The facile synthesis and characterization of tetraimido-substituted zinc phthalocyanines

Characteristic absorption band split of symmetrically tetra-octyloxy metal phthalocyanines

“…It was thought that protonation on aza-nitrogen atom obstructed n-π* transition of lone pair electrons in sp 2 orbit and accordingly benefit the large π planar conjugation over Pc ring. The enhanced conjugation inevitably decreased HOMO-LUMO energy gap and then brought monoprotonated Pc with a shift-red Q R relative to Q L of unprotonated Pc, for enlarged conjugate structure and enhanced conjugation of Pc compounds generally leading to Q band shift red largely [5,[42][43][44][45]. In terms of αOZnP, the linker oxygen atom is fixed by proton in nearby aza-nitrogen atom when protonation reagent existed for the advantage in steric hindrance (Fig.…”

Synthesis, characterization and photophysical properties of novel tetrasubstituted phthalocyaninato zinc derivatives

“…The degraded product was further analyzed to be tetraaminophthalocyaninato zinc according to the literature [31]. So we concluded that compounds 1-3 could be rapidly decompounded to tetraaminophthalocyaninato zinc by NaOH in DMF through Gabriel reaction, and their stabilities were very poor under basic condition with OH À [33].…”

“…It is convenient for us to separate and purify the aimed compound from crude products. Herein the synthetic strategy of acidylation of amino-group comprises was only one step reaction and the compounds were purified with simple washing [33], which differs from the common method by cyclotetramerization of substituted phthalonitriles.…”

New Zinc (II) Phthalocyanines Substituents: Synthesis, Aggregation Behavior, Antioxidant, and Antibacterial Activity

“…Thanks to these special and exclusive properties, Pcs have led to numerous interests in many fields, such as therapeutic medicine, photosensitizers for photodynamic therapy of cancer (PDT) [2] and antioxidant [3]. Besides, many otherapplications have appeared, including nonlinear optics [4], optical filters [5], liquidcrystalline electronic charge carriers [6], Langmuir-Blodgett films [7], chemical sensor [8], ink-jet printing [9], optical read-write disks [10], catalysis [11], layers of gas sensors [12]solar cells [13], exciton-transport materials, semi-conductors [14] in addition to their traditional use as dyes and pigments [15]. Due to the intermolecular interactions between the macrocycles, many metal free phthalocyanines(Pcs) and metallophthalocyanines compounds are generally insoluble in organic solvents.…”

“…Phthalocyanines (Pcs) are one of the important tetrapyrrole derivatives, formally known as tetrabenzo [5,10,15,20]tetraazaporphyrins, are more stable analogs of the porphyrins and porphyrazines, but ,unlike porphyrins, they do not occur in nature as they are totally synthetic compounds [1]. The fully conjugated 18 π electronic structure of Pcs gives to their structure, good thermal, optical stability and intense absorption bands in visible area.…”