离子交换/8-羟基喹啉荧光法分别测定天然水中的无机和有机单核铝

采用离子交换／氯仿萃取－８－羟基喹啉荧光法（８－Ｏｘ－ＣＦ－ＥＦ）分别测定了天然水样中的无机和有机单核铝。与Ｄｒｉｓｃｏｌｌ建立的铝形态区分法进行了比较,结果一致,本法优点是：可以直接测定水中的无机单核铝,减少了实验误差。     

邻苯二酚紫-示波计时电位法测定天然水中不同形态铝

报道邻苯二酚紫-示波计时电位法分别在酸性和碱性条件下直接检测天然水中的无机单核铝和总单核铝浓度。并用该法测定了水样中的总铝,有机单核铝和酸溶态铝,从而实现了天然水中5种Al形态的电化学测定。测定了20多个实际水样,与Driscoll方法进行了对照,结果基本一致。     

偏最小二乘光度法同时测定铜和铁的研究及应用

７－（１－苯偶氮）－８－羟基喹啉－５－磺酸钠在ＰＨ＝４．７５ＨＡｃ－ＮａＡｃ缓冲溶液中能与Ｃｕ（Ⅱ）和ＦＥ（Ⅲ）形成稳定的络合物，本文研究了Ｃｕ（Ⅱ）－ＰＡＨＱＳ、Ｆｅ（Ⅲ）－ＰＡＨＱＳ体系的显色条件，以偏最小二乘法处理两者重叠吸收峰，建立了光度法同时测定铜和铁的方法。     

示波库仑滴定法测定水中铝

１引言铝在自然界中分布极广，研究表明过量地摄入铝对人体会产生毒性作用。因此，对水中铝含量的监测已成为环境化学中的重要课题。作者采用示波技术与库仑滴定相结合的示波库仑滴定法测定水中Ａｌ３＋含量。方法以过量８－羟基喹啉沉淀Ａｌ３＋，以电生Ｂｒ２反滴定过量的８－羟基喹啉，用两铂电极示波电位法指示终点。水中少量的Ｃａ２＋、Ｍｇ２＋分别以ＣａＣＯ３、Ｍｇ（ＯＨ）２沉淀分离。操作方便、终点指示灵敏、准确。可检测水中含Ａｌ３＋量～１０６ｍｏｌ／Ｌ。２实验部分２．１仪器与试剂ＳＲ－０７ｌＢ型双踪示波器（江苏杨中…     

三(8-羟基喹啉根)合铝(Ⅲ)配合物的萃取和高效液相色谱分析

Al与 8羟基喹啉反应生成的黄色三（ 8羟基喹啉根）合铝 ?配合物,用氯仿萃取,在 C8烷基键合固定相上,以甲醇乙酸乙酯水 (体积比 40∶ 20∶ 40)为流动相,于 390 nm处测定。拟定了金属配合物的萃取高效液相色谱法,对萃取条件和萃取百分率,色谱分离条件进行了研究。进行了饮用水中总 Al的含量（ 20～ 700μ g· L－ 1）的测定,讨论了测定的灵敏度、选择性和重现性。     

酸性媒染紫—示波计时电位法测定天然水不同形态铝

本文报道酸性媒染紫（SVRS）一示波计时电位法测定天然水中不同形态铝。对24个实际水样分别在酸性pH5.2测定了无机单核铝Ali和碱性pH8.8底液中测定总单核铝Ala,有机单核铝Al0-Ala-Alio同时还应用该法测定了酸化水样中总铝AlT,酸溶态铝AlT=AlT-Ala,从而实现了水样中五种形态铝的电化学测定,测定值与Driscoll方法进行了比较对照,结果基本一致。本法特点为：简便快捷,灵敏准确,可以直接测定与铝毒性密切相关的无机单核铝Ali,无需分离步骤,水样用量小,适用于大批量天然水样中Al形态的快速分析。     

偶氮胂酸型荧光试剂测定铝的研究

比较了５种新试剂及偶氮胂－Ｉ的铝铬合物的荧光性能，讨论了试剂结构与性能之间的关系。试验出７－〔（４－甲基－２－胂酸基苯）偶氮〕－８－羟基喹啉－５－磺酸为铝的优良荧光试剂，并用其测定茶叶、含茶叶饲料，以及大白鼠排泄物中的铝和水样中的铝，结果满意。     

8－羟基喹啉铝掺杂聚乙烯基咔唑薄膜的光致发光及电致发光

８－羟基喹啉铝掺杂聚乙烯基咔唑薄膜的光致发光及电致发光马於光,唐建国,沈家骢,刘式墉（吉林大学分子光谱与分子结构开放实验室,集成光电子学国家联合重点实验室,长春,１３００２３）关键词聚合物,光致发光,电致发光,８－羟基喹啉铝某些有机染料作为波长转换介...     

