Dynamics of redox processes and electrochromism of films of zirconium (IV) phthalocyanines with out-of-plane β-dicarbonyl ligands

Electrochemistry and spectroelectrochemistry of zirconium(IV) and hafnium(IV) phthalocyanines with b-diketone axial ligands

“…[15][16][17][18][19][20][21][22][23][24][25][26][27] Metallophthalocyanines in which the central atom has a valence of three or more are known to possess one or two out of plane axial ligands. [28][29][30][31] We recently reported the synthesis of zirconium and hafnium phthalocyanine complexes with various β-diketones and polyphenols which were made by replacing the two Cl -ions of the dichloro(phthalocyanine) complexes with organic ligands [17,23,24,27] and this was followed by a preliminary electrochemical study on some of these compounds.…”

Metal ion sensing soluble α or β tetrasubstituted gallium and indium phthalocyanines: Synthesis, characterization, photochemistry and aggregation behaviors

“…When compared to U D of ZnPc to a or b tetrasubstituted phthalocyanine complex (3)(4)(5)(6) were found lower than expect in 0.56 for ZnPc in DMF. The results of gallium metallophthalocyanines were observed as close to zinc phthalocyanines but, the results of indium metallophthalocyanines were lower observed.…”

“…UV/Vis spectra of the phthalocyanine complexes (3-6) exhibited characteristic absorptions in the Q-band region at around 650-700 nm, attributed to the p-p ⁄ transition from the HOMO (highest occupied molecular orbital) to the LUMO (lowest unoccupied molecular orbital) of the Pc 2À ring, and in the B band region (UV region) at around 300-400 nm, arising from the deeper p-p ⁄ transitions. The Q-band absorptions of p-p ⁄ transition for all phthalocyanines (3)(4)(5)(6) in THF were observed as a single band of high intensity at 704 nm for 3, 710 nm for 4, 734 nm for 5, 740 nm for 6. There was also a shoulder at the slightly higher energy side of the Q band for each phthalocyanine.…”

“…In this study, the aggregation behavior of synthesized a or b tetrasubstituted phthalocyanine complex (3)(4)(5)(6) were investigated at different concentrations and solvent. Because aggregation behavior of phthalocyanines are important both investigation of photophysical and photochemical and to perform of sensor properties (as a example 5 ( Fig 4A) and 3 (Fig 4B) were given in THF).…”

“…Due to their excellent stability in a wide variety of chemical environments chemical and thermal stability and flexible preparation methods, substituted phthalocyanines (Pcs) has been studied for especially recent years [2]. Metalphthalocyanines (MPcs) have received a great deal of attention due to their interesting electrical, optical and structural properties, followed by numerous application for example chemical sensors [3,4], photoconductors [5], electrochromic display [6], catalysis [7], liquid crystal [8], nanotechnology [9] and especially, photosensitizers for photodynamic cancer therapy (PDT) [10,11]. Phthalocyanines (Pc) have been proved as highly promising photosensitizers for PDT (photodynamic therapy) due to their intense absorption in the red region of the visible light [12].…”