Nanostructured Poly Thiophenes

Nanocomposites consisting of a Ti02 core with a grain size of 25-250 nm and a PTh shell between 1 and 2 nm in thickness have been produced [135]. The presence of two 

Poly(terthiophene) and poly(3,4-ethylenedioxythiophene) (PEDOT) with fibrillar (50-100 nm) morphologies have been achieved by chemical polymerization in a biphasic 

Thin films of poly(3-hexylthiophene-2,5-diyl) and poly(3-octylthiophene-2,5-diyl) mixed with two electron-accepting polyquinolines [159] show quenching of the steady-state photoluminescence and a shortening of the fluorescence lifetime of the polyquinolines, suggesting photoinduced electron transfer from polythiophene to polyquinoline at the polyquinoline/polythiophene interface. A new, weak and red-shifted emission band centered at 630 nm and reduced lifetimes show the formation of intermolecular exciplexes at the polyquinoline/polythiophene interface. Exciton diffusion lengths in the polyquinolines have been estimated to be 17-22 nm. 

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B. W. Maynor, S. F. Filocamo, M. W. Grinstaff, J. Liu, Direct-writing of polymer nanostructures poly(thiophene) nanowires on semiconducting and insulating surfaces, Journal of the American Chemical Society 2002, 124, 522. 

In the second approach to self-assembly of polymer-silica nanocomposites, polymerizable surfactants are employed both to direct self-assembly into ordered mesophases and to serve as organic monomers which can be subsequently polymerized. For instance, Brinker et al. developed nonionic surfactants incorporating diacy-telene groups which could be polymerized upon irradiation by UV light.68 69 Similarly, poly(thiophene)70 and poly(pyrrole)71 have been successfully integrated into silica nanostructures in this manner. Importantly, this in situ polymerization produces isolated molecular wires, rather than clustered bundles of conductive polymer.70... 

Conducting poly thiophene (PTh)-SWCNTs composites were synthesized by the in situ chemical oxidative polymerization method.Using an excitation wavelength of 514 nm, the authors studied the pristine and the derived materials. The Raman spectrum for the SWCNT PTh composites is clearly an addition of the corresponding spectra of PTh and SWCNTs, demonstrating that SWCNTs served as templates in the formation of a co-axial nanostructure for the composites. ... 

B. Li, G. Sauve, M. C. lovu, M. Jeffries-EL, R. Zhang, J. Cooper, S. Santhanam, L. Schultz, J. C. Revelli, A. G. Kusne, et al. Volatile Organic Compound Detection Using Nanostructured Copolymers. Nano Lett. 2006,6,1598-1602. Q. Zhang, A. Cirpan, T. P. Russell, T. Emrick, Donor-Acceptor Poly(Thiophene-B/ock-Perylene Diimide) Copolymers Synthesis and Solar Cell Fabrication. Macromolecules 2009,42,1079-1082. 

Poly (thiophene)s are of particular interest as electfochromic materials owing to their chemical stability, ease of synthesis and processability. For the most part, current research has been focused on composites, blends and copolymer formations of several conjugated polyheterocyclics, polythiophene and its derivatives, especially PEIX)T. In one example, poly(3,4-ethylenedioxythiophene) (PEDOT)/poly(2-acrylamido-2-methyl-l-propanesulfonate) (PAMPS) composite films were prepared by Sonmez et al. for alternative electrochromic applications [50]. Thin composite films comprised of PEDOT/PAMPS were reported to switch rapidly between oxidized and neufial states, in less than 0.4 s, with an initial optical contrast of 76% at A.max. 615 nm. Nanostructured blends of electrochromic polymers such as polypyrrole and poly(3,4-ethylenedioxythiophene) were developed via self-assembly by Inganas etal. for application as an electrochromic window [26]. Uniir etal. developed a graft-type electrochromic copolymer of polythiophene and polytetrahydrofuran for use in elecfiochromic devices [51]. Two EDOT-based copolymers, poly[(3,4-ethylenedioxythiophene)-aZ/-(2,5-dioctyloxyphenylene)] and poly[(3,4-ethylenedioxythiophene)-aft-(9,9 -dioctylfluorene)] were developed by Aubert et al. as other candidates for electrochromic device development [52],... 

The variation of nanostructures in conjugated rod-coil block copolymers holds considerable promise as the active layer in volatile organic compound (VOC) chemresistor sensors. It was reported that poly thiophene rod-coil block copolymers could vary their electrical conductivity by changing rod-coil ratios when they were exposed to a variety of VOC vapors... 

Conducting polymers Polythiophene Sensor/array of sensor based on block copoly-mers of poly thiophenes nanostructures fabri-cated through ink-jet printing on prefabricated electrode Ethanol 10 ppm fin all analytes i2-24... 

Y. Zhang, K. Tajima, K. Hashimoto, Nanostructure Formation in Poly(3-Hexylthiophene-B/ocfc-3-(2-Ethylhexyl)Thiophene)s. Macromolecules 2009, 42, 7008-7015. 

Zhang Y, Tajima K, Hashimoto K (2009) Nanostructure formation in poly(3-hexylthiophene-block-3-(2-ethylhexyl)thiophene)s. Macromolecules 42 7008-7015... 

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