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- W2020692080 abstract "The electronic states of benzene diazonium cation were calculated by a method similar to that of Pariser and Parr. On the basis of the calculations, the 259 mμ and 295 mμ absorption bands were attributed to 1A1–1A1 and 1A1-1B1 transitions respectively. When the sample was irradiated in an alcoholic solution by a 295 mμ light, no ESR signal was detected, but fluorescence and phosphorescence were observed; the fluorescence and the absorption spectrum of 1A1–1B1 transition have the correlation of a mirror image to each other. On the other hand, upon irradiation by a 259 mμ light, this sample showed an ESR spectrum which was attributed to the phenyl σ-radical, but no fluorescence or phosphorescence was observed. From the above experimental results and theoretical considerations, it was concluded that the electronically-excited benzenediazonium salt releases its excess energy by the following processes: (1) From the excited 1B1 state, there occur radiative transition to the ground state and intersystem crossing to the phosphorescent state, though it is as yet uncertain whether 3B1 or any other triplet states are involved. The photodecomposition does not proceed from the excited 1B1 state. (2) From the excited 1A1 state, neither the radiative transition to the ground state nor a nonradiative transition to any fluorescent or phosphorescent states occurs. The molecule decomposes rapidly to give phenyl σ-radical after excitation to this electronic state." @default.
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- W2020692080 title "Studies of the Photochemistry of Aromatic Diazo Compounds. I. Electronic Structure and Photodecomposition of Benzenediazonium Salt" @default.
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- W2020692080 doi "https://doi.org/10.1246/bcsj.40.461" @default.
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