ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
A new organic photochromic function material containing pyrazolone-ring,1-phenyl-3-methyl-4-(4-fluobenzal)-pyrazolone-5 thiosemicarbazone (PM4FBP-TSC) was synthesized and characterized by elemental analysis, IR spectrum and 1H NMR spectrum. The photochromic properties and photocolored kinetics of PM4FBP-TSC were studied by Time-dependent UV-vis reflective spectra and fluorescent spectra under irradiation of 365nm light. The structure of PM4FBP-TSC was determined by single crystal X-ray diffraction. Space group Pbca with celldimensions of a = 18.445(4) Å, b = 11.987(2) Å, c = 19.249(4) Å, V = 4256.1(18) Å3, Z = 8 and R = 0.0521. The crystal structure analysis of photocolored product of PM4FBP-TSC showed that the photochromic phenomenon was due to the photoisomerization from enol form to keto formı and the mechanism of intermolecular proton transfer was applied to interpret the photochromism. Thephotoisomerization belongs to the first-order reaction by computation, and kinetic reaction constant is k1 = 6.85 × 10-5 s-1
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/09/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.475-479.1821.pdf
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