Specific Features of Cation-Induced Aggregation of Tetracrown-Substituted Aluminum(III) Phthalocyaninatesстатья
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Аннотация:The cation-induced dimerization of tetra-(15-crown-5)-substituted Al(III) phthalocyaninate with
Na+, K+ and Rb+ salts in solution has been studied by 1 H NMR. It has been demonstrated that two types of supramolecular dimers coexist in solutions, which is consistent with the existence of both the monomeric and oxygen-bridged dimeric forms of the initial Al(III) complex. With the use of mass spectrometry (MALDI-TOF and HR-ESI), it has been shown that Al(III) monophthalocyaninate [(OH)AlR4Pc] forms supramolecular dimers {[M4(XAlR4Pc)2]4+(X−)4}, whereas Al(III) μ-oxodiphthalocyaninate [(AlR4Pc)2(μ-O)] forms oxygen-bridged supramolecular dimers {[M4(XAlR4Pc)2(μ-O)]2+(X−)2}.