期刊
JOURNAL OF MATERIALS CHEMISTRY B
卷 5, 期 15, 页码 2757-2762出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7tb00156h
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资金
- National Basic Research Program of China (973 Program) [2013CB834704]
- National Hi-Tech Research and Development Program of China (863 Program) [2015AA020515]
- Zhejiang Provincial Natural Science Foundation of China [LR17F050001]
- National Natural Science Foundation of China [61275190]
- Program of Zhejiang Leading Team of Science and Technology Innovation [2010R50007]
Three-photon luminescence (3PL) imaging with near-infrared (NIR) excitation is quite promising for its deep penetration, high resolution, and good signal-to-noise ratio (SNR). In this report, a type of red emissive fluorophore TPEPT with aggregation-induced emission (AIE) properties was synthesized, and it was found to possess a large three-photon absorption (3PA) cross-section of 6.33 x 10 (-78) cm(6) s(2) under 1550 nm femtosecond laser excitation. TPEPT was then encapsulated with mPEG(5000)-DSPE to form AIE nanoparticles, and the chemical stability, optical properties and toxicity were studied afterwards. TPEPT nanoparticles were then applied for 3PL in vivo vascular imaging of mouse brain under 1550 nm fs laser excitation, and a fine three-dimensional (3D) reconstruction with a depth of 500 mu m was achieved.
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