Synthesis of multi-hydroxyl and sulfonyl dual-functionalized room temperature ionic liquids

Starting from the hydroxylamine (dimethyl amino ethanol, triethanolamine) and 1,3-propane sultone, a series of hydroxyl and sulfonyl dual-functionalized zwitterionic salts and corresponding acidic room temperature ionic liquids have been synthesized. The hydroxyl groups of the synthesized substances were confirmed by the 1H NMR measurement. These zwitterionic salts and ionic liquids may be used for synthesizing other functionalized ionic liquids or ionic liquid-polymer (polyelectrolyte).     

Mixed ligand system of cysteine and thioglycolic acid assisting in the synthesis of highly luminescent water-soluble CdTe nanorods

Highly luminescent water-soluble CdTe nanorods were prepared with the assistance of the mixed ligand system of cysteine and thioglycolic acid; the aspect ratio and photoluminescence of the CdTe nanorods could be controlled by the refluxing time.     

脱蜡剂DF-1的气相色谱-傅里叶变换红外光谱联用分析

脱蜡剂ＤＦ－１是一种含多种有机成分的碳氢化合物，经气相色谱－红外光谱联用分析后，确定了这些组分的组成与含量。     

PBO纤维的合成及其微观结构

聚对苯撑苯并双唑 (PBO)纤维是一种高强度、高模量、高热稳定性、高耐化学腐蚀性的新型纤维。着重介绍了PBO纤维的合成工艺、纺丝工艺 ;并对PBO的微观结构形态和表征方法进行了综合评述。     

Uncoupled metabolism stimulated by chemical uncoupler and oxic-settling-anaerobic combined process to reduce excess sludge production

The effects of three uncoupled metabolic systems (conventional activated sludge process with the addition of 3,3′,4′,5-tetrachlorosalicylanilide [TCS], oxic-settling-anaerobic [OSA] process modified by insertion of a sludge-holding tank in the sludge return line, and TCS and OSA combined process) on reducing excess sludge production were studied. Compared with the control conventional activated sludge process, the most effective system was the combined process, which could reduce excess sludge production by 46.90%. The 180-d operation results confirmed that TCS is an effective chemical uncoupler in reducing the sludge yield but that it had an adverse effect on substrate removal capability, effluent nitrogen concentration, and sludge settleability. The OSA process decreased excess sludge production by only 26% but had less adverse effect on effluent quality and could improve sludge settleability. The effluent total phosphorous concentration of the three systems was slightly lower than of the control unit. Microbial populations were monitored by both microscopic and molecular biologic analysis method (polymerase chain reaction [PCR]-denaturing gradient gel electrophoresis [DGGE]). The presence of TCS caused metazoans to disappear and decreased the number and activity of protozoa. PCR amplification of 16S rRNA and sequent DGGE analysis found a shift in the diversity of the predominant species. The results imply that OSA combined with the chemical uncoupler process may effectively reduce excess sludge yield and not affect process performance significantly.     

胶原-单宁树脂的制备及其对水溶液中UO2+2的吸附特性研究

以天然牛皮为原料,经胃蛋白酶处理制得水解胶原;通过胶原-黑荆树单宁-醛反应制备了胶原-单宁树脂(C-TR)吸附材料,并表征了材料的形貌,测定了材料的比表面积、热变形温度等性质。系统研究了C-TR对水溶液中UO22 的吸附特性。结果表明,C-TR对UO22 有较强的吸附能力。当温度为303K、pH=5.0、UO22 的初始浓度2.5mmol.L-1时,吸附容量达到1.49mmolU/g。升高温度,平衡吸附量增大。pH对吸附容量的影响较大,适宜的pH范围为5.0-6.0。C-TR对UO22 的吸附平衡符合Freundlich方程。吸附动力学可用拟二级速度方程来描述。C-TR对UO22 的吸附基本不受NaCl影响,该吸附材料可望用于海水中铀的富集和分离。     

四元配合物[Nd(C_4H_3OCOO)_2·NO_3·C_(10)H_8N_2]_2的合成与晶体结构

稀土羧酸配合物在萃取分离、杀菌、催化和发光材料等方面有广泛的应用[1]。将氮杂环双齿配位体引入到这类配合物中可增强配合物的共轭作用,提高稳定性并增强其杀菌能力和发光性质[2]。虽然氮杂环双齿配位体邻菲咯啉的稀土羧酸配合物报道较多,但含2,2′联吡啶配位的稀土羧酸配合物的研究相对较少,尤其是含2,2′联吡啶的四元稀土羧酸混配配合物的研究更为少见[3]。2呋喃甲酸是糠醛在人体中的代谢产物,可做为防腐剂、熏蒸剂等,本文报道[Nd(C4H3OCOO)2·NO3·C10H8N2]2配合物的合成和单晶X射线衍射分析结果。2呋喃甲酸(分析纯)、2,2′联吡…     

Thermal behavior of double salt schoenite

The thermal behavior of synthetic schoenite (K₂SO₄·MgSO₄·6H₂)) during heating has been studied by thermal methods. The temperatures of dehydration and decomposition of schoenite have also been determined by DTA, TG and DSC. The thermal reaction equations and the X-ray power diffraction results of the products have been given and the corresponding kinetic parameters have also been obtained.     

Zn∶Er∶LiNbO_3单晶的坩埚下降法生长及光谱特性

报道了Zn∶Er∶LiNbO3单晶的坩埚下降法生长工艺。通过控制晶体生长固液界面的温度梯度(30~35℃.cm-1)、晶体的生长速度(0.8~1.5 mm.h-1)、密闭Pt坩埚等条件生长了宏观无缺陷的Zn2+(3%)和Er3+(0.6%)共掺的LiNbO3单晶。用X射线衍射(XRD)和差热分析(DTA)表征了获得的晶体,并测量了晶体不同部位的吸收光谱和荧光谱。从吸收光谱以及由XRD数据计算所得的晶胞参数推断,沿生长方向Er3+在晶体中的浓度分布逐步减少。光谱数据表明,晶体底部样品的吸收强度和荧光强度要比顶部大,而对应于Er3+上能级4S3/2和2H11/2跃迁至基态4I15/2的绿光发射,晶体底部却比顶部表现出更高的上转换效率。从晶体的内部结构、缺陷情况以及Er3+的分凝现象解释了产生上述现象的内在机制。     

偶氮氯膦mk催化动力学光度法测定痕量铱(Ⅳ)

实验发现,在硫酸介质中,Ir(Ⅳ)对KBrO3氧化偶氮氯膦mk的反应具有催化作用,据此建立了测定痕量铱(Ⅳ)的催化光度法。方法测定铱(Ⅳ)的线性范围为0.2~1.2μg/25mL,检出限为6.88×10-10g/mL。拟定的方法已用于冶金产品和岩矿中痕量铱(Ⅳ)的测定,分析结果满意。