Fabrication of Au25(SG)18–ZIF-8 Nanocomposites: A Facile Strategy to Position Au25(SG)18 Nanoclusters Inside and Outside ZIF-8

Yucheng Luo; Shiyan Fan; Wenqian Yu; Zili Wu; David A. Cullen; Chaolun Liang; Jianying Shi; Chengyong Su

doi:10.1002/adma.201704576

Fabrication of Au₂₅(SG)₁₈–ZIF-8 Nanocomposites: A Facile Strategy to Position Au₂₅(SG)₁₈ Nanoclusters Inside and Outside ZIF-8

Yucheng Luo, Shiyan Fan, Wenqian Yu, Zili Wu, David A. Cullen, Chaolun Liang, Jianying Shi, Chengyong Su

Research output: Contribution to journal › Article › peer-review

156 Scopus citations

Abstract

Multifunctional composite materials are currently highly desired for sustainable energy applications. A general strategy to integrate atomically precise Au₂₅(SG)₁₈ with ZIF-8 (Zn(MeIm)₂, MeIm = 2-methylimidazole), is developed via the typical Zn-carboxylate type of linkage. Au₂₅(SG)₁₈ are uniformly encapsulated into a ZIF-8 framework (Au₂₅(SG)₁₈@ZIF-8) by coordination-assisted self-assembly. In contrast, Au₂₅(SG)₁₈ integrated by simple impregnation is oriented along the outer surface of ZIF-8 (Au₂₅(SG)₁₈/ZIF-8). The porous structure and thermal stability of these nanocomposites are characterized by N₂ adsorption–desorption isothermal analysis and thermal gravimetric analysis. The distribution of Au₂₅(SG)₁₈ in the two nanocomposites is confirmed by electron microscopy, and the accessibility of Au₂₅(SG)₁₈ is evaluated by the 4-nitrophenol reduction reaction. The as-prepared nanocomposites retain the high porosity and thermal stability of the ZIF-8 matrix, while also exhibiting the desired catalytic and optical properties derived from the integrated Au₂₅(SG)₁₈ nanoclusters (NCs). Au₂₅(SG)₁₈@ZIF-8 with isolated Au₂₅ sites is a promising heterogenous catalyst with size selectivity imparted by the ZIF-8 matrix. The structural distinction between Au₂₅(SG)₁₈@ZIF-8 and Au₂₅(SG)₁₈/ZIF-8 determines their different emission features, and provides a new strategy to adjust the optical behavior of Au₂₅(SG)₁₈ for applications in bioimaging and biotherapy.

Original language	English
Article number	1704576
Journal	Advanced Materials
Volume	30
Issue number	6
DOIs	https://doi.org/10.1002/adma.201704576
State	Published - Feb 8 2018

Funding

The authors gratefully acknowledge the financial support from the 973 Program (2014CB845600), the NSFC Project (21643017 and 21720102007), the NSF of Guangdong Province (2016A030313268 and S2013030013474), the STP Project of Guangzhou (201504010031), and the Fundamental Research Funds for the Central Universities (No. 17lgzd18). The A-berration-corrected STEM imaging was conducted at the Center for Nanophase Materials Sciences, which is a DOE Office of Science User Facility.

Keywords

4-NP reduction
Au(SG) nanocluster
ZIF-8
fluorescence
nanocomposites

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1002/adma.201704576

Cite this

@article{422ae4fbf9cb4b2ea1d1c0a5ed66d96c,

title = "Fabrication of Au25(SG)18–ZIF-8 Nanocomposites: A Facile Strategy to Position Au25(SG)18 Nanoclusters Inside and Outside ZIF-8",

abstract = "Multifunctional composite materials are currently highly desired for sustainable energy applications. A general strategy to integrate atomically precise Au25(SG)18 with ZIF-8 (Zn(MeIm)2, MeIm = 2-methylimidazole), is developed via the typical Zn-carboxylate type of linkage. Au25(SG)18 are uniformly encapsulated into a ZIF-8 framework (Au25(SG)18@ZIF-8) by coordination-assisted self-assembly. In contrast, Au25(SG)18 integrated by simple impregnation is oriented along the outer surface of ZIF-8 (Au25(SG)18/ZIF-8). The porous structure and thermal stability of these nanocomposites are characterized by N2 adsorption–desorption isothermal analysis and thermal gravimetric analysis. The distribution of Au25(SG)18 in the two nanocomposites is confirmed by electron microscopy, and the accessibility of Au25(SG)18 is evaluated by the 4-nitrophenol reduction reaction. The as-prepared nanocomposites retain the high porosity and thermal stability of the ZIF-8 matrix, while also exhibiting the desired catalytic and optical properties derived from the integrated Au25(SG)18 nanoclusters (NCs). Au25(SG)18@ZIF-8 with isolated Au25 sites is a promising heterogenous catalyst with size selectivity imparted by the ZIF-8 matrix. The structural distinction between Au25(SG)18@ZIF-8 and Au25(SG)18/ZIF-8 determines their different emission features, and provides a new strategy to adjust the optical behavior of Au25(SG)18 for applications in bioimaging and biotherapy.",

