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Porous and Water Stable 2D Hybrid Metal Halide with Broad Light Emission and Selective H2O Vapor Sorption |
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| Authors: | Ali Azmy Shunran Li Giasemi K. Angeli Claire Welton Parth Raval Min Li Nourdine Zibouche Lukasz Wojtas G. N. Manjunatha Reddy Peijun Guo Pantelis N. Trikalitis Ioannis Spanopoulos |
| Affiliation: | 1. Department of Chemistry, University of South Florida, Tampa, FL 33620 USA;2. Department of Chemical and Environmental Engineering, Yale University, 9 Hillhouse Avenue, New Haven, CT 06520 USA Energy Sciences Institute, Yale University, 810 West Campus Drive, West Haven, CT 06516 USA;3. Department of Chemistry, University of Crete, 71003 Heraklion, Greece;4. University of Lille, CNRS, Centrale Lille Institut, Univ. Artois, UMR8181-UCCS-Unité de Catalyse et Chimie du Solide, 59000 Lille, France;5. West Campus Materials Characterization Core, Yale University, New Haven, CT 06520 USA;6. Department of Chemistry, University of Bath, Bath, BA2 7AY UK |
| Abstract: | In this work we report a strategy for generating porosity in hybrid metal halide materials using molecular cages that serve as both structure-directing agents and counter-cations. Reaction of the [2.2.2] cryptand (DHS) linker with PbII in acidic media gave rise to the first porous and water-stable 2D metal halide semiconductor (DHS)2Pb5Br14. The corresponding material is stable in water for a year, while gas and vapor-sorption studies revealed that it can selectively and reversibly adsorb H2O and D2O at room temperature (RT). Solid-state NMR measurements and DFT calculations verified the incorporation of H2O and D2O in the organic linker cavities and shed light on their molecular configuration. In addition to porosity, the material exhibits broad light emission centered at 617 nm with a full width at half-maximum (FWHM) of 284 nm (0.96 eV). The recorded water stability is unparalleled for hybrid metal halide and perovskite materials, while the generation of porosity opens new pathways towards unexplored applications (e.g. solid-state batteries) for this class of hybrid semiconductors. |
| Keywords: | Broad Light Emission Gas Separation Microporous Materials Semiconductors Water Stability |