杂化二氧化硅中贵金属的溶胶-凝胶包封：分子层面的见解。
The sol-gel entrapment of noble metals in hybrid silicas: a molecular insight.
作者信息
Fidalgo Alexandra, Ciriminna Rosaria, Lopes Luís, Pandarus Valerica, Béland François, Ilharco Laura M, Pagliaro Mario
机构信息
Centro de Química-Física Molecular and IN - Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Complexo I, Av, Rovisco Pais 1, Lisboa 1049-001, Portugal.
出版信息
Chem Cent J. 2013 Sep 30;7(1):161. doi: 10.1186/1752-153X-7-161.
BACKGROUND
Why are metal nanoparticles sol-gel entrapped in ORMOSIL so active and stable? In other words, why ORMOSIL-entrapped metal nanoparticles are more active and selective than many heterogenized counterparts, including silica-entrapped noble metals?
RESULTS
Unveiling specific interactions between MNPs and the molecular structure of ORMOSIL, this work investigates subtle structural aspects through DRIFT spectroscopy.
CONCLUSIONS
The results point to interactions between entrapped Pd and Pt nanocrystallites with the organosilica sol-gel cages similar to those taking place in enzymes.
背景
为什么金属纳米颗粒通过溶胶 - 凝胶法包裹在有机硅玻璃（ORMOSIL）中会如此具有活性和稳定性？换句话说，为什么包裹在ORMOSIL中的金属纳米颗粒比许多包括包裹在二氧化硅中的贵金属在内的多相化对应物更具活性和选择性？
结果
通过揭示金属纳米颗粒（MNPs）与ORMOSIL分子结构之间的特定相互作用，本研究通过漫反射红外傅里叶变换光谱（DRIFT）研究了细微的结构方面。
结论
结果表明，包裹的钯和铂纳米微晶与有机硅溶胶 - 凝胶笼之间的相互作用类似于酶中的相互作用。
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