Functional Organic Materials: Syntheses, Strategies and by Thomas J.J. Müller, Uwe H.F. Bunz

By Thomas J.J. Müller, Uwe H.F. Bunz

This well timed review of the syntheses for practical pi-systems specializes in aim molecules that experience proven fascinating houses as fabrics or types in physics, biology and chemistry. the original thought permits readers to pick the fitting man made method for achievement, making it valuable for a few business purposes. A "must have" for everybody operating during this new and swiftly increasing box.

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The polymer host selectively suspends nanotubes relative to impurities and, after removal by filtration, a 91 % pure CNT fraction was obtained [235]. The wrapping of SWNTs with polymers carrying polar side-chains such as polyvinylpyrrolidone (PVP) or PSS led to stable solutions of the corresponding SWCNT–polymer complexes in water [236], the SWCNT– PVP complex exhibiting liquid crystalline properties. The thermodynamic driving force for this complex formation is suggested to be the avoidance of unfavorable interactions between the apolar tube walls and the solvent water.

This allows for enrichment of large-diameter single-walled carbon nanotubes by using a mixed concentrated H2SO4 –HNO3 treatment [81]. Solution-phase mid-IR spectroscopy was used to assess the amount of functionality introduced into SWNTs by oxidation. For a [10, 10] SWNT containing 40 carbon atoms in the unit cell, 20 carboxylic acid groups at each end of the tubes were found. 46)] and 40 carboxylic acid groups [82]. Zhang et al. [83] claim to have improved the efficiency of nanotube oxidation and functionalization by using KMnO4 as oxidant and a PTC.

Functionalization obviously modified the electronic state of pristine CNTs; however, some of the metallic character was retained and the overall electron density of states (DOS) was not strongly affected [167]. Pyrrolidino-SWCNTs and -MWCNTs bearing a free amino-terminal N-oligoethylene glycol moiety formed supramolecular associates with plasmid DNA through ionic interactions. The complexes were able to penetrate within cells. SWCNTs Fig. 9 1,3-Dipolar cycloaddition of ferrocene-modified azomethine ylide to SWCNTs in order to functionalize CNT sidewalls with electron donor units.

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