra
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      – SubjectFull: Cyclohexane
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      – TitleFull: Femtosecond photolysis of CH2Br2 in acetonitrile: Capturing the bromomethyl radical and bromine-atom charge transfer complex through deep-to-near UV probing
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              Text: Apr2011
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