Self-Organization of Phthalocyanines on Surfaces by Solution-Processable Techniques

2 Self-Organization of Phthalocyanines on Surfaces by Solution-Processable Techniques 

The utilization of solution-processable techniques for the fabrication of Pc-based nanoscale systems represents a relatively cheap and technologically appealing methodology, when compared to vacuum techniques, for the preparation of nano-structured architectures. 

In this context, solutions of octaalkoxy substituted CuPcs drop-casted on silica surfaces give rise to the formation of highly homogeneous, 1-D (in the case of the octa(n-butoxy) CuPc) or 2-D (in the case of the octa(n-octyloxy) CuPc) aggregates [208], Density functional computations have revealed that a combination of in-plane interactions and displaced parallel stacking for Pcs are responsible for the different self-assembled structures. 

The possibility to couple the excellent self-organization ability of the Pcs with a magnetic property has also been sought through the preparation of a single-molecule magnet (SMM) alkoxy-substituted bis(phthalocyaninato)terbium(III) 30 (Fig. 26a). 

More recently, another example of a Pc-based system (31) (Fig. 27a) able to self-organize on HOPG and graphite-like surfaces by drop-casting technique was reported. AFM studies revealed that the covalently linked Pc-C6o fullerene conjugate 31 is able to form nanostructured fibers and films (Fig. 27b) [48], 

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