The discrimination between triplet state and radical cation in the pulse radiolysis of bithiophene in CCl4 |
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Authors: | Salvatore S Emmi Mila DAngelantonio Giancarlo Beggiato Nadia Camaioni |
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Institution: | Istituto FRAE of CNR, Area della Ricerca, Via P. Gobetti 101, 40129 Bologna, Italy |
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Abstract: | The triplet state (32T) and the radical cation (2T+√) of 2,2′-bithiophene (2T) are characterized by pulse radiolysis in CCl4. Two main absorption bands at 360 and 420 nm are respectively attributed to 32T* and to 2T+√. The triplet, induced in an excited state through a Förster mechanism, undergoes a conformational rearrangement (k6=(6.8±0.9)×106 s−1). The radical cation is produced both through a resonance charge transfer and a second diffusional process; the two oxidizing species are respectively CCl4+√ and (CCl+3Cl−)solv through the mediation of a singlet excited state, 12T*. |
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Keywords: | 2 2′-Bithiophene Radical cations Triplets Pulse radiolysis CCl4+√ CCl+3 |
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