主链含PEO链段的聚对苯乙炔类蓝色电致发光共聚物

采用Ｗｉｔｔｉｇ反应合成了一种分子主链上烷氧基取代刚性共轭聚对苯乙炔（ＰＰＶ）民柔性聚氧化乙烯（ＰＥＯ）链段交替排列的、可溶于氯仿与四氢呋喃等普通有机溶剂的新型结构的聚对苯乙炔类功能性发光共聚物ＥＯ－ＰＰＶ。采用ＦＴ－ＩＲ、＾１Ｈ－ＮＭＲ、ＤＳＣ、ＧＰＣ、元素分析等手段对共聚物进行了表征,并制备了结构为（Ａｌ）Ｃａ／ＥＯ－ＰＰＶ／ＩＴＯ的单层电致发光器件、器件的最大发光波长位于４７５ｎｍ（蓝光）。     

1,4—双（氯甲基）—2—甲氧基—5—壬氧基苯的均聚和共聚研究

以１，４－双（氯甲基）－２，５一二甲基苯（ＢＣＭＤＭＢ）和１，４－双氯甲基－２－甲氧基－５－壬氧基苯（ＢＣＭＭＯＮＯＢ）为单体，采用脱氯化氢法，合成了聚（２，５－二甲基）对亚苯基亚乙烯（ＰＤＭＰＶ）和聚（２－甲氧基－５－壬氧基）对亚苯基亚乙烯（ＰＭＯＮＯＰＶ）；并对ＢＣＭＤＭＢ和ＢＣＭＭＯＮＯＢ的共聚进行了研究。结果表明，适宜的反应条件为：碱与单体的摩尔比为２０∶１，在室温下聚合时间为３０ｈ，碱的ｐＨ＝１４时产率最高。用ＩＲ、１Ｈ－ＮＭＲ、ＵＶ—Ｖｉｓ对聚合物进行了表征。     

铽与4—酰代吡唑啉酮—5的三元配合物的合成与荧光性质

合成并表征了一系列铽与含不同４－酰代的１－苯基－３－甲基－吡唑啉酮－５的三元配合物Ｔｂ９Ｌ）３．２Ｈ２Ｏ和Ｔｂ（Ｌ）３．Ｄｉｐｙ「Ｌ＝１－苯基－３－甲基－４－乙酰基吡啥林酮－５（ＰＭＡＰ），１－苯基－３－甲基－４－丙酰基吡唑啉酮－５（ＰＭＰＰ），１－苯基－３－甲基－４－异丁酰基吡唑啉酮－５（ＰＭＩＢＰ），１－苯基－３－甲基－４－特戊酰基吡唑啉酮－５（ＰＭＰＶＰ），１－苯基－３－甲基－４－苯甲酰基吡     

两种[对苯乙炔—2,5—二（十二烷氧基）对苯乙炔]共聚物的合？…

用含氯前聚物路线和Ｈｅｃｋ反应分别合成「对苯乙炔－２，５－二（十二烷氧基）对苯乙炔」无夫共聚物及交替共聚物，由元素分析，凝胶渗透色谱，吸收光谱及ＤＳＣ对其进行了表征，研究了共聚物的组成与导电率，溶解性及发光性能的关系。     

两种[对苯乙炔-2,5-二(十二烷氧基)对苯乙炔]共聚物的合成及性能研究

用含氯前聚物路线和Ｈｅｃｋ反应分别合成［对苯乙炔－２，５－二（十二烷氧基）对苯乙炔］无规共聚物及交替共聚物．由元素分析、凝胶渗透色谱、吸收光谱及ＤＳＣ对其进行表征，研究了共聚物的组成与导电率、溶解性及发光性能的关系．比较了无规共聚物与交替共聚物在性能上的差别．     

聚（2,5—二甲氧基对苯乙炔）的可溶性前聚物合成及表征

研究了合成聚（２，４－二甲氧基对苯乙炔）的有机可溶性前聚物的反应条件与单体转化率和前聚物产率的关系。实验结果表明：ＮａＯＨ是聚合反应的有效引发剂，适宜的反应条件为：单体与ＮａＯＨ摩尔比为１：１，单体浓度０．０５－０．２ｍｏｌ／Ｌ，聚合时间２ｈ，温度低５℃，正己烷、石油醚作为有机提取剂可有效提高前聚物产率。用ＩＲ、ＵＶ－Ｖｉｓ＇＾ＨＮＭＲ，ＴＧＡ和 ＤＳＣ对前聚物进行了表征。     

