Pi-conjugated polymers

S.V. Frolov, W. Gellermann, M. Ozaki, K. Yoshino, Z. V. Vardeny, Cooperative emission in pi-conjugated polymer thin films, Phys. Rev. Lett. 1997, 78, 729. 

Panda P, Veldman D, Sweelssen J, Bastiaansen J, Langeveld-Voss BMW, Meskers SCJ (2007) Charge transfer absorption for pi-conjugated polymers and oligomers mixed with electron acceptors. J Phys Chem B 111 5076... 

Zhou Y, Itoh H, Uemura T, Naka K, Chujo Y (2002) Preparation, optical spectroscopy, and electrochemical studies of novel pi-conjugated polymer-protected stable PbS colloidal nanoparticles in a nonaqueous solution. Langmuir 18 5287-5292... 

X(3) values for a number of amorphous polysilanes as measured by the Maker fringe technique are reported in Table I. These values are quite large for a sigma-bonded system as predicted by the highly polarizable nature of the polymer backbone and the intense oa electronic transition in the ultraviolet. In some cases, the numbers are as large as those reported for a number of pi conjugated polymers... 

The newest series of polymers based on a phosphorus-carbon backbone are poly(meth-ylenephosphines) of structure [-P(R)-CR2-] , produced by the polymerization of phospha-alkenes, P(R)=CR2.47a These polymers react with oxygen to form species of type [-P(R)(0)-CR2-] . A related polymer with phenyl rings in the backbone has also been described.47b This is a pi-conjugated polymer with P=C bonds in the main chain. 

Kersting R, Lemmer U, Mahrt RF, Leo K, Kurz H, Bassler H, Gobel EO (1993) Femtosecond Energy Relaxation in Pi-Conjugated Polymers. Phys Rev Lett 70(24) 3820-... 

Wohlgenannt M, Tandon K, Mazumdar S, Ramasesha S, Vardeny ZV (2001) Formation cross-sections of singlet and triplet excitons in pi-conjugated polymers. Nature 409(6819) 494-497... 

Monkman AP, Burrows HD, Hartwell LJ, Horsburgh LE, Hamblett I, Navaratnam S (2001) Triplet energies of pi-conjugated polymers. Phys Rev Lett 86(7) 1358—1361... 

List EJW, Scherf U, Mullen K, Graupner W, Kim CH, Shinar J (2002) Direct evidence for singlet-triplet exciton annihilation in pi-conjugated polymers. Phys Rev B 66(23) 235203-1-235203-5... 

In the quest for systems having large NLO properties one is often interested in quasilinear stereoregular pi-conjugated polymers. Altliough such polymers in practice have a finite conjugation length, the infinite chain limit is a useful model. 

M J. MacLachlan, Metal-containing pi-conjugated polymers, in A.S. Abd-El-Aziz and I. Manners (Eds.), Frontiers in Transition Metal-Containing Polymers, Wiley, Chichester, 2007. 

J.L. Reddinger and J.R. Reynolds, Molecular engineering of pi-conjugated polymers in Radical Polymerisation Polyeletrolytes Springer, Berlin, 1999, pp. 57-122. 

M. Brun, R. Demadrille, P. Rannou, A. Pron, J.P. Travers, and B. Grevin, Multiscale scanning tunneling microscopy study of self-assembly phenomena in two-dimensional polycrystals of pi-conjugated polymers the case of regioregular poly (dioctylbithiophene-alt-fluore-none). Adv. Mater., 16, 2087 (2004). 

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