A novel hybrid acenaphthene-hemicyanine dye（Acc） was designed and synthesized as a colorimetric and ratiometric fluorescent sensor for cyanide detection. The nucleophilic addition of cyanide anion resulted in the bl...A novel hybrid acenaphthene-hemicyanine dye（Acc） was designed and synthesized as a colorimetric and ratiometric fluorescent sensor for cyanide detection. The nucleophilic addition of cyanide anion resulted in the blocking of the intramolecular charge transfer（ICT）. Thus, the sensor exhibited high sensitivity and selectivity to- wards cyanide anion among many anions in dimethylsulphoxide（DMSO）-water media, with the emission wavelength displaying a very large shift（186 nm）. Moreover, the color changes of the solution could be observed by the naked eyes and it had a short response time. Under optimized conditions, the detection limit for cyanide was calculated to be 1.3μmol/L（R2=0.9958）. In addition, the probe had excellent biocompatibility and could be utilized to monitor cyanide in living cells.展开更多
Twenty novel podophyllotoxin derivatives（1-20） were designed and synthesized. The anti-proliferation activities of these compounds were evaluated against three human cancer cell lines（HepG2, Calu-1 and MCF-7） usin...Twenty novel podophyllotoxin derivatives（1-20） were designed and synthesized. The anti-proliferation activities of these compounds were evaluated against three human cancer cell lines（HepG2, Calu-1 and MCF-7） using podophyllotoxin and Combretastatin A4（CA-4） as positive controls. Among all the compounds, compound 2 displayed more significant anti-proliferation activities against MCF-7 and Calu-1 cell lines and showed lower toxicity towards non-cancer cells. Furthermore, the cell cycle and apoptosis analysis results revealed that compound 2 can cause cell arrest at G2/M phase, leading to cancer cell apoptosis. Meanwhile, it can also reduce the adhesive ability of Calu-1 cells to fibronectin and laminin. The docking simulation results demonstrated that compound 10 can nicely bind to the colchicine site of tubulin. The podophyllotoxin derivatives are worthy to be further investigated to obtain more potent anti-cancer drugs.展开更多
文摘A novel hybrid acenaphthene-hemicyanine dye（Acc） was designed and synthesized as a colorimetric and ratiometric fluorescent sensor for cyanide detection. The nucleophilic addition of cyanide anion resulted in the blocking of the intramolecular charge transfer（ICT）. Thus, the sensor exhibited high sensitivity and selectivity to- wards cyanide anion among many anions in dimethylsulphoxide（DMSO）-water media, with the emission wavelength displaying a very large shift（186 nm）. Moreover, the color changes of the solution could be observed by the naked eyes and it had a short response time. Under optimized conditions, the detection limit for cyanide was calculated to be 1.3μmol/L（R2=0.9958）. In addition, the probe had excellent biocompatibility and could be utilized to monitor cyanide in living cells.
基金Supported by the National Natural Science Foundation of China（No.21376112）, the Natural Science Foundation of the Col- leges and Universities in Jiangsu Province, China（No.13KJB350002） and the Natural Science Foundation of the Colleges and Universities Maj or Project in Jiangsu Province, ChinafNo. 15KJA350001）.
文摘Twenty novel podophyllotoxin derivatives（1-20） were designed and synthesized. The anti-proliferation activities of these compounds were evaluated against three human cancer cell lines（HepG2, Calu-1 and MCF-7） using podophyllotoxin and Combretastatin A4（CA-4） as positive controls. Among all the compounds, compound 2 displayed more significant anti-proliferation activities against MCF-7 and Calu-1 cell lines and showed lower toxicity towards non-cancer cells. Furthermore, the cell cycle and apoptosis analysis results revealed that compound 2 can cause cell arrest at G2/M phase, leading to cancer cell apoptosis. Meanwhile, it can also reduce the adhesive ability of Calu-1 cells to fibronectin and laminin. The docking simulation results demonstrated that compound 10 can nicely bind to the colchicine site of tubulin. The podophyllotoxin derivatives are worthy to be further investigated to obtain more potent anti-cancer drugs.
