Synthesis,Characterization, and Luminescence Properties of a Multi-benzoic Acid Rare Earth Complex Applied to Fluorescence Nanometer and Micrometer Fiber

The design and synthesis of a novel multi-benzoic acid ligand and the luminescence properties of the rare earth complex with the ligand and Eu3 ＋were focused on. The composition and structure of ligand and complex were characterized by Fourier transform infrared（ FT-IR） spectroscopy,1H nuclear magnetic resonance（1H NMR） techniques, and element analysis. The luminescent properties,heat resistant performance,morphology and distribution in fibers of the complex were also measured. The fluorescent spectra indicate that as-synthesized complex owns excellent luminescent properties. The maximum relative fluorescence intensity of the complex is more than 7 000. The thermo-gravimetric analysis（ TGA） results confirm that the initial degradation temperature of as-synthesized complex is at 413 ℃. Transmission electron microscope（ TEM） and field-emission scanning electron microscope（ FESEM） photos show that the particle size of assynthesized complex is 50-60 nm,and can be uniformly distributed in fiber. Based on these results, it can be concluded that the synthesized complex has excellent luminescent properties, good thermal stability,and extensively application prospect.     

Preparation and luminescence properties of YeO3：Er^3＋/TiO2 with high specific surface area

The three composites Y2O3 :Er3+ , Y2O3 :Er3+ /Yb 3+ andY2O3 :Er3+ /TiO2 were prepared using coprecipitation and sol-gel techniques. Their morphology, specific surface area, porosity, UV-vis. absorption spectra and fluorescence spectra were measured using SEM, TEM, surface analysis, UV-vis. absorption and photoluminescence spectrophotometry. SEM and TEM showed that samples prepared using coprecipitation were dispersed, while Y2O3 :Er3+ /TiO2 particles possessed a mesoporous surface and average diameter of ab...     

BaNb2O6:Eu3+,Bi3+荧光粉的制备及发光性质研究

采用传统的固相法制备了BaNb2O6:Eu3+荧光粉,对其晶体结构、形貌和发光性质进行了X-射线衍射(XRD)、扫描电镜(SEM)和荧光光谱(PL)表征.结果表明,经1 200°C烧结后可得到BaNb2O6纯相;BaNb2O6:Eu3+荧光粉的颗粒大小分布较均匀,粒径大约为1～3μm;Ba1-xNb2O)6:Eu3+x...     

金属氧化物纳米晶体的表面结构控制及功能调控的研究进展

晶体具有各向异性,不同晶面上的原子排布、成键方式等都不尽相同,从而导致各种晶面的物理和化学性质的差异,因此通过控制裸露晶面就可以调控晶态材料(特别是微纳米晶态材料)的相关性质.近年来,关于微纳米晶体的表面结构控制的研究已成为纳米材料的一个研究热点.在文中,首先简要回顾国际上在该领域研究的情况,然后着重介绍了在部分金属氧化物微纳米晶体的表面结构控制方面的相关研究进展.     

溶胶凝胶法制备稀土发光杂化材料的研究

根据杂化材料无机/有机组分间化学键作用的强弱,可以将杂化材料分为第Ⅰ类杂化材料(组分间通过氢键、范德华力等弱键相结合)和第Ⅱ类杂化材料(组分间以共价键相结合).其中第Ⅱ类杂化材料由于具有更高的热稳定性、发光强度以及均一性等许多优点而成为研究的热点.本文综述了近年来溶胶凝胶法制备Ⅰ、Ⅱ两种类型稀土发光杂化材料的研究进展,相比其它制备方法,溶胶凝胶法有很大的优势,所需反应温度低、制得的材料化学均匀性好以及纯度高,因而该方法有望在制备杂化材料方面得到广泛的应用.     

气体放电中几种四边形斑图的发光特性

采用双水电极装置,在大气压下介质阻挡放电系统中得到了3种不同的四边形斑图,为了明析它们的区别,对其中放电单元的发光特性进行了研究.结果表明:随着电压的升高,构成斑图的放电单元面积变大,其光信号经历了每电压半周期1次到2次再到多次的变化过程.分析表明,壁电荷在其中起到了重要的作用.     

多孔硅的形成和发光

概述了多孔硅的制备方法,同时提出了对双槽法的改进方法。阐述了多孔硅的形成机理和发光机理的各种模型,同时对多孔硅的研究前景作了展望。     

固体表面化学发光法测定辣根过氧化物酶的研究

在不渗透阻挡滤纸上，建立了Ｌｕｍｉｎｏｌ－Ｈ２Ｏ２－ＨＲＰ固体表面化学发光分析法．游离ＨＲＰ测定的线性范围为６～８０００ｐｇ，检测限为０．６６ｐｇ／斑点，测定的相对标准偏差为７．４％（８ｐｇＨＲＰ，ｎ＝１１）．对标记的ＨＲＰ测定结果与ＥＬＩＳＡ法相一致．     

Tb3+掺杂莫来石的合成及发光性能研究

采用溶胶-凝胶法合成了不同Tb3 掺杂比例的莫来石发光材料，经XRD结构分析表明，材料为Al6-xTbxSi2O13固溶体(x=0．02～0．12)，随着Tb3 掺杂量的增加，材料的晶格有膨胀的趋势，通过材料的激发和发射光谱研究，确定了材料的最佳组成。     

Fluorescence quenching effect of metal ions for α,α''''-diamine containing conjugated polymers in solid films

The fluorescence quenching effect of the conjugated polymers P1 and P2 (the molecular recognitions are twisted 2,2'-bipyridine (bpy) and planar 1,10-phenanthrolin (phen), respectively) films upon the addition of metal ions has been studied. And the results showed that P2 exhibited stronger fluorescence quenching ability upon the addition of both transition metal ions and main group metal ions compared with that of P1. The 20° twist angle between the two consecutive pyridine rings of bpy unit in the P1 main chain is the reason for the weaker fluorescence quenching ability compared with P2, in which the planar phen unit can chelate with metal ions relatively freely without the conformational transition. So P2 is a kind of material with better properties for solid film devices, such as sensors for metal ions recognition.