New Acid-Polyfunctional Water-Soluble Phosphazenes: Synthesis and Spectroscopic Characterization

Poly [bis(phenoxy)] phosphazene sulfonic acid and its mixed substitution derivatives containing N-methylsulfonamide, sulfonylaminoacetic, and free sulfonic acid functions have been obtained and characterized by IR and ¹H-, ³¹P-, ¹³C-NMR spectroscopy. The polymers are all water soluble. Poly [bis(4-benzoylphenoxy)] phosphazene sulfonic acid could not be obtained due to chain degradation during the synthesis.     

Synthesis and Characterization of 5,5'''',6,6''''-(2,2-Bipyridine)tetraacid

It is well known that the dianhydride based on aromatic tetraacid plays a critical role in the preparation of polyimides, polypyrrolones or their copolymers, specially all kinds of polyimides have widely gotten applications in advanced technologies1-3. Polyimide exhibits a serials of excellent performances, e.g. high strength, modulus, heat resistance, dielectric property, chemical stability as well as radioresistance2, meanwhile, polypyrrolone should be also a promising high performance mater…     

Polyvinyl Chloride-g-Styrene): Synthesis,Characterization, and Physical Properties

The synthesis, characterization and some physical properties of polyvinyl chloride-g-styrene) are described. The graft copolymer was prepared by initiating the polymerization of styrene with polyvinyl chloride) in conjunction with Et₂AlCl. Graft copolymer characterization involved GPC, T, heatstability, and intrinsic viscosity studies. Among the physical properties stress-strain and impact strength measurements have been carried out.     

Synthesis,characterization, and polymerization of propenyl ether analogues

A series of aromatic monomers bearing cationically polymerizable propenyl groups were prepared and characterized using the readily available starting materials: isoeugenol and o-allyl phenol. Monomers with both propenyl and vinyl ether functional groups were also synthesized by the reaction of these starting materials with chloroethyl vinyl ether. The reactivity of the resulting monomers in photoinitiated cationic polymerization was studied using differential scanning photocalorimetry and photogel point measurements. Their thermal properties were determined using thermogravimetric analysis. © 1994 John Wiley & Sons, Inc.     

Synthesis and Characterization of Some New Benzimidazole Derivatives

Synthesis of nine new benzimidazole derivatives was reported. The products were identified by ¹H NMR, mass spectroscopy, and infrared spectroscopy.     

双光子吸收聚合引发剂EPVPVC的合成和非线性光学性质的研究

合成了一个新的双光子吸收聚合引发剂,9-乙基-3-{2-[4-(2-吡啶基-4-乙烯基)-苯基]-乙烯基}-9氢咔唑 (EPVPVC),用¹H NMR谱、¹³C NMR谱和元素分析进行了表征.测试了紫外吸收光谱、单光子荧光光谱、单光子荧光寿命、单光子荧光量子产率和双光子荧光光谱.量化计算结果表明,EPVPVC的双光子吸收截面为56.6×10^-50 cm⁴·s·photon^-1.在780 nm的飞秒脉冲激光激发下,EPVPVC发出较强的上转换荧光,荧光峰位于536 nm.用EPVPVC做引发剂,加入丙烯酸酯型齐聚物(cN120C80),在脉冲宽度为200 fs,重复频率为76 MHz,中心波长为780 nm 飞秒脉冲激光下,制作了一个三维周期性微结构.在理论计算的基础上,定性地探讨了其可能的聚合机理.     

New heterobicationic hemicyanine dyes: Synthesis,spectroscopic properties,and photoinitiating ability

This article describes the synthesis, spectroscopic properties, and free‐radical photoinitiation ability of new heterobicationic hemicyanine dyes. A new synthetic strategy for the preparation of unsymmetrical cyanine dyes has been developed, based on 2‐methylbenzothiazole derivative quaternization by 3‐pyridinium‐1‐bromopropane bromide and subsequent condensation of the resulting product with p‐(N,N‐dimethylamino)benzaldehyde. The tested dyes possess in one molecule two quaternary nitrogen atoms; that is, they are heterobicationic in nature. Novel hemicyanine dyes have been tested as visible‐light photoinitiators of vinyl monomer polymerization. Heterobicationic hemicyanine dyes paired with n‐butyltriphenylborate anions are very efficient photoinitiators of the free‐radical polymerization of trimethylolpropane triacrylate when irradiated with the visible emission of an argon‐ion laser. The photoinitiating abilities of the novel photoredox pairs are compared with the photoinitiation properties of their monocationic equivalent {3‐methyl‐2‐[4‐(N,N‐dimethylamino)styryl]benzothiazolium n‐butyltriphenylborate} as well as a Rose Bengal derivative (a typical triplet‐state photoinitiator). © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 44: 6345–6359, 2006     

