聚合漆酚-镍配合物的电化学合成与性质研究

探讨了漆酚 (EPU)的电化学聚合及其聚合漆酚 镍配合物 (EPU_Ni2 +)的制备 .采用X光电子能谱、红外光谱、动态机械热分析 (DMTA)、TG_DTA、原子发射光谱 (AES)等手段对配合物(EPU_Ni2 +进行表征 .AES结果表明 :镍含量达 7.5 % .由于存在着Ni2 +与EPU的配位作用 ,并引起进一步交联 ,从而提高了玻璃化转变温度和耐热性能     

电化学聚合漆酚稀土配合物的合成与表征

采用电化学方法合成的聚合漆酚(EPU)与三异丙氧基稀土Re(Pr,Nd,Eu)反应,生成稀土金属配合物(EPU-Re3+)。利用FT-IR、荧光光谱、XPS、DMTA、AES等手段对其表征,探讨其结构与性质。证明了配合物中存在着稀土金属离子Re3+与EPU的配位作用,并引起进一步的交联,因而难溶于绝大多数有机溶剂,而且其玻璃化转变温度和耐热性能均得到提高。     

聚丙烯酰胺-CuCl~2膜表面结构及对醋酸乙烯酯 聚合催化性能研究

根据IR,ESR,XPS和电导率的测试结果推定,在催化剂聚丙烯酰胺-CuCl~2膜表面上,1个Cu^2^+与聚丙烯酰胺4个链节单元配位,产生σ配位键而交联,形成疏水性的聚丙烯酰胺-Cu(Ⅱ)配位聚合物膜.从该膜的X射线光电子能谱中的Shake-up效应得知,膜表面的Cu^2^+具有高自旋态电子构型,其缺位处与醋酸乙烯酯,Na~2SO~3配位活化,并产生自由基氢,从而在室温Na~2SO~3水溶液体系(pH=7)中能催化引发醋酸乙烯酯按自由基加聚反应历程进行聚合,诱导期3min20s,得率75%。     

壳聚糖镍和壳聚糖镧配位聚合物的配位数研究

从ＩＲ、ＥＳＲ和ＸＰＳ的测试结果可知,Ｎｉ＾２＋或Ｌａ＾３＋与壳聚糖（ＣＳ）键节单元上的氨基Ｎ和仲羟基Ｏ发生配位反应,形成ＣＳ－Ｎｉ＾２＋或ＣＳ－Ｌａ＾３＋配位聚合物膜。通过电导率研究其配位数,发现Ｎｉ＾２＋或Ｌａ＾３＋可与壳聚糖的３个或５个键节单元配位。根据以上的实验可推定中心离子Ｎｉ＾２＋与壳聚糖３个键节单元上的氨基Ｎ和仲羟基Ｏ结合,形成六配位的ＣＳ－Ｎｉ配位聚合物Ｌａ＾３＋与壳聚糖５个键节单     

电化学聚合漆酚钴膜配位结构与催化性能研究

电化学方法合成的聚合漆酚 (EPU)通过与氯化钴的异丙醇溶液作用 ,生成聚合漆酚钴配合物膜(EPU Co3+ ) .采用红外光谱、XPS光电子能谱、DTA TG、动态机械热分析 (DMTA)以及原子发射光谱 (AES)等手段进行表征 ,确定其配位结构 ,即每个钴离子与EPU中两个链节单元的羟基发生配位而交联 ,因此玻璃化转变温度和耐热性能均得到提高 .实验表明 ,此配合物膜在室温下的Na2 SO3水体系 (pH =7)中能催化引发VAc的聚合     

Unusual Transformation from a Solvent‐Stabilized 1D Coordination Polymer to a Metal–Organic Framework (MOF)‐Like Cross‐Linked 3D Coordination Polymer

An unusual 1D‐to‐3D transformation of a coordination polymer based on organic linkers containing highly polar push–pull π‐conjugated side chains is reported. The coordination polymers are synthesized from zinc nitrate and an organic linker, namely, 2,5‐bis{4‐[1‐(4‐nitrophenyl)pyrrolidin‐2‐yl]butoxy}terephthalic acid, which possesses highly polar (4‐nitrophenyl)pyrrolidine groups, with high dipole moments of about 7 D. The coordination polymers exhibit an unusual transformation from a soluble, solvent‐stabilized 1D coordination polymer into an insoluble, metal–organic framework (MOF)‐like 3D coordination polymer. The coordination polymer exhibits good film‐forming ability, and the MOF‐like films are insoluble in conventional organic solvents.     

