Synthesis and characterization of some octaalkyl substituted lead phthalocyanines and unexpected variations in lead lability arising from the position of substituents and their chain length
作者： Lydia X. Sosa-Vargas , Isabelle Chambrier , Colin J. MacDonald , Simon J. Coles , Graham J. Tizzard
DOI: 10.1142/S108842461350020X
关键词:
摘要: The preparation of some peripherally substituted (2,3,9,10,16,17,23,24) and non-peripherally (1,4,8,11,15,18,22,25) octaalkyl lead(II) phthalocyanines with different alkyl chain lengths (6, 7, 8 or 9 carbons) is described a comparison their properties reported. X-ray structure analyses the isomeric peripheral non-peripheral octakis(octyl)phthalocyaninato compounds reveal greater degree distortion ligand ring system from planarity in former derivative. series exhibit columnar liquid crystal behavior whereas isomers do not. lability lead ion was investigated using 1H NMR spectrometry under specific set conditions (8.8 × 10-4 M solutions phthalocyanine d8-toluene containing d4-acetic acid 2.06 10-5 M). All underwent catalyzed demetalation at rates dependent upon location substituents and, more surprisingly, length groups. Under these within each labile than that isomer.
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