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- W1987861931 abstract "Emission from charge recombination between radical cations and anions of a series of regioisomeric 1,4-, 1,3-, and 1,2-bis(phenylethynyl)benzenes (bPEBs) substituted by various electron donor and/or acceptor groups was measured during pulse radiolysis in benzene (Bz). The formation of bPEB in the excited singlet state (1bPEB*) can be attributed to the charge recombination between bPEB• + and bPEB• −, which are initially generated from the radiolytic reaction. This mechanism is reasonably explained by the relationship between the annihilation enthalpy change (−ΔH°) for the charge recombination of bPEB• + and bPEB• − and excitation energy of 1bPEB*. Since the degree of the π-conjugation in the S1 state and HOMO−LUMO levels of bPEB change with the substitution pattern of phenylacetylene groups on the central benzene ring and the various kinds of donor and/or acceptor group, the fine-tuning of the emission color and intensity of bPEB can be easily carried out during pulse radiolysis in Bz. For donor-acceptor-substituted bPEB, it was found that the difference in the charge transfer conjugated pathways between donor and acceptor substituents (linear-, cross-, and “bent”-conjugated pathways) strongly influenced the HOMO−LUMO energy gap." @default.
- W1987861931 created "2016-06-24" @default.
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- W1987861931 date "2009-04-14" @default.
- W1987861931 modified "2023-10-16" @default.
- W1987861931 title "Emission from Regioisomeric Bis(phenylethynyl)benzenes during Pulse Radiolysis" @default.
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- W1987861931 doi "https://doi.org/10.1021/jo900494j" @default.
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