三元异质结构Ag-Bi2MoO6/BiPO4光催化剂高效降解苯酚红

多组分复合体系有利于电荷的有效分离,减少电子空穴对的复合几率。通过低温液相法首次合成Ag-Bi₂MoO₆/BiPO₄三元异质结构光催化剂。利用XRD、SEM、EDX及XPS等技术对样品进行了表征。结果表明,Ag纳米粒子光照积累在Bi₂MoO₆/BiPO₄的表面,通过表面等离子共振增加对可见光的吸收,同时作为电子受体促进了光生电子的转移。Ag、BiPO₄和Bi₂MoO₆形成三元异质结构有效地抑制了光生电子空穴对的复合。Ag-Bi₂MoO₆/BiPO₄表现出优异的光催化性能,其光催化活性较BiPO₄、Bi₂MoO₆和Bi₂MoO₆/BiPO₄样品有较大提高。并且对Ag-Bi₂MoO₆/BiPO₄三元异质结构的光催化机制进行了讨论。光催化过程中反应活性物种捕获实验结果表明h⁺和O₂^·-是主要的活性基团.     

一种新型Ag3PO4/Ag/Ag2Mo2O7纳米线光催化剂：三元纳米复合物的光催化活性

Ag₃PO₄/Ag/Ag₂Mo₂O₇ composite photocatalyst was successfully prepared via an in situ precipitation method. The as-prepared Ag₃PO₄/Ag/Ag₂Mo₂O₇ nanocomposite included Ag₃PO₄ nanoparticles (NPs) as well as Ag NPs assembling on the surface of Ag₂Mo₂O₇ nanowires. Under visible light irradiation (λ>420 nm), the Ag₃PO₄/Ag/Ag₂Mo₂O₇ composite degraded rhodamine B (Rh B) efficiently and showed much higher photocatalytic efficiency than pure Ag₃PO₄, Ag₂Mo₂O₇, or Ag₃PO₄/Ag₂Mo₂O₇. It was elucidated that the excellent photocatalytic performance of Ag₃PO₄/Ag/Ag₂Mo₂O₇ for the degradation of Rh B under visible light could be ascribed to the high specific surface area, the extended absorption in the visible light region resulting from the Ag₃PO₄/Ag loading, and the efficient separation of photogenerated electrons and holes through the ternary heterostrucure composed of Ag₃PO₄, Ag and Ag₂Mo₂O₇.     

基于Re(Ⅰ)配合物有机电致发光器件的研究进展

Re(Ⅰ)配合物能够产生较好的自旋轨道耦合,其内量子效率在理论上可以达到100%,比荧光材料高3倍。因其具有相对短的激发态寿命、室温下高的磷光量子效率、较好的热稳定性和化学稳定性等优点使其被广泛关注。文章对Re(Ⅰ)配合物在有机电致发光器件中的研究进展进行了综述,并对Re(Ⅰ)配合物分子设计与电致发光器件的发展前景进行了展望。     

基于2-苯基-1H-1,3,7,8-四-氮杂环戊二烯并[l]菲的Pb(Ⅱ)、Co(Ⅱ)配合物的晶体结构与发光（英文）

采用水热法合成2种配合物[Pb2(ptcp)2(DDA)](NO3)2·2H2O(1)和[Co(ptcp)2(DDA)(H2O)]·0.5H2DDA·H2O(2)(ptcp=2-苯基-1H-1,3,7,8-四-氮杂环戊二烯并[l]菲,H2DDA=1,12-十二烷二酸),并采用单晶X-射线衍射、元素分析、红外光谱、X-射线粉末衍射和理论计算对其进行了结构表征。配合物1和2分别呈现双核和单核结构,通过π-π和氢键作用形成二维和三维结构。此外,配合物1具有较好的发光性质。利用Gaussian09W程序,采用B3LYP/LANL2DZ方法对配合物1进行自然键轨道(NBO)分析。结果表明配位原子与Pb(Ⅱ)离子之间存在明显的共价相互作用。     

基于1,10-邻菲罗啉衍生物为受体的有机紫外光探测器性能的研究

合成了三种1,10-邻菲罗啉苯并咪唑衍生物,即2-苯基(4-溴)-咪唑[4,5-Q[1,10]-邻菲罗啉(A1),2-苯基(4-甲氧基)咪唑[4,5-f][1,10]-邻菲罗啉(A2)和2-苯基(4-甲基)-咪唑[4,5-f][1,10]-邻菲罗啉(A3).通过核磁和红外进行了结构表征,并开展了光物理和化学特性测试.以m-MTDATA为给体,1,10-邻菲罗啉衍生物为受体制备了有机紫外光探测器件.在光强为1.2 mW/cm2的365 nm紫外光照射下,基于器件结构为ITO/m-MTDATA/m-MTDATA:A3/A3/LiF/Al的优化器件在-10 V时的最大光电流密度为89 μA/cm2.根据材料性质和器件结构讨论了器件性能的变化.     

