Model of the structure of amphi-PIC J-aggregates: structural formula for the dye (a), a ring of amphi-PIC molecules (b), and cylindrical packing of rings (c).
Absorption bands of amphi-PIC J-aggregates (J-bands) for different amounts of water in the binary DMFA/water solution at : (1) 50%, (2) 75% (a); comparison of the J-band (curve 1) with a band in the trap luminescence excitation spectrum (curve 2, ) for J-aggregates in solution with 59% water at (b); and, the localized exciton absorption band (c).
Temperature dependence of the exciton trap luminescence intensity (, trap/amphi-) for excitation in different regions of the J-band: (1) excitation at the maximum ; (2) excitation in the localized exciton band in the long-wavelength edge . The dashed curves are approximations corresponding to (1) and exponential (2) dependences.
Luminescence excitation spectra for isolated amphi-PIC J-aggregates at , . Curves 1–5 are spectra for different J-aggregates.
Luminescence spectra of amphi-PIC J-aggregates under different experimental conditions: (a) , (1); , (2); (b) , . The dashed curve is for a J-band at . The amount of water in the binary DMFA/water solution is 50%.
Luminescence spectra of amphi-PIC J-aggregates at : (1) without a surface active substance, (2) with a surface active substance. The content of the binary DMFA/water solution is 50%.
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