Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 8, Pages 5869-5876Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am500766a
Keywords
ordered mesoporous carbon; cobalt phthalocyanine; bioinspired catalysis; hydrogen peroxide activation
Funding
- National Natural Science Foundation of China [51133006, 51103133]
- Zhejiang Provincial Natural Science Foundation of China [Y14E030044, Y14E030049]
- Textile Vision Science Education Fund
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The chemistry of enzymes presents a key to understanding the catalysis in the world. In the pursuit of controllable catalytic oxidation, researchers make extensive efforts to discover and develop functional materials that exhibit various properties intrinsic to enzymes. Here we describe a bioinspired catalytic system using ordered-mesoporous-carbon (OMC)-bonded cobalt tetraaminophthalocyanine (CoTAPc-OMC) as a catalyst that could mimic the space environment and reactive processes of metalloporphyrin-based heme enzymes and employing linear dodecylbenzenesulfonate as the fifth ligands to control the activation of H2O2 toward the peroxidase-like oxidation. The generation of nonselective free hydroxyl radicals was obviously inhibited. In addition, functional modification of OMC has been achieved by a moderate method, which can reduce excessive damage structure of OMC. Because of its favorable and tunable pore texture, CoTAPc-OMC provides a suitable interface and environment for the accessibility and oxidation of C.I. Acid Red 1, the model compound, and exhibits significantly enhanced catalytic activity and sufficient stability for H2O2 activation. The high-valent cobalt oxo intermediates with high oxidizing ability have been predicted as the acceptable active species, which have been corroborated by the results from the semiempirical quantum-chemical PM6 calculations.
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