Two-photon excited deep-red and near-infrared emissive organic co-crystals

Two-photon excited deep-red and near-infrared emissive organic co-crystals

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 use...

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Bibliographic Details
Published in:Nature communications 2020-09, Vol.11 (1), p.4633-4633, Article 4633
Main Authors: Wang, Yu, Wu, Huang, Li, Penghao, Chen, Su, Jones, Leighton O, Mosquera, Martín A, Zhang, Long, Cai, Kang, Chen, Hongliang, Chen, Xiao-Yang, Stern, Charlotte L, Wasielewski, Michael R, Ratner, Mark A, Schatz, George C, Stoddart, J Fraser
Format: Article
Language:eng
Subjects:
Absorption
Absorption cross sections
Absorption spectra
Charge transfer
Crystal engineering
Crystal structure
Crystallinity
Crystallization
Crystals
Doppler effect
Emission
Emissions
Emissivity
Fluorescence
I.R. radiation
MATERIALS SCIENCE
Microscopes
Near infrared radiation
Optical materials
Optical properties
Optics
Photon absorption
Photons
Red shift
Self-assembly
Spatial discrimination
Spatial resolution
Synthesis
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Summary: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.
ISSN:2041-1723
2041-1723