ИСТИНА

Porphyrazine fused to a heterocyclic ring possesses enhanced conductivity and nonlinear optical properties. Present investigation focuses on porphyrazines, which contain electron rich (thiophene) and electron poor (pyrazine) periphery. The synthetic route to the thieno[2,3-b]porphyrazine complexes 1 as a prospective building-blocks for sandwich-type porphyrazines was developed. A heterocyclic ring annelated sandwich-type porphyrazine complex 2 was synthesised for the first time. Spectral properties and aggregation phenomena of target compounds were investigated by UV/Vis and AFM techniques. Electrochromic behaviour of the Zn complex was studied by electrochemistry and spectroelectrochemistry. 3,4-Dicyanothiophene was chosen as initial compound for the synthesis of mono- (3) and binuclear (4) thienoporphyrazine complexes with a nonclassical thiophene moiety. All units of the porphyrazine periphery are equivalent, and corresponding protons were observed at 8.47 ppm as a doublet. The formation of nanoaggregates in a solid film was shown using AFM technique. On the basis of MCD data the absorption maxima in the Q band region were assigned.