01888nas a2200229   4500008004100000022001400041245007900055210006900134260011700203300001000320490000800330520101800338653003201356653001601388653001401404653003301418653002501451653003601476100001901512700001701531856011001548       2009                        eng d  a0920-586100aRedox and selective oxidation properties of Mn complexes grafted on SBA-150 aRedox and selective oxidation properties of Mn complexes grafted  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbCatalysis Soc India; Petrotech Soc; Indo US Sci & Technol ForumcMAR  a66-710 v1413 a<p>Manganese complexes of 5,10,15,20-tetraphenylporphyrin (Mn(TPP)Cl) were grafted on SBA-15 functionalized with propyl-amine, -thiol and -sulfonic acid groups. The acido-basic properties of the support influenced the oxidation state, redox behavior and selective oxidation properties of the Mn complexes. Acidic supports (SBA-15-pr-SH and SBA-15-pr-SO(3)H) promoted the reduction of Mn ions in Mn-TPP complexes from 3+ to 2+ oxidation state. A similar behavior was found also when Mn(Salen)Cl complexes were immobilized on those supports. However, the extent of such facile reduction was more in the case of Mn-TPP than in Mn-Salen complexes. The former exhibited superior catalytic activity (turnover frequency) than the latter-type Mn complexes in regio-, stereo- and chemoselective oxidation of R-(+)-limonene with molecular oxygen (1 atm) at ambient temperatures. The catalytic oxidation activity correlates with the redox behavior of the grafted Mn complexes. (c) 2008 Elsevier B.V. All rights reserved.</p>10aGrafted manganese complexes10aMn(Salen)Cl10aMn(TPP)Cl10aOrgano-functionalized SBA-1510aRedox behavior of Mn10aSelective oxidation of limonene1 aSaikia, Lakshi1 aSrinivas, D.  uhttps://library.ncl.res.in/content/redox-and-selective-oxidation-properties-mn-complexes-grafted-sba-15-0