Yolk鈥揝hell Structured Mesoporous Nanoparticles with Thioether-Bridged Organosilica Frameworks

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• 作者：Zhaogang Teng ; Xiaodan Su ; Binghui Lee ; Chungui Huang ; Ying Liu ; Shouju Wang ; Jiang Wu ; Peng Xu ; Jia Sun ; Dengke Shen ; Wei Li ; Guangming Lu
• 刊名：Chemistry of Materials
• 出版年：2014
• 出版时间：October 28, 2014
• 年：2014
• 卷：26
• 期：20
• 页码：5980-5987
• 全文大小：543K
• ISSN：1520-5002

文摘

Organic functionalization and structural control of mesoporous materials are important for their applications. This study reports here that yolk鈥搒hell structured mesoporous nanoparticles with thioether-bridged organosilica frameworks can be successfully prepared by hydrothermal treatment of mesostructured organic鈥搃norganic hybrid nanospheres. The thioether-bridged yolk鈥搒hell nanoparticles have ultrahigh condensation degree, i.e., (T³+Q⁴)/(Qⁿ+T^m) = 94%, large surface area (400 m² g^鈥?), accessible ordered mesochannels (2.0 nm), large pore volume (0.67 cm³ g^鈥?), and uniform diameter (290鈥?0 nm), core size (180鈥?0 nm), and shell thickness (19鈥? nm). Thanks to the abundant thioether groups and the unique structure, the yolk鈥搒hell mesoporous nanoparticles can be used as nanoreactors to generate in situ polyhedral gold nanoparticles into their hollow spaces in a hot tetrachloride aurate aqueous solution. The gold loaded yolk鈥搒hell nanoparticles show two strong plasmon resonance bands at 577 and 633 nm with excellent photothermal efficiency. This shows a great potential for photothermal treatment. Furthermore, the thioether-bridged yolk鈥搒hell mesoporous nanoparticles exhibited excellent capability for convenient covalent connection of near-infrared dyes, which make them promising candidates for applications in cell and tumor imaging.