水相识别分子印迹聚合物在样品预处理中的应用

分子印迹聚合物(MIPs)是模拟抗原-抗体识别机制,人工构筑的对目标物具有专一识别性的材料,构建具有优异水相识别能力的MIPs是分子印迹领域长期面临的挑战。近年来水相识别MIPs以其优异的抗基质干扰和水中识别能力,引起了分析化学家、材料学家和环境学家的广泛关注。本文综述了近年来水相识别MIPs在样品预处理中的应用研究。首先,简要介绍了MIPs的构筑原理、优势及面临水相识别困难的挑战。其次,介绍了样品前处理技术及其重要性。再次,结合各类新兴材料和MIPs制备技术,从样品前处理技术的角度(包括固相萃取、分散固相萃取、磁固相萃取、固相微萃取、管尖固相萃取和搅拌棒吸附萃取)全面总结了水相识别MIPs在含水样品分析中的应用,并结合材料性能和分析参数讨论了各类方法的分析优势。最后,分别从水相识别MIPs构建和预处理两方面提出了该领域面临的挑战和未来的发展趋势。     

一维链状配位聚合物{[Pb(PTCP)(2,5-pydc)]_2·H_2O}_n的水热合成、晶体结构和发光性质研究(英文)

A new metal-organic coordination compound framework formulated {[Pb(PTCP)(2,5-pydc)]2·H2O}n (1) (PTCP=2-phenyl-1H-1,3,7,8-tetraazacyclopenta[l]-phenanthrene, H2pydc=pyridine-2,5-dicarboxylic acid) has been prepared in the hydrothermal condition and characterized by single-crystal X-ray diffraction, elemental analysis, IR and TG. It crystallizes in monoclinic, space group C2/c with a=2.129 2(4) nm, b=1.111 2(2) nm, c=2.049 4(4) nm, β=105.02(3)°, V=4.683 2(16) nm3, Z=4, Pb2C52H32N10O9, Mr=1 355.26, Dc=1.922 g·cm-3, F(000)=2 600, S= 0.825, R1=0.056 2 and wR2=0.168 9. In the crystal, the Pb atom is five-coordinated by three N and two O atoms. The complex forms a one-dimensional zigzag polymeric chain along the b axis which is stacked to furnish a two- dimensional supramolecular layer structure via aromatic π-π interactions in the ab plane. In addition, hydrogen bonds are observed in the compound which play an important role in forming the final structure. Solid-state fluorescence spectrum of 1 exhibits the maximum emission peak at 621 nm.     

A Fe(Ⅱ) Coordination Polymer Based on 1,10-Phenanthroline Derivative and Oxalic Acid:Synthesis,Structure,and Properties

A Fe-based coordination polymer,[Fe(C₂O_4)_0.5(4-NCP)]_n·2nH₂O (1,4-HNCP=2-(4-carboxyphenyl)-1H-imidazo(4,5-f)-(1,10)phenanthroline,H₂C₂O₄=oxalic acid),was hydrothermally synthesized and characterized by infrared spectrum,elemental analysis,single-crystal X-ray diffraction,power X-ray diffraction,and UV-vis absorption spectrum.Structural analyses reveal that polymer 1 possesses a (4,4)-connected 2D network.In addition,1 shows photocatalytic activity toward the degradation of rhodamine B (RhB) in the presence of H₂O₂ under visible light illumination.     

基于1,10-邻菲罗啉-5,6-二酮和Keggin型多金属氧化物的化合物的水热合成及性质

在水热条件下,用1,10-邻菲罗啉-5,6-二酮(Do)作为中性配体合成了3个基于Keggin型多金属氧化物的化合物(HDo)₆(PW₁₂O₄₀)₂·H₂O(1),[Cu(Do)₂(H₂O)]₂[Cu(Do)₂(PW₁₂O₄₀)(H₂O)](PW₁₂O₄₀)(2)和[Pb(Do)₂(PW₁₂O₄₀)](HDo)(3),并对其进行了元素分析、红外光谱、电感耦合等离子体分析、Ｘ射线光电子能谱、热重分析以及荧光光谱等表征。单晶X射线衍射分析表明化合物1和2为零维结构,化合物3是一维链状结构。     

含Sc(DBM)3bath的有机发光二极管的界面激基复合物发光

报道了一种含Sc(DBM)3bath的有机发光二极管(OLED)的界面激基复合物发光,器件结构为ITO/TPD/Sc(DBM)3bath/LiF/Al,其中TPD和Sc(DBM)3bath分别为空穴和电子传输材料。这种电致发光(EL)发射主峰位于597nm,最高亮度接近200cd/m2,这种发射来自于TPD和Sc(DBM)3bath界面处两个功能层的相互作用产生的激基复合物。同时该LED在紫外光照射下还表现出明显的光伏特性。