笼形聚偕氨肟树脂吸附溴和碘

用酸、碱处理的笼形聚偕氨肟树脂（ACAO、BCAO）吸附溴和碘,发现它们的吸附能力无显著差别。吸附客量与溴和碘浓度关系符合Freundlich方程．从扫描电子显微镜观察到碘在树脂表面形成微晶．联系到溴和碘的超当量吸附现象,初步认为,它们是通过物理吸附在树脂表面富集。     

笼形聚偕胺肟树脂的研究─—卤素及其化合物在树脂上的吸附

考查了碱处理笼形聚偕胺肟树脂（BCAO）和乙酸、硝酸或盐酸处理的笼形聚偕胺肟树脂（HOAC／ACAO、HNO。／ACAO、HCI／ACAO）对卤化物、卤酸盐和卤素的吸附行为。发现BCAO和HOAC／ACAO不吸附卤化物和卤酸盐；HNO3/ACAO和HCl/ACAO对两类化合物则表现出不同的吸附能力。BCAO和ACAO均吸附溴和碘，并符合Freundlich和Langmuir等温吸附方程。研究了溴在BCAO上的吸附动力学，讨论了吸附机理。     

交流示波极谱滴定法在药物分析中的应用（Ⅵ）

引言 司可巴比妥钠是催眠药。利尿酸、利尿酸钠是利尿药。盐酸去氧肾上腺素是升压药。苯酚是消毒防腐药。对这四类药物的含量测定文献报道为溴量法,其片剂测定方法为萃取溴量法。以碘-淀粉兰色消失为终点,淀粉宜在终点前加入,否则会因淀粉对碘的吸附而增加误差,萃取溴量法不仅操作烦琐而且还消耗有机溶剂。     

发给素基磁性聚偕胺肟树脂的研究：溴在树脂上的吸附动力学

研究了酸式和碱式纤维基磁性聚偕胺肟树脂对溴的吸附行为。结果表明，吸附速度不但受控于粒内扩散，也受质量作用的影响。ＢＭＡＯ吸溴量溴浓度有关，符合Ｆｒｅｕｎｄｌｉｃｈ和Ｌａｎｇｍｕｉｒ等温吸附方程。     

金属离子在煤界面吸附对煤成浆性的影响

本文研究了六种金属离子在三种煤表面的吸附规律，研究结果表明：铜离子能够改善煤的制浆效果，即铜离子加入煤浆中，分散剂的用量降低５０％，煤浆浓度提高；钙、镁、钴、锌离子对煤的成浆性不利的原因是它们不能有效地被吸附到煤表面，游离的金属离子和分散剂发生反应，使得吸附到煤表面的分散剂相对减少，煤的成浆性变差。     

三峰三波长动力学法测定微量溴和碘及其机理研究

本文利用“溴酸盐氧化溴代邻苯三酚红”为指示反应，根据溴或碘离子的浓度与指示反应速度之间的定量关系，用分光光度计扫描，动力学多波长测定微量溴或碘的含量，并对反应机理作了初步探讨。     

三峰三波长动力学测定微量溴和碘及其机理研究

本文利用“溴酸盐氧化溴代邻苯三酚红”为指示反应，根据溴或碘离子的浓度与指示反应速度之间的定量关系，用分光光度法扫描，动力学多波长测定微量溴或碘的含量，并对反应机理作了初步探讨。     

不同水煤浆分散剂与煤之间的相互作用规律研究: Ⅹ 分散剂在煤粒表面上的吸附作用特征

研究了6种水煤浆分散剂在14种不同变质程度煤上的吸附作用特征。结果表明，多数分散剂在煤粒表面达到单层饱和吸附后，又形成多层吸附，单层饱和吸附量与煤的变质程度、比表面积以及分散剂的性质有关。在相同粒度分布下，煤的变质程度越低，表面含氧亲水官能团的比例越高，孔隙率越高，比表面积越大，这对增大吸附量有利。煤的变质程度越高，其表面疏水区面积的比例越高，分散剂通过疏水基团紧密吸附在煤表面的比例越大，这对增加高阶煤的吸附量有利。对不同煤，是变质程度还是比表面积为吸附分散剂的主控因素，主要依赖于分散剂的结构与性质。对同种煤，疏水与亲水基团呈线型分立分布的分散剂，吸附量明显高；而疏水与亲水基团呈线型间隔分布的分散剂，吸附量明显小。     

