star-Porphyrazines: synthetic, structural, and spectral investigation of complexes of the polynucleating porphyrazineoctathiolato ligand

Tetrapyrazinoporphyrazines and their metal derivatives. Part I: Synthesis and basic structural information

“…Alternatively, the Mg II , Cu II and Zn II complexes could be obtained by template cyclotetramerization of the dinitrile precursor in the presence of the metal alkoxide (Mg II ), the acetate (Cu II , Zn II ) or powdered metal (Cu) [123,204]. The Mg II macrocycle appears always formulated with one water molecule axially ligated to the central metal, in line with previous findings for the similarly formulated phthalocyanine and porphyrazine Mg II analogs [71,[214][215][216]. The Pd II and Pt II metal complexes, [TPyz42PzPd] and [TPyz42PzPt], were obtained by external demetallation of their respective pentanuclear species [207,210] (see below).…”

Tetrakis(selenodiazole)porphyrazines 1: Tetrakis(selenodiazole)porphyrazine and its Mg(II) and Cu(II) Derivatives. Evidence for their Conversion to Tetrakis(pyrazino)porphyrazines through Octaaminoporphyrazines

“…After cooling, the solid material was separated by filtration and recrystallized from a benzene-ethanol mixture (5.3 g; yield 94%). The IR spectrum of 2 ((Nujol, cm À1 ): n = 3060w, 2240w, 1605m, 1583w, 1517s, 1453s, [17], and also found for the Mg(II) complex of TTDPzH 2 [8].…”

Synthesis of new octakis(benzylthio)tetraazaporphyrin complexes with bivalent transition metal ions and an investigation of their spectral, redox and catalytic properties

“…Unlike their more common tetrapyrrolic congeners, the porphyrins and phthalocyanins, they offer a much higher potential for creating structural diversity. With the inherent synthetic ease of including diverse peripheral substituents, they are seen as promising materials having potential applications in diverse areas such as chemical sensors [10][11][12][13], biomedical diagnosis [14] and therapeutic reagents [15][16][17][18][19][20][21][22][23], optical data storage [24,25], non-linear optics [26][27][28] and liquid crystals. Metallo-tetraazaporphyrins are also useful in electrographic recording [29], making magnetic toner ink [30], in molecular photovoltaics [31,32] and in making optical light switches [33].…”