具有结构调整的尖端到中间各向异性 MOF-on-MOF 生长,Journal of the American Chemical Society

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具有结构调整的尖端到中间各向异性 MOF-on-MOF 生长
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2020-01-23 , DOI: 10.1021/jacs.9b12193
Gihyun Lee ₁ , Sujeong Lee ₁ , Sojin Oh ₁ , Dooyoung Kim ₁ , Moonhyun Oh ₁

Affiliation

由于其潜在的用途，具有复杂结构或组件的混合金属有机框架 (MOF) 的组织结构非常重要。在这方面，具有不同组分和/或结构的两个以上 MOF 的共轭是生产混合 MOF 的明智策略。MOF-on-MOF 的生长是两个 MOF 共轭的基础，对于精细控制的共轭和组织良好的混合 MOF 的形成，应该深入了解。在此，我们报告了一个有趣的 MOF 生长过程，用于构建包含异质成分和细胞晶格的混合 MOF 颗粒。有趣的是，即使新生长的 MOF 和 MOF 模板具有不匹配的细胞晶格，各向异性生长也会导致出人意料地定义明确的核壳型混合 MOF。对生长过程的综合监测揭示了 MOF 上 MOF 的从尖端到中间的生长，这阐明了尽管各向异性生长，但明确定义的核壳杂化的罕见形成。从尖端到中间的各向异性生长过程伴随着 MOF 细胞晶格的自我调整以锚定在早期反应阶段具有错配细胞晶格的模板表面，以及在中间细胞晶格自我回复到原始的舒适构型反应阶段。

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Tip-to-Middle Anisotropic MOF-on-MOF Growth with a Structural Adjustment

Well-organized construction of hybrid metal-organic frameworks (MOFs) with complicated structures or components is a great importance because of their potential usefulness. In this regard, the conjugation of more than two MOFs, which have dissimilar components and/or structures, is a smart strategy for the production of hybrid MOFs. A MOF-on-MOF growth is fundamental for the conjugation of two MOFs and should be deeply understood for the fine-controlled conjugation and for the formation of well-organized hybrid MOFs. Herein, we report an interesting MOF growth process for the construction of hybrid MOF particles containing heterogeneous components and cell lattices. Interestingly, even though a newly grown MOF and a MOF template have mismatched cell lattices, the anisotropic growth results in unexpectedly well-defined core-shell-type hybrid MOFs. Comprehensive monitoring of the growth process revealed a tip-to-middle MOF-on-MOF growth, which elucidates the uncommon formation of a well-defined core-shell hybrid despite the anisotropic growth. A tip-to-middle anisotropic growth process is accompanied with self-adjustment of MOF cell lattices to anchor on the template surface having mismatched cell lattices in the early reaction stage, and self-reversion of cell lattices to the original comfortable configuration in the middle stage of the reaction.

更新日期：2020-01-23

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