Synthesis of a gold(I) complex with a (thio)phosphine-modified β-cyclodextrin

A gold(I) complex with the bidentate ligand 6^A-S-[2-(diphenylphosphino)-ethyl]thio-β-cyclodextrin has been prepared. The complex has been studied by mass spectrometry as well as IR and NMR spectroscopy. The influence of the ligand:metal ratio on the coordination mode has also been examined.     

iK=I(a—blgl)中 a、b 的关系探讨

本文利用经验公式 i_K=I(a—blgl),通过数学方法导出了 a、b 之间的线性关系,并作了初步讨论。     

Five co-ordination at platinum(II) in a water soluble tertiary phosphine complex: crystal structure of [Pt(PTA)3(I)2]·CH3OH

A five co-ordinate platinum(II) complex containing the water soluble 1,3,5-triaza-7-phosphaadamantane ligand (PTA) [Pt(PTA)₃(I)₂] (1), was characterised in the solid state and aqueous solution. A re-calculation of the Tolman cone angle for the PTA ligand, as well as preliminary equilibrium constants for the formation of 1, is given.     

成膜处理剂(I)

1磷酸二氢锌的作用(1)成膜速率较快磷化膜的耐蚀性随磷酸二氢锌的质量浓度的增加而提高。磷酸二氢锌的质量浓度过高时,虽然成膜速率加快,膜变厚,但沉渣增多,溶液的稳定性变差,膜层的耐蚀性下降;过低时,成膜速率降低,膜层薄且疏松,耐蚀性差。(2)允许溶液的酸度较高在酸度较高的条件下,磷酸锌仍较容易从液相中析出。(3)锌离子的利用率较高在氧化剂的作用下,锌成磷酸盐沉渣的损失比锰盐的小得多。     

电泳涂装(I)

电脉涂装是将被涂物浸在水性涂料中，通过外加电源，靠电场产生的物理化学作用，在被涂物上析出涂膜的一种涂装方法。     

防霉涂料(I)

介绍了防霉涂料的原理、组成及配方设计原则,以及防霉涂料的发展趋势。     

Development of a CH4 dehydroaromatization–catalyst regeneration fluidized bed system

A pilot-scale methane dehydroaromatization–H₂ regeneration fluidized bed system (MDARS) was developed. In the MDARS, the catalyst circulation between a fluidized bed reactor and a fluidized bed regenerator with the help of a catalyst feeder allowed methane dehydroaromatization (MDA) and H₂ regeneration to be carried out simultaneously, which is good for maintaining a stable MDA catalytic activity. A fixed bed reactor (FB) and a single fluidized bed reactor (SFB) were also used for a comparative study. The experimental results showed that the catalytic activity in the MDARS was more stable than that in the FB and SFB reactors. The effects of some parameters of MDARS on the CH₄ conversion and product selectivity were investigated. To verify the feasibility and reliability of the MDARS, an eight-hour long-term test was carried out, which demonstrated that the operation of the MDARS was stable and that the catalytic activity remained stable throughout the entire experimental period.     

A solvothermal synthesis of a novel 1D ladder-like (NH3CH2CH2NH3)AgAsS4 containing N–H⋯S hydrogen bonding

A one-dimensional compound (NH₃CH₂CH₂NH₃)AgAsS₄ with ladder-like chains was synthesized solvothermally. This compound crystallizes in the monoclinic system, space group C2/c, with a=13.5805(8) Å, b=6.5331(3) Å, c=22.7711(9) Å, α=90°, β=106.42(3)°, γ=90°, Z=8. The rare type hydrogen bonding of N–H⋯S and electrostatic force hold the anionic chains together.     

A luminescent 2,2′-bipyridyl tricarbonyl rhenium(I) complex containing a non-bridging dicyanamide ligand

fac-(bpy)Re(CO)₃CF₃SO₃ reacts with sodium dicyanamide in THF/MeOH/H₂O to give fac-(bpy)Re(CO)₃N(CN)₂ (1) in 81% yield. Complex 1 was characterized spectroscopically and electrochemically using NMR, IR, UV–Vis, fluorescence and cyclic voltammetry. Complex 1 crystallizes in the P2₁/c space group with a = 7.2004(3) Å, b = 12.9547(5) Å, c = 16.8523(6) Å, β = 101.989(1) °, and Z = 4. Photophysical measurements indicate the π-acceptor ability of N(CN)₂⁻ as equivalent to that of the 4-N,N-dimethylaminopyridine ligand. Strong luminescence is observed in solution at room temperature and in 4:1 ethanol:methanol matrices at 77 K attributed to the ³MLCT state.     

硫杂冠醚对Ag(I)和Tl(I)的萃取

基于冠醚的配位化学及软硬酸碱理论,设计并合成了五种硫杂冠醚,系统研究了其对Ag(I)和Tl(I)两种软酸离子的络合能力.模拟计算结果表明,五种冠醚与Ag(I)和Tl(I)络合后构型均发生了转变,且结构优化后的五种冠醚与Ag(I)络合过程的ΔG和ΔU均较负,表现出了一定的配位能力,而与Tl(I)络合过程的ΔG和ΔU均接近...     

双核Ag(I)、Cu(I)穴合物的合成

以硝酸银为模板剂,用三(3-氨基丙基)胺(trpn)与2,5-二甲氧基苯基-1,3-二醛通过[2 3]缩合得到一个三维双核银(I)穴合物,以此为前体与高氯酸四乙腈合铜(I)进行置换反应,进而获得了其双核铜(I)穴合物.     

