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Absorption spectra and photochemical rearrangement of octatetraene and decapentaene radical cations in solid argon
Affiliation:1. Department of Physiology, Medical College, Jianghan University, Wuhan 430056, China;2. Department of Pain Management, Wuhan Pu-Ai Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430033, China;3. Experimental Centre, Medical College, Jianghan University, Wuhan 430056, China;4. Department of Immunology, Medical College, Jianghan University, Wuhan 430056, China;1. Departamento de Física, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, 36036-900, Brazil;2. Wolverhampton School of Sciences, University of Wolverhampton, Wolverhampton, WV1 1LY, UK;3. Instituto Federal do Sul de Minas Gerais, Campus Poços de Caldas, Minas Gerais, Brazil;4. School of Chemical and Physical Sciences, Flinders University, GPO Box 2100, Adelaide, SA 5001, Australia;5. Departamento de Fisica Atomica, Molecular y Nuclear, Universidad Complutense de Madrid, 28040 Madrid, Spain;6. Instituto de Física Fundamental, Consejo Superior de Investigaciones Científicas (CSIC), Serrano 113-bis, 28006 Madrid, Spain;1. Department of Orthopaedic Surgery, The Perelman School of Medicine at The University of Pennsylvania, Philadelphia, PA 19104, USA;2. Department of Genetics, The Perelman School of Medicine at The University of Pennsylvania, Philadelphia, PA 19104, USA;3. Department of Medicine, The Perelman School of Medicine at The University of Pennsylvania, Philadelphia, PA 19104, USA;4. The Center for Research in FOP & Related Disorders, The Perelman School of Medicine at The University of Pennsylvania, Philadelphia, PA 19104, USA;5. The University of Tennessee Genetics Center, Knoxville, TN 37920, USA;1. Department of Plant Pathology, Kansas State University, Manhattan, KS 66506, USA;2. Department of Geography and the Environment, University of Texas at Austin, Austin, TX 78712, USA
Abstract:
Parent radical cations of octatetraene and decapentaene have been prepared and trapped in solid argon using matrix photoionization methods with both cyclic and acyclic precursors. Visible absorption spectra are assigned to the all-trans cation isomer and several structures with increasing numbers of cis configurations. Irradiation into these bands with argon and krypton ion laser lines caused reversible rearrangements among several of the configurations for octatetraene and decapentaene cations. The cold matrix provides an excellent medium for studying molecular cation rearrangements where one structure can absorb light and other structures formed can be relaxed by the matrix before dissociation
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