7─（4─磺苯基偶氮）─8─羟基喹啉用作钴的新光度试剂及其用于VB_（12）的间接分光光度测定

合成了题述试剂ＳＰＡＨＱ，可用其作钴显色剂。生成的红棕色１：４（Ｃｏ：ＳＰＡＨＱ）螯合物λｍａｘ＝４８０ｎｍ，ε４８０＝８．１×１０４Ｌ·ｍｏｌ－１·ｃｍ－１，Δλ＝９０ｎｍ。０～１．２μｇ／ｍＬＣｏ２＋遵守比尔定律。１～１０ｍｇ的７种离子和０．０３５～０．９４ｍｇ的１８种离子不干扰。用于间接分光光度测定ＶＢ１２，结果与亚硝基Ｒ盐法一致。本法既灵敏、选择性也好。     

5－Br－TAR的合成及其在反相HPLC分离测定Co（Ⅱ）、Cr（Ⅵ）、Rh（Ⅲ）中的应用

以合成的新试剂５－Ｂｒ－ＴＡＲ为往前衍生试剂，首次用阴离子表面活性剂Ｓ，Ｄ．Ｓ．为对离子试剂。以含１×１０（－２）ｍｏｌ·Ｌ（－１）的ｐＨ５．８的乙酸－乙酸钠缓冲溶液和３．５×１０（－４）ｍｏｌ·Ｌ（－１）的Ｓ．Ｄ．Ｓ．的甲醇－水（６８：３２，Ｖ／Ｖ）为流动相，在Ｃ（１８）柱上，１５ｍｉｎ内分离测定了Ｃｏ（Ⅱ）、Ｒｈ（Ⅲ）、Ｃｒ（Ⅵ）的５－Ｂｒ－ＴＡＲ配合物。当ＳＮＲ＝２时，检出限分别为０．４９、０．３２、０．４４ｐｐｂ。用于废水及电镀液中Ｃｏ（Ⅱ）、Ｃｒ（Ⅵ）的测定，效果较好。     

以2─（2′，4＇，6＇─三羟苯基偶氮）苯胂酸光度法测定铁（Ⅲ）

研究了新试剂２－（２＇，４＇，６＇－三羟苯基偶氮）苯胂酸（ＴＰＢＡ）与铁（Ⅲ）的显色反应。结果表明，铁（Ⅲ）与试剂在ｐＨ４．４的ＨＣｌ－ＮａＡｃ介质中发生专一显色反应，生成１：２棕红色配合物，其最大吸收位于５３５ｎｍ，摩尔吸光系数为４．２２×１０３Ｌ·ｍｏｌ－１·ｃｍ－１，线性范围为０～３μｇ／ｍＬ。拟定的方法选择性很高，可直接用于较复杂样品如土壤中总铁的测定。又由于５倍量Ｆｅ（Ⅱ）的共存不干扰，方法尚适用于Ｆｅ（Ⅲ）－Ｆｅ（Ⅱ）体系中Ｆｅ（Ⅲ）的选择性价态分析。分析结果均令人满意。     

水中微量铝的直接测定──Al（Ⅲ）─CAS─CPB─TritonX─100混合胶束增溶分光光度法

在ＰＨ５．３～７．１的六次甲基四胺缓冲溶液中，Ａｌ（Ⅲ）—ＣＡＳ—ＣＰＢ—ＴｒｉｔｏｎＸ—１００络合物的最大吸收波长为６３０ｎｍ，ε＝１．１０ｘ１０￣５Ｌ．ｍｏｌ￣（－１）．ｃｍ￣（－１），摩尔组成比Ａｌ（Ⅲ）：ＣＡＳ：ＣＰＢ＝１：３：３，铝量在０．２～８μｇ／２５ｍｏｌ范围内符合比尔定律，回收率９９～１０４％。本法以盐酸羟胺和邻菲啉作联合掩蔽剂，常见金属离子干扰少，用本法测定自来水、废水中微量铝，结果令人满意。     

