Journal
NEW JOURNAL OF CHEMISTRY
Volume 35, Issue 9, Pages 1861-1866Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1nj20030e
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Funding
- National Natural Science Foundation of China [50943048]
- Shanghai Government [11YZ88, S30406, 07dz22303, 10PJ1408200, ssd10014]
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Urea-functionalized mesoporous polymers (urea-MPs) were synthesized through the surfactant-directed urea-phenol-formaldehyde oligomers self-assembly approach. The as-prepared urea-MPs material exhibited superior catalytic activity than parent urea in water-medium Knoevenagel condensation reactions and could be used repetitively for seven times. The excellent activity could be attributed to the synergic effect derived from the secondary amine with the surface phenolic groups in the mesoporous support, which generated the acid-base cooperative catalytic behavior. Meanwhile, the urea functional groups embedded in the mesopore wall could inhibit the leaching of active species and thus resulted in the relatively good durability.
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