Conjugated carbonyl polymers

Reductions. Polymer-bound Rhg(CO)jj catalyzes the reduction of conjugated carbonyl compounds leading to allylic alcohols. On the other hand, the bimetallic catalyst Rhg(CO),g -RejfCOjjg converts amides to amines. ... 

FTiR (wavenumber-assignment) crrrV- amides - 1635 conjugated carbonyls - 1700 aldehydes-1725 isolated carboxylix acids - 1760 Yoshioka, Y Tashiro, K Ramesh, C, J. Polym. Sci. B, 41, 1294-1307, 2003 Cerruti, P Lavorgna, M Carfagna, C Nicolais, L, Polymer, 46,4571-83, 2005. 

Fig. 1.3. Absorption spectra of small impurities which can exist in commercial polymers (a) conjugated double bonds and (b) conjugated carbonyl groups.

Such carbonyls may be further oxidized using potassium permanganate (KMnO and perchloric acid (HCIO4) to convert all of these groups into carboxylic acids. Once functionalized in this manner, the nanotubes can be fully dispersed in aqueous systems. Kordas et al. (2006) used these derivatives to print nanotube patterns on paper or polymer surfaces to create conductive patterns for potential use in electronic circuitry. The carboxylates also may be used as conjugation sites to link other ligands or proteins to the nanotube surface using a carbodiimide reaction as previously discussed (Section 1, this chapter Chapter 2, Section 1.11 Chapter 3, Section 1). 

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