Self-assemblies through coordination formation

They also form self-assembled /-dimers in non-coordinating solvents probably through coordination of one of the diethylamino nitrogen atoms with the central metal of adjacent molecule. Upon addition of pyridine, they are converted back to the monomeric species. The fluorescence is significantly quenched and the efficiency of singlet oxygen formation is also reduced as a result of intramolecular photoinduced electron transfer, which is inhibited in the dimers. 

Many organoantimony(III) halides are Lewis amphoteric. They have acidic sites on the Sb atoms and they are also basic through the lone pairs of electrons on the halogen atoms. A frequently encountered consequence of this dual nature is the formation of coordination polymers in the solid state. The resulting structures formed through self-assembly of molecules were considered in a book and in a review article. The Lewis acidity of organoantimony halides is also reflected in the tendency to form stable adducts with neutral donors or with halide anions. The 1 1 adduct (2) is formed by reaction of methylantimony dichloride with 2,2 -bipyridine. " ... 

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