SINCE THE DISCOVERY OF MCMS (MOBIL COMPOSITION OF MATTER) APPLICATION OF MESOPOROUS MATERIALS IN GENERAL AND MESOPOROUS SILICAS IN PARTICULAR, CONTINUES TO THRIVE. IN SPITE OF HIGH PROFILE OF THIS IMPORTANT CLASS OF COMPOUNDS, INCLUDING LARGE SURFACE AREA, UNIFORM PORE SIZE AND WELL DEFINED MORPHOLOGY, THEIR APPLICABILITY...

MESOPOROUS SILICA NANOPARTICLES SUCH AS, SBA-15 AND MCM-41 SILICAS, ARE SOLID MATERIALS WHICH ARE COMPRISED OF A HONEYCOMB-LIKE POROUS STRUCTURE WITH HUNDREDS OF EMPTY CHANNELS (MESOPORES) WHICH ARE ABLE TO ABSORB/ENCAPSULATE RELATIVELY LARGE AMOUNTS OF BIOACTIVE MOLECULES. THE UNIQUE PROPERTIES, SUCH AS HIGH SURFACE AREA, LARGE PORE VOLUME, TUNEABLE PORE SIZE, AND GOOD CHEMICAL AND THERMAL STABILITY, OF MESOPOROUS SILICA NANOPARTICLES MATERIALS MAKE THEM POTENTIALLY SUITABLE FOR VARIOUS CONTROLLED RELEASE APPLICATIONS.FOR THE SUSTAINABLE DEVELOPMENT AND STRUCTURAL TARGETED OF POROUS SILICA NANOPARTICLES DRUG DELIVERY SYSTEMS, SURFACE MODIFICATION OF SILICA NANOPARTICLES COATED WITH CHITOSAN POLYMER AND THEN BINDING FOLIC ACID TO THE POLYMER SURFACE AS TARGETED MATERIAL (INTERACTION BETWEEN AMINO GROUPS ON CHITOSAN CHAINS AND CARBOXYL GROUP’S FOLIC ACID). POROUS SILICA NANOPARTICLES PROPOSED AS HIGH AMOUNTS OF DRUG MOLECULES CARRIER WITHOUT ANY PROBLEMS WHEN DELIVERED TO TISSUE OR INTRACELLULAR ORGANELLES. IN THIS WORK, WE USED ANTICANCER DRUG AND POROUS SILICA NANOPARTICLES AS CARRIER IN ORDER TO INCREASE DRUG LOADING ABILITY AND USE IT FOR TARGET DELIVERY OF ANTICANCER DRUGS.FINALLY, THE POROUS SILICA MATERIAL WITH A FUNCTIONALIZED SURFACE HAS BEEN USED AS ANTICANCER DRUG CARRIER WHICH PROVIDES SEVERAL OUTSTANDING FEATURES THAT MAKE THEM GOOD CHOICES FOR SOLVING THE PROBLEMS OF THE CURRENT DRUG DELIVERY SYSTEM.

PLATINUM MESOPOROUS ALUMINOSILICATE NANOMATERIALS (PMAN) REPRESENTS THE SPECIFIC PROPERTIES AND STRUCTURES. INCORPORATION ALUMINIUM AND PLATINUM TO MESOPOROUS SILICA NANOSTRUCTURES CHANGES THE STRUCTURES AND PROPERTIES OF THE PURE MESOPOROUS SILICA. THIS STUDY INVESTIGATES THE SYNTHESIS OF PMAN WITH VARIOUS SI/AL MOLAR RATIOS OF 7, 10, 20 AND 50 AND THEIR CATALYTIC ACTIVITY FOR CUMENE HYDROCRACKING. THE MEASUREMENT OF SI/AL RATIO WAS CARRIED OUT BY USING XRF METHOD. A SURVEY OF GRAFTING AL FOUND THE GENERATION OF TETRAHEDRAL, PENTAHEDRAL AND OCTAHEDRAL AL ATOMS. THE AL-RICH SAMPLE OF PMAN-7 EXHIBITED 4-, 5- AND 6-COORDINATED ALUMINIUM STRUCTURES AND THE OTHER CATALYSTS SHOWED ONLY TETRAHEDRAL AND OCTAHEDRAL ALUMINIUM ATOMS. CUMENE CONVERSION REVEALED THAT THE CATALYTIC ACTIVITY DEPENDS ON THE ACIDITY STRENGTH DUE TO THE NUMBER OF LEWIS AND BRONSTED SITES. AN INCREASE IN CRACKING WAS OBSERVED FROM SI/AL OF 50 TO 10 AND A DECREASE IN PMAN-7 DUE TO THE PRESENCE OF PENTAHEDRAL AL AND/OR INACTIVE TETRAHEDRAL AL ATOMS. THE HIGH CONVERSION SHOWED THE IMPORTANT ROLE OF LEWIS ACID SITES IN THESE BIFUNCTIONAL CATALYSTS.