功能聚间苯二胺膜用于免疫传感器分析

以电化学聚合法在石墨电极上获得聚间苯二胺膜（ＰＭＰＤ），并建立了快速、灵敏的膜质量检验方法：辣根过氧化物酶（ＨＲＰ）标记ＰＭＰＤ膜－邻苯二胺（ＯＰＤ）反应法，对聚合、活化等条件作了研究；进一步制成了检测乙肝表面抗原（ＨＢｓＡｇ）和检测鼠免疫蛋白（ＭＩｇＧ）的免疫电极，对血清样品作了检测．结果表明：２．５Ｖ电池电压下，于含０．１２ｍｏｌ／ＬＭＰＤ的１．２ｍｏｌ／ＬＨ２ＳＯ４中聚合２０ｍｉｎ，再以３０ｇ／Ｌ浓度的戊二醛活化４ｈ，所得ＨＲＰ标记电极及免疫电极重现性好；检测ＨＢ－ｓＡｇ和ＭＩｇＧ的线性范围分别为０．１～３．２ｍｇ／Ｌ及０．１～１０ｍｇ／Ｌ     

VOHPO4.0.5H2O的制备及活化和催化性能

用正戊醇和仲醇还原ＶＯＰＯ４．２Ｈ２Ｏ，以制备正丁烷氧化顺酐的Ｖ－Ｐ－Ｏ催化剂前驱物ＶＯＨＰＯ４．０．５Ｈ２Ｏ，并用ＸＲＤ，ＴＧ，ＳＥＭ对共进行了表征。结果表明，由正戊醇还原ＶＯＰＯ４．２Ｈ２Ｏ合成的前驱物ＶＯＨＰＯ４．０．５Ｈ２Ｏ的ＸＲＤ，在（２２）晶面衍射强度较强；而由仲戊醇合成的前驱物ＶＯＨＰＯ４．０．５Ｈ２Ｏ的ＸＤ，在（００１）晶面衍射强度较强。正戊醇还原ＶＯＰＯ４．２ＨＯ２合成的前驱物Ｖ     

去卤缩聚法合成蓝色电致发光聚合物聚（2,5—二庚基）对苯乙炔

利用双卤甲基苯衍生物在强碱诱导下的缩合反应，合成了共轭态可溶的聚对苯乙炔，并利用ＩＲ，ＵＶ－Ｖｉｓ，＾１Ｈ－ＮＭＲ，ＴＧＡ等对聚合物结构与性能进行了有征，其Ｎｎ＝０．４８×１０＾４。电致发光器件的发光峰值波长为４８６ｎｍ，起亮电压为２２Ｖ。     

4-乙烯吡啶型聚皂与表面活性剂相互作用的研究

１实验部分１１试剂Ｎ－乙基聚４－乙烯吡啶溴化盐（ＱＰＶＰＥ）和Ｎ－十二烷基聚４－乙烯吡啶溴化盐（ＱＰＶＰＤ）是根据文献方法合成〔７〕,其中ＱＰＶＰＤ－２０、ＱＰＶＰＤ－３０分别表示溴十二烷与４－乙烯吡啶投料的物质的量比为２０％和３０％．ＳＤＳ（北京化工厂,分析纯）,ＢＤＤＡＣ（北京化工厂,分析纯）使用前未做进一步提纯．１２待测溶液的配制向５×１０－５ｍｏｌ／Ｌ的表面活性剂溶液（ＳＤＳ、ＢＤＤＡＣ）中,在缓慢搅拌下加入质量浓度为２５ｇ／Ｌ的ＱＰＶＰＥ和ＱＰＶＰＤ溶液,最后加入蒸馏水定容．温度保持在３０℃,溶液静置２４ｈ后进行测定．１３实验方法相对粘度采用乌氏粘度计在（３０±１）℃水浴中测定．ＱＰＶＰＥ、ＱＰＶＰＤ与ＳＤＳ混合溶液的可见光透射率采用７２１分光光度计在室温下测定．以质量浓度为５ｇ／Ｌ的聚合物溶液为参比,波长为４２０ｎｍ,比色皿厚度为１ｍｍ．采用ＤＤＳ－１２Ａ数字式电导率仪（电极为ＤＪＳ－１光亮电极）．温度补偿为２５℃．２结果与讨论ＱＰＶＰＤ分子链上的长链疏水烷基在水溶液中可聚集成胶束,形成紧缩构象,这种聚集体又称为疏水微区（Ｈｙｄｒｏｐｈｏｂｉｃｍｉｃｒｏｄｏｍａｉｎ）．同聚电解质类似,聚皂     