用聚乙二醇—硫酸铵—铝试剂体系萃取分离铁（Ⅲ）铝（Ⅲ）,铜（Ⅱ）钴（Ⅱ）…

研究了在聚乙二醇－硫酸铵－铝试剂体系中Ｆｅ（Ⅲ），Ａｌ（Ⅲ）、Ｃｕ（Ⅱ）、ＣｏⅡ）Ｃｄ（Ⅱ）Ｍｎ（Ⅱ）、Ｎｉ（Ⅱ）的萃取分离行为。结果表明，在ＰＨ５．０－６．５ＨＡｃ－ＮａＡｃ缓冲溶液中，Ｆｅ（Ⅲ）、Ａｌ（Ⅲ）可被ＰＥＧ相几乎完全萃取，而Ｃｕ（Ⅱ）、Ｃｏ（Ⅱ）Ｃｄ（Ⅱ）Ｍｎ（Ⅱ）基本上不被萃取，从而实现了Ｆｅ（Ⅱ）与Ｃｕ（Ⅱ）Ｃｏ（Ⅱ）Ｃｄ（Ⅱ）Ｍｎ（Ⅱ)及Ａｌ（Ⅲ）与Ｆｅ（Ⅲ）Ｃｏ（Ⅱ）、Ｃｕ（     

D－HQADMB分光光度法测定微量镉（Ⅱ）

研究了新显色剂４，４’－二［（８－羟基喹啉）偶氮］－３，３’－二甲基联苯（Ｄ－ＨＱＡＤＭＢ）与Ｃｄ（Ⅱ）的显色反应条件。在吐温－８０存在下的ｐＨ７．８～９．０的缓冲介质中，Ｃｄ（Ⅱ）与Ｄ－ＨＱＡＤＭＢ形成稳定的红色配合物，组成比为Ｃｄ（Ⅱ）＋Ｄ－ＨＱＡＤＭＢ＝１＋２，λｍａｘ＝５３０ｎｍ，表观摩尔吸光系数为７．２０×１０４Ｌ／ｍｏｌ·ｃｍ，Ｃｄ量在０～１．３μｇ／ｍＬ范围内符合比耳定律。用制定的方法测定矿样中的微量镉，结果满意。     

NHC-Adducts of Cyclopentadienyl-Substituted Alanes

The mono- and bis-iodo-substituted NHC-stabilized alanes (NHC) ⋅ AlH₂I and (NHC) ⋅ AlHI₂ offer a convenient entry for further substitution reactions at aluminum. Reactions of (NHC) ⋅ AlH₂I 1 – 4 with one equivalent of NaCp afforded the adducts (NHC) ⋅ AlH₂Cp 9 – 12 (NHC=Me₂Im^Me ( 9 ), iPr₂Im^Me ( 10 ), iPr₂Im ( 11 ), Dipp₂Im ( 12 )). Alane adducts with two Cp substituents (NHC) ⋅ AlHCp₂ 13 – 16 (NHC=Me₂Im^Me ( 13 ), iPr₂Im^Me ( 14 ), iPr₂Im ( 15 ), Dipp₂Im ( 16 )) were prepared by the analogous reaction of (NHC) ⋅ AlHI₂ 5 – 8 using two equivalents of NaCp. The unusual dimeric adducts ((NHC) ⋅ AlH₂Cp ⋅ CpMgI)₂ 17 – 19 (NHC=Me₂Im^Me ( 17 ), iPr₂Im^Me ( 18 ), iPr₂Im ( 19 )) were obtained from the reaction of 1 – 3 with MgCp₂.     

Irreversible Denaturation of Proteins through Aluminum‐Induced Formation of Backbone Ring Structures

A combination of ab initio calculations, circular dichroism, nuclear magnetic resonance, and X‐ray photoelectron spectroscopy has shown that aluminum ions can induce the formation of backbone ring structures in a wide range of peptides, including neurodegenerative disease related motifs. These ring structures greatly destabilize the protein and result in irreversible denaturation. This behavior benefits from the ability of aluminum ions to form chemical bonds simultaneously with the amide nitrogen and carbonyl oxygen atoms on the peptide backbone.     

