Sandwich-type Metal Porphyrin, Phthalocyanine (naphthalene) Phthalocyanine Synthesis And Properties Of Complexes,

The compounds that later called phthalocyanine (Pc) was first observed by chance as a highly coloured by-product in the chemical conversion of the ortho-(1,2)-disubstituted benzene derivatives. Phthalocyanines (Pcs) are planer macrocycles related to porphyrins constituted by four isoindole units presenting an 18 Ï€-electron aromatic could delocalized over an arrangement of alternated carbon and nitrogen atoms. Porphyrins and their non-naturally occurring analogues, phthalocyanines, are the most common and important tetrapyrrole derivatives. Both series of macrocycles can form metal complexes with almost all the metals in the Periodic Table. Rare earths, actinides, and some early transition metals and main group elements form sandwich-type complexes with these ligands in the forms of double- and triple-deckers, which emerge to be an important class of functional materials. The bis(phthalocyaninato) rare earth sandwich complexes have been known since the middle of 1960s, while the studies of bis(porphyrinato) counterparts were started in 1980s. Bis(phthalocyaninato) metal complexes, especially the rare earth double-deckers, possess intriguing and unique electronic and optical properties which render them useful in materials science due to their possible applications in molecular electronics, molecular information storage, and nonlinear optics. To understand the nature of the ring-to-ring interactions in these bis- and tris-(tetrapyrrole) metal complexes, a substantial number of heteroleptic sandwich compounds with different porphyrinato, naphthalocyaninato and/or phthalocyaninato ligands have been prepared and examined in recent years. Our research work in this field has been focused on the following respects: 1. Heteroleptic rare earth double-decker complexes with naphthalocyaninato andphthalocyaninato ligands. General synthesis,, spectroscopic, andelectrochemical characteristicsA novel one-pot procedure, starting from the corresponding M(acac)₃.nH₂O, metal-free phthalocyanine H₂Pc', and naphthalonitrile in the presence of DBU in n-octanol, has been developed to prepare heteroleptic...