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in a fume hood. To this cobalt solution 0.4 mol pyridine (99+%, ACROS Organics) was then addd, followed by 0.1 mol of ethylenediamine (99%, ACROS Organics). This mixture was then shaken thoroughly before 0.2 mol of salicylaldehyde (98%, ACROS Organics) was added to it. Red crystals formed immediately. This material was heated out of contact with air for 2 hours before cooling, filtering and washing with copious amounts of DI water. The material was then dried in an oven at 100 C. Synthesis of Co(fluomine). Co(fluomine) was prepared by dissolving 0.36 mmol of cobaltous acetate tetrahydrate in 600 μL DI water and heating to at least 70 C. Separately, 0.71 mmol of 3-fluorosaliclyaldehyde (3-FSA, 97%, Aldrich Chemicals) was dissolved in 600 μL EtOH (denatured, Aldrich Chemicals) by heating. To this solution 25 μL of ethylenediamine was added followed immediately by 105 μL of piperidine (99%, Aldrich Chemicals). The material formed a yellow-orange crystalline material that dissolved with heating. The cobalt solution was then added to this material and the resultant solution was heated out of contact with air for 1 hour. The resulting red crystalline material was then filtered, washed with copious amounts of DI water and dried in an oven at 100 C. Synthesis of Immobilized Complexes. Co(fluomine) was immobilized on three different substrates (as described earlier): LSX zeolite, mesoporous MCM-41, and ion- exchange resin (IXR). The ion-exchange resin was washed with methanol prior to proceeding to the ion-exchange. With each of the immobilized complexes, the first step of the synthesis was Co(II) ion-exchange with the desired substrate. This was done by conventional ion exchange where the substrate was added to a 2X equivalent solution of cobaltous acetate (0.08M) in an Erlenmeyer flask and heated to a mild boil. The solution 159PDF Image | PSA USING SUPERIOR ADSORBENTS
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