油对CH2FCF3(R134a)饱和液体运动粘度影响的测试实验研究

在设计了粘度实验测量装置本体及其倾角控制子系统、空气恒温子系统、运用LabVIEW软件平台和NI-SCXI数据采集系统的基础上,搭建了倾斜管式液体粘度测量法的测试系统.并在273.15～293.15 K温度范围内,对CH2FCF3(R134a)中含Solest-120冷冻油浓度为0～100 ppm时的饱和液体运动粘度进行了测试.结果表明,在温度一定时,含油量20 ppm比纯质R134a的粘度增加4.3%～9.1%,此后含油浓度每增加10 ppm,粘度增加1.7%～5.2%;在含油量一定时,油对R134a饱和液体运动粘度的影响随着温度的升高逐渐减弱.文中给出了饱和液体运动粘度工程计算公式,为新型环保节能换热设备开发理论计算提供了急需的物性参数和设计基础.     

不同介质对CH205和CH205/CH220胶粘剂粘接效果的影响

研究了在不同浸泡时间下,不同介质(热空气、煤油和滑油)对单涂CH205胶粘剂和双涂CH205(底涂)/CH220(面涂)胶粘剂的试样和试件拉伸强度和粘接效果的影响。结果表明,菌状试样单涂CH205胶粘剂的耐介质性能明显优于双涂CH205/CH220胶粘剂;试件双涂CH205/CH220胶粘剂的耐介质性能较差,尤其是在煤油环境中的粘接效果较差。     

磁场对(C4H9NH3)2(CH3NH3)Pb2I7钙钛矿发光特性调控的研究

(C₄H₉NH₃)₂(CH₃NH₃)Pb₂I₇是一种Ruddlesden-Popper相钙钛矿材料，具有层状结构，层间通过van der Waals力结合，因此可以通过机械剥离的方法，获得其二维薄层。二维(C₄H₉NH₃)₂(CH₃NH₃)Pb₂I₇内束缚激子会自发复合从而表现出强的荧光，其圆极化率、峰位均受磁场调控。在外磁场中，荧光圆极化率与磁场呈线性关系，激子中电子和空穴之间的朗德因子差Δg约为0.43。束缚激子在磁场中受抗磁效应影响，致使其发光峰随磁场增加而红移。     

Strong nonlinear optical effects from a new polymeric silver(I)–propyl–benzotriazole complex

A new polymeric Ag(I) complex {[Ag₂(pbbt)₃](NO₃)₂·0.5H₂O}_n [where pbbt = 1,1′-(1,3-propylene)-bis-1H-benzotriazole] was synthesized as a good optical limiter. Single-crystal X-ray diffraction determined that the complex assumed a rare, two-dimensional lamellar structural motif with isolated cavities of [Ag₆(pbbt)₆]. The Z-scan measurements of an 8-ns pulsed laser at 532 nm revealed that the presented complex in dimethylformamide exhibited very strong third-order optical nonlinear absorption. The optical-limiting (OL) performance was investigated in the sample of the complex induced by 8-ns and 30-ps pulses at 532 nm. The results show that this complex exhibited large OL effects with a very low limiting threshold value of 0.16 J/cm² under 8-ns pulse and 0.56 J/cm² under 30-ps pulses, among those of the best OL materials. Density functional theory calculation results further confirmed the cooperative contributions of Ag ions and bridge ligands to the optical nonlinearities of Ag(I)-containing metal–organic complex. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

无溶剂合成Me3SiOMeRSiMe3〔R=O(CH2)2N(CH3)2〕的研究

利用无溶剂加热方法,以N,N－二甲基乙醇胺(DMEA)和七甲基三硅氧烷（MDHM）为原料,合成Me3SiOMeRSiMe3〔R=O(CH2)2N(CH3)2〕。讨论了反应中反应时间,反应温度,反应物摩尔比,催化剂浓度等因素对反应转化率的影响。采用正交实验,对以无溶剂加热法合成MDHM型三硅氧烷叔胺的工艺进行优化,并利用减压蒸馏分离提纯和气相色谱技术确定纯后产物纯度,并且经过质谱分析和核磁共振鉴定产物的结构。     

Improving CH4 uptake and CH4/N2 separation in pillar-layered metal–organic frameworks using a regulating strategy of interlayer channels

A pore engineering strategy involving the regulation of pillars in a series of pillar-layered metal–organic frameworks was presented to promote pore size adjustment and pore environment optimization for efficient separation of CH₄ from coal-mine methane. Compared with the original Ni(BTC)(BPY) and Ni(BTC)(TED), the suitable pore size and rich supply of carboxylate oxygens in the newly constructed Ni(BTC)(PIZ) resulted in the strongest recognition of CH₄, leading to both high CH₄ uptake (1.62 mmol/g) and CH₄/N₂ (50/50) selectivity (7.32) at 298 K and 1 bar. Its optimal balance performance between uptake and selectivity was better than most reported adsorbents, which further led to the most efficient separation of CH₄ from CH₄/N₂ mixtures. The stability of the structure and performance was verified by repeated cycle tests. Overall, it is believed the structure constructed based on the regulation strategy of the interlayer channel would enable the application of promising metal–organic frameworks in industrial gas separation processes.     

Single crystal structure of a two-dimensional framework: [{Co(4,4′-bpy)(HO3PCH2CH2CH2CH2PO3H)(H2O)2}·4H2O]n

The structure of [{Co(4,4^′-bpy)(HO₃PCH₂CH₂CH₂CH₂PO₃H)(H₂O)₂}·4H₂O]_n 1 was determined by single crystal X-ray diffraction. Compound 1 contains a new two-dimensional framework layer, which is built up from parallelogram units in bc plane. The layers are constructed into a three-dimensional structure by interlayer hydrogen bonds.