Defect Free (100% rr) Poly(3-hexylthiophene)

We are happy to announce the production of DEFECT FREE (100% regioregular) P3HT at large scale.  These samples are highly crystalline (~70% from DSC) and have low polydispersity (<1.6). In fact, we obtained a highly luster with metallic green color thick films after purification (as shown below).

 

Picture of our Defect Free P3HT
We offer our product at very competitive pricing. In our own small way, our intention is to contribute towards making devices based on P3HT more viable in terms of quality and price. We intend to extend the same philosophy to our other products also. Currently these samples are available in number average molecular weights of 25-65 kDa with PDI ~1.6.

Characterization of Defect Free Nature of our P3HT using 1H NMR:

Figure: 1H NMR analysis of defect free P3HT in CDCl3 (symbol # designates 13C satellite signals); (a) and (b) are expanded spectra in aromatic and aliphatic regions respectively where (C) shows full spectrum.  Analysis was done based on  i) Kohn, P.; Huettner, S.; Komber, H.; Senkovskyy, V.; Tkachov, R.; Kiriy, A.; Friend, R. H.; Steiner, U.; Huck, W. T. S.; Sommer, J.-U.; Sommer, M.  J. Am. Chem.  Soc.  2012, 134, 4790 and ii) Senkovskyy, V.; Sommer, M.; Tkachov, R.; Komber, H.; Huck, W. T. S.; Kiriy, A. Macromolecules 2010, 43, 10157.


The defect free nature of the P3HT was confirmed based on following analysis:

a) The absence of two singlet of equal intensity at 6.86 and 6.93 confirm the absence of TT defect at the chain end group carrying bromine;
b) The absence of signal at 7.0 ppm confirms the absence of TT defect within the chain;
c) The presence of two doublets at 7.16 and 6.93 ppm further confirm the defect free nature of the P3HT