From spontaneously formed aggregates to J-aggregates of photochromic spiropyran

@inproceedings{Uznanski2000FromSF,
  title={From spontaneously formed aggregates to J-aggregates of photochromic spiropyran},
  author={Pawel Uznanski},
  year={2000}
}
Abstract Nitrospiropyrans form spontaneously aggregates in aliphatic solvents at room temperature. During solvent evaporation and simultaneous exposition of photochromic solution to UV irradiation, blue crystalline “particles” are abundantly formed within several seconds without any decomposition side effect. Their size can reach dimensions equal to tens of microns depending on the concentration or may form continuous film depending on the substrate surface pre-treatment. Pure solid samples of… CONTINUE READING