Single-strand conjugated complex

The difference in the ratio is accounted for as follows. Two coordination sites are available with Pd(OAc)2 or PdCl2(MeCN)2, but the complex 3 bearing the tri-dentate ligand has only one free coordination site. A cross-linked polyaniline network complex 4 is considered to be formed in the former case. On the contrary, the latter complexation affords the single-strand conjugated complex 5. Thus, a hybrid system composed of transition metals and 7C-conjugated polymers is controlled structurally (Fig. 3.11). 

Scheme 3.18 Control formation of the single-strand conjugated complex 12 and the cross-hnked conjugated complexes 13...

Linearly expanded porphyrin oligomers and polymers with enhanced third-order susceptibilities have also been reported. In solution the conjugation lengths of single-strand chains can be strongly limited by rotation and disorder. The self-assembly of double-strand ladder complexes of porphyrin butadiyne oligomers 21 achieves amplification in the nonlinearity... 

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