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

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

“…Functionalized organic or inorganic polymer supported ligand, metal complexes and their applications are one of the most studying and interesting subject for the scientists [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43]. In the literature, there are a lot of solid supported ruthenium, iron, tungsten, manganese, cupper, cobalt, molybdenum and nickel complexes having different oxidation state [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43].…”

“…External calibrations were drawn by the instrument software with the obtained data for each substrate and products. Preparation of Silica-Supported 3-Aminopropyltriethoxysilane (SiO 2 -APTES) and bis(diazoimine) ligands were synthesized according to our previous study [25,26]. The catalytic oxidations of cyclohexane, cyclohexene, cyclooctane and ctyrene under microwave irradiation were performed as follows: 100 mg synthesized complex, 2 mmol substrate, 4 mmol H 2 O 2 (Merck, 35%) were suspended in 5 mL acetonitrile in QV-50S quartz vessels and microwaved for 60 min at 100°C with power controlled instrument set to max.…”

“…SiO 2 -APTES-anchored bis(diazoimine) ligands were synthesized from the silicasupported bis(diazocarbonyl) compounds according to previous our reported studies [25][26]. (Fig.…”

“…Metal ions diffuse through the SiO 2 channels, and react with the ligands. Importantly, well dispersed silica-supported Cu(II) and Ni(II) complexes showed a good catalytic activity as a result of having a huge surface on the silica particles and its cavities as an internal and external surface as seen in Fig 3. [ 6,9,[12][13]15,[25][26][27]. EDX results showed that the metal ions were supported on the silica-supported ligands given in Fig 4. …”

“…This situation can affect the oxidation mechanism. Subsequently, microwave power decreases the reaction time and increases selectivity [12,13,22,[24][25][26][27]. Hence, it can be speculated that microwave power is very usable, easy and clean for organic and inorganic syntheses.…”