具有灭菌功能活性碳纤维的研究

本文用浸渍法制备了两种具有灭菌功能的吸附材料；载银活性碳纤维和载碘活性碳纤维。通过对其形貌、晶体结构，吸附特性，灭菌能力的观察和测定，研究了载银、载碘对活必纤维性能的影响。结果表明，载银、载碘之后最显著的变化是其灭菌能力的提高，而且其形貌，晶体结构、吸附特性均未发生明显改变。     

Bi2S3对有机溶剂中碘的吸附性能研究

含铋材料相比于含银碘吸附剂具有制备成本低、碘吸附容量高，吸附速率快等优点，在含碘废物的处理领域具有潜在的应用价值。本文以二甲亚砜和水作溶剂，五水硝酸铋和硫粉为原料制备Bi₂S₃。并以它作为碘吸附剂，研究其对环己烷中I₂的吸附性能。吸附动力学拟合数据表明，Bi₂S₃对I₂的吸附服从准二级动力学方程，主要为化学吸附。Bi₂S₃对I₂的最大吸附容量可达2234 mg/g。由扫描电子显微镜和X-射线衍射光谱分析结果可知，I₂被Bi₂S₃成功吸附，所吸附的I₂主要以BiI₃和BiOI的形式存在。此工作表明含铋材料在含碘废物的处理领域具有潜在的应用价值。     

二氧化碳和丙烯直接合成甲基丙烯酸的NiPMo/TiO2催化剂的研究

用溶胶-凝胶法以磷钼酸(MPA)的镍盐溶液水解钛酸四丁酯制备了NiPMo/TiO2催化剂.使用ICP、 XRD、 TG-DTA、 IR、 TPD-MS和微反应技术研究了催化剂的化学组成、热稳定性、化学吸附性质和催化反应性能.杂多钼酸盐与TiO2通过O2-在TiO2表面发生了键合.在623 K下,杂多阴离子仍保持原有的Keggin结构.CO2在Lewis酸位Ni(Ⅱ)和Lewis碱位Ni-O-Mo的桥氧协同作用下生成CO2卧式吸附态Ni(Ⅱ)←O-(CO)←(O--Ni).丙烯有多种吸附态在催化剂上吸附.在563 K、 1 MPa和空速1500 h-1的反应条件下,丙烯的摩尔转化率为3.2%,产物MAA选择性为95%.     

Synthesis of 1-benzyloxypyrazin-2(1H)-one derivatives

Different approaches for the synthesis of 1-benzyloxypyrazin-2(1H)-one derivatives from simple amino acids have been investigated. A library of 33 precursors for the preparation of N-hydroxy pyrazinones was obtained in moderate to good yields.     

Toward new camptothecins. Part 6: Synthesis of crucial ketones and their use in Friedländer reaction

In the context of the preparation of camptothecin and luotonin A analogs, the synthesis of some key keto-precursors and their use in Friedländer condensation are described. This paper also focuses on the stability of these keto intermediates and emphasizes the major differences between indolizinones and pyrroloquinazolinones series. Noteworthy is also the report of some original structures isolated as by-products of some experiments.     

CoFe2O4自形成磁性液体场致结构化对磁化的影响

The Langevin paramagnetic theory can’t describe the relation between magnetization of ferrofluids and applied magnetic field. The structuralization of ferrofluids, which is considered the main influence factor of the magnetization, is regarded. The part of magnetization works is deposited when the structure is forming. This action influences the magnetization of ferrofluids directly or indirectly. On the base of the “compressing” model, the Langevin function that usually describes the magnetization of ferrofluid is modified, and a well-fitted curve is obtained. An equation of the relation between the equivalent volume fraction after being “compressed” and the intensity of magnetic field is discovered, which approximately describes the process of magnetization. The relation between the approximate initial susceptibility and the volume fraction can be obtained from modified formula.     

