General Description
2-Mercapto-5-nitrobenzimidazole (MNB) is a charge transfer molecule and its influence on SiO
2 and Au electrode on pentacene organic thin film transistors has been investigated. The treatment of the Au electrodes of an organic bottom-contact thin film transistor with MNB, improves the current-voltage characteristics.
Synthesis
GENERAL METHOD: 4-Nitro-o-phenylenediamine (0.019 mol) and water (3 mL) were sequentially added to a mixed solution containing sodium hydroxide (0.022 mol), methanol (20 mL) and carbon disulfide (0.022 mol). The reaction mixture was heated to reflux for 3 hours. Subsequently, activated carbon was added cautiously and reflux was continued for 10 minutes before the activated carbon was removed by thermal filtration. The filtrate was heated to 60-70 °C and the reaction was quenched with water (20 mL) preheated to 70 °C, followed by the slow addition of 50% acetic acid solution (9 mL) under vigorous stirring. The reaction solution was cooled in a refrigerator for 3 h to promote crystallization, and the target product 2-mercapto-5-nitrobenzimidazole was finally isolated.
References
[1] European Journal of Medicinal Chemistry, 2013, vol. 63, p. 696 - 701
[2] Bioorganic and Medicinal Chemistry, 2015, vol. 23, # 19, p. 6317 - 6326
[3] ACS Combinatorial Science, 2017, vol. 19, # 12, p. 738 - 747
[4] Journal of the Indian Chemical Society, 1984, vol. 61, # 1, p. 89 - 91
[5] Bioorganic and Medicinal Chemistry, 2005, vol. 13, # 19, p. 5550 - 5559