Pd~(2+)-I~--TBAB三元缔合物萃取光度法测定钯含量

介绍了Ｐｄ２＋－Ｉ－－ＴＢＡＢ（四丁基溴化铵）三元缔合物萃取光度法测定钯的方法。该方法以Ｌ（＋）抗坏血酸作为掩蔽剂，干扰离子Ｃｕ２＋，Ｆｅ３＋的允许量均为２．５μｇ／ｍＬ，Ｐｄ２＋浓度为０～４μｇ／ｍＬ，完全符合比耳定律（萃取剂作参比），方法的相关摩尔吸光系数ε为２．０９×１０４Ｌ／（ｍｏｌ·ｃｍ），桑德尔灵敏度Ｓ为５．０７×１０－３μｇ／ｃｍ２。工作曲线的应用范围为１～４μｇ／ｍＬ。     

新试剂2－［2－苯并噻唑偶氮］－1，8－二羟基萘－3，6－二磺酸与铁的显色反应及应用研究

报道了作者新近合成的显色剂与Ｆｅ（Ⅲ）的显色反应。在ＣＴＭＡＢ存在下，Ｆｅ（Ⅲ）与试剂在ｐＨ５．６的缓冲溶液中形成稳定的深紫红色三元配合物，其组成为１：２：１，最大吸收波长为６５５ｎｍ，表观摩尔吸光系数达１．０５×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，灵敏度高，选择性好。Ｆｅ（Ⅲ）含量在０～１０μｇ／２５ｍＬ范围内服从比尔定律。应用于石灰石、镁砂、铝合金及水样中微量Ｆｅ（Ⅲ）的测定，结果满意。     

新荧光试剂3─苯基─5─（4′─硝基─2′─羧基苯偶氮）─2─硫代─4─噻唑啉酮的合成及其应用研究

报道了新荧光试剂３－苯基－５－（４′－硝基－２′－羧基苯偶氮）－２－硫代－４－噻唑啉酮（３Ｐ－４ＮＲＡＣＰ）的合成，通过元素分析、红外光谱、核磁共振谱及质谱确证了其结构。在ｐＨ５．６时，它与铜（Ⅱ）形成稳定的荧光螫合物，在γｅｘ／λｅｍ＝３０５ｎｍ／４０５ｎｍ处产生强荧光，其荧光强度与铜（Ⅱ）的浓度在１．５７×１０－１０～１．８９×１０－８ｍｏｌ／２５ｍＬ范围内呈线性关系，灵敏度达１．５７×１０－１０ｍｏｌ／ｇ的铜（Ⅱ）。用此方法测定了杂交米、糯米及香米中的痕量铜（Ⅱ），结果满意。     

Mo（Ⅵ）与Tiron的显色反应及应用研究

研究了Ｍｏ（Ⅵ）与Ｔｉｒｏｎ的反应，发现在ｐＨ４．０的ＨＡｃ－ＮａＡｃ介质中形成１：１配合物，该配合物在２５２ｎｍ、３１５ｎｍ有两个吸收峰，而在可见光区无吸收峰。测得ε２５２＝６．９×１０￣３Ｌ·ｍｏｌ－１·Ｃｍ－１，ε３１５＝３．５×１０３Ｌ·ｍｏｌ－１·Ｃｍ－１。据此建立了测定Ｍｏ（Ⅵ）的方法，在２５２ｎｍ和３１５ｎｍ处的线性范围分别为１．６×１０－６ｍｏｌ·Ｌ－１～２．Ｏ×１０－４ｍｏｌ·Ｌ－１和３．２×１０－４ｍｏｌ·Ｌ－１～２．０×１０－４ｍｏｌ·Ｌ－１。检出限分别为８．Ｏ×１０－７ｍｏｌ·Ｌ－１和１．６×１０－６ｍｏｌ·Ｌ－１．ＰＯ＿４￣３＋、ＳｉＯ＿３￣２－对测定无干扰，而Ｗ（Ⅵ）、Ｖ（Ⅴ）、Ｆｅ（Ⅲ）等有干扰。该法试用于有机磷合钼聚多酸盐样品的测定，结果满意，方法回收率９６％～１０２％，变异系数≤１．ｌ％（ｎ＝１２）。     