Cu(II)-脱乙酰壳聚糖配位聚合物的配位数

IR,ESR和XPS的测试结果表明,脱乙酰壳聚糖(简记CS)膜在铜氨水溶液浸渍过程中Cu(II)既与CS发生配位反应形成Cu(II)-CS配位聚合物,也产生吸附作用。ESR谱示出CuCl~2.2H~2O与Cu(II)-CS膜中的Cu(II)均含有一个单电子,可以利用XPS的Shake-up效应研究Cu(II)-CS配位聚合物的配位数,所得结果为4。又以同样的方法研究Cu(II)-聚乙烯醇(简记PVA)配位聚合物的配位数,发现Cu(II)是以低自旋状态的dsp^2杂化空轨道与PVA的羟基氧配位,其配位数也是4,这与资料所报道的一致,从而间接地验证了此方法研究Cu(II)-CS配位聚合物配位数的可靠性。     

Coordination polymer nanofibers generated by microfluidic synthesis

One-dimensional coordination polymer nanostructures are an emerging class of nanoscale materials with many potential applications. Here, we report the first case of coordination polymer nanofibers assembled using microfluidic technologies. Unlike common synthetic procedures, this approach enables parallel synthesis with an unprecedented level of control over the coordination pathway and facilitates the formation of 1D coordination polymer assemblies at the nanometer length scale. Finally, these nanostructures, which are not easily constructed with traditional methods, can be used for various applications, for example as templates to grow and organize functional inorganic nanoparticles.     

Anion control of the self-assembly of 2,3-diarylpyrazines with silver(I) salts

The synthesis and characterization of three one-dimensional coordination polymers formed on self-assembly of 2,3-diarylpyrazines with silver(I) salts are presented. A linear double-stranded coordination polymer was formed on self-assembly of 2,3-bis(3'5'-dimethylphenyl)pyrazine with silver(I) tetrafluoroborate. An essentially linear double-strand coordination polymer was formed on self-assembly of 2,3-bis(3'5'-dimethylphenyl)pyrazine with silver(I) trifluoromethanesulfonate. In contrast a helical silver-pyrazine coordination polymer with extensive intrastrand pi-stacking was formed on self-assembly of 2,3-diphenylpyrazine with silver(I) trifluoroacetate.     

Cu(Ⅱ)脱乙酰壳聚精配位聚合物的配位数

IR,ESR和XPS的测试结果表明,脱乙酰壳聚糖(简记CS)膜在铜氨水溶液浸渍过程中Cu(Ⅱ)既与CS发生配位反应形成Cu(Ⅱ)-CS配位聚合物,也产生吸附作用.ESR谱示出CuCl_2·2H_2O与Cu(Ⅱ)-CS膜中的Cu(Ⅱ)均含有一个单电子,可以利用XPS的Shake-up效应研究Cu(Ⅱ)-CS配位聚合物的配位数,所得结果为4.又以同样的方法研究Cu(Ⅱ)-聚乙烯醇(简记PVA)配位聚合物的配位数,发现Cu(Ⅱ)是以低自旋状态的dsp~2杂化空轨道与PVA的羟基氧配位,其配位数也是4,这与资料所报道的一致,从而间接地验证了此方法研究Cu(Ⅱ)-CS配位聚合物配位数的可靠性.     

电聚合漆酚镝配位聚合物研究

根据漆酚结构特点和稀土元素的电子结构特殊性，研究电聚合漆酚（EPU）与 氯化镝反应生成配位聚合物（EPU－Dy~(3+)）,采用FT－IR，元素分析，XPS，荧光 光谱，DMTA，DTA－TG等手段对其进行表征，探讨其结构与性质，元素分析等测定 结构证明了每个Dy~(3+)分别与EPU分子中3个链节单元的羟基发生配位，从而得到 配位聚合物的结构，证实了配合物中存在着Dy~(3+)与EPU的配位作用，并引起进一 步交联，且镝含量达13.18%，DMTQ，DTA－TG分析结果表明玻璃化转变温度和耐热 性能均有所提高，荧光光谱表明EPU对Dy~(3+)不起敏化作用，EPU与Dy~(3+)配位后 使Dy的特征荧光淬灭。     

