Henson, Zachary B. published the artcileSynthesis and Properties of Two Cationic Narrow Band Gap Conjugated Polyelectrolytes, COA of Formula: C21H26Br4S2, the publication is Journal of the American Chemical Society (2013), 135(11), 4163-4166, database is CAplus and MEDLINE.
We report the design, synthesis, and optical and electronic properties of two novel narrow band gap conjugated polyelectrolytes (NBGCPEs) based on a poly[2,6-(4,4-bis-alkyl-4H-cyclopenta[2,1-b;3,4-b’]dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)] donor/acceptor backbone. Comparison with the properties of the neutral precursor material shows that the ionic component in these cationic NBGCPEs leads to a red-shift in the absorption spectra and to a modification of the polymer electronic energy levels. Both the HOMO and the LUMO are lowered in energy, with the net effect being dependent on the choice of counterion, i.e. bromide vs. tetrakis(1-imidazolyl)borate. Moreover, we unexpectedly find n-type transport in thin-film transistors, as opposed to the widely studied p-type transport in neutral systems with isoelectronic backbones. From these observations we conclude that introduction of ionic functionalities adjacent to semiconducting polymers that exhibit charge-transfer excitations offers unique opportunities for materials design.
Journal of the American Chemical Society published new progress about 1426829-76-6. 1426829-76-6 belongs to benzothiophene, auxiliary class Other Aromatic Heterocyclic,Bromide, name is 2,6-Dibromo-4,4-bis(6-bromohexyl)-4H-cyclopenta[1,2-b:5,4-b’]dithiophene, and the molecular formula is C21H26Br4S2, COA of Formula: C21H26Br4S2.
Referemce:
https://en.wikipedia.org/wiki/Benzothiophene,
Benzothiophene | C8H6S – PubChem