A new organic photochromic compound, 1-phenyl-3-methyl-4-(4-fluoro)-benzal-5-pyrazolone ethanyl-thiosemicarbazone (PM4FBP-ETSC) was found to undergo photochromic reactions in the solid state. Upon irradiation with 365nm light the white powder sample turned light yellow. The photochromic properties were characterized by the time-dependent UV-vis reflective spectra. The structure of PM4FBP-ETSC was determined by single crystal X-ray diffraction.……
A novel compound PMPP-SAL (1-phenyl-3-methyl-4-(salicylidene hydrazide)- propenylidene-pyrazolone-5) has been synthesized and characterized by elemental analysis, IR, 1H NMR and single-crystal X-ray diffraction. The X-ray diffraction reveals that the compound is of orthorhombic, space group Pbca with a = 16.132(5), b = 10.113(3), c = 23.143(7) , V = 3776(2) 3, Z = 8, C20H20N4O3, Mr = 364.40, Dc = 1.282 g/cm3, F(000) = 1536, μ(MoK() = 0.089 mm-1, S = 0.992, R = 0.0578 and wR = 0.1362 for 1871 observed reflections with I > 2σ(I). In the crystal, the compound possesses two C=O bonds and exists in the NH-form’ other than NH-form.
