Imparting tunable and white-light luminescence to a nanosized metal-organic framework by controlled encapsulation of lanthanide cations.
Imparting tunable and white-light luminescence to a nanosized metal-organic framework by controlled encapsulation of lanthanide cations.
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DOI：
10.1021/ic402900x
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发表时间：
2014-03
影响因子：
4.6
通讯作者：
You Zhou;B. Yan
中科院分区：
文献类型：
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作者：
You Zhou;B. Yan
另一种方法是通过将镧系元素 (III) (Ln(3+)) 阳离子封装到 Al-MIL-53-COOH (1) 纳米晶体的通道中来制造高发光 MOF 和白光发射器。该框架既可以作为主体又可以作为天线来保护和敏化Ln(3+)阳离子的发光。通过 PXRD、TEM、FTIR、TGA 和 N2 吸附测量来确定所得产品的结构、热稳定性和 BET 表面积。 Ln(3+)掺入的纳米晶在紫外光照射下表现出强发射性，并对其发光性能进行了系统研究。与基于镧系元素的 MOF 的基本不变的发光相比，Ln(3+) @1 的发光允许设计和调节。多功能的发光性、良好的热稳定性、纳米尺寸以及与水性条件的兼容性表明这些材料可能在 LED 灯、条形码材料和生物传感器中具有潜在的应用。此外，通过化学溶液沉积（CSD）从其亚稳定胶体溶液中制备了Ln(3+)@1薄膜，这为诸如颗粒和蒸汽传感器等实际应用开辟了道路。
An alternative way was demonstrated to fabricate highly luminescent MOFs and white-light emitter by encapsulating lanthanide(III) (Ln(3+)) cations into the channels of Al-MIL-53-COOH (1) nanocrystals. The framework can serve as both a host and an antenna for protecting and sensitizing the luminescence of the Ln(3+) cations. PXRD, TEM, FTIR, TGA, and N2 adsorption measurements were performed to determine the structure, thermal stability, and BET surface area of the obtained products. The Ln(3+)-incorporated nanocrystals show strong emission under UV-light irradiation, and their luminescent properties were systematically studied. In contrast to the essentially unchangeable luminescence of lanthanide-based MOF, the luminescence of Ln(3+) @1 allows design and tuning. The versatile luminescence, good thermal stability, nanometer size, and compatibility with aqueous condition reveal these materials may have potential applications in LED lamps, barcoded materials, and biological sensors. In addition, the thin films of Ln(3+)@1 were prepared by chemical solution deposition (CSD) from their metastabilized colloidal solutions, which open the way to practical applications such as pellets and sensors for vapors.