Nanoporous designer solids with huge lattice constant gradients: Multiheteroepitaxy of metal-organic frameworks

Zhengbang Wang; Jinxuan Liu; Binit Lukose; Zhigang Gu; Peter G. Weidler; Hartmut Gliemann; Thomas Heine; Christof Wöll

doi:10.1021/nl404767k

Nanoporous designer solids with huge lattice constant gradients: Multiheteroepitaxy of metal-organic frameworks

Zhengbang Wang, Jinxuan Liu, Binit Lukose, Zhigang Gu, Peter G. Weidler, Hartmut Gliemann, Thomas Heine, Christof Wöll

Department of Chemistry

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

95 Citations (Scopus)

Abstract

We demonstrate the realization of hierarchically organized MOF (metal-organic framework) multilayer systems with pronounced differences in the size of the nanoscale pores. Unusually large values for the lattice constant mismatch at the MOF-MOF heterojunctions are made possible by a particular liquid-phase epitaxy process. The multiheteroepitaxy is demonstrated for the isoreticular SURMOF-2 series [ Liu et al. Sci. Rep. 2012, 2, 921 ] by fabricating trilayer systems with lattice constants of 1.12, 1.34, and 1.55 nm. Despite these large (20%) lattice mismatches, highly crystalline, oriented multilayers were obtained. A thorough theoretical analysis of the MOF-on-MOF heterojunction structure and energetics allows us to identify the two main reasons for this unexpected tolerance of large lattice mismatch: the healing of vacancies with acetate groups and the low elastic constant of MOF materials.

Original language	English
Pages (from-to)	1526-1529
Number of pages	4
Journal	Nano letters
Volume	14
Issue number	3
DOIs	https://doi.org/10.1021/nl404767k
Publication status	Published - 2014 Mar 12

All Science Journal Classification (ASJC) codes

Bioengineering
Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanical Engineering

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10.1021/nl404767k

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title = "Nanoporous designer solids with huge lattice constant gradients: Multiheteroepitaxy of metal-organic frameworks",

abstract = "We demonstrate the realization of hierarchically organized MOF (metal-organic framework) multilayer systems with pronounced differences in the size of the nanoscale pores. Unusually large values for the lattice constant mismatch at the MOF-MOF heterojunctions are made possible by a particular liquid-phase epitaxy process. The multiheteroepitaxy is demonstrated for the isoreticular SURMOF-2 series [ Liu et al. Sci. Rep. 2012, 2, 921 ] by fabricating trilayer systems with lattice constants of 1.12, 1.34, and 1.55 nm. Despite these large (20%) lattice mismatches, highly crystalline, oriented multilayers were obtained. A thorough theoretical analysis of the MOF-on-MOF heterojunction structure and energetics allows us to identify the two main reasons for this unexpected tolerance of large lattice mismatch: the healing of vacancies with acetate groups and the low elastic constant of MOF materials.",

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T2 - Multiheteroepitaxy of metal-organic frameworks

AU - Wang, Zhengbang

AU - Liu, Jinxuan

AU - Lukose, Binit

AU - Gu, Zhigang

AU - Weidler, Peter G.

AU - Gliemann, Hartmut

AU - Heine, Thomas

AU - Wöll, Christof

PY - 2014/3/12

Y1 - 2014/3/12

N2 - We demonstrate the realization of hierarchically organized MOF (metal-organic framework) multilayer systems with pronounced differences in the size of the nanoscale pores. Unusually large values for the lattice constant mismatch at the MOF-MOF heterojunctions are made possible by a particular liquid-phase epitaxy process. The multiheteroepitaxy is demonstrated for the isoreticular SURMOF-2 series [ Liu et al. Sci. Rep. 2012, 2, 921 ] by fabricating trilayer systems with lattice constants of 1.12, 1.34, and 1.55 nm. Despite these large (20%) lattice mismatches, highly crystalline, oriented multilayers were obtained. A thorough theoretical analysis of the MOF-on-MOF heterojunction structure and energetics allows us to identify the two main reasons for this unexpected tolerance of large lattice mismatch: the healing of vacancies with acetate groups and the low elastic constant of MOF materials.

AB - We demonstrate the realization of hierarchically organized MOF (metal-organic framework) multilayer systems with pronounced differences in the size of the nanoscale pores. Unusually large values for the lattice constant mismatch at the MOF-MOF heterojunctions are made possible by a particular liquid-phase epitaxy process. The multiheteroepitaxy is demonstrated for the isoreticular SURMOF-2 series [ Liu et al. Sci. Rep. 2012, 2, 921 ] by fabricating trilayer systems with lattice constants of 1.12, 1.34, and 1.55 nm. Despite these large (20%) lattice mismatches, highly crystalline, oriented multilayers were obtained. A thorough theoretical analysis of the MOF-on-MOF heterojunction structure and energetics allows us to identify the two main reasons for this unexpected tolerance of large lattice mismatch: the healing of vacancies with acetate groups and the low elastic constant of MOF materials.

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Nanoporous designer solids with huge lattice constant gradients: Multiheteroepitaxy of metal-organic frameworks

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