Mixed cluster heterometallic metal-organic frameworks for complex optical tags
| DWPI Title: Synthesizing optical tag used for identifying, providing provenance for materials, involves mixing first and other rare earth salt, carboxylic acid-based linker, modulator in solvent followed by reacting mixture, cooling to precipitate crystals of mixed cluster heterometallic metal-organic framework |
| Abstract: A rapid and facile design strategy to create a highly complex optical tag with programmable, multimodal photoluminescent properties is described. This is achieved via intrinsic and biomolecule-fluorophore hidden signatures. As a first covert feature of the tag, an intricate novel heterometallic near-infrared (NIR) emitting mesoporous metal-organic framework (MOF) was synthesized comprising homometallic hexanuclear clusters based on Nd and Yb. To generate controlled, multimodal, and tailorable emission with difficult to counterfeit features, the NIR emissive MOF was post-synthetically modified via a fluorescent biomolecule labeling design strategy. The surface attachment of several distinct fluorophores, including the simultaneous attachment of up to three distinct fluorescently labeled DNA oligos was demonstrated, with excitation and emission properties across the visible spectrum (480-800 nm). The DNA inclusion as a secondary covert element in the tag was demonstrated via detection of SYBR Gold dye association. |
| Use: Method for synthesizing optical tag used for identifying, tracking, and providing provenance for materials; and maintaining high coding capacity, and providing complex signature to prevent duplication. |
| Advantage: The method is rapid and facile method to create highly complex optical tag with programmable, and multimodal photo luminescent properties. |
| Novelty: Synthesizing optical tag involves mixing first rare earth salt, other rare earth salt, carboxylic acid-based linker and modulator in solvent; reacting mixture at high temperature and time to form reaction product; and cooling reaction product to precipitate crystals of mixed cluster heterometallic metal-organic framework comprising first rare earth-based cluster and one other rare earth-based cluster connected by carboxylic-acid based linkers. |
| Filed: 12/13/2022 |
| Application Number: US18080051A |
| Tech ID: SD 15351.3 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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