一种新型黄色荧光类水滑石复合物的制备及表征

Preparation and Characterization of a Yellow-fluorescent Hydrotalcite-like Composite

用适量的Zn(Ⅱ)取代镁铝水滑石中的Mg(Ⅱ),同时将一定量的2-对联苯基-8-羟基喹啉分散到类水滑石层间的亲油性阴离子中,使其与层板表面上的Zn(Ⅱ)配位,用一步法合成、组装得到一类新型黄色荧光类水滑石复合物(Zn-(HQ-4-biPh)-HTlc)。采用荧光光谱、红外光谱、X射线衍射、扫描电子显微镜和热分析等对其进行了表征。研究结果表明,Zn-(HQ-4-biPh)-HTlc在蓝光(481 nm)激发下可发出黄色荧光(554 nm),与其相应的含锌配合物(Zn[2-(p-biph)-8-Q-O]2)相比,不仅可节省配体用量,而且具有更高的发光强度和更好的热稳定性,有望在白光LED等光电领域得到应用。

A yellow-fluorescent hydrotalcite-like （HTIc） composite, Zn- （HQ-4-biPh） -HTlc, was prepared by a one-pot synthesis. In this composite, the magnesium （ Ⅱ ） was partially replaced by zinc （ Ⅱ ） in the hydrotalcite-like layers and 2-biphenyl-4＇-yl-8-quinolinolato was dispersed into the anions among the interlayer region to coordinate the zinc （ Ⅱ ） ion through its oxygen and nitrogen atoms. The structure, morphology, and optical properties of the composite were characterized by X-ray diffraction （XRD）, scanning electron microscopy （ SEM ）, FT-IR spectroscopy, thermogravimetry （TG） and photoluminescence （PL）. Compared with Zn [2-（p-biph）-8-Q-OJ2, the resultant composite Zn-（ HQ-4-biPh ）-HT1c exhibits much stronger fluorescence and higher thermal stability, although the contents of metals and ligands were decreased greatly. Thus, Zn-（HQ-4-biPh）-HTlc is a promising yellow-fluorescent material for applications in the photoelectronic area.