一个新的席夫碱——N，N-二甲基甲酰胺水杨酰腙的合成与表征

水杨酰肼和过量的N,N-二甲基甲酰胺(DMF)在三氯氧磷的催化下合成了一种新的席夫碱——N,N-二甲基甲酰胺水杨酰腙,其结构经元素分析和IR确证。研究了可能的反应机理。     

新型磷酸硅铝分子筛SAPO-56的合成与表征

以N,N,N',N'-四甲基-1,6-己二胺(TMHD)为模板剂,采用水热法在Al₂O₃-P₂O₅-SiO₂体系中合成了SAPO-56分子筛.固定模板剂和水,得到Al-Si-P三元体系相图.当原料物质的量比为0.52)/n(M)<0.7(M=SiO²⁺Al₂O³⁺P₂O₅),0.152O₃)/n(M)<0.4及0.12O₅)/n(M)<0.3时,出现SAPO-56合成的纯相区.固定合成凝胶中硅、铝、磷和水的量,模板剂的用量改变对合成影响较大.n(TMHD)/n(P₂O₅)≥2时,产物是纯SAPO-56.用XRD,SEM,IR,DTA-TG和吸附等方法研究了产物的物化性能.结果表明,SAPO-56分子筛具有较好的热稳定性(骨架坍塌温度为1150℃)和较大的水吸附量(41%).SAPO-56分子筛催化剂对甲醇转化制烯烃反应表现出了良好的催化活性和较高的C₂和C₃烯烃选择性.     

Synthesis and Characterization of Six New Carbazolyl Porphyrins

Novel 4-(N-carbazole methyl) benzoic acid and N-carbazolacetic acid are synthesized, then six new carbazolyl porphyrins are synthesized by bonding these acids to hydroxy porphyrin or amido porphyrin via acyl chloride or N,N′-dicyclohexylcarbodiimide (DCC)–dimethylaminopyndine methods. The formations of these title compounds, as well as their intermediates are characterized by ¹H NMR, mass spectrometry, Fourier transform–infrared, and elemental analysis.     

高支化聚合物的合成与表征

介绍了近年来在高分子化学领域内十分活跃的高支化聚合物研究的状况。指出了通过ＡＢｘ型单体的缩聚反应和Ａ＝Ｂ－Ｃ＾８型单体的自缩合乙烯都可获得高支化聚合物。目前用以表征高支化聚合物支化度和分子量的方法主要为核心共振法和凝胶渗透色谱法,在实际应用中都存在局限性。     

聚磷腈高分子

简要综述了聚磷腈高分子的合成、结构与物理性能及在新型功能材料方面的应用,包括高分子电解质、光导电材料、非线性光学材料以及生物医用材料。     

Some Novel Conducting Polythiophene Derivatives: Theoretical Analysis,Synthesis, Characterization and Electroreological Properties

A series of alternating phylene and symmetrically bithiophene containing repeat units and the respective homopolymers have been synthesized and characterized by combining FTIR, UV-Vis spectroscopy, four probe conductivity measurement, TGA and SEM analysis. Quantum mechanical calculations of the structures and infrared spectra of the monomers and respective dimers were compared with experimental results. The polymers are soluble in N-methyl-pyrrolidone (NMP). The samples have conductivities of 10^?5 S/cm levels. Thermal degradation analysis results indicated that poly-bithiophene derivatives have higher thermal stabilities than poly-monothiophene derivatives. All samples exhibited different surface morphologies. The electrorheological (ER) properties of polymer suspensions in silicone oil were prepared and ER behavior was investigated as a function of shear rate, electric field strength and frequency.     

离子交换树脂固载SnCl4：合成,表征和酯化反应

均相催化剂的固载化,由于具有独特属性,近年来发展很快.我们在用高分于材料固载路易斯酸的研究中,发现固载在离子交换树脂的路易斯酸催化性能非常稳定.本文将空气中强烈水解,且腐蚀性很强的四氯化锡与大孔苯乙烯系阳离子交换树脂反应,首次合成了离了交换树脂四氯化锡复合物(以下简写成压IER·SnCl_4),并对IER·SnCl_4的IR、UV光谱性质及在酯化反应中的催化性能进行了研究.结果表明IER·SnCl_4不仅活性高,而且在重复使用性能上表现了突出特点,显示了良好的应用前景.     

