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On the synthesis and characterisation of luminescent hybrid particles: Mo-6 metal cluster complex/SiO2

机译:发光杂交颗粒的合成与表征:Mo-6金属簇复合物/ SiO2

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摘要

Photoluminescent silica-based materials are used in applications in photonics, sensing, and biological and medical sciences. Specifically, hybrid particles based on silica doped by photoluminescent octahedral molybdenum metal cluster complexes are inexpensive and readily available via the Stober process and thus are promising materials for diverse applications. We evaluated design of photoluminescent materials based on silica and {Mo6X8}(4+) clusters (where X = Cl, Br, I), including how synthesis conditions (chemical composition of metal cluster precursors (Bu4N)(2)[{Mo6X8}(NO3)(6)], loading of the precursor and presence of a surfactant) influence key parameters of the final materials, such as phase composition, size and morphology of the particles and photophysical characteristics. Our study revealed that hydrolysis of the molybdenum cluster precursors during the Stober process strongly affects both morphology and photophysical parameters of the materials, especially at high loadings. At relatively low loadings of the precursors, materials doped by {Mo6I8}(4+) clusters demonstrated the most promising set of properties-the highest photoluminescence quantum yields and efficient singlet oxygen generation-while particle size and morphology remained the same as for undoped SiO2 materials.
机译:光致发光的二氧化硅基材料用于光子,传感和生物学和医学科学的应用中。具体地,基于光致发光八面体钼金属簇复合物掺杂的二氧化硅的杂化颗粒是便宜的,并且通过达尔的工艺易于获得,因此是具有不同应用的有希望的材料。我们评估了基于二氧化硅和{MO6X8}(4+)簇的光致发光材料的设计(其中X = Cl,B,I),包括合成条件如何(金属簇前体的化学成分(Bu4N)(2)[{Mo6x8}) (NO 3)(6)],装载前体和表面活性剂的存在)影响最终材料的关键参数,例如相成分,颗粒的相位,尺寸和形态和光性特征。我们的研究表明,旱冶钼过程中钼簇前体的水解强烈影响材料的形态和光物理参数,尤其是在高载荷处。在前体的相对低的负荷下,由{mo6i8}(4 +)簇掺杂的材料证明了最有前景的性质 - 最高的光致发光量子产量和有效的单线次氧产生 - 而粒度和形态仍然与未掺杂的SiO2相同材料。

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  • 来源
    《RSC Advances》 |2016年第49期|共9页
  • 作者单位

    Nikolaev Inst Inorgan Chem SB RAS 3 Acad Lavrentiev Ave Novosibirsk 630090 Russia;

    Univ Hull Dept Chem Kingston Upon Hull HU6 7RX N Humberside England;

    Nikolaev Inst Inorgan Chem SB RAS 3 Acad Lavrentiev Ave Novosibirsk 630090 Russia;

    Nikolaev Inst Inorgan Chem SB RAS 3 Acad Lavrentiev Ave Novosibirsk 630090 Russia;

    Sci Inst Clin &

    Expt Lymphol 2 Timakova St Novosibirsk 630060 Russia;

    Nikolaev Inst Inorgan Chem SB RAS 3 Acad Lavrentiev Ave Novosibirsk 630090 Russia;

    Nikolaev Inst Inorgan Chem SB RAS 3 Acad Lavrentiev Ave Novosibirsk 630090 Russia;

    Hokkaido Univ Dept Chem Fac Sci Sapporo Hokkaido 0600810 Japan;

    Nikolaev Inst Inorgan Chem SB RAS 3 Acad Lavrentiev Ave Novosibirsk 630090 Russia;

    Nikolaev Inst Inorgan Chem SB RAS 3 Acad Lavrentiev Ave Novosibirsk 630090 Russia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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