Conjugation oligomers

This article, while not being intended to provide a full account of poly(arylene)s, emphasises the synthetic aspects. The synthesis of conjugated oligomers and polymers is, however, always part of an interdisciplinaiy approach with their active physical function being a key concern. In that sense the research being reviewed above concentrates on physical properties rather than playing with exotic chemical structures. 

In order to summarize this section it must be noted that the possibility to evaporate conjugated oligomers in such a way that their chain axes point predominantly in one direction allows us to determine the anisotropic electronic properties of conjugated molecules. From these studies it becomes evident that in order to obtain polarized absorption or emission of light as required in polarization Filters or LCD-backlights, the application of conjugated molecules is one of the most attractive areas of application for these materials. 

Finally, we would like to point that one of the easiest ways to influence the electronic properties of conjugated oligomers and polymers is to vary the chain... 

Overall, an unambiguous description of the current flow to a certain injection and transport model can not be obtained, as demonstrated by the example of LEDs based on Alq3. Similar to the organic molecule Alq3 and also the conjugated oligomer hexaphcnyl, it has been observed that many models presented above seem to describe the 1/V characteristics correctly [I02. ... 

Another way of obtaining information on the time-averaged mobility of charge carriers on their way across a sample of arbitrary thickness is, to simultaneously measure the current and the stationary charge earners density via transient absorption and to infer the mobility from j-rnpF. Such experiments have been performed on blends of conjugated oligomers derived from /m-siilbene amine and a... 

Chapter 5, written by M. Hissler, P. W. Dyer, and R. Reau, concerns an area of important expansion, i.e., the synthesis and properties of rr-conjugated oligomers and polymers containing phosphorus moieties. The possibility of using... 

Spano, F. C. 2006. Excitons in conjugated oligomer aggregates, films and crystals. Annu. Rev. Phys. Chem. 57 217-243. 

R. E. Martin, F. Diederich, Linear Monodisperse ji-Conjugated Oligomers Model Compounds for Polymers and More , Angew. Chem. Int. Ed. Engl. 1999, 38, 1350-1377. 

Figure 4. (Phenylene ethynylene)-based conjugated oligomers prepared in solution using a bi-direction growth approach with in situ deprotection and coupling.

R. Wu, J. S. Schumm D. L Pearson, J. M. Tour, Convergent Synthetic Routes to Orthogonally Fused Conjugated Oligomers Directed Toward Molecular Scale Electronic Device Applications, I. Org. Chem. 1996, 61, 6906-6921. 

J.-F. Morin, N. Drolet, Y. Tao, and M. Leclerc, Syntheses and characterization of electroactive and photoactive 2,7-carbazolenevinylene-based conjugated oligomers and polymers, Chem. Mater., 16 4619-4626, 2004. 

YV Romanovskii, A Gerhard, B Schweitzer, U Scherf, RI Personov, and H Bassler, Phosphorescence of TT-conjugated oligomers and polymers, Phys. Rev. Lett., 84 1027-1030, 2000. 

Y Geng, ACA Chen, JJ Ou, SH Chen, K Klubek, KM Vaeth, and CW Tang, Monodisperse glassy-nematic conjugated oligomers with chemically tunable polarized light emission, Chem. Mater., 15 4352-4360, 2003. 

Bredas J-L, Comil J, Beljonne D, Santos DAD, Shuai Z (1999) Excited-state electronic structure of conjugated oligomers and polymers a quantum-chemical approach to optical phenomena. Acc Chem Res 32 267-276... 

Bredas J-L, Beljonne D, Coropceanu V, Comil J (2004) Charge-transfer and energy-transfer processes in 7i-conjugated oligomers and polymers a molecular picture. Chem Rev 104 4971-5003... 

Liu B, Gaylord BS, Wang S, Bazan GC (2003) Effect of chromophore-charge distance on the energy transfer properties of water-soluble conjugated oligomers. J Am Chem Soc 125 6705-6714... 

Schumm JS, Pearson DL, Tour JM (1994) Angew Chem 33 1360-1363 Iterative divergent/convergent approach to linear conjugated oligomers by successive doubling of the molecular length... 

Martin RE, Diederich F Angew Chem Int Ed (1999) 38 1350-1377 Linear monodisperse n-conjugated oligomers model compounds for polymers and more... 

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