Volume 62, Issue 35 e202305186
Research Article

A Supported Catalyst that Enables the Synthesis of Colorless CO2-Polyols with Ultra-Low Molecular Weight

Qingxian Kuang

Qingxian Kuang

Key Laboratory of Polymer Ecomaterial, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 China

University of Science and Technology of China, Hefei, 230026 China

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Ruoyu Zhang

Ruoyu Zhang

Key Laboratory of Polymer Ecomaterial, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 China

University of Science and Technology of China, Hefei, 230026 China

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Zhenzhen Zhou

Zhenzhen Zhou

Key Laboratory of Polymer Ecomaterial, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 China

University of Science and Technology of China, Hefei, 230026 China

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Can Liao

Can Liao

Key Laboratory of Polymer Ecomaterial, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 China

University of Science and Technology of China, Hefei, 230026 China

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Prof. Dr. Shunjie Liu

Corresponding Author

Prof. Dr. Shunjie Liu

Key Laboratory of Polymer Ecomaterial, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 China

University of Science and Technology of China, Hefei, 230026 China

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Prof. Dr. Xuesi Chen

Prof. Dr. Xuesi Chen

Key Laboratory of Polymer Ecomaterial, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 China

University of Science and Technology of China, Hefei, 230026 China

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Prof. Dr. Xianhong Wang

Corresponding Author

Prof. Dr. Xianhong Wang

Key Laboratory of Polymer Ecomaterial, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022 China

University of Science and Technology of China, Hefei, 230026 China

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First published: 08 May 2023
Citations: 4

Graphical Abstract

A strategy for constructing a supported catalyst featuring immobilization-enhanced proton tolerance for the synthesis of colorless ULMW CO2-polyols is proposed. The key design feature lies in the loading of aluminum aminoporphyrins on swellable Merrifield resin to afford the multiple cooperativity of porphyrins in the supported catalysts.

Abstract

Ultra-low molecular weight (ULMW) CO2-polyols with well-defined hydroxyl end groups represent useful soft segments for the preparation of high-performance polyurethane foams. However, owing to the poor proton tolerance of catalysts towards CO2/epoxide telomerization, it remains challenging to synthesize ULMW yet colorless CO2-polyols. Herein, we propose an immobilization strategy of constructing supported catalysts by chemical anchoring of aluminum porphyrin on Merrifield resin. The resulting supported catalyst displays both extremely high proton tolerance (≈8000 times the equivalents of metal centers) and independence of cocatalyst, affording CO2-polyols with ULMW (580 g mol−1) and high polymer selectivity (>99 %). Moreover, the ULMW CO2-polyols with various architectures (tri-, quadra-, and hexa-arm) can be obtained, suggesting the wide proton universality of supported catalysts. Notably, benefiting from the heterogeneous nature of the supported catalyst, colorless products can be facilely achieved by simple filtration. The present strategy provides a platform for the synthesis of colorless ULMW polyols derived from not only CO2/epoxides, but also lactone, anhydrides etc. or their combinations.

Conflict of interest

The authors declare no competing financial interests.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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