Poly charge transport

Electrochemical oxidation of X produces a polymer film with polythiophene as the backbone and viologen centers as pendant redox groups. The electrochemical properties of the polymer are the combination of polythiophene and viologen. Using viologen subunits as the internal standard (one per repeat unit of the polymer), the "doping level" of the oxidized polythiophene backbone at its maximum conductivity can be measured and is about 25%. The charge transport via the pendant V2+/+ of poly(l) has been studied by... 

Fig. 5 Chemical structure of poly[2,5-dioctyloxy-l,4-diethynylphenylene-fl/t-2,5-bis(2 -ethylhexyloxy)-l,4-phenylene] (EHO-OPPE), the alkyloxy-PPE employed in the charge-transport studies by Weder and Singer et al. [61,62]...

It was straightforward to apply the TRMC technique to study on-chain charge transport to ladder-type poly-phenylene (LPPP) systems because covalent bridging between the phenylene rings planarizes the chain skeleton, eliminates ring torsions, and reduces static disorder. One can conjecture that in these systems intra-chain motion should be mostly limited by static disorder and chain ends. To confirm this... 

Tanase C, Wildeman J, Blom PWM, Mena Benito ME, de Leeuw DM, van Breemen AJJM, Herwig PT, Chlon CHT, Sweelssen J, Schoo HEM (2005) Optimization of the charge transport in poly(phenylene vinylene) derivatives by processing and chemical modification. J Appl Phys 97 123703... 

Prins P, Grozema FC, Schins JM, Savenije TJ, Patil S, Scherf U, Siebbeles LDA (2006) Effect of intermolecular disorder on the intrachain charge transport in ladder-type poly (p-phenylenes). Phys Rev B 73 045204... 

We have a specific interest in the self-assembled structures formed by poly(ferrocenylsilane) block copolymers, such as poly(ferrocenyldimethylsilane-Z -dimethyl-siloxane) (PFS-PDMS) and (ferrocenyldimethylsilane-Z>-isoprene) (PFS-PI). The PFS block contains an iron atom in the main chain repeat unit. These polymers are particularly promising for novel applications, since they can be used as charge-transport materials and, by pyrolysis, as precursors to ferromagnetic ceramics [4-6], Moreover, they can by synthesized with a very narrow molar mass distribution, with excellent control over chain length and composition [7], An important feature of PFS is that the polymers bearing two methyl groups on the silane unit are crystalline, whereas polymers with two different substituents on each silane (methyl, ethyl methyl, phenyl) are atactic and remain amorphous. This feature of the polymer composition has a strong influence on the type of self assembled structures that these poly-... 

P. Kumar, A. Misra, M.N. Kamalasanan, S.C. Jain, R. Srivastava, V. Kumar, Charge transport through conducting organic poly(2-methoxy-5-(2-ethylhexyloxy)-l,4-phenylene vinylene),./. Phys. D Appl. Phys. 40 (2007) 561. 

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