Plug-and-Play Optical Materials from Fluorescent Dyes and Macrocycles

By Christopher R. Benson, Laura Kacenauskaite, Katherine L. VanDenburgh, Wei Zhao, B. Qiao, Tumpa Sadhukhan, M. Pink, Junsheng Chen, S. Borgi, Chun-Hsing Chen and 5 more. Chem, 2020

155 citations recorded by the source corpus.

Summary Fluorescence is critical to applications in optical materials including OLEDs and photonics. While fluorescent dyes are potential key components of these materials, electronic coupling between them in the solid state quenches their emission, preventing their reliable translation to applications. We report a universal solution to this long-standing problem with the discovery of a class of materials called small-molecule ionic isolation lattices (SMILES). SMILES perfectly transfer the optical properties of dyes to solids, are simple to make by mixing cationic dyes with anion-binding cyanostar macrocycles, and work with major classes of commercial dyes, including xanthenes, oxazines, styryls, cyanines, and trianguleniums. Dyes are decoupled spatially and electronically in the lattice by using cyanostar with its wide band gap. Toward applications, SMILES crystals have the highest known brightness per volume and solve concentration quenching to impart fluorescence to commercial polymers. SMILES materials enable predictable fluorophore crystallization to fulfill the promise of optical materials by design.

Subfields: Electrical and Electronic Engineering, Materials Chemistry, Spectroscopy

View Paper: https://www.semanticscholar.org/paper/1ab250fb58b39704fbf1da8b72044607e2378806