Formation of aluminum nitrides in thermal plasmas

Aluminum nitride has been synthesized by evaporation of the aluminum anode of a free-burning atmospheric-pressure nitrogen arc. About 40% of the product was collected in the form of highly oriented polycrystalline aluminum nitride (from the gaseous phase) with a high deposition rate ( 1 m/s) and very low oxygen content (0.34%). The rest was deposited on the reactor walls as an ultrafine powder with an average particle diameter of 300 Å. Destructive and nondestructive tests on the powder and crystals were carried out to determine the morphology and purity of the materials. The impact of other gases on the AlN formation has been studied. The probable mechanism in the AlN crystal growth is discussed.     

Preparation of films from aluminum acetylacetonate by plasma sputtering

Aluminum acetylacetonate has been reported as a precursor for the deposition of alumina films using different approaches. In this work, alumina‐containing films were prepared by plasma sputtering this compound, spread directly on the powered lowermost electrode of a reactor, while grounding the substrates mounted on the topmost electrode. Radiofrequency power (13.56 MHz) was used to excite the plasma from argon atmosphere at a working pressure of 11 Pa. The effect of the plasma excitation power on the properties of the resulting films was studied. Film thickness and hardness were measured by profilometry and nanoindentation, respectively. The molecular structure and chemical composition of the layers were analyzed by Fourier transform infrared spectroscopy and energy dispersive spectroscopy. Surface micrographs, obtained by scanning electron microscopy, allowed the determination of the sample morphology. Grazing incidence X‐ray diffraction was employed to determine the structure of the films. Amorphous organic layers were deposited with thicknesses of up to 7 µm and hardness of around 1.0 GPa. The films were composed by aluminum, carbon, oxygen and hydrogen, their proportions being strongly dependent on the power used to excite the plasma. A uniform surface was obtained for low‐power depositions, but particulates and cracks appeared in the high‐power prepared materials. The presence of different proportions of aluminum oxide in the coatings is ascribed to the different activations promoted in the metalorganic molecule once in the plasma phase. Copyright © 2013 John Wiley & Sons, Ltd.     

Activation of Dihydrogen by Masked Doubly Bonded Aluminum Species

Activation of dihydrogen by masked dialumenes (Al=Al doubly bonded species) is reported. Reactions of barrelene‐type dialumanes, which have the reactivity as masked equivalents of 1,2‐diaryldialumenes ArAl=AlAr, with H₂ afforded dihydroalumanes ArAlH₂ at room temperature (Ar: bulky aryl groups). These dihydroalumanes form hydrogen‐bridged dimers [ArHAl(μ‐H)]₂ in the crystalline state, while a monomer–dimer equilibrium was suggested in solution. The 1,2‐diaryldialumenes generated from the barrelene‐type dialumanes are the putative active species in the cleavage of H₂.     

Stereoselective alkynylation of trans-2,3-epoxy sulfides with double inversion of configuration by alkynylaluminums

A stereoselective alkynylation reaction of rans-1-phenylthio-2,3-epoxyalkanes with alkynylaluminums which proceeds via episulfonium ions, that is, with double inversion of configuration, has been developed.     

新型高硅Y(NHSY)沸石的研究:Ⅱ.NHSY沸石的结构特点

用ＩＲ，ＸＰＳ，ＴＥＭ，低温氮吸附和化学分析等手段表征了ＮＨＳＹ沸石的结构特点，结果表明，ＮＨＳＹ具有Ａｌ分布均匀，骨架Ａｌ空位少、含非骨架Ａｌ少而适量和二次孔体系发达等显著特点，这些特点使ＮＨＳＹ具有很好的结构稳定性和很高的催化活性及选择性。     

Study on the In-situ Synthesis of Aluminum Titanate Sintered by Waste Aluminum Slag

Aluminum titanate was in-situ synthesized by using industrial waste-residue in the aluminum factory and TiO2 as the main raw materials and the influence of different reaction temperatures on the purity and microstructures of synthesized products were mainly discussed. The obtained Al2TiO5 was characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM） and relevant analytical software. The results show that elevating the sintering temperature can increase the content of aluminum titanate; and at 1420 ℃, it reaches the highest in the synthesized ceramic. When the sintering temperature continues to increase, the produced aluminum titanate will decompose resulting in the drop of its content. Therefore, the optimum sintering temperature of in-situ synthesis of aluminum titanate is determined as 1420 ℃, at which the grains of aluminum titanate grow completely, the purity of aluminum titanate is 89.3wt%., the highest density is 2.75 g/cm^3, and the porosity is 9%.