Time filter

Source Type

Khazaei A.,Bu - Ali Sina University | Soltani Rad M.N.,Shiraz University of Technology | Kiani Borazjani M.,Bu - Ali Sina University | Saednia S.,Bu - Ali Sina University | And 2 more authors.
Synlett | Year: 2011

Sidewall functionalization of single-walled carbon nanotubes (SWCNTs) by the covalent addition of 4-benzo-9-crown-3 ether diazonium salt has been described. The covalent grafting of crown ether has led to a considerable increase in the solubility of SWCNTs in both organic and aquatic solvents such as ethanol, di-methyl sulfoxide, dimethylformamide and water. The highest solubility was attained in DMF and DMSO. The covalently bonded 4-benzo-9-crown-3 ether allowed the hosting of Li +. The covalent grafting of crown ether [4-(benzo-9-crown-3)] to SWCNT was identified and confirmed by infrared spectroscopy, transmission electron microscopy, UV/Vis and thermogravimetric analysis methods. © Georg Thieme Verlag Stuttgart · New York. Source

Khazaei A.,Bu - Ali Sina University | Rad M.N.S.,Shiraz University of Technology | Borazjani M.K.,Bu - Ali Sina University | Moradian K.M.,Bu - Ali Sina University | And 2 more authors.
South African Journal of Chemistry | Year: 2011

A highly efficient procedure for the synthesis of triarylmethane and diarylmethane via benzylation of aromatic hydrocarbons from benzyl alcohols using supported P 2O 5 on SiO 2 and/or Al 2O 3 under solvent-free conditions is described. Excellent yields of triarylmethane and diarylmethane were obtained using P 2O 5-SiO 2 (50%W/W) and/or P 2O 5-Al 2O 3 (50%W/W) at room temperature. The reusability of both supported P 2O 5 on SiO 2 and Al 2O 3 were examined. Both supported reagents show favorable activities in first and second runs, however, a decline in reactivity was observed in following attempts. The reaction is scalable to > 0.03 mole amounts. Source

Discover hidden collaborations