Novel planar and sandwich-type complexes of substituted tetrathieno[2,3-b] porphyrazine: Synthesis and investigation of properties

An efficient synthetic approach to a novel substituted tetrathieno[2,3-b]porphyrazine, its Mg, Zn, Lu complexes and a Lu triple-decker complex was developed. Spectral properties and aggregation phenomena of the target compounds were investigated by UV/Vis spectroscopy and atomic force microscopy (AFM). Electrochromic behaviour of the Zn complex was studied by electrochemistry and spectroelectrochemistry.

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► Novel highly soluble substituted porphyrazines were synthesised in high yields (45–80%).
► Heterocyclic ring annelated sandwich-type porphyrazine complex was synthesised for the first time.
► Spectral properties and aggregation phenomena of the target compounds were investigated by UV/Vis spectroscopy and AFM.
► Electrochromic behaviour of the Zn complex was studied by electrochemistry and spectroelectrochemistry.