Premium
Synthesis and Characterization of Crown‐Ether‐Containing Phthalocyanines with Group‐IV‐A Elements
Author(s) -
Ahsen Vefa,
Yilmazer Emel,
Gürek Ayşegül,
Gül Ahmet,
Bekâroǧlu Özer
Publication year - 1988
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19880710705
Subject(s) - chemistry , phthalocyanine , crown ether , quinoline , tin , polymer chemistry , thermal decomposition , metal , thermal stability , ether , hydrolysis , aqueous solution , condensation polymer , catalysis , inorganic chemistry , medicinal chemistry , organic chemistry , ion
Group‐IV‐A phthalocyanines with four crown ether substituents have been prepared from 4′,5′‐dicyanobenzo(15‐crown‐5), 4′,5′‐diiminoisoindolino(15‐crown‐5), or metal‐free phthalocyanine and the corresponding metal salts. The axial ligands of dichloro[tetra(15‐crown‐5)phthalocyaninato]silicon or ‐tin have been converted into dihydroxy derivatives by hydrolysis in aqueous Et 3 N. The catalytic effect of H 2 O‐free CaC1 2 in quinoline is used for the polycondensation of dihydroxysilicon‐phthalocyanine to cofacially arrayed polymers. The thermal stability of group‐IV‐A‐metal phthalocyanines is confirmed by the higher initial decomposition points (290–440°) compared to those of the corresponding transition‐metal phthalocyanines.