2,4-二氯苯氧乙酸构筑的双核镉(Ⅱ)配合物的合成、晶体结构、荧光和电化学性质(英文)

<正>The study of carboxyl complexes has drawn great interests,mainly because of their intriguing variety of architectures and topologies as well as potential applications in many fields,such as functional materials,biochemistry,medicine,and so on     

溶胶-凝胶法制备Tb-PDA/PVA薄膜及其荧光性能

采用溶胶-凝胶法制备了铽(Ⅲ)-吡啶-2,6-二羧酸/聚乙烯醇(Tb-PDA/PVA)发光薄膜,其结构经IR,差热分析,原子力显微镜及荧光光谱表征.分析结果表明:薄膜表面平整,PVA中的纳米Tb-PDA(平均粒径为90 nm)分散均匀,在270 ℃以下具有良好的热稳定性.在紫外光照射下,薄膜发出较强的绿色荧光,最大发射峰位于544 nm,归属于Tb3+的5D4→7F5跃迁.     

Synthesis, structure, and magnetic properties of two novel lanthanide-organic frameworks

Two novel metal-organic frameworks, {[Eu(phen)(NDA)1.5(H2O)]}n ((1); NDA = 2,6-naphthalenedicarboxylate ions, phen = 1,10-phenanthroline) and {[Gd(phen)(NDA)1.5]·0.5H2NDA}n (2), have been synthesized under hydrothermal conditions. The structure analyses of 1 and 2 reveal that the two compounds belong to the triclinic system with space group P-1. Compound 1 features a 2D lattice structure while compound 2 displays a novel 3D architecture. The two frameworks were further characterized by elemental analyses, l...     

混合配体镍配合物[Ni（NCS）2（phen）2]的合成、晶体结构及荧光性质

合成了含异硫氰酸根和邻菲咯啉（phen）混合配体的镍配合物[Ni（NCS）2（phen）2],通过红外光谱、紫外光谱和X射线单晶衍射等手段对其结构进行了表征.研究了配合物的固体荧光光谱.单晶结构解析结果表明,标题化合物属于正交晶系,Pbcn空间群,晶胞参数为：a=1.296 2（2）nm,b=1.019 0（1）nm,c=1.759 5（2）nm,V=2.323 9（4）nm3,Z=4,Dc=1.530 g/cm3,μ=1.043 mm-1,F（000）=1 096,R1=0.042 1,wR2=0.108 1.配合物中镍离子采用6配位的八面体配位构型,晶体堆积中通过π-π作用形成一维超分子结构.     

具有一维孔道的配位聚合物[{NaCd4(IDC)3(prz)}·3H2O]n的合成、晶体结构及性质研究

通过水热方法,采用H3IDC(H3IDC=imidazole-4,5-dicarboxylic acid)、prz(prz=piperazine)与Cd(NO3)2·4H2O反应,合成了具有一维孔道的配位聚合物[{NaCd4(IDC)3(prz)}·3H2O]n(1),并对其结构和荧光性质进行了研究.结构分析结果表明该化合物属于单斜晶系,Cc空间群.其结构单元中含有4个独立的Cd原子.3个Cd原子形成一个小环,6个Cd原子形成一个大环.这些环通过IDC<'3->和Cd(Ⅱ)的配位作用,进一步连接产生了含一维孔道的配位聚合物.孔道内含有大量水分子和Na+离子.研究表明,该配合物在室温下能发出很强的兰色荧光.     

Universal Scaffold for Fluorescent Conjugated Organoborane Polymers

Pimp my polymer : A new versatile and strongly emissive conjugated polymer scaffold results when nucleophiles replace the labile bromine atoms on the fluorenylborane polymer backbone (see picture). Such modification allows facile tuning of the stability, thermal characteristics, and photophysical behavior of a diverse range of luminescent polymers with interesting optoelectronic properties and anion‐binding behavior.

