Synthesis ofcis-bis-P,P'-(triethyIammonium-2,2,5-triphenyl-1,3,2,5-dioxaborataphosphorinane)dichloroplatinumii)

The reaction of triethylammonium 2,2,5-triphenyl-1,3,2,5-dioxaborataphosphorinane with PtCl₂(PhCN)₂ gave a complex whose structure was given ascis-bis-P,P'-(triethylammonium 2,2,5-triphenyl-1,3,2,5-dioxaborataphosphorinane)dichloroplatinum(II) on the basis of¹H and³¹P NMR, medium- and long-wave IR spectroscopy, and conductometry.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 762–763, April, 1994.     

Synthesis and molecular and crystal structures of triethylammonium 2,2,5-triphenyl-1,3,2,5-dioxaboratophosphorinane hydrate

Organic and Physical Chemistry Institute, Kola Scientific Center, Russian Academy of Sciences. Translated from Zhurnal Strukturnoi Khimii, Vol. 33, No. 2, pp. 133–137, March–April 1992.     

Improved preparation of 2 M triethylammonium bicarbonate

ABSTRACT

The widely used chromatographic eluent, aqueous triethylammonium bicarbonate, can be efficiently prepared as 2?M stock solution by carbonation of a mixture of triethylamine and water in a commercially available pressure reactor (20–25?psi). This improved process reduces carbon dioxide waste emissions by ca. 90% compared to traditional gas bubbling at atmospheric pressure.     

Synthesis,characteristics and adsorption properties of polyphenylene sulfide based strong acid ion exchange fiber

A novel strong acid ion exchange fiber (HO₃S‐BC‐XDC‐PPS) was prepared via crosslinking and grafting copolymerization of 1,4‐bischloromenthyl benzene (XDC), benzyl chloride (BC) on polyphenylene sulfide (PPS) matrix, as well as following sulfonation reaction. The physicochemical structures and properties of the fibrous ion exchanger were characterized with Fourier transform infrared, scanning electron microscopy, thermogravimetric analysis, elementary analysis and chemical titration, respectively. Compared with the preparation of traditional polypropylene–styrene–divinylbenzene‐based ion exchange fibers, the synthesis strategy of PPS‐based strong acid ion exchange fiber avoided the complicated irradiation grafting process with ⁶⁰Co or other radiation facilities. Owing to the existing of thioether (Ar―S―Ar) and sulfoxide (―SO―) unit in fibrous matrix, a super‐equivalent adsorption phenomenon for Cu(II) ion was observed. The HO₃S‐BC‐XDC‐PPS fiber possessed high exchange capacity (≥3.0 mmol/g) and excellent thermostabilities, and the exchange capacity and desorption rate were not decreased after six adsorption desorption cycles. Copyright © 2014 John Wiley & Sons, Ltd.     

反应性离子交换法合成纳米ZnO及其光催化性能

 以 ZnSO4 和 NaOH 为原料, 强碱性阴离子交换树脂为模板, 采用反应性离子交换法一步合成了高纯纳米 ZnO 晶体, 并运用扫描电子显微镜、X 射线衍射和紫外-可见光谱等技术对样品进行了表征, 初步探讨了合成机理. 结果表明, 制得的纳米 ZnO 晶体呈一维棒状, 它在树脂表面的形成过程与 ZnSO4 的初始浓度密切相关. 该 ZnO 样品对光催化降解甲基橙具有较高的活性和循环使用性能.     

Complexes of 2,5-diphenyl-1,3,2,5-dioxaboraphosphorinane and 1,3,5-triphenyl-1,3,5-diazaphosphorinane with molybdenum hexacarbonyl

The reaction of 2,5-diphenyl-1,3,2,5-dioxaboraphosphorinane (L) and 1,3,5-triphenyl-1,3,5-diazaphosphorinane (L) with molybdenum hexacarbonyl gave, respectively, Mo(CO)₄L₂ and Mo(CO)₅L complexes.A. E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Science Center, Russian Academy of Sciences, 420083 Kazan. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 1, pp. 201–203, January, 1992.     

