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Information Seminar Paper

Title

ANCHORING OF RUTHENIUM ONTO SURFACE OF POROUS METAL−ORGANIC FRAMEWORK THROUGH POST-SYNTHESIS MODIFICATION AND STUDIES ON ITS CATALYTIC ACTIVITY UNDER HETEROGENEOUS CONDITION

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Abstract

 NOWADAYS, METAL–ORGANIC FRAMEWORKS (MOFS) REPRESENT A NEW CLASS OF HYBRID NANOPOROUS MATERIALS. MOFS ARE SYNTHESIZED UNDER MILD CONDITIONS AND EXHIBIT TUNABLE PORE SIZE, PORE VOLUME, AND HIGH SURFACE AREA, COMPARED WITH TRADITIONAL POROUS CARBONS AND INORGANIC ZEOLITES. THE POTENTIAL APPLICATIONS OF POROUS MOFS COVER A BROAD RANGE OF FIELDS INVOLVING THE WORLD‘S MOST PRESSING ENVIRONMENTAL PROBLEMS [1].AN ECOFRIENDLY SOLID CATALYST HAS BEEN SYNTHESIZED BY ANCHORING RUTHENIUM COMPLEXES INTO POST SYNTHETICALLY MODIFIED METAL ORGANIC FRAMEWORK IRMOF-3. THE PORE OF IRMOF-3 WAS FIRST MODIFIED WITH PYRIDINE-2-ALDEHYDE. THE AMINE GROUP OF IRMOF-3 UPON CONDENSATION WITH PYRIDINE-2-ALDEHYDE AFFORDED A BIDENTATE SCHIFF BASE MOIETY IN THE POROUS MATRIX [2]. THE SCHIFF BASE MOIETIES WERE USED TO ANCHOR RUTHENIUM IONS (FIG. 1). THE PREPARED CATALYST HAS BEEN CHARACTERIZED BY FTIR, ICP-AES SPECTROSCOPY AND X-RAY POWDER DIFFRACTION. FRAMEWORK STRUCTURE OF THE CATALYST IS NOT BEING DESTROYED IN THE MULTISTEP SYNTHESIS PROCEDURE AS EVIDENCED IN X-RAY POWDER DIFFRACTION STUDIES. THE CATALYST HAS SHOWN HIGH ACTIVITY TOWARD ALLYLIC OXIDATION OF CYCLIC ALKENES IS OF CONSIDERABLE VALUE FOR THE PRODUCTION OF A,B-UNSATURATED ALCOHOLS AND KETONES, WHICH ARE KEY INTERMEDIATES IN THE MANUFACTURE OF FINE CHEMICALS [3]. ONE CAN SEE THAT THIS SOLID CATALYST DEMONSTRATED HIGH CATALYTIC ACTIVITY AND PRODUCT SELECTIVITIES IN THE OXIDATION OF A RANGE OF ALKENES (CYCLOHEXENE) TO THE CORRESPONDING A,B-ENONES (2-CYCLOHEXEN-1-ONE) AT 50◦C, 10 H. THE IMMOBILIZED COMPLEX DID NOT LEACH OR DECOMPOSE DURING THE CATALYTIC REACTIONS, SHOWING PRACTICAL ADVANTAGES OVER THE HOMOGENEOUS CATALYSIS.

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