Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 58, Issue 25, Pages 8536-8540Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201904534
Keywords
cross-relaxation; dyes; pigments; electronic structure; nanostructures; photothermal agents
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Funding
- NTU internal grant [M4081851]
- National Basic Research Program of China [61805118, 21674048]
- Natural Science Foundation of Jiangsu Province of China [BK20171020]
- China Postdoctoral Science Foundation [2018T110488]
- open research fund of the Key Laboratory for Organic Electronics and Information Displays
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Cross-relaxation among sensitizers is commonly regarded as deleterious in fluorescent materials, although favorable in photothermal agents. Herein, we coated Prussian blue (PB) on NaNdF4 nanoparticles to fabricate core-shell nanocomplexes with new cross relaxation pathways between the ladder-like energy levels of Nd3+ ions and continuous energy band of PB. The photothermal conversion efficiency was improved exceptionally and the mechanism of the enhanced photothermal effect was investigated. Invivo photoacoustic imaging and photothermal therapy demonstrated the potential of the enhanced photothermal agents. Moreover, the concept of generating new cross-relaxation pathways between different materials is proposed to contribute to the design of all kinds of enhanced photothermal agents.
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