NDLI: Phosphomolybdic acid dispersed in the micropores of sulfate treated Zr-pillared clay as efficient heterogeneous catalyst for the synthesis of β-aminocarbonyl compounds in aqueous media

Content Provider	Springer Nature Link
Author	Samantaray, Satish Sahoo, Sudhir Kumar Mishra, B. G.
Copyright Year	2010
Abstract	Zr-pillared clay (Zr-P) was synthesized by insertion of zirconium oxyhydroxy clusters into clay interlayer and subsequent thermal activation. The Zr-P materials were treated with sulfuric acid to graft sulfate ions onto the zirconia nanopolliars. The sulfate grafted Zr-Pillared clay (SZr-P) was used as support for phosphomolybdic acid (PMA/SZr-P). The synthesized materials were characterized by XRD, IR, UV–Vis, SEM and sorptometric techniques. The expansion of the clay lattice as a result of pillaring was confirmed from X-ray diffraction study. The interlayer space was found to be retained in the PMA/SZr-P material. All pillared clay materials show Type-I sorption isotherm typical of microporous materials. The IR spectra of the pillared clay materials show the presence of acidic and non-acidic hydroxyl groups. The structural integrity of the phosphomolybdic acid in the clay matrix was ascertained from the IR and UV-Vis spectroscopy. The PMA/SZr-P material was used as an efficient catalyst for the one pot synthesis of β-aminocarbonyl compounds by Mannich reaction in aqueous media. The multicomponent condensation of aryl aldehyde, amines and ketones using PMA/SZr-P material afforded a variety of β-aminocarbonyl compounds in excellent yield and purity under ambient conditions. The protocol developed in this investigation using the PMA/SZr-P material was found to be advantageous in terms of simple experimentation, preclusion of toxic solvents, recyclable catalyst and high yield and purity of the products.
Starting Page	573
Ending Page	580
Page Count	8
File Format	PDF
ISSN	13802224
Journal	Journal of Porous Materials
Volume Number	18
Issue Number	5
e-ISSN	15734854
Language	English
Publisher	Springer US
Publisher Date	2010-09-15
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Zr-pillared clay Phosphomolybdic acid β-Aminocarbonyl compounds Sulfate treatment Physical Chemistry Catalysis Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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