01909nas a2200217   4500008004100000022001400041245009100055210006900146260005700215300001200272490000800284520113100292653002601423653000801449653001101457653004201468653002801510100001401538700001701552856012201569       2009                        eng d  a1011-372X00aSelective oxidation of benzyl alcohol over copper phthalocyanine immobilized on MCM-410 aSelective oxidation of benzyl alcohol over copper phthalocyanine  a233 SPRING ST, NEW YORK, NY 10013 USAbSPRINGERcMAR  a434-4420 v1283 a<p>Copper phthalocyanine (CuPc) complexes immobilized on ``neat'' and Ti(4+) and Al(3+) containing MCM-41 mimic the functionality of metalloenzymes. These novel materials catalyze the oxidation of benzyl alcohol to selectively benzaldehyde at moderate temperatures using peroxides and molecular oxygen as oxidant. Electron paramagnetic resonance and X-ray photoelectron spectroscopic studies revealed that the acidity of the support (MCM-41) influences the electronic structure of the immobilized CuPc. On acidic supports a part of copper in CuPc got reduced from a ``formal'' +2 to +1 oxidation state. This reduction of copper in its oxidation state on different supports decreased in the order: Al-MCM-41 (Bronsted and strong Lewis acid sites) &gt; MCM-41 (silanol sites) &gt; Ti-MCM-41 (weak Lewis acid sites). A linear variation in catalytic activity with the concentration of Cu(1+) ions in different catalyst samples was observed. The study reveals that by suitably modifying the acidic properties of the support one can, in principle, fine-tune the electronic and catalytic properties of the active oxidation sites.</p>10aCopper phthalocyanine10aEPR10aMCM-4110aSelective oxidation of benzyl alcohol10aUV-visible spectroscopy1 aHamza, A.1 aSrinivas, D.  uhttps://library.ncl.res.in/content/selective-oxidation-benzyl-alcohol-over-copper-phthalocyanine-immobilized-mcm-41-0