Alkene epoxidation catalyzed by molybdenum supported on functionalized MCM-41 containing N–S chelating Schiff base ligand

Synthesis of novel NO type bis(diazoimine)–metal complexes supported on mesoporous silica: Microwave assisted catalytic oxidation of cyclohexane, cyclooctane, cyclohexene and styrene

“…The silica-supported Schiff base ligands do not allow 1:2 ratio for metal-ligand complexation (M:L) due to their a bulk structure. These predicted structures are in accordance with our previous studies and other literatures compared to FT-MIR/FAR spectral values, TGA, elemental analysis (C, H, N and M %) and other chemical or physical characterizations[5,[7][8][9][11][12][13][25][26][27].…”

“…Other new M-X (X: Cl -for Cu(II), Co(II) and Ni(II) complexes) stretches were at about 280 cm -1 in FAR spectra. [5,9,11,12,27]. (Table 1).…”

“…Schiff base ligands functionalized by the special gruops and their metal complexes have presently played a key role in catalytic synthesis of organic compounds due their improved chemical and physical properties [1][2][3][4][5]. Diazonium salts which are shown as R-N 2 + X -general formula (R: alkyl or aryl; X: inorganic or organic anion) can be obtained with the reaction of arylamines and nitrous acid at the temperature of 0-5 o C .…”

Highly effective solid phase extraction of some heavy metal ions using a cartridge filled with imprinted silica-supported N4O4 type bis(diazoimine) ligands

“…Even though many studies have been reported on the synthesis of mono(aryldiazonium) cations ArN þ 2 , synthesis of novel solid-supported bis(diazoimine) ligands and their solid phase extraction properties using syringe technique can be considered as a new area [6][7][8][9][10][11][12][13]. Silica-gel can be chemically activated with an active compound such as 3-aminopropyltriethoxysilane (APTES) before supporting chemicals to its surface [14][15][16][17][18].…”

Heterogeneous para-phenylamino sulfonic acid ligand functionalized on MCM-41 derived from rice husk ash: Selective mono-alkylated products of tert-butylation of phenol

“…In these few years, researchers have reported many attempts at tethering organic ligands onto mesoporous molecular sieves. Some related examples are Cyclam on SBA-15 for aerial oxidation of ethylbenzene [15], ltryptophane on MCM-41 as a drug carrier system [16], imidazolium derivatives on MCM-41 for conversion of CO 2 to cyclic carbonate [17], Schiff base thiopene-2-carbaldehye on MCM-41 applied in olefin epoxidation [18]. 3-Mercaptomethoxysilane supported onto SBA-15, Amberlyst 15 and Nafion, MCM-41 and MCM-48 were oxidized with H 2 O 2 to convert it into sulfonic acid groups.…”