一种新型钼钒酸盐的合成、结构和磁性表征

用水热方法合成了一个新型的钼钒多金属氧酸盐[PⅤMoⅥ7MoⅤVⅣ8O44][Ni(Phen)2OH]4·3H2O(1),用元素分析、红外光谱和X射线单晶衍射等技术手段对化合物的晶体结构进行了表征。结果表明,该化合物属于三斜晶系,P-1空间群,a=1.51300(11)nm,b=1.74813(15)nm,c=2.58896(18)nm,α=72.842(4)°,β=89.240(5)°,γ=72.627(5)°,V=6.2233(8)nm3,Z=1,R1=0.0962,wR2=0.2572。化合物是高还原态的四帽α-Keggin结构钼钒多金属氧簇,通过簇阴离子4个钒帽上的端氧分别支撑4个镍过渡金属配合物,形成一个中性的多金属氧酸盐。多金属氧簇上的端氧与结晶水分子之间的强烈氢键使化合物形成了三维超分子结构。     

一种新型钼钒多酸化合物的合成、结构与荧光性能

采用水热技术,合成了一种新型四帽Keggin结构多酸化合物[H₃Mo₈^ⅥV₈^ⅣO₄₀(AsO₄)](en)₂(4,4-bipy)₇·9H₂O(en:乙二胺;bipy:联吡啶)(1),并对化合物进行了元素分析、红外光谱、X射线光电子能谱和X射线单晶结构分析。 晶体结构分析表明, 化合物属三斜晶系,P1空间群,晶胞参数a=1.47395(5) nm,b=1.48172(6) nm,c=1.62881(7) nm,α=66.16(3)°,β=87.15(2)°,γ=63.42(1)°,V=2.8723(2) nm³,Z=1,R₁=0.0728,wR₂=0.2014。 化合物由四帽Keggin多酸阴离子、4,4'-联吡啶、乙二胺和结晶水分子构成,化合物分子间存在大量的氢键,使化合物1形成3-D超分子结构。 荧光测试表明,化合物1能发出较强的荧光,有可能成为潜在的光活性材料。     

Synthesis,Crystal Structure and Characterization of a New Zinc Citrate Complex

A new Zn-citrate coordination complex {K[Zn(C6H5O7)(H2O)]}n(1) was synthesized via hydrothermal reaction. In the crystal structure of complex 1, each citrate serves as the quadricdentate ligand coordinating to three Zn(II) ions, forming a zigzag chain, and such chains are further connected into a 3D network by the K+ linkers. Crystal data for complex 1: triclinic, space group P1, a = 7.3487(9), b = 7.5397(6), c = 9.6772(8) ?, α = 76.894(8), β = 68.260(10), γ = 65.155(10)°, V = 450.34(7) ?3 and Z = 2. Other characterizations by elemental analysis, IR, TG and fluorescence were also described.     

Synthesis,Spectral, and Structural Characterization of Bisthiocarbohydrazone Derivatives

Abstract

Bisthiocarbohydrazone derivatives of three heterocyclic ketone ligands, having a flexible coordination ability; 1, 5-bis (2-acetylthiophene) thiocarbohydrazone; 1, 5-bis (2-acetylfuran) thiocarbohydrazone; and 1, 5-bis (2-acetylpyrrole) thiocarbohydrazone were synthesized and characterized by elemental analysis, UV-visible, FT-IR, cyclic voltammetry, and ¹H and ¹³C-NMR spectral studies. All bisthiocarbohydrazone exhibited the thioketone—thioenol tautomeric forms, as evidenced by IR spectral data and single crystal X-ray diffraction studies of 1, 5-bis (2-acetylfuran) thiocarbohydrazone and 1, 5–bis (2-acetylpyrrole) thiocarbohydrazone.

Supplementary materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfer, and Silicon and the Related Elements for the following free supplemental files: Additional figures and tables.     

两种新型氯代荧光素探针染料的合成和表征

研究了两种具有空间连接链的新型氯代荧光素探针染料4',5'-二氯-6-(5-羧基戊氨基羰基)荧光素和2',7'-二氯- 6-(5-羧基戊氨基羰基)荧光素的合成. 以氯代间苯二酚和苯三酸酐为起始原料经7步反应得到了目标化合物, 产率良好. 测定了目标产物的荧光性能, 结果显示该化合物具有很高的荧光量子产率, 与荧光素母体相比其激发和发射波长明显向长波方向移动. 所得产物结构经1H NMR, IR, MALDI-TOF MS以及元素分析进行了表征.     

新型氮功能化大环配体的合成与表征

合成了新型氮功能化大环配体内消旋-5,5,7,12,12,14-六甲基-1,4,8,11-四氮杂环十四烷-N,N＇-二乙酸乙酯(TETADE);内消旋-5,5,7,12,12,14-六甲基-1,4,8,11-四氮杂环十四烷-N,N＇,N＇,N＇＇,N＇＇＇-四乙酸乙酯(TETADE);内消旋-5,5,7,12,12,14-六甲基-1,4,8,11-四氮杂环十四烷-N,N＇-二乙酸(TETADA);内消旋-5,5,7,12,12,14-六甲基-1,4,8,11-四氮杂环十四烷-N,N＇,N＇,N＇＇＇-四乙酸(TETATA)和内消旋-5,5,7,12,12,14-六甲基-1,4,8,11-四氮杂环十四烷-N,N＇-二异羟肟酸(TETAD-HA).均通过元素分析、IR,1H NMR和MS表征.