Synthesis and Characterization of Crown‐Ether‐Containing Phthalocyanines with Group‐IV‐A Elements
1988; Wiley; Volume: 71; Issue: 7 Linguagem: Inglês
10.1002/hlca.19880710705
ISSN1522-2675
AutoresVefa Ahsen, Emel Yilmazer, Ayşegül Gürek, Ahmet Gül, Özer Bekâroĝlu,
Tópico(s)Magnetism in coordination complexes
ResumoAbstract 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.
Referência(s)