Highly regioselective Buchwald–Hartwig amination at C-2 of 2,4-dichloropyridine enabling a novel approach to 2,4-bisanilinopyridine (BAPyd) libraries

The highly regioselective Buchwald–Hartwig amination at C-2 of the cheap and readily accessible reagent, 2,4-dichloropyridine with a range of anilines and heterocyclic amines is described. This new methodology is robust and provides a facile access to 4-chloro-N-phenylpyridin-2-amines on 0.25 mol scale. These intermediates undergo a further Buchwald–Hartwig amination at higher temperature to enable rapid exploration of the chemical space at C-4 and to provide a library of 2,4-bisaminopyridines.     

KMnO4-mediated oxidative CN bond cleavage of tertiary amines: Synthesis of amides and sulfonamides

KMnO₄-mediated oxidative CN bond cleavage of tertiary amines producing secondary amine was introduced, which was trapped by electrophiles (acyl chloride and sulfonyl chloride) to form amides and sulfonamides. The reaction could take place at mild condition, tolerating a wide range of function groups and affording products in moderate to excellent yields.     

Chemistry of heterocyclic compounds at the A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, over 50 years (Review)

The review contains a concise historical account and information on the most significant researches undertaken by the staff at the A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences on the Chemistry of Heterocyclic Compounds. Dedicated to Academician of the Russian Academy of Sciences B. A. Trofimov on his 70th jubilee. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1443–1502, October, 2008.     

Sulfur-directed metal-free and regiospecific methyl C(sp3)–H imidation of thioanisoles

Regiospecific and direct imidation of the methyl C(sp³)–H bond of thioanisoles is realized under mild and metal-free conditions with N-fluorobis(benzenesulfonyl)imide as an oxidant and nitrogen source. Proposed mechanism suggests that thionium ion intermediates and a Pummerer-type reaction are involved. The imidation has advantages such as high step-economy, excellent functionality tolerance, and regiospecificity, giving structurally diverse imidation products.     

A general and convenient synthesis of 4-(tosylmethyl)semicarbazones and their use in amidoalkylation of hydrogen,heteroatom, and carbon nucleophiles

A general synthesis of previously unknown semicarbazone-based α-amidoalkylating reagents, 4-(tosylmethyl)semicarbazones, has been developed. The synthesis involved three-component condensation of semicarbazones of aliphatic or aromatic aldehydes with the same or other aldehydes and p-toluenesulfinic acid. The scope and limitations of this reaction were investigated. The compounds obtained were demonstrated to be an efficient α-(4-semicarbazono)alkylating agents. They were reacted with H- (sodium borohydride), O- (sodium methylate), S- (sodium phenylthiolate), N- (pyrrolidine, sodium succinimide), P- (trialkyl phosphites), and C-nucleophiles (sodium diethyl malonate) to give the corresponding products of the tosyl group substitution, 4-substituted semicarbazones, including analogues of nitrofurazone. Among the prepared compounds tested in vitro for antibacterial and antifungal activity, three nitrofuryl-containing semicarbazones exhibited high biological activities with minimum inhibitory concentration (MIC) values of 8–32 μg/mL.     

Synthesis of novel chiral bidentate hydroxyalkyl-N-heterocyclic carbene ligands and their application in palladium-catalyzed Mizoroki–Heck couplings and asymmetric addition of diethylzinc to benzaldehyde

A small library of new chiral bidentate hydroxyalkyl-imidazolium salts 1 is conveniently synthesized on multi-gram scale from inexpensive and commercially available chiral pool amino acids. The corresponding carbenes, generated by deprotonation of imidazolium salts 1, in combination with palladium(II) chloride were tested in the Mizoroki–Heck coupling reaction. The most significant results in terms of yields and reactivities were achieved with low catalyst loading. The catalytic activities of these imidazolium salts were also investigated in the asymmetric addition of diethylzinc to benzaldehyde. The use of MgO nanoparticles as an additive in conjunction with these ligands played a crucial role in increasing the efficiency of these reactions.