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%.     

α-Amino acid derived enaminones and their application in the synthesis of N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates and other heterocycles

A new and simple synthesis of novel N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates, which exist in equilibrium with their 4-oxo tautomers, has been developed in two steps starting from N-protected α-amino acids. The key intermediates are enaminones, which can also be isolated, characterized, and used for the construction of other functionalized heterocycles, before they spontaneously decompose to pyrrole products. 4-Hydroxypyrroles are prone to partial aerial oxidation but can be efficiently alkylated or reduced to stable polysubstituted pyrrolidine derivatives.     

Specific intramolecular aromatic CH insertion of diazosulfonamides

The chemoselectivity in the intramolecular CH insertion of various diazosulfonamides has been experimentally studied. The results reveal that the aliphatic 1,4-, 1,5-, or 1,6-C(sp³)?H insertions of diazosulfonamides are not accessible, while the aromatic 1,5-C(sp²)?H insertion can be realized specifically by adjusting the diazo-adjacent group. In addition, the general chemoselectivities in the intramolecular CH insertions of diazosulfonyl compounds are summarized. Generally, diazosulfones undergo both aromatic 1,5-C(sp²)?H and aliphatic 1,5- and 1,6-C(sp³)?H insertions, while diazosulfonates undergo aliphatic 1,5- and 1,6-C(sp³)?H insertions. However, diazosulfonamides only undergo aromatic 1,5-C(sp²)?H insertion.     

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.     

N-Heterocyclic carbene-palladacyclic complexes: synthesis,characterization and their applications in the C-N coupling and α-arylation of ketones using aryl chlorides

N-Heterocyclic carbene-palladacyclic complexes 3 were successfully achieved in a one-pot procedure under mild conditions. The structure of 3a was unambiguously confirmed by X-ray single crystal diffraction and it was an active catalyst in the Buchwald-Hartwig amination and α-arylation of ketones even at very low catalyst loadings (0.01?mol%).     

Iodine-mediated oxidative Pictet-Spengler reaction using terminal alkyne as the 2-oxoaldehyde surrogate for the synthesis of 1-aroyl-β-carbolines and fused-nitrogen heterocycles

An efficient iodine-mediated oxidative Pictet-Spengler reaction in dimethyl sulphoxide (DMSO) using terminal alkynes as the 2-oxoaldehyde surrogate for the synthesis of aryl (9H-pyrido[3,4-b]indol-1-yl)methanones is described. The scope of the protocol includes the total synthesis of Fascaplysin, Eudistomins Y₁ and Y₂. The methodology is extended for preparing pyrrolo[1,2-a]-quinoxaline and indolo[1,5-a]quinoxaline derivatives. The utility of 1-aroyl-β-carbolines was demonstrated by performing palladium-catalyzed β-carboline directed ortho-C(sp2)-H functionalization of the phenyl ring with thiomethyl (SMe) group using DMSO as source and for accessing 4-aryl-canthin-6-ones.     

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.     

Facile synthesis of bicyclic 1-arylpyrazol-5-ones

In this Letter, we described a facile method for constructing fused bicyclic 1-arylpyrazol-5-one ring system. We employed various methylene-containing carboxylic acids as the substrates and proved that the pyrazolone ring closure requires activated methylene group in intermediate II. Accordingly, a series of structurally diversified, fused bicyclic 1-arylpyrazol-5-ones was prepared in moderate to high yields using the requisite substrates.     

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.     

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.