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Issue 20, 2012
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One-dimensional metal–organic framework photonic crystals used as platforms for vapor sorption

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Abstract

We present the fabrication of one-dimensional photonic crystals (Bragg stacks) based on a microporous metal–organic framework material and mesoporous titanium dioxide. The Bragg stack heterostructures were obtained using two complementary synthesis approaches utilizing the bottom-up assembly of heterogeneous, i.e. two-component photonic crystal multilayer structures. Zeolitic imidazolate framework ZIF-8 and mesoporous titanium dioxide were chosen as functional components with different refractive indices. While ZIF-8 is intended to impart molecular selectivity, mesoporous TiO2 is used to ensure high refractive index contrast and to guarantee molecular diffusion within the Bragg stack. The combination of micro- and mesoporosity within one scaffold endows the 1D-MOF PC with characteristic adsorption properties upon exposure to various organic vapors. In this context, the sorption behavior of the photonic material was studied as a function of partial pressure of organic vapors. The results show that the multilayered photonic heterostructures are sensitive and selective towards a series of chemically similar solvent vapors. It is thus anticipated that the concept of multilayer heterogeneous photonic structures will provide a versatile platform for future selective, label-free optical sensors.

Graphical abstract: One-dimensional metal–organic framework photonic crystals used as platforms for vapor sorption

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Publication details

The article was received on 05 Nov 2011, accepted on 28 Mar 2012 and first published on 19 Apr 2012


Article type: Paper
DOI: 10.1039/C2JM15685G
Citation: J. Mater. Chem., 2012,22, 10356-10362
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    One-dimensional metal–organic framework photonic crystals used as platforms for vapor sorption

    F. M. Hinterholzinger, A. Ranft, J. M. Feckl, B. Rühle, T. Bein and B. V. Lotsch, J. Mater. Chem., 2012, 22, 10356
    DOI: 10.1039/C2JM15685G

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