Amorphous/crystalline HTiNbO5-X membranes for efficient confined flow synthesis of acetate ester flavours

Zhenyuan Fang, Xiang Li, Yajie Bai, Yuhui Zhang, Guandi He, Shuai Pang, Fan Xia, Daoling Peng, Xiqi Zhang () and Lei Jiang
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Zhenyuan Fang: Beihang University
Xiang Li: Chinese Academy of Sciences
Yajie Bai: Ningbo University of Technology
Yuhui Zhang: University of Science and Technology of China
Guandi He: Chinese Academy of Sciences
Shuai Pang: University of Science and Technology of China
Fan Xia: China University of Geosciences
Daoling Peng: South China Normal University
Xiqi Zhang: Chinese Academy of Sciences
Lei Jiang: Beihang University

Nature Communications, 2025, vol. 16, issue 1, 1-11

Abstract: Abstract Ideal laminar membrane reactors (LMR) necessitate the rational construction of 2D nanoconfined channels and regulation of microenvironment. The intrinsic structure-activity relationship of laminar membrane reactors essentially remains unclear. Herein, amorphous/crystalline HTiNbO5-X nanosheets (NS) with abundant oxygen vacancy (VO) are successfully prepared and stacked as 2D sub-nanoconfined membrane flow reactors with different interlayer spacings. When the interlayer spacing is decreased to 11.0 Å, the representative HTiNbO5-X membrane exhibits impressive conversion of ≈ 100% within 26.6 s and turnover number of up to 306.42 for the esterification of benzyl alcohol at 23 °C. The combination of structural characterizations and theoretical calculations reveals that the synergistic effect of VO and sub-nanoscale confinement greatly promotes the adsorption and orbital symmetry matching of reactants, and reduces the overall energy barrier. Furthermore, the HTiNbO5-X LMR is accessible for other alcohol derivatives, indicating the efficient and green synthesis of acetate ester flavours under mild conditions. This work demonstrates the promising potential of the metal oxide nanosheets to create inorganic laminar membrane reactors for continuous organic synthesis.

Date: 2025
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DOI: 10.1038/s41467-025-61411-y

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