Rh（Ⅲ）－TAC－CTMAB体系分光光度法测定Rh的研究

研究了在阳离子表面活性剂十六烷基三甲基溴化铵（ＣＴＭＡＢ）存在下，用２－（２一噻唑偶氮）－对甲酚（ＴＡＣ），在ｐＨ５．０的ＨＡｃ－ＮａＡｃ缓冲液中分光光度法测定Ｒｈ。Ｒｈ（Ⅲ）与ＴＡＣ的络合比为１：１，表观摩尔吸光系数为ε６８０ｎｍ＝１．２５×１０４Ｌ·ｍｏｌ－１·ｃｍ－１，在１．２～８μｇ／１０ｍＬ范围内符合比尔定律。方法的特征灵敏度为０．０８５μｇ／ｍＬ（１％吸收）。试验了贵金属及常见金属的干扰情况，并研究了干扰消除的方法，ＥＤＴＡ的加入可以消除一定量的Ｃｕ、Ｃｏ、Ｎｉ、Ｚｎ的干扰。对催化剂试样的分析结果令人满意，变异系数均小于３％。     

新显色剂4—（2—吡啶偶氮）—邻苯二酚吸光光度法测定微量Hg（Ⅱ）

研究了新显色剂４－（２－吡啶偶氮）－邻苯二酚（ＰＡＣＰ）与Ｈｇ（Ⅱ）的显色反应。在阳离子表面活性剂溴化十六烷基三甲胺（ＣＴＭＡＢ）及ｐＨ＝９．５ＮＨ３－ＮＨ４Ｃｌ缓蚀溶液中,试剂与Ｈｇ（Ⅱ）反应生成稳定的红色配合物,其最大吸收波长为５０３ｎｍ,表观摩尔吸光系数为３．０×１０＾５Ｌ·ｍｉｌ＾－１·ｃｍ＾－１,汞含量在０～３．０×１０＾－６ｍｌｏ·Ｌ＾－１范围内服从比耳定律,该方法应用于合成样和废水中     

水镁石、水菱镁石和斜方云石资源、加工与应用

对水镁石、水菱镁石和斜方云石资源及其加工和应用进行了评述。包括上述资源的发展历史、化学组成和物性参数、资源储量和矿石品位、生产加工以及在不同领域(如镁质阻燃剂、中和剂、重金属离子脱除剂、镁肥、饲料添加剂等)的应用,并对它们的发展前景进行了展望。     

Chemistry of Lipoquinones: Properties,Synthesis, and Membrane Location of Ubiquinones,Plastoquinones, and Menaquinones

Lipoquinones are the topic of this review and are a class of hydrophobic lipid molecules with key biological functions that are linked to their structure, properties, and location within a biological membrane. Ubiquinones, plastoquinones, and menaquinones vary regarding their quinone headgroup, isoprenoid sidechain, properties, and biological functions, including the shuttling of electrons between membrane-bound protein complexes within the electron transport chain. Lipoquinones are highly hydrophobic molecules that are soluble in organic solvents and insoluble in aqueous solution, causing obstacles in water-based assays that measure their chemical properties, enzyme activities and effects on cell growth. Little is known about the location and ultimately movement of lipoquinones in the membrane, and these properties are topics described in this review. Computational studies are particularly abundant in the recent years in this area, and there is far less experimental evidence to verify the often conflicting interpretations and conclusions that result from computational studies of very different membrane model systems. Some recent experimental studies have described using truncated lipoquinone derivatives, such as ubiquinone-2 (UQ-2) and menaquinone-2 (MK-2), to investigate their conformation, their location in the membrane, and their biological function. Truncated lipoquinone derivatives are soluble in water-based assays, and hence can serve as excellent analogs for study even though they are more mobile in the membrane than the longer chain counterparts. In this review, we will discuss the properties, location in the membrane, and syntheses of three main classes of lipoquinones including truncated derivatives. Our goal is to highlight the importance of bridging the gap between experimental and computational methods and to incorporate properties-focused considerations when proposing future studies relating to the function of lipoquinones in membranes.     

