Porphyrin based porous organic polymer as bi-functional catalyst for selective oxidation and Knoevenagel condensation reactions

Authors:  Arindam Modak, John Mondal, Asim Bhaumik

Abstract:
Porphyrin based microporous organic polymer Fe-POP-1 has been synthesized through a facile solvothermal method involving extended aromatic substitution of pyrrole and terephthaldehyde in the presence of Fe(III). This material has very high BET surface area and exhibits two types of catalytic sites: iron-free porphyrin moieties for base catalysis as well as Fe(III)-bound sites for slective oxidation reactions. Due to the presence of basic porphyrin macrocyclic site in Fe-POP-1, it catalyzes Knoevenagel condensation of aromatic aldehydes with malononitrile at room temperature, whereas the Fe(III)-bound site catalyzes selective oxidation of alcohols to the respective aldehyde/ketones in the presence of tert-butyl hydroperoxide (TBHP) as oxidant. Good reusability and excellent selectivity makes this Fe-POP-1 as a promising and efficient bi-functional heterogeneous catalyst for the production of organic fine chemicals through the environmentally benign liquid phase catalytic reactions.

Keywords:
Fe-porphyrin
Base catalysis
Bi-functional catalysis
Knoevenagel condensation
Porous organic polymer
Liquid phase selective oxidation

Published in: Applied catalysis A: General  (Volume 459, Pages 1-130, 24 May 2013)

Publisher: Elsevier

ISSN Information: 0926-860X

Porphyrin based porous organic polymer as bi-functional catalyst for selective oxidation and Knoevenagel condensation reactions

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