Synthesis of LiAlTiO4 and its selectivity to Li+ exchange

The ion-exchanger LiAlTiO₄ of spinel type was prepared by the common precipitation/hydrothermal crystallization method, and was acid-modified. Its ion-exchange properties for alkali ions such as saturation capacity of exchange, distribution coefficient and pH titration curve were determined. LiAlTiO₄ was characterized by the X-ray diffraction method. The acid treatment of LiAlTiO₄ caused Li⁺ extraction ratio to change from 28% to 72%, while the dissolution of Al is less than 6.8%. This inorganic ion-exchanger (LiAlTiO₄-700) has a higher saturation capacity of exchange for Li than for other alkali ions, the saturation capacity of exchange for Li⁺ reaches 4.29 mmol/g (30.03 mg/g); LiAlTiO₄-700(H) has a higher selectivity of ion exchange for Li⁺ than for other alkali ions. These results show LiAlTiO₄-700(H) has better memory and selectivity of ion exchange, and higher capacity of ion exchange for Li⁺. It is a kind of prospective ionic sieve for Li⁺. __________ Translated from Chinese Journal of Applied Chemistry, 2005, 22 (7) (in Chinese)     

LiAlTiO4的合成及对Li+的离子交换选择性

LiAlTiO4的合成及对Li+的离子交换选择性;复合氧化物;锂;离子交换;无机离子交换剂;尖晶石结构     

尖晶石构造LiCu0.5Mn1.5O4的合成及其在水溶液中对Li^＋的抽出／嵌入反应

尖晶石构造ＬｉＣｕ０．５Ｍｎ１．５Ｏ４的合成及其在水溶液中对Ｌｉ＋的抽出／嵌入反应董殿权钟杰柳敦雷刘亦凡＊（青岛化工学院化学工程系青岛２６６０４２）关键词尖晶石，Ｌｉ－Ｃｕ－Ｍｎ复合氧化物，合成，锂离子交换１９９７－０９－１７收稿，１９９７－１２－２...     

Synthesis and physicochemical properties of chelating sorbents containing functional groups of N-aryl-3-aminopropionic acids

Two types of chelating sorbents with different types of addition of iminodipropionate groups to a polymeric matrix were synthesized: carboxyethylated aminopolystyrene (sorbent 1) based on linear polystyrene and carboxyethylaminomethylpolystyrene (sorbent 2) based on the copolymer of styrene and divinylbenzene. The ionization constants and concentrations of functional groups of the sorbents (exchange capacity for hydrogen ions) were determined. The sorbents exhibit high selectivity for copper(II) ions with the maximum of sorption from ammonia—acetate buffer solutions lying in a range of pH 5.0–7.5. The time needed for a solution of copper(II)—sorbent system with continuous stirring to reach exchange equilibrium is 3.5 and 2 h for sorbents 1 and 2, respectively. The exchange capacity for copper(II) ions is 2.54 and 0.10 mmol g⁻¹, respectively. Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 800–806, May, 2006.     

Li4Mn0.5Ti0.5O4合成与鉴定

Li4Mn0.5Ti0.5O4合成与鉴定;LiMnTi复合氧化物;尖晶石型结构;离子筛;离子交换;锂     

Synthesis and characterization of ion-exchangeable titanate nanotubes

Titanate nanotubes were synthesized under hydrothermal conditions. The optimized synthesis (100-180 degrees C, longer than 48 h), thermal and hydrothermal stability, ion exchangeability and consequent magnetic and optical properties of the titanate nanotubes were systematically studied in this paper. First, nanotubes with monodisperse pore-size distribution were prepared. The formation mechanism of the titanate nanotubes was also studied. Second, the thermal and hydrothermal stability were characterized with X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), Fourier transform infrared (FTIR), and Raman spectroscopy. Results showed that sodium ions played a significant role in the stability of the frameworks. Third, the selective ion exchangeability was demonstrated with a series of ions. The ion substitution also enlarged the BET surface area of the titanate nanotubes to 240 m(2) x g(-1). Combination of these two features implied that these nanotubes might be functionalized by substitution of different transitional-metal ions and consequently used for selective catalysis. Magnetism, photoluminescence, and UV/Vis spectra of the substituted titanate nanotubes revealed that the magnetic and optical properties of the nanotubes were modifiable.     

