Molecular dynamics of coil-rod-coil molecules depending on their concentrations in polar or non-polar solvent: Intra- and intermolecular interactions and charge transfer emissions

In Wook Hwang, Hyo Hwi Choi, Byoung Ki Cho, Myongsoo Lee, Yong Rok Kim

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Concentration-dependent molecular dynamics of long coil-rod-coil molecules at the concentrations of 1×10-6 M ~1×10-4 M in polar or non-polar solvent were investigated by steady-state excitation, fluorescence, and picosecond time-resolved fluorescence spectroscopies. The fluorescence spectra of the molecules reveal both characteristics of local excited-state emission and strong intramolecular charge-transfer (ICT) emission. The steady-state excitation spectra and the picosecond time-resolved fluorescence decay profiles in the concentrations of 5×10-5 M and 1×10-4 M ascertain hydrophobic rod-to-rod interaction (J-aggregation) in methanol solution. The hydrophilic intermolecular interactions (amorphous aggregation) in n-hexane are also discussed.

Original languageEnglish
Pages (from-to)219-224
Number of pages6
JournalChemical Physics Letters
Issue number1-3
Publication statusPublished - 2000 Jul 21


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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