Abstract Nanostructured silica hybrid materials have been synthesized via soft chemistry way, by the incorporation of functional 1,2,4-triazole components into a silica network, using a perhydropolysilazane (PHPS) as a silica source and 1,2,4-triazole components as templates. The compositions, morphological and textural properties of the as-synthesized samples have been studied by 13C and 29Si CP MAS NMR, FTIR and SEM. The spectroscopy results suggest that the organic moieties have been chemically linked to the silica skeleton leading to hybrid materials in which Si–N, Si–O and Si–S bridges are created. Nitrogen adsorption-desorption analysis (BET) shows that the surface area varied between 385 and 425 m2 g−1. The 29Si CP-MAS NMR displays signals between -70 and -120 ppm corresponding to Q2, Q3 and Q4 units. The optical properties have been studied also by UV–visible diffuse reflection spectroscopy and photoluminescence (PL). This study reveals that the direct gap energies varied between 0.71 and 2.53 eV. Photoluminescence shows that the silica nanohybrids are suitable to the emission of blue light with wavelength (λem) values of about 470-480 nm. The PL emission results also from some silicon/oxygen-related defect species.

中文翻译：

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通过软化学从全氢聚硅氮烷/1,2,4-三唑前体获得纳米结构二氧化硅杂化材料的合成、表征和光学性能

摘要 通过软化学方法合成了纳米结构的二氧化硅杂化材料，将功能性 1,2,4-三唑组分结合到二氧化硅网络中，使用全氢聚硅氮烷 (PHPS) 作为二氧化硅源和 1,2,4-三唑组分。作为模板。通过 13C 和 29Si CP MAS NMR、FTIR 和 SEM 研究了合成样品的组成、形态和质地特性。光谱结果表明有机部分已与二氧化硅骨架化学连接，从而形成了混合材料，其中产生了 Si-N、Si-O 和 Si-S 桥。氮吸附-解吸分析 (BET) 显示表面积在 385 和 425 m2 g-1 之间变化。29Si CP-MAS NMR 显示的信号介于 -70 和 -120 ppm 之间，对应于 Q2、Q3 和 Q4 单位。还通过紫外-可见漫反射光谱和光致发光 (PL) 研究了光学特性。这项研究表明，直接间隙能量在 0.71 到 2.53 eV 之间变化。光致发光表明二氧化硅纳米杂化物适合发射波长 (λem) 值约为 470-480 nm 的蓝光。PL 发射也是由一些与硅/氧相关的缺陷种类引起的。