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- W2122256936 abstract "The Raman spectrum of a quaterthiophene oligomer incorporating a central vinylene spacer has been investigated using density functional theory B3LYP/6-31G** calculations. The spectrum has been fully assigned with the aid of the calculations and in comparison with unsubstituted quaterthiophene. The spectrum preserves most of the vibrational features of linear oligothiophenes. The vibrations of the vinylene spacer are clearly differentiated from those of the rest of the chain. The vinylene spacer increases the conjugation length of the molecule and induces a frequency downshift of ≈20 cm−1 for the normal modes associated with the νas(CC) and νs(CC) vibrations of the thiophene rings. The molecule is predicted to have a structure in which both the thiophene rings and the vinylene spacer are in an all-anti conformation." @default.
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- W2122256936 date "2003-06-01" @default.
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- W2122256936 title "Theoretical description of the Raman spectrum of a vinylene-bridged quaterthiophene oligomer" @default.
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- W2122256936 doi "https://doi.org/10.1016/s0022-2860(02)00690-7" @default.
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