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A Highly Solvent‐Stable Metal–Organic Framework Nanosheet: Morphology Control, Exfoliation, and Luminescent Property
Author(s) -
Han LiJuan,
Zheng Dong,
Chen ShuGuang,
Zheng HeGen,
Ma Jing
Publication year - 2018
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201703873
Subject(s) - nanosheet , exfoliation joint , materials science , solvent , metal organic framework , chemical engineering , quantum yield , metal , fluorescence , metal ions in aqueous solution , nanotechnology , organic chemistry , chemistry , metallurgy , graphene , physics , adsorption , quantum mechanics , engineering
Abstract Compared to bulk metal–organic framework (MOF), 2D MOF nanosheets have gained intensive research attention due to their ultrathin thickness and large surface area with highly accessible active sites. However, structural deterioration and morphological damage have impeded producing high‐quality MOF nanosheets during exfoliation. Here, first a new layered bulk MOF ZSB‐1 is synthesized and several solvents such as isopropanol, methanol, n ‐hexyl alcohol, and N , N ‐dimethylformamide are surveyed to examine their performance for the exfoliation of layered ZSB‐1. As a result, a highly solvent‐stable metal–organic framework rectangular nanosheet retaining undamaged morphology is obtained by the soft‐physical method in n ‐hexyl alcohol. Theoretical simulations reveal that the strong interaction energy between n ‐hexyl alcohol and MOF layers is responsible for the best exfoliation performance of making the bulk MOF into nanosheets. In addition, ZSB‐1 shows a tunable fluorescence peak position, fluorescent lifetime, and quantum yield by simply changing the solvent and morphology. Besides, the ZSB‐1 was selected as a fluorescence sensor to detect metal ions, and ZSB‐1 nanosheet exhibits excellent sensing ability for Fe 3+ . It is worth noting that the ZSB‐1 nanosheet has better detection limit performance of 0.054 × 10 −6 m than that of its bulk counterpart.