Soluble 1D coordination polymers based on dendron-functionalized bispyridine ligand for linking between immobilized molecules on substrates

As a monomeric ligand for a soluble 1D coordination polymer, a benzyl-ether based dendrimer having a rigid 4,4'-bispyridine ligand at the focal point has been synthesized and the coordination chemistry with Pd(II) investigated by nuclear magnetic resonance, ultraviolet-visible and fluorescence spectroscopies, gel permeation chromatography measurement, and X-ray photoelectron spectroscopy. As a result, it was found that the synthesized dendrimer forms a stable, soluble Pd(II) coordination polymer with rough estimation of degree of polymerization of 10 in organic solvents. Furthermore, through the coordination polymer we attempted to link fourth-generation poly(amidoamine) dendrimers (PAMAM) individually immobilized on mica and confirmed the interconnection of the PAMAM through coordination polymers by atomic force microscopy.     

一种难溶多金属氧酸盐配位聚合物的重构与表征

利用电沉积法将不溶于常规无机和有机溶剂的多金属氧酸盐基的配位聚合物1, [{La(H₂O)₅·(dipic)}{La(H₂O)(dipic)}]₂{Mo₈O₂₆}·10H₂O溶解于离子液体[RMIM][HT]或[RMIM][HP]中, 在恒电位下电解, 得到多金属氧酸盐基的配位聚合物膜. 应用红外光谱、X射线光电子能谱和XRD粉末衍射等方法研究多金属氧酸盐基配位聚合物膜的结构, 发现其与多金属氧酸盐基配位聚合物有相同的结构. 实现了多金属氧酸盐基配位聚合物在电极上的重构设计以及多金属氧酸盐基的配位聚合物的二次加工成型.     

电化学聚合漆酚-镨配合物的合成及其表征

通过电化学方法合成的聚合漆物、与氯化镨作用生成聚合漆酚－镨配合物膜。采用原子发射光谱、红外光谱、荧光光谱、差热－热重分析、Ｘ光电子能谱和动态热分析等手段进行表征。探讨其结构与耐热性质。证明了螯合物中存在Ｐｒ＾３＋和ＥＰＵ的配位作用,并引起进一步交联,因而难溶于绝大多数有机溶剂,同时玻璃化转变温度和耐热性能均得提高。     

Thixotropic behavior of metal-containing coordination polymers: Melt viscosity of neutral aliphatic polyesters with Zn carboxylates

The viscosity behavior of polymer melts containing complexes formed between the neutralized polyester poly(diethylene glycol-co-succinic acid) and Zn acetates is discussed. The melt viscosity of these materials increases with the concentration of metal ions, and shows strong thixotropy and shear thinning. This behavior is attributed to the formation of coordination bonds between the electron donor groups within the polyester chain, and empty coordination sites of the various Zn acetate salts. The coordination complexes were obtained in situ in the polymer melt, which contains well-dispersed ZnO, by adding an equimolar amount of CH₃COOH. It is proposed that the shear applied to the polymer melt destroys the polar network of the coordination polymer at a rate that is greater than the rate of reformation of the coordination bonds for the sample returning back to equilibrium, following a shear deformation. © 1996 John Wiley & Sons, Inc.     

铽（III）-噻吩甲酰三氟丙酮-电化学聚合漆酚配合物的研究

研究了铽（III）和噻吩甲酰三氟丙酮（HTTA）形成的配合物与电化学聚合方 法得到的聚合漆酚（EPU）发生配位反应及pH = 10.2时形成配合物Tb(III)-TTA- EPU的组分和结构。红外光谱、X光电子能谱的测试表明Tb~(3+)分别与EPU,TTA~- 发生配位。元素分析和电感偶合等离子体发射光谱（AES）测定结果证明了每个 Tb~(3+)分别与EPU分子中1个链节单元的羟基和3个TTA~-发生配位,从而得到配合 物的结构。动态机械热分析（DMTA）表明发生配位反应后该配合物进一步交联,从 而难溶于大部分有机溶剂,其玻璃化转变温度和耐热性能均得到很大提高。我们对 其荧光性质进行了研究,发现常温下配合物在紫外光下发生强的荧光,主要是Tb~ (3+)离子的~5D_4→~7F_5的跃迁。讨论了溶剂、pH值对配合物荧光强度的影响。当 pH = 10.2时,合成的配合物有最好的荧光性质。     

