A Convenient Synthesis of 3-Alkylthiophenes

Study on stability of poly(3-hexylthiophene)/titanium dioxide composites as a visible light photocatalyst

“…3-hexylthiophene (3-HT) monomer was synthesized by coupling n-hexylmagnesium bromide with 3-bromothiophene in the presence of nickel catalyst [29]. P3HT was synthesized by a typical chemical oxidative in CHCl 3 .…”

Synthesis and Mesomorphic Behavior of 3‐Alkyl‐2,5‐ bis[p‐(hexa‐2,4‐dienoyloxy)phenyl]‐Thiophene Derivatives

“…Kumada coupling reaction 7,8 between 3-bromo thiophene and Grignard reagent of alkyl bromide resulted in 3-alkylthiophene 2 n , which was brominated with NBS, 9 and the obtained 2,5-dibromo-3-alkyl thiophene 3 n was coupled with 4-methoxyphenylboric acid 4 under a standard Suzuki condition. 10 Worth to be noted is that, the yield of Suzuki reaction between 2,5-dibromothiophene and 4-methoxyphenylboric acid was usually…”

“…2,5-Dibromo-3-alkylthiophene 3 n : All 2,5-dibromo-3-alkylthiophene derivatives were prepared according to a modified procedure of Zimmer et al 8 At 0-5 ℃ under an argon atmosphere, NBS powder (28 mmol) was added slowly to a stirred solution of 3-alkylthiophene (13.1 mmol) dissolved in a 1∶1 mixture of chloroform (15 mL) and DMF (15 mL). The mixture was stirred overnight at room temperature and then quenched with water, the organic layer was separated, and the water layer was extracted with chloroform (10 mL×3).…”

“…n : All 3-alkylthiophene compounds were prepared by a modified literature procedure of Kumada outlined by Zimmer et al 8 Magnesium turnings (0.85 g, 35 mmol) were covered by dry THF (35 mL) and alkylbromide (0.32 mmol) was added. After the reaction had started, the remaining alkylbromide (31.7 mmol) dissolved in dry THF (10 mL) was added dropweise, maintaining the Grignard solution under reflux.…”

Life cycle analysis of organic photovoltaic technologies

“…Before the polymerization the initial monomer 3-hexylthiophene (3HT) must be activated to 2,5-dibromo-3-hexylthiophene [44][45][46]. 3HT is derived from 3-bromothiophene (a brominated thiophene) and bromohexane [47].…”