Lanthanides, Schiff base polymers

A connectivity of 1 is given for side chain metal-containing polymers as 1 in which the metal complex is connected via one bond to the main chain [11]. Additional examples for other connectivities are (Fig. 1-8) connectivity 2 in metal(yne)s 2 [12] connectivity 3 in arsenic(III) sulfide 3 connectivity 4 in a polymeric methyl rhenium oxide of the formula Ho.5[(CH3)o.92Re03] co 4 [13] or polymeric phthalocyanines 5 [14] connectivity 8 in lanthanide complexes of bis(tetradendate) Schiff base bridging ligands 6 [15]. 

Polynuclear Lanthanide Complexes and Lanthanide Coordination Polymers with Flexible Schiff-Base Ligands 286... 

The synthesis, structures, and luminescence properties of polynuclear lanthanide complexes and lanthanide coordination polymers, which are formed from multidentate oxygen and nitrogen-containing Schiff-base ligands, are described in this chapter. 

POLYNUCLEAR LANTHANIDE COMPLEXES AND LANTHANIDE COORDINATION POLYMERS WITH FLEXIBLE SCHIFF-BASE LIGANDS... 

Two kinds of salen-type Schiff-base ligands, conjugated and flexible, have been used in the synthesis of polynuclear lanthanide complexes and lanthanide coordination polymers Lanthanides Coordination Chemistry, Rare Earth Metal Cluster Complexes. The stoichiometry and structures of these complexes are dependent on the Schiff-base... 

All the Schiff s base complexes discussed so far are low-molecular weight complexes. An erbium(lll)-containing methacrylate metallopolymer was prepared by free-radical polymerization of a Schiff s base monomer LllH, followed by complex formation with hydrated erbium nitrate (Haase et al., 1996). By XRD, the presence of a smectic mesophase was shown. A special feature of the polymer is that the complexing group is an Ai-aryl substituted Schiff s base, rather than an Ai-alkyl substituted one. No further structural data were reported. A detailed study of the mesophase behavior of lanthanide complexes of Ai-aryl substituted Schiff s base ligands LllH was reported by Rao et al. (2002, 2010). The complexes were synthesized by reaction between the... 

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