Synthesis and application of novel urea–benzoic acid functionalized magnetic nanoparticles for the synthesis of 2,3-disubstituted thiazolidin-4-ones and hexahydroquinolines
In situ synthesis of monodisperse luminescent terbium complex-silica nanocomposites
作者:Lehui Lu、Fengyi Liu、Guoying Sun、Hongjie Zhang、Shiquan Xi、Haishui Wang
DOI:10.1039/b405465b
日期:——
A facile strategy for the in situ synthesis of terbium complex-silica nanocomposites is described. The resultant spherical nanocomposites possess good monodispersity and exhibit luminescent properties of terbium complex.
A New Functionalized MCM-41 Mesoporous Material for Use in Environmental Applications
作者:José A. S. Costa、Anuska C. F. S. Garcia、Danilo O. Santos、Victor H. V. Sarmento、André L. M. Porto、Maria E. de Mesquita、Luciane P. C. Romão
DOI:10.5935/0103-5053.20130284
日期:——
This work describes the synthesis and characterization of a new mesoporous adsorbent consisting of MCM-41 functionalized with modified p-aminobenzoic acid (PABA-Si). The synthesis was performed by a hydrothermal/co-condensation method. The PABA-MCM-41 was characterized using FTIR, SAXS, N-2 adsorption/desorption, SEM, and TG. Batch experiments were employed to determine the effects of initial adsorbate concentration, contact time, and temperature. The adsorption of benzo[a] pyrene (B[a]P) reached equilibrium after ca. 90 min (q(e) = 27.2 mu g g(-1)), and higher adsorbate concentrations were associated with increases in both the percentage removal (71.0-95.7%) and the value of q(e) (20.1-27.1 mu g g(-1)). The adsorption followed pseudo-second order kinetics, and was fitted using the Langmuir isotherm model. At higher temperatures, there were increases in the initial rate of adsorption and the kinetic constant. The thermodynamic parameters indicated that the process was spontaneous, endothermic, and with a tendency to disorder.
Synthesis and application of novel urea–benzoic acid functionalized magnetic nanoparticles for the synthesis of 2,3-disubstituted thiazolidin-4-ones and hexahydroquinolines
作者:Fazlulhaq Fazl、Morteza Torabi、Meysam Yarie、Mohammad Ali Zolfigol
DOI:10.1039/d2ra02205b
日期:——
Preparation of hexahydroquinolines and 2,3-disubstituted thiazolidin-4-ones by using Fe3O4@SiO@(CH2)3–urea–benzoic acid as a catalyst.