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Journal Article

One-dimensional metal-organic framework photonic crystals used as platforms for vapor sorption


Lotsch,  B. V.
Department Nanochemistry (Bettina V. Lotsch), Max Planck Institute for Solid State Research, Max Planck Society;

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Hinterholzinger, F. M., Ranft, A., Feckl, J. M., Rühle, B., Bein, T., & Lotsch, B. V. (2012). One-dimensional metal-organic framework photonic crystals used as platforms for vapor sorption. ´Journal of Materials Chemistry, 22(20), 10356-10362.

Cite as: https://hdl.handle.net/21.11116/0000-000E-C337-8
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.