Open AccessTwo‐Photon Excited Near‐Infrared Phosphorescence Based on Secondary Supramolecular Confinement
Author(s) -
Ma XinKun,
Zhou Xiaolu,
Wu Jing,
Shen FangFang,
Liu Yu
Publication year - 2022
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202201182
Subject(s) - phosphorescence , luminescence , absorption (acoustics) , photochemistry , materials science , excited state , supramolecular chemistry , aqueous solution , persistent luminescence , optoelectronics , excitation , chemistry , fluorescence , optics , molecule , atomic physics , organic chemistry , physics , thermoluminescence , quantum mechanics , composite material
Organic phosphorescence materials have received wide attention in bioimaging for bio‐low toxicity and large Stokes. Herein, a design strategy to achieve near‐infrared (NIR) excitation and emission of organic room‐temperature phosphorescence through two‐stage confinement supramolecular assembly is presented. Via supramolecular macrocyclic confinement, the host–guest complexes exhibit phosphorescence with two‐photon absorption (excitation wavelength up to 890 nm) and NIR emission (emission wavelength up to 800 nm) in aqueous solution, and further nano‐confinement assembly significantly strengthens phosphorescence. Moreover, the nano‐assemblies possess color‐tunable luminescence spanning from the visible to NIR regions under different excitation wavelengths. Intriguingly, the prepared water‐soluble assemblies maintain two‐photon absorption and multicolor luminescence in cells or vivo.