IN THIS WORK, NICKEL OXIDE NANOSTRUCTURE/ MESOPOROUS CARBON COMPOSITE WAS PREPARED BY ULTRASONIC ASSISTED METHOD. X-RAY DIFFRACTION (XRD), N2 ADSORPTION/DESORPTION ISOTHERMS, TRANSMISSION ELECTRON MICROSCOPY (TEM) AND FIELD EMISSION SCANNING ELECTRON MICROSCOPY (FESEM) ARE USED TO CHARACTERIZE THE COMPOSITE MORPHOLOGY. ELECTROCHEMICAL PROPERTIES OF THE SYNTHESIZED COMPOSITE AS ELECTRODES IN A SUPERCAPACITOR DEVICE WERE STUDIED USING CYCLIC VOLTAMMETRY (CV), GALVANOSTATIC CHARGE/DISCHARGE AND ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY IN KOH ELECTROLYTE SOLUTION. THE NANOCOMPOSITE SHOWS A PRONOUNCED HIGH SPECIFIC CAPACITANCE AND POWER DENSITY. ALSO THIS NEW SUPERCAPACITOR MATERIAL REVEAL VERY GOOD CYCLE STABILITY IN ADDITION TO VERY LOW ENERGY FADING. OUR RESULTS REPRESENTS NOVEL RESEARCH AND SIGNIFICANT ADVANCES IN THE FIELD OF ELECTRODE COMPOSITE MATERIALS FOR SUPERCAPACITOR.

THE ALDOL REACTION IS ONE OF THE MOST IMPORTANT CARBON - CARBON BOND-FORMING REACTIONS FOR THE PREPARATION OF SMALL OPTICALLY ACTIVE MOLECULES.INTERESTINGLY, ORGANIC MOLECULES CAN ALSO BE USED AS CATALYSTS FOR ORGANIC TRANSFORMATIONS WITHOUT ANY METALLIC SPECIES [1-2]. NATURALLY OCCURRING...

IN ORDER TO INVESTIGATE THE PHOTOPROTECTIVE BEHAVIOR OF THE SURFACTANT MOLECULES, THE AUTHOR EXAMINED THE PHOTODEGRADATION OF RHODAMINE 6G (R6G) AS A MODEL PRESENTED INTO BOTH SURFACTANT-FREE (ALMCM-41 (C)) AND SURFACTANT-CONTAINING (ALMCM-41(AS)), ALMCM-41 MATERIALS AND SUFFERING UV IRRADIATION. THE PHOTODEGRADATION OF THE R6G DYE INTO ALMCM-41 (AS) SAMPLES WAS MUCH SLOWER COMPARED THAT OF ALMCM-41 (C) SAMPLES. THE DIFFUSE REFLECTANCE SPECTROSCOPY DATA FOR R6G-ALMCM-41 (AS) AFTER UV IRRADIATION, CLEARLY DEMONSTRATE THAT R6G IS NOT DECOMPOSED. THIS SUGGESTS THAT THE PHOTOLYSIS OF SURFACTANT MOLECULE, CETYLTRIMETHYLAMMONIUM BROMIDE (CTAB), OCCURS PRIOR TO THAT OF R6G AND THAT CTAB WORKS AS A PHOTOPROTECTIVE MATERIAL. THE ACID EXTRACTION OF THE TEMPLATE WITH ETHANOL WAS PERFORMED FOR SAMPLE R6G-ALMCM-41 (AS). THE DIFFUSE REFLECTANCE SPECTRUM OF THE SURFACTANT-EXTRACTED SAMPLE DIDN’T SHOW ANY ABSORPTION BAND IN THE VISIBLE REGION. IT SHOWS THAT R6G MOLECULES MIGHT BE PRESENTED WITHIN THE SURFACTANT MICELLE OCCUPIED ALMCM-41 PORES.