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Self-templated chemically stable hollow spherical covalent organic framework

Author

Listed:
  • Sharath Kandambeth

    (CSIR-National Chemical Laboratory
    Academy of Scientific and Innovative Research (AcSIR))

  • V. Venkatesh

    (Indian Institute of Technology Kanpur)

  • Digambar B. Shinde

    (CSIR-National Chemical Laboratory)

  • Sushma Kumari

    (Academy of Scientific and Innovative Research (AcSIR)
    Chemical Engineering and Process Development, CSIR-National Chemical Laboratory)

  • Arjun Halder

    (CSIR-National Chemical Laboratory
    Academy of Scientific and Innovative Research (AcSIR))

  • Sandeep Verma

    (Indian Institute of Technology Kanpur)

  • Rahul Banerjee

    (CSIR-National Chemical Laboratory
    Academy of Scientific and Innovative Research (AcSIR))

Abstract

Covalent organic frameworks are a family of crystalline porous materials with promising applications. Although active research on the design and synthesis of covalent organic frameworks has been ongoing for almost a decade, the mechanisms of formation of covalent organic frameworks crystallites remain poorly understood. Here we report the synthesis of a hollow spherical covalent organic framework with mesoporous walls in a single-step template-free method. A detailed time-dependent study of hollow sphere formation reveals that an inside-out Ostwald ripening process is responsible for the hollow sphere formation. The synthesized covalent organic framework hollow spheres are highly porous (surface area ∼1,500 m2g−1), crystalline and chemically stable, due to the presence of strong intramolecular hydrogen bonding. These mesoporous hollow sphere covalent organic frameworks are used for a trypsin immobilization study, which shows an uptake of 15.5 μmol g−1 of trypsin.

Suggested Citation

  • Sharath Kandambeth & V. Venkatesh & Digambar B. Shinde & Sushma Kumari & Arjun Halder & Sandeep Verma & Rahul Banerjee, 2015. "Self-templated chemically stable hollow spherical covalent organic framework," Nature Communications, Nature, vol. 6(1), pages 1-10, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms7786
    DOI: 10.1038/ncomms7786
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    Cited by:

    1. Hui Li & Caikun Cheng & Zhijie Yang & Jingjing Wei, 2022. "Encapsulated CdSe/CdS nanorods in double-shelled porous nanocomposites for efficient photocatalytic CO2 reduction," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
    2. Gobinda Das & Thirumurugan Prakasam & Nour Alkhatib & Rasha G. AbdulHalim & Falguni Chandra & Sudhir Kumar Sharma & Bikash Garai & Sabu Varghese & Matthew A. Addicoat & Florent Ravaux & Renu Pasricha , 2023. "Light-driven self-assembly of spiropyran-functionalized covalent organic framework," Nature Communications, Nature, vol. 14(1), pages 1-16, December.

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