Synthesis and characterization of new metal-free and nickel(II) phthalocyanines containing tetraazatrioxa macrotricyclic moieties

Synthesis, electrochemistry and in situ spectroelectrochemistry of water-soluble phthalocyanines

“…Electronic spectra are especially fruitful to establish the structure of the phthalocyanines. The phthalocyanines exhibit typical electronic spectra with two strong absorption regions, one of them is in the UV region at about 300-350 nm (B-band) and the other one is in the visible region at 600-700 nm (Q-band), both correlate to p-p* transitions [14][15][16][17][18][19][20][21]. The UV-Vis spectra of the phthalocyanines were highly solvent-and concentration-dependent.…”

“…Up to now, the successful separation of these four isomers with common column chromatography or by recrystallization has not been reported. No attempt has been made to separate the isomers of 1-4; these bulky substituents are expected to be efficient in hindering the aggregation of macrocyclic products [14][15][16][17][18][19][20][21][24][25][26][27]. The green or blue products were extremely soluble in various solvents such as chloroform, DCM, THF, DMF and DMSO.…”

“…Adding functional groups on the periphery that increase the distance between the 18-p electron-conjugated systems of Pcs enhances the solubility of these compounds [14][15][16][17][18][19][20][21]. The size and the nature of the substituents are not the only criteria for the solubility of the substituted phthalocyanines; the change in symmetry caused by these groups on the periphery is also important.…”

Novel water-soluble metal-free and metallophthalocyanines: Synthesis, spectroscopic characterization and aggregation properties

“…The phthalocyanines exhibit typical electronic spectra with two strong absorbtion regions, one of them is in the UV region at about 300-350 nm (B band), and the other one is in the visible region at 600-700 nm(Q band), both correlate to → * transitions [29][30][31]. The UV-Vis spectra of the phthalocyanines were highly solvent-and concentration-dependent.…”

Synthesis, Characterization, Aggregation behaviors, Antioxidant and Anti-inflammatory activities of Unmetalled and metallophthalocyanines bearing 2(3,4-dimethoxyphenyl)ethanol and 4-Hydroxybenzaldehyde groups

“…Both correlate to π-π* transitions [21][22] . The electronic spectrum of compound 3 showed characteristic two absorptions in the UV/vis region in DMSO: one of them was in this region at about 650-679 ppm.…”