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Tunable Solid-State Multicolor Emission in Substitutional Solid Solutions of Metal-Organic Frameworks

preprint
submitted on 26.04.2019 and posted on 30.04.2019 by Wesley Newsome, Suliman Ayad, Jesus Cordova, Eric Reinheimer, Andres Campiglia, James Harper, Kenneth Hanson, Fernando Uribe-Romo
Realization of organic-based substitutional solid solutions will facilitate the preparation of solid-state materials with properties that arise from phenomena only displayed by molecules in solution. We demonstrate that multivariate metal-organic frameworks, MOFs, exhibit organic-based substitutional solid solution behavior by tuning their fluorescence, dictated exclusively by predetermined ratios of multivariate organic links. By combining non-fluorescent links with dilute mixtures of red, green, and blue fluorescent links we prepared zirconia-type MOFs that exhibit features of solution-like fluorescence. Our study found that MOFs with fluorophore link concentration of around 1 %mol exhibit fluorescence with decreased inner filtering demonstrated by changes in spectra profiles, quantum yields, and lifetime dynamics expected for excited state proton transfer emitters. Our findings enabled us to prepare organic-based substitutional solid solutions with tunable chromaticity. These materials emit multicolor and white light with high quantum yields, long shelf life, and superb hydrolytic stability at ambient conditions.

Funding

CHE-1665257

CHE-1531629

History

Email Address of Submitting Author

wesnewsome@knights.ucf.edu

Institution

University of Central Florida

Country

USA

ORCID For Submitting Author

0000-0002-5704-6224

Declaration of Conflict of Interest

None

Exports