keywords = "4-NP reduction, Au(SG) nanocluster, ZIF-8, fluorescence, nanocomposites",

author = "Yucheng Luo and Shiyan Fan and Wenqian Yu and Zili Wu and Cullen, {David A.} and Chaolun Liang and Jianying Shi and Chengyong Su",

note = "Publisher Copyright: {\textcopyright} 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",

year = "2018",

month = feb,

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doi = "10.1002/adma.201704576",

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T1 - Fabrication of Au25(SG)18–ZIF-8 Nanocomposites

T2 - A Facile Strategy to Position Au25(SG)18 Nanoclusters Inside and Outside ZIF-8

AU - Luo, Yucheng

AU - Fan, Shiyan

AU - Yu, Wenqian

AU - Wu, Zili

AU - Cullen, David A.

AU - Liang, Chaolun

AU - Shi, Jianying

AU - Su, Chengyong

PY - 2018/2/8

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N2 - Multifunctional composite materials are currently highly desired for sustainable energy applications. A general strategy to integrate atomically precise Au25(SG)18 with ZIF-8 (Zn(MeIm)2, MeIm = 2-methylimidazole), is developed via the typical Zn-carboxylate type of linkage. Au25(SG)18 are uniformly encapsulated into a ZIF-8 framework (Au25(SG)18@ZIF-8) by coordination-assisted self-assembly. In contrast, Au25(SG)18 integrated by simple impregnation is oriented along the outer surface of ZIF-8 (Au25(SG)18/ZIF-8). The porous structure and thermal stability of these nanocomposites are characterized by N2 adsorption–desorption isothermal analysis and thermal gravimetric analysis. The distribution of Au25(SG)18 in the two nanocomposites is confirmed by electron microscopy, and the accessibility of Au25(SG)18 is evaluated by the 4-nitrophenol reduction reaction. The as-prepared nanocomposites retain the high porosity and thermal stability of the ZIF-8 matrix, while also exhibiting the desired catalytic and optical properties derived from the integrated Au25(SG)18 nanoclusters (NCs). Au25(SG)18@ZIF-8 with isolated Au25 sites is a promising heterogenous catalyst with size selectivity imparted by the ZIF-8 matrix. The structural distinction between Au25(SG)18@ZIF-8 and Au25(SG)18/ZIF-8 determines their different emission features, and provides a new strategy to adjust the optical behavior of Au25(SG)18 for applications in bioimaging and biotherapy.

AB - Multifunctional composite materials are currently highly desired for sustainable energy applications. A general strategy to integrate atomically precise Au25(SG)18 with ZIF-8 (Zn(MeIm)2, MeIm = 2-methylimidazole), is developed via the typical Zn-carboxylate type of linkage. Au25(SG)18 are uniformly encapsulated into a ZIF-8 framework (Au25(SG)18@ZIF-8) by coordination-assisted self-assembly. In contrast, Au25(SG)18 integrated by simple impregnation is oriented along the outer surface of ZIF-8 (Au25(SG)18/ZIF-8). The porous structure and thermal stability of these nanocomposites are characterized by N2 adsorption–desorption isothermal analysis and thermal gravimetric analysis. The distribution of Au25(SG)18 in the two nanocomposites is confirmed by electron microscopy, and the accessibility of Au25(SG)18 is evaluated by the 4-nitrophenol reduction reaction. The as-prepared nanocomposites retain the high porosity and thermal stability of the ZIF-8 matrix, while also exhibiting the desired catalytic and optical properties derived from the integrated Au25(SG)18 nanoclusters (NCs). Au25(SG)18@ZIF-8 with isolated Au25 sites is a promising heterogenous catalyst with size selectivity imparted by the ZIF-8 matrix. The structural distinction between Au25(SG)18@ZIF-8 and Au25(SG)18/ZIF-8 determines their different emission features, and provides a new strategy to adjust the optical behavior of Au25(SG)18 for applications in bioimaging and biotherapy.

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