3-二氯乙酰基-2,2,5-三甲基-1,3- 唑烷的合成和生物活性

以异丙醇胺和丙酮为原料合成恶唑烷,产品不经分离直接与二氯乙酰氯酰胺化反应得到标题化合物,经元素分析,IR和1H NMR确定了化合物的结构,并进行了生物活性测定。     

层状钠锰氧化物的制备及离子交换反应动力学

层状钠锰氧化物的制备及离子交换反应动力学     

硫化铜纳米粒子的合成及应用于汞离子的测定

室温下以柠檬酸三纳为稳定剂,在水相中合成了CuS纳米粒子(NP-CuS)。 用共振光散射(RLS)技术探索了不同pH值和Cu2+与S2-不同配比条件下,体系RLS强度(IRLS)的变化。 结果表明,在最佳实验条件下,在0.01~100 μmol/L范围内IRLS与汞离子浓度间呈现良好的线性关系(r=0.991),据此建立了测定水中微量汞的方法。 方法的检测限为0.003 μmol/L,样品加标测定的回收率为100.3%~103.4%。     

2,4,5-三苯基咪唑Schiff碱的合成及其抑菌活性

以联苯甲酰、对硝基苯甲醛和乙酸铵为原料,经缩合和还原反应制得2-(4-氨基苯基)-4,5-二苯基咪唑(2);2再与芳香醛缩合制得三个新型的2,4,5-三苯基咪唑Schiff碱衍生物(3a～3c),其结构经1H NMR,IR和MS表征。初步抑菌活性测试结果表明,3a～3c对大肠杆菌,苏云金杆菌和枯草芽孢杆菌均有较好的抑菌活性。     

A Convenient Modification of the Fischer Indole Synthesis with a Solid Acid

A new one-pot version of the titled reaction involves heating a mixture of a carbonyl compound, a phenylhydrazine, and the cation exchange resin Amberlite IR 120 in refluxing ethanol. A variety of enolizable aldehydes, and ketones and several substituted phenylhydrazines could thus be converted to the corresponding indoles in excellent yields (70–88%). Reaction times were typically 6–10 h, with the resin being then filtered off and the product isolated after minimal workup.     

Synthesis and characterization of 2, 4-dihydroxy-benzaldehydeoxime-formaldehyde polymers and their application as ion-exchangers

Polymers were prepared by the condensation of 2, 4-dihydroxybenzaldehydeoxime (2, 4-DBO) and formaldehyde (F) in the presence of oxalic acid as catalyst with varying molar ratios of reacting monomers. Polymers were characterized by their IR spectra, elemental analyses, TGA and M_n as determined by vapour pressure osmometry as well as by non-aqueous conductometric titrations. Viscosity measurements of the solutions of polymer samples were carried out in dimethylformamide. Chelation ion-exchange properties have also been studied employing the batch equilibration method. This method involved the measurement of distribution of a given metal between the polymer sample and a solution containing metal ions. The study was carried out over a wide pH range and in media of various ionic strengths. The polymer showed a higher selectivity for UO ₂ ²⁺ and Fe³⁺ ions than for Cu²⁺, Ni²⁺, Co²⁺ and Mn²⁺ ions.     

Chelation ion-exchange properties of salicylic acid-urea-formaldehyde copolymers

Chelation ion-exchange properties of copolymers prepared from salicylic acid, urea and formaldehyde by condensation in presence of acid catalyst were studied for Cu²⁺, Fe³⁺, UO²⁺, Mn²⁺,Zn²⁺ and Co²⁺ ions. A batch equilibration method was adopted to study the selectivity of metal ion uptake. This method involved the measurement of distribution of a given metal between the copolymer sample and a solution containing the metal ions. The study was carried out over a wide pH range and in media of various ionic strengths. The copolymer showed a higher selectivity for UO₂ ²⁺, Cu²⁺ and Fe³⁺ ions than Mn²⁺, Co²⁺ and Zn²⁺ ions.