Vapor-phase selective aerobic oxidation of benzylamine to dibenzylimine over silica-supported vanadium-substituted tungstophosphoric acid catalyst
Silica-supported vanadium-substituted tungstophosphoric acid (TPAV x , x = 0-3) catalysts were prepared by an impregnation method and their physico-chemical properties derived from different spectroscopic techniques. The characterization results confirmed the incorporation of vanadium into the frame...
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| Veröffentlicht in: | Green chemistry : an international journal and green chemistry resource : GC 2013-01, Vol.15 (3), p.837-846 |
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| container_title | Green chemistry : an international journal and green chemistry resource : GC |
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| creator | Venkateswara Rao, K. T Haribabu, B Sai Prasad, P. S Lingaiah, N |
| description | Silica-supported vanadium-substituted tungstophosphoric acid (TPAV
x
,
x
= 0-3) catalysts were prepared by an impregnation method and their physico-chemical properties derived from different spectroscopic techniques. The characterization results confirmed the incorporation of vanadium into the framework of heteropoly tungstate anion and the Keggin structure remained intact on SiO
2
. Vapor-phase aerobic oxidation of benzylamine was evaluated over these catalysts and dibenzylimine was obtained as the selective oxidative condensation product. Under optimized reaction conditions, 90% conversion of benzylamine with 95% selectivity to dibenzylimine was achieved over 20 wt% TPAV
1
/SiO
2
catalyst. The catalyst showed constant activity, after an initial decrease by about 10%, during the time on stream analysis. Controllable acidity and redox properties of the catalyst were accountable for high catalytic activity and selectivity. A plausible reaction mechanism is also elucidated.
Silica-supported vanadium-substituted heteropoly tungstate is developed as a highly efficient heterogeneous catalyst for the vapor-phase selective aerobic oxidation of benzylamine to dibenzylimine. |
| doi_str_mv | 10.1039/c3gc36735e |
| format | Article |
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x
,
x
= 0-3) catalysts were prepared by an impregnation method and their physico-chemical properties derived from different spectroscopic techniques. The characterization results confirmed the incorporation of vanadium into the framework of heteropoly tungstate anion and the Keggin structure remained intact on SiO
2
. Vapor-phase aerobic oxidation of benzylamine was evaluated over these catalysts and dibenzylimine was obtained as the selective oxidative condensation product. Under optimized reaction conditions, 90% conversion of benzylamine with 95% selectivity to dibenzylimine was achieved over 20 wt% TPAV
1
/SiO
2
catalyst. The catalyst showed constant activity, after an initial decrease by about 10%, during the time on stream analysis. Controllable acidity and redox properties of the catalyst were accountable for high catalytic activity and selectivity. A plausible reaction mechanism is also elucidated.
Silica-supported vanadium-substituted heteropoly tungstate is developed as a highly efficient heterogeneous catalyst for the vapor-phase selective aerobic oxidation of benzylamine to dibenzylimine.</description><identifier>ISSN: 1463-9262</identifier><identifier>EISSN: 1463-9270</identifier><identifier>DOI: 10.1039/c3gc36735e</identifier><language>eng</language><publisher>Cambridge: Royal Society of Chemistry</publisher><subject>Catalysis ; Chemistry ; Exact sciences and technology ; General and physical chemistry ; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</subject><ispartof>Green chemistry : an international journal and green chemistry resource : GC, 2013-01, Vol.15 (3), p.837-846</ispartof><rights>2014 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c408t-d4573136f9005a4bd8d48cd7dffaacf838c812e2776e8a2577eef283a68ba1a13</citedby><cites>FETCH-LOGICAL-c408t-d4573136f9005a4bd8d48cd7dffaacf838c812e2776e8a2577eef283a68ba1a13</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=27105069$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Venkateswara Rao, K. T</creatorcontrib><creatorcontrib>Haribabu, B</creatorcontrib><creatorcontrib>Sai Prasad, P. S</creatorcontrib><creatorcontrib>Lingaiah, N</creatorcontrib><title>Vapor-phase selective aerobic oxidation of benzylamine to dibenzylimine over silica-supported vanadium-substituted tungstophosphoric acid catalyst</title><title>Green chemistry : an international journal and green chemistry resource : GC</title><description>Silica-supported vanadium-substituted tungstophosphoric acid (TPAV
x
,
x
= 0-3) catalysts were prepared by an impregnation method and their physico-chemical properties derived from different spectroscopic techniques. The characterization results confirmed the incorporation of vanadium into the framework of heteropoly tungstate anion and the Keggin structure remained intact on SiO
2
. Vapor-phase aerobic oxidation of benzylamine was evaluated over these catalysts and dibenzylimine was obtained as the selective oxidative condensation product. Under optimized reaction conditions, 90% conversion of benzylamine with 95% selectivity to dibenzylimine was achieved over 20 wt% TPAV
1
/SiO
2
catalyst. The catalyst showed constant activity, after an initial decrease by about 10%, during the time on stream analysis. Controllable acidity and redox properties of the catalyst were accountable for high catalytic activity and selectivity. A plausible reaction mechanism is also elucidated.
