Diselenide polymers

After standing for several days at room temperature, the poly(trimethylene diselenide) slowly precipitated out from the solution. Poly(trimethylene selenkle) on degradation also forms the diselenide polymer with the evolution of propylene (Eq. 78) [212]. 

Like poly(trimethylene diselenide), other higher hydrocarbon diselenide polymers were prepared either by hydrolysis of respective selenocynate... 

By condensing dibromopimelic add and sodium diselenide, Fredga and Styrman [221] reported another add group containing polymer. The add hydrolysis of di(selenocyanato)derivatives of both the roc- and meso-dibromo-pimelic acids also yielded in each case the polymeric diselenide Polymers containing both selenium and sulfur in the backbone have been reported by Bergson et al. [222] ... 

It appears remarkable that benzylic and poly(p-phenylene diselenide polymers are able to incorporate additional selenium atoms in to the chain through a simple melt alloying process, thus giving products whose structures are intermediate between organic and inorganic polymers [224,227]. Recently, poly(l,l -binaphthyl-2,2 -diselenide) was prepared along with other compounds when 2,2 -dilithio-l,l binaphthyl was reacted with selenium followed by aerial oxidation [228]. 

Reactions ctf polyftetramethylene diselenide) and poly(pentamethylene diselenide) with Br2 yielfunctional groups such as acid groups by the ring opening polymerization of l,2-diselenane-3,6-dicarboxylic add ... 

Kishore, K and Ganesh, IC Polymers Containing Disulfide, Tetrasuifide, Diselenide and Ditel-luride Linkages in the Main Chain. Vol. 121, pp. 81-122. 

Recently, Kondo and coworkers reported on the polymerization of St with diphenyl diselenides (37) as the photoiniferters (Eq. 39) [ 162]. In the photopolymerization of St in the presence of 37a and 37b, the polymer yield and the molecular weight of the polymers increased with reaction time. The chain-end structure of the resulting polymer 38 was characterized. Polymer 38 underwent the reductive elimination of terminal seleno groups by reaction with tri-n-butyltin hydride in the presence of AIBN (Eq. 40). It also afforded the poly(St) with double bonds at both chain ends when it was treated with hydrogen peroxide (Eq. 41). They also reported the polymerization of St with diphenyl ditelluride to afford well-controlled molecular weight and its distribution [163]. 

K.J. Reynolds, G.L. Frey, and R.H. Friend, Solution-processed niobium diselenide as conductor and anode for polymer light-emitting diodes, Appl. Phys. Lett., 82 1123-1125, 2003. 

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