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journal article·2023-05Open access

Sequential Sol‐Gel Self‐Assembly and Nonclassical Gel‐Crystal Transformation of the Metal‐Organic Framework Gel

Jiarui Fu, Ziyan He, Eduardo Schott, Honghan Fei, Min Tu, Yi‐nan Wu

Small· Volume 19· Issue 18
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Source abstract

Abstract

Abstract Metal‐organic framework (MOF) gel, an emerging subtype of MOF structure, is unique in formation and function; however, its evolutionary process remains elusive. Here, the evolution of a model gel‐based MOF, UiO‐66(Zr) gel, is explored by demonstrating its sequential sol‐gel self‐assembly and nonclassical gel‐crystal transformation. The control of the sol‐gel process enables the observation and characterization of structures in each assembly stage (phase‐separation, polycondensation, and hindered‐crystallization) and facilitates the preparation of hierarchical materials with giant mesopores. The gelation mechanism is tentatively attributed to the formation of zirconium oligomers. By further utilizing the pre‐synthesized gel, the nonclassical gel‐crystal transformation is achieved by the modulation in an unconventional manner, which sheds light on crystal intermediates and distinct crystallization motions (“growth and splitting” and “aggregation and fusion”). The overall sol‐gel and gel‐crystal evolutions of UiO‐66(Zr) enrich self‐assembly and crystallization domains, inspire the design of functional structures, and demand more in‐depth research on the intermediates in the future.
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Research context

OpenAlex topics: Metal-Organic Frameworks: Synthesis and Applications · Polyoxometalates: Synthesis and Applications · Supramolecular Self-Assembly in Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Environmental Science and Engineering State Key Laboratory of Pollution Control and Resource Reuse Tongji University 1239 Siping Rd. Shanghai 200092 China

Shanghai Institute of Pollution Control and Ecological Security 1239 Siping Rd. Shanghai 200092 China

Department of Inorganic Chemistry of the Faculty of Chemistry and Pharmacy Pontificia Universidad Católica de Chile Vicuña Mackenna 4860 Macul Santiago 7820436 Chile

School of Chemical Science and Engineering Shanghai Key Laboratory of Chemical Assessment and Sustainability Tongji University 1239 Siping Rd. Shanghai 200092 China

State Key Laboratory of Transducer Technology Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China

2020 X‐Lab Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China

Funding

Tongji University · National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities

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