Molecular Photochromic Sys tem: Experimental Investigation of Nickel(ll)Dithizonate in D ifferent S olvent by Diode Laser

Photochromism is a reversible transform ation of a chemical species induce d in one or both directions by absorp tion of electromagnetic radiation between tw o forms, A and B, having different a absorption spectra. The thermody namically st able form A is transform ed by irradiation into form B[۱].The ph otochemistr y of differe nt metal dith izonates ha s been studi ed extensively by Meriw ether et al [۲]. The photo- and thermo-chromisms of organometallic com pounds have been inten sively studied d uring the l ast ۲۰ years . Different coordination compoun ds of the monoanionic HDz-species i n tetrahedral or square-planar geom etries [M(H Dz)۲, M = Zn, Cd, Hg, P t, etc.] have been previously synthesized and ch aracterized and it has been sugge sted that the photoch romic reaction involves a trans–cis iso merization about the C=N bond and an N to N h ydrogen transfer, as shown in Scheme ۱.

کلیدواژه ها:

Photochromism ، Ni ckel(ll)dithi zonate ، Diod e laser.