H. Kamatani et al., PREPARATION OF J-AGGREGATED MICROCRYSTALS OF PSEUDOISOCYANINE, Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 252, 1994, pp. 233-241
J-aggregated microcrystals of 1,1'-diethyl-2,2'-cyanine bromide [pseud
oisocyanine bromide (PIC)] was prepared by salting-out in saturated po
tasium bromide aqueous solution, reprecipitation in hexane and recryst
allization in polymers at room temperature. J-band of microcrystals fr
om aqueous conditions was sharp and blue-shifted compared with those f
rom hydrophobic conditions. The size of the former microcrystals was s
maller than that of the latter ones.