     

稀土/L型沸石主-客体发光功能材料的研究进展

沸石微孔晶体材料作为客体功能物种的主体材料在主-客体组装化学中发挥着越来越重要的作用,在微型激光器、非线性光学、生物成像、光放大及光显示等高技术领域已显示出广阔、诱人的发展前景.本文介绍国内外,特别是河北工业大学在稀土/L型沸石主-客体杂化功能材料的组装、结构及其发光性能的研究工作,具体包括：稀土有机配合物在L沸石孔道内的组装、L型沸石-有机高分子透明杂化发光材料的制备及稀土有机配合物诱导控制的L型沸石自组装等.此外,本文对稀土/L型沸石主-客体杂化发光功能材料的研究进行了展望.     

纳米片自组装La2S3微晶的制备及其发光性能

以LaCl3.7H2O和Na2S2O3.5H2O为前驱物,采用微波水热法制备La2S3微晶,研究了溶液pH值对产物相组成及显微结构的影响。采用X射线衍射(XRD)、扫描电子显微镜(SEM)、紫外-可见吸收光谱(UV-vis)以及室温光致发光光谱(PL)对La2S3微晶进行了表征。结果表明:在溶液pH值为3～8时,产物物相为β-La2S3;La2S3微晶为由纳米片自组装的结构;所制备的La2S3微晶具有较强的紫外吸收特性;La2S3微晶在紫外光的激发下有较好的蓝绿光发射性能。     

Determination of Trace Bismuth by a Solid Substrate Room Temperature Phosphorescence Quenching Method Based on Anionic Polymeric Acryclic Acid Lead Particles Containing Luminescent Eosine Molecules

Abstract

Luminescent particles of Anionic Polymeric Acryclic Acid Lead (Pb(PAA)₂) which containing eosine(HFInBr₄), Eosine nanomicroball of anionic polypropylene acid lead contained luminophores (short for E.N.PAA.L.C.L), were synthesized by a sol‐gel method, using anionic polymeric acryclic acid sodium (PAANa) as the precursor and Pb²⁺ as the precipitant. NH₄Ac‐HAc can react with the Pb²⁺ in E.N.PAA.L.C.L, causing it to decompose into aqueous soluble components. E.N.PAA.L.C.L‐ NH₄Ac‐HAc can emit strong and stable solid substrate room temperature phosphorescence (SS‐RTP) on filter paper, and bismuth, mercury or iodine can cause a decrease in phosphorescence intensity. Based on the facts above, a new method for the determination of trace bismuth by an SS‐RTP quenching method was established. The linear range of this method was 0.01–0.20(pg spot^?1) (4.0×10^?12 g ml^?1) of Bi³⁺, with a detection limit (LD) of 0.0016 pg spot^?1, and the regression equation of the working curve was ΔIp=61.01+237.8 m_Bi3+ (pg spot^?1), r=0.9992. This method was applied to the determination of trace bismuth in human hair and well water samples with satisfactory results. The mechanism of SS‐RTP emission was also discussed.     

铽配合物——蒙脱土新型复合发光材料的插层组装、表征和发光性能

合成了铽的配合物[TbL] (ClO₄)₃(L: 2, 2, 2', 2'-四[N-苯基-N-苄基(乙酰胺)-2-氧甲基]丁醚), 通过离子交换反应将配离子[TbL]³⁺插层组装到蒙脱土(MMT)层板间, 制备出了新型复合发光材料 [TbL]³⁺-MMT．用元素分析、X射线衍射、傅氏变换红外光谱和紫外-可见光谱对材料进行了表征, 对其荧光性质进行了研究．结果表明, 复合发光材料保持了蒙脱土良好的层柱结构特征和[TbL]³⁺离子的笼状结构特征, [TbL]³⁺离子以单层形式分布于蒙脱土层板间．在紫外光激发下, 复合发光材料发出较强的绿色荧光, 其发射光谱与相应配合物的发射光谱相似．与相应纯配合物比较, 复合发光材料单位质量Tb³⁺的相对荧光强度、荧光单色性和光稳定性有显著改善, 其激发波长向可见光区发生明显位移, 说明插层组装对相应配合物的激发波长有一定的调制作用.