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Synthesis, tailoring and characterization of silica nanoparticles containing a highly stable ruthenium complex

机译：包含高度稳定的钌配合物的二氧化硅纳米粒子的合成，定制和表征

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This paper describes the synthesis and characterization of sol-gel silica nanoparticles (NPs) derived from tetraethoxysilane (TEOS) and from tetraethoxysilane and methyltriethoxysilane (TEOS-MTEOS) in which is encapsulated, an in-house synthesized, stable oxygen-sensitive ruthenium complex, ruthenium (II) (bis-2,2-bipyridyl)-2(4-carboxylphenyl) imidazo[4,5-f][1,10]phenanthroline. These NPs were characterized using dynamic light scattering, transmission electron microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy and Brunauer-Emmett-Teller analysis. The spherical, stable and monodispersed NPs have been prepared using the St?ber method. It was found that the addition of prehydrolyzed MTEOS-based sol prepared in an acidic environment to the reaction mixture containing TEOS NPs synthesized for 6 h produced material with increased porosity when compared to pure silica NPs. Oxygen sensitivity, stability, photobleaching and leaching have been characterized. The hybrid NPs exhibit enhanced O_2 sensitivity but a high degree of leaching when compared to pure silica NPs, which have minimum O_2 sensitivity and no leaching.
机译：本文描述了由四乙氧基硅烷（TEOS）以及四乙氧基硅烷和甲基三乙氧基硅烷（TEOS-MTEOS）衍生而来的溶胶-凝胶二氧化硅纳米粒子（NP）的合成和表征，该纳米粒子被封装在内部，是一种内部合成的，稳定的对氧敏感的钌配合物，钌（II）（双-2,2-联吡啶基）-2（4-羧基苯基）咪唑并[4,5-f] [1,10]菲咯啉。使用动态光散射，透射电子显微镜，扫描电子显微镜，傅立叶变换红外光谱和Brunauer-Emmett-Teller分析对这些NP进行表征。球形，稳定且单分散的NP已使用St？ber方法制备。发现在酸性环境中制备的预水解基于MTEOS的溶胶添加到含有TEOS NP的反应混合物中，合成时间为6小时，与纯二氧化硅NPs相比，其孔隙率增加。氧敏感性，稳定性，光漂白和浸出已被表征。与纯二氧化硅NPs相比，杂化NP表现出增强的O_2敏感性，但具有高度的浸出性，而纯二氧化硅NPs具有最低的O_2敏感性且无浸出。

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