Solvothermal Synthesis, Crystal Structure and Luminescent Property of a Dy（Ⅲ） Coordination Polymer Constructed by 1,2,4,5-Benzenetetracarboxylic Acid

A three-dimensional coordination polymer {[Dy(H2btec)2/4(btec)3/6(H2O)]·2H2O} n has been synthesized through the reaction of DyCl3·6H2O and 1,2,4,5-benzenetetracarboxylic acid by solvothermal technique, and the crystal structure was determined by X-ray diffraction. The Dy(Ⅲ) coordination polymer crystallizes in monoclinic, space group P21/n with a=10.7063(1), b=7.1491(1), c=17.1197(3), α=90, β=97.10, γ=90°, V=1300.31(3)3 , C10H9DyO11 , Dc=2.389g/cm3 , Z=4, F(000)=892, the final R=0.0165 and wR=0.0448 for I > 2σ(I). The title coordination polymer possesses a three-dimensional framework consisting of nine-coordinate Dy(Ⅲ) centers and two kinds of coordination modes for the 1,2,4,5-benzenetetracarboxylic acid ligands. Every btec4- ligand (deprotonated four protons from 1,2,4,5-benzenetetracarboxylic acid) in the title coordination polymer can clamp three Dy atoms like forceps, which could make the Dy atoms closer in the area of metal-metal interaction. The 3-D framework of the coordination polymer has many channels occupied by the free guest water molecules, and the hydrogen bonds between the coordinated carboxylic groups and guest water molecules could stabilize the crystal structure of the title coordination polymer. In addition, the luminescence properties were also studied.     

Coordination polymers of cadmium with (4-carbomethoxy-naphthalen-1-yloxy) acetic acid derivatives

Three cadmium coordination polymers derived from the dianions of (4-carboxymethoxy-naphthalen-1-yloxy) acetic acid (LH₂) and (4-carboxymethoxy-2,3-bis-arylsulfanyl naphthalene-1-yloxy) acetic acid (L₁H₂), in which the dianions of the corresponding acids act as a spacer to cadmium nodes, have been prepared and characterized. The coordination polymer of the dianion of (4-carboxy-methoxy-2,3-bis-arylsulfanylnaphthalene-1-yloxy) acetic acid with cadmium is a 3-D coordination polymer, whereas the dimensionality of the coordination polymer of the dianion of (4-carboxymethoxy-naphthalen-1-yloxy) acetic acid is dependent on the ancillary ligand. The presence of the chelating ligand 1,10-phenanthroline gave a 1-D polymer of the dicarboxylate anion L, but in the absence of a chelating ligand a 2-D coordination polymer encapsulating hexa–aquacadmium(II) ions was obtained. The latter two coordination polymers show fluorescence emission in the solid state.     

电化学聚合漆酚钐配合物的研究

利用电化学方法合成的聚合漆酚 (EPU)与氯化钐的异丙醇溶液作用 ,得到聚合漆酚钐配合物 (EPU Sm3 + ) .采用红外光谱、紫外 可见光光谱、荧光光谱、XPS光电子能谱、动态机械热分析 (DMTA)以及差热 热重(DTA TG)等手段进行表征 ,确定其每个钐离子与EPU分子中三个链节单元的羟基发生配位 .原子发射光谱(AES)结果确定钐含量达 13 18% .配合物的电阻为 9 6× 10 1 0 Ω(EPU为 7 9× 10 1 0 Ω) .发现因配位作用而使配合物进一步交联 ,而难溶于有机溶剂 ,同时玻璃化转变温度和耐热性能得到提高     

电化学聚合漆酚钴膜引发甲基丙烯酸甲酯（MMA）聚合的研究

利用电化学技术合成的聚合漆酚（EPU）与氯化钴的异丙醇溶液反应,得到电化学聚合漆酚钴配合物膜,经XPS光电子能谱、红外光谱、TG－DTA、动态机械热分析（DMTA）以及原子发射光谱（AES）等手段进行表征并确定其结构。由于每个钴离子与EPU分子中两个链节单元的羟基发生配位引进进一步交联。因此玻璃化转变温度和耐热性能均得到提高。实验表明,在常温下的Na2SO3水体系（pH值为7）中配合物膜能引发甲基丙烯酸甲酯（MMA）聚合。