The nanoparticles of a spirooxazine （SPO） and its photomerocyanine （PMC） were prepared through the reprecipitation method. Two distinct features were observed. One is that the decaying lifetime for PMC nanoparticles was 600 times of that for the dispersed molecules, and the other is that the fluorescence intensity of SPO nanoparticles was enhanced by 240 times of that of the dispersed monomer.
Novel diarylethene derivatives: N-substituted-3,4-bisheteroaryl-2,5-dihydropyrroleswere synthesized through Mcmurry couple reaction with high yields. The photochromic propertiesand UV-Vis absorption spectra were studied. The maximal absorptions of their close forms werearound at 406 nm or 446 nm, which related mainly with heteroaryl groups but not with substitutedgroups at nitrogen atom of dihydropyrrole. The absorption of their colored form could be matchedwith blue light laser.
