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Updated: Jul 8, 2025

A Simple and Efficient Protocol for the Catalytic Insertion Polymerization of Functional Norbornenes
Published on: February 27, 2017
3D-Printed Cyclodextrin Polymer Encapsulated Wells-Dawson: A Novel Catalyst for Knoevenagel Condensation Reactions
Samahe Sadjadi1,2, Amir Masood Rezadoust3, Soheila Yaghoubi4
1Gas Conversion Department, Faculty of Petrochemicals, Iran Polymer and Petrochemical Institute, PO Box 14975-112, Tehran 1497713-115, Iran.
Abstract:
In the pursuit of enhancing the catalytic potential of the Wells-Dawson (WD) polyoxometalate (POM) while addressing its solubility challenges, this study focuses on devising a sustainable catalyst that operates effectively in aqueous environments. Leveraging cyclodextrin (CD) polymer chemistry in conjunction with 3D printing technology, a CD nanosponge, recognized for its interaction with POMs and molecular shuttle attributes, is synthesized as a scaffold for WD immobilization. Through integration into a 3D-printed monolith framework, the supported WD species becomes embedded within the catalyst structure, facilitating its application. Extensive characterization encompassing X-ray diffraction, thermogravimetric analysis, Fourier transform infrared, scanning electron microscopy/energy-dispersive system, elemental mapping analysis, and compression testing confirms the structural integrity and viability of the resulting catalyst. The catalytic assessment of the developed catalyst in the Knoevenagel condensation reaction within aqueous settings demonstrates enhanced reusability attributed to the encapsulation within the 3D matrix. Notably, a hot filtration test provides empirical evidence of heterogeneous catalysis mode, further underpinning the catalyst's performance and potential for sustainable applications.
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