期刊
NATURE COMMUNICATIONS
卷 11, 期 1, 页码 -出版社
NATURE PORTFOLIO
DOI: 10.1038/s41467-020-18431-7
关键词
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资金
- Northwestern University (NU)
- S10 shared instrumentation grant [1 S10 OD010398-01]
- Northwestern University's NUANCE Center, NNCI-SHyNE Resource [NSF ECCS-1542205]
- MRSEC program [NSF DMR-1720139]
- NSF [CHE-1836392]
- Department of Energy [DE-AC02-06CH11357, DE-SC0004752]
- Office of the Provost, the Office for Research
- Northwestern University Information Technology
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DEFG02-99ER14999]
Two-photon excited near-infrared fluorescence materials have garnered considerable attention because of their superior optical penetration, higher spatial resolution, and lower optical scattering compared with other optical materials. Herein, a convenient and efficient supramolecular approach is used to synthesize a two-photon excited near-infrared emissive co-crystalline material. A naphthalenediimide-based triangular macrocycle and coronene form selectively two co-crystals. The triangle-shaped co-crystal emits deep-red fluorescence, while the quadrangle-shaped co-crystal displays deep-red and near-infrared emission centered on 668 nm, which represents a 162 nm red-shift compared with its precursors. Benefiting from intermolecular charge transfer interactions, the two co-crystals possess higher calculated two-photon absorption cross-sections than those of their individual constituents. Their two-photon absorption bands reach into the NIR-II region of the electromagnetic spectrum. The quadrangle-shaped co-crystal constitutes a unique material that exhibits two-photon absorption and near-infrared emission simultaneously. This co-crystallization strategy holds considerable promise for the future design and synthesis of more advanced optical materials.
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