Silica-supported vanadium-substituted heteropoly tungstate is developed as a highly efficient heterogeneous catalyst for the vapor-phase selective aerobic oxidation of benzylamine to dibenzylimine.</description><subject>Catalysis</subject><subject>Chemistry</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</subject><issn>1463-9262</issn><issn>1463-9270</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNp9kMFLHTEQxpdioWq99C6kB6EIa5PNbpJ3lEfVguDFel1mk4lG9m22mezD1z-jf7FrnzzpxcMww_f95huYovgi-JngcvHdynsrlZYNfij2Ra1kuag039vNqvpUHBA9ci6EVvV-8fcOxpjK8QEIGWGPNoc1MsAUu2BZfAoOcogDi551OPzZ9LAKA7IcmQtbIfwT4hoTo9AHCyVN4xya0bE1DODCtJqljnLI04uYp-GechwfIs2V5jNgg2MWMvQbyp-Ljx56wqPXflj8uvhxu7wqr28ufy7Pr0tbc5NLVzdaCqn8gvMG6s4ZVxvrtPMewHojjTWiwkprhQaqRmtEXxkJynQgQMjD4ts2d0zx94SU21Ugi30PA8aJWiFFo6pGiXpGT7eoTZEooW_HFFaQNq3g7cvj27fHz_DJay6Qhd4nGGyg3UalBW-4Wszc8ZZLZHfufzlf3_Pb0Xn5DP7Dnfk</recordid><startdate>20130101</startdate><enddate>20130101</enddate><creator>Venkateswara Rao, K. T</creator><creator>Haribabu, B</creator><creator>Sai Prasad, P. S</creator><creator>Lingaiah, N</creator><general>Royal Society of Chemistry</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>7U6</scope><scope>C1K</scope></search><sort><creationdate>20130101</creationdate><title>Vapor-phase selective aerobic oxidation of benzylamine to dibenzylimine over silica-supported vanadium-substituted tungstophosphoric acid catalyst</title><author>Venkateswara Rao, K. T ; Haribabu, B ; Sai Prasad, P. S ; Lingaiah, N</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c408t-d4573136f9005a4bd8d48cd7dffaacf838c812e2776e8a2577eef283a68ba1a13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Catalysis</topic><topic>Chemistry</topic><topic>Exact sciences and technology</topic><topic>General and physical chemistry</topic><topic>Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Venkateswara Rao, K. T</creatorcontrib><creatorcontrib>Haribabu, B</creatorcontrib><creatorcontrib>Sai Prasad, P. S</creatorcontrib><creatorcontrib>Lingaiah, N</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Sustainability Science Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><jtitle>Green chemistry : an international journal and green chemistry resource : GC</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Venkateswara Rao, K. T</au><au>Haribabu, B</au><au>Sai Prasad, P. S</au><au>Lingaiah, N</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Vapor-phase selective aerobic oxidation of benzylamine to dibenzylimine over silica-supported vanadium-substituted tungstophosphoric acid catalyst</atitle><jtitle>Green chemistry : an international journal and green chemistry resource : GC</jtitle><date>2013-01-01</date><risdate>2013</risdate><volume>15</volume><issue>3</issue><spage>837</spage><epage>846</epage><pages>837-846</pages><issn>1463-9262</issn><eissn>1463-9270</eissn><abstract>Silica-supported vanadium-substituted tungstophosphoric acid (TPAV
x
,
x
= 0-3) catalysts were prepared by an impregnation method and their physico-chemical properties derived from different spectroscopic techniques. The characterization results confirmed the incorporation of vanadium into the framework of heteropoly tungstate anion and the Keggin structure remained intact on SiO
2
. Vapor-phase aerobic oxidation of benzylamine was evaluated over these catalysts and dibenzylimine was obtained as the selective oxidative condensation product. Under optimized reaction conditions, 90% conversion of benzylamine with 95% selectivity to dibenzylimine was achieved over 20 wt% TPAV
1
/SiO
2
catalyst. The catalyst showed constant activity, after an initial decrease by about 10%, during the time on stream analysis. Controllable acidity and redox properties of the catalyst were accountable for high catalytic activity and selectivity. A plausible reaction mechanism is also elucidated.
Silica-supported vanadium-substituted heteropoly tungstate is developed as a highly efficient heterogeneous catalyst for the vapor-phase selective aerobic oxidation of benzylamine to dibenzylimine.</abstract><cop>Cambridge</cop><pub>Royal Society of Chemistry</pub><doi>10.1039/c3gc36735e</doi><tpages>1</tpages></addata></record> |
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| identifier | ISSN: 1463-9262 |
| ispartof | Green chemistry : an international journal and green chemistry resource : GC, 2013-01, Vol.15 (3), p.837-846 |
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| language | eng |
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| source | Royal Society Of Chemistry Journals 2008-; Alma/SFX Local Collection |
| subjects | Catalysis Chemistry Exact sciences and technology General and physical chemistry Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry |
| title | Vapor-phase selective aerobic oxidation of benzylamine to dibenzylimine over silica-supported vanadium-substituted tungstophosphoric acid catalyst |
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