Stable silyl, germyl, and stannyl cations, radicals, and anions: heavy versions of carbocations, carbon radicals, and carbanions

The rapidly growing chemistry of the cations, radicals, and anions based on the group 14 elements heavier than carbon (Si, Ge, Sn, and Pb) is one of the most important organometallic fields. Recent developments in this research area moved such species from the class of short-lived reactive intermediates to the class of easily accessible, isolable, and fully characterizable compounds. In this Account, we deal with the major accomplishments in the field of the stable representatives of "heavy" cations, radicals, and anions.     

Breaking, making, and twisting of chemical bonds in gas, liquid, and nanocavities

In this Account, we recount on our studies of 1'-hydroxy-2'-acetonaphthone (HAN, a proton transfer prototype molecule) in gas, solutions, and nanocavities. The internal H-bond photoreaction in HAN leads to a keto type structure, and following its formation, an internal twisting motion gives birth to keto rotamers. Theory, temperature, and solvent effects on its photodynamics show the involvement of efficient radiationless processes in both keto structures. When HAN is caged in a cyclodextrin nanocavity, the spectroscopy, photodynamics, and issues of twisting motion are strongly affected and could be tuned: a behavior relevant to those of many chemical and biological systems.     

Thermoplastic processing,rheology, and extrudate properties of wheat,soy, and pea proteins

Plant protein isolates (wheat gluten, soy, and pea protein) were treated in a thermoplastic extrusion process, yielding protein based bioplastic material. The application of glycerol as plasticizer in amounts of 50–67% of total mass and high temperatures above 140°C led to smooth and homogeneous extrudates. Viscosity measurements of the protein melt under extrusion conditions confirmed the thermoplastic behavior, obeying the power law with power law indices of 0.31‐0.4. Chemical changes in the material were qualitatively shown by amino acid analysis and fluorescence measurement. High moisture sensitivity and low mechanical stability of the extrudates, as determined by solubility, water vapor permeability, sorption isotherms, and tensile strength, can be partially ascribed to the high glycerol content. The application of pure protein bioplastics for technical purposes, e.g., as packing material, is discussed on basis of the presented data considering stability, appearance, and long time storage. POLYM. ENG. SCI., 55:1912–1919, 2015. © 2014 Society of Plastics Engineers     

Electrical,spectroscopic, and thermal properties of blends formed by PEDOT,PVC, and PEO

This study describes the preparation of blends between an amorphous polymer (PVC) and a crystalline polymer (PEO), with a third polymeric part that presents electronic conduction capacity (PEDOT‐PSS). Binary (PEO/PVC, PEO/PEDOT‐PSS, PVC/PEDOT‐PSS) and ternary (PVC/PEO/PEDOT‐PSS) blends were prepared by changing the concentrations of the constituents and were analyzed by electronic conductivity, Raman spatial resolution, infrared spectroscopies, and thermogravimetric analysis. The Raman and FTIR analyses showed the incorporation of PEDOT‐PSS within the blends. The higher conductivity presented by the ternary blend was 8.6 × 10^?6 Scm^?1, composed of 24% of PVC, 16% of PEO, and 60% of PEDOT‐PSS. For binary blends the conductivity was proportional to the PEDOT‐PSS content. The thermal stability could be observed through the TG curves of the blends that presented an increase of 19 K in the weight loss temperature at the 10% level when compared to the pure components. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 96: 1710–1715, 2005