Linear and nonlinear optical responses of a dye anchored to gold nanoparticles dispersed in liquid and polymeric matrixes

The compound [4-CH 3 C 6 H 4 -SS-CH 2 CH 2 -N(CH 3 )C 6 H 4 C(C 6 H 4 N(CH 3 ) 2 )-4) 2 ]Cl (1a) consists of the triarylmethyl chromophore of crystal violet appended to an organic disulfide, to entail direct attachment of this dye to gold surfaces. Addition of 1a to colloidal dispersions of the metal produced a stable dispersion in methanol–water mixtures. Transmission electron microscopy of Freeze-Fracture sections shadowed with carbon and …