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Intra‐Molecular Energy Transfer Characteristics of Novel Oligo(thienylphenyl)amine Derivatives Having a Gradient Structure
Author(s) -
Cho JunSang,
Kojima Yojiro,
Norifusa Sato,
Higuchi Masayoshi,
Yamamoto Kimihisa
Publication year - 2003
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200350078
Subject(s) - thiophene , amine gas treating , chemistry , oligomer , absorption (acoustics) , polymer chemistry , molecule , polymer , absorption spectroscopy , energy transfer , photochemistry , materials science , chemical physics , organic chemistry , optics , physics , composite material
Oligo(thienylphenyl)amine (TTPA) derivatives which have different thiophene units and potential gradient molecules were synthesized. From the investigation of steady‐state absorption and emission properties and the estimation of the free energy and the energy level of the oligomers, the energy transfer efficiency of the oligomers increased with increasing thiophene units, implying that the energy transfer mainly occurs through space due to a large area overlap existing between the absorption and the emission spectra of the oligomers. Furthermore, based on the calculated Rehm‐Weller equation (ΔGen and ΔGel) and energy diagrams of the oligomers, we found that 4TTPA ( 4 ), having a 4‐unit thiophene in the backbone, showed higher energy transfer efficiency compared to that of the others.Molecular structures of TTPA oligomers.