Study on the Reaction of Benzimidazolium Salt with Amine Compounds

The addition-hydrolysis reaction of benzimidazolium salt with some mono- and bifunctional amine nucleophiles is reported,and a novel method of biomimetic synthesis for formamides and heterocycle compounds is provided.     

Synthesis, structure and magnetic properties of two new coordination polymers with carboxylate-substituted benzoimidazole ligands

This paper reports two new coordination polymers formed by carboxylate-substituted benzoimidazole and formate ligands: [Mn(L)·(HCO2)]n (1) and [Co(L)·(HCO2)]n (2) (L = benzoimidazol-1-yl-acetate). Com-plexes 1 and 2 are isomorphous and adopt a new 3,6-connected three-nodal topology showing inter-esting magnetic properties: spin canted antiferromagnetism for MnⅡ complex 1, but simple antiferro-magnetic coupling for CoⅡ complex 2.     

Syntheses,Characterization, and Electrochemical Lithium‐Ion Storage Properties of Two Cobalt(II) Coordination Polymers Containing 5‐Hydroxyisophthalic Acid and Bis‐benzoimidazole Ligands

Two cobalt(II) coordination polymers, namely {[Co(HO‐BDC)(bbe)] · (H₂O)}_n ( 1 ), and {[Co(O‐BDC)(bbp)] · (H₂O)}_n ( 2 ) (HO‐H₂BDC = 5‐hydroxyisophthalic acid, bbe = 1, 2‐bis(benzoimidazol‐2‐yl)ethane, and bbp = 1, 3‐bis(benzoimidazol‐2‐yl)propane) were synthesized under hydrothermal conditions, and characterized by elemental analyses, IR spectroscopy, single‐crystal X‐ray diffraction, and thermogravimetric analyses. Compound 1 is a 1D chain, whereas 2 is a (3, 3)‐connected 2D network with (6³) topology. These two 1D and 2D complexes are further connected by hydrogen bonds to form the 3D supramolecular architectures. The electrochemical lithium‐ion storage properties of the as‐made Co₃O₄ by calcination of 1 are investigated in detail.     

Allylic alkylation of benzoimidazole catalyzed by palladium complexes

Bis(dibenzylidenacetone)palladium is an efficient and highly selective catalyst for the formation ofN-(2,7-dimethylocta-2,7-dienyl)benzoimidazole in the allylation of benzoimidazole withN-(2,7-dimethylocta-2,7-dienyl)-N-methylpiperidinium iodide in the presence of NaH. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 357–360, February, 1999.     

Ring contraction in reactions of 3-benzoylquinoxalin-2-ones with 1,2-phenylenediamines. Quinoxaline-benzoimidazole rearrangement

The reactions of 3-benzoylquinoxalin-2-one and its N(1)-alkyl derivatives with 1,2-phenylenediamines were accompanied by ring contraction as a result of the quinoxaline-benzoimidazole rearrangement giving rise to 2-benzoimidazolyl-substituted quinoxalines. The possible pathways of these reaction are discussed.     

2-[5'-CH3(H)-苯并咪唑-2'-亚甲硫基]-5-取代-1,3,4-(口恶)二唑的合成及生长素活性

以邻苯二胺(或4-甲基邻苯二胺)及一氯乙酸为原料,在酸性条件下,合成2-氯甲基苯并咪唑及2-氯甲基-5-甲基苯并咪唑;以取代羧酸为原料经酯化、肼解、再与CS2在氢氧化钾溶液中反应,合成10种2-巯基-5-取代-1,3,4-(口恶)二唑;将2种2-氯甲基-5-取代-苯并咪唑与10种2-巯基-5-取代-1,3,4-(口恶)二唑在氢氧化钠溶液中反应,合成14种2-[5’-CH3(H)-苯并咪唑-2’-亚甲硫基]-5-取代-1,3,4-(口恶)二唑衍生物.借助红外光谱、核磁共振氢谱和元素分析对化合物结构进行表征.初步生长素活性测试结果表明,所合成的化合物对小麦芽鞘和绿豆发芽有着不同程度的生长调节作用.     

壳聚糖-g-N-羧甲基-二（2-苯并咪唑）-1,2-乙二醇和纳米金溶胶复合物固定漆酶修饰玻碳电极的直接电化学

制备了壳聚糖-g-N-羧甲基-二（2-苯并咪唑）-1,2-乙二醇（CTS-g-N-CBBIE）,将其与纯化的纳米金溶胶（NGS）共混得到CTS-g-N-CBBIE-NGS复合物。 以此复合物作为固酶载体固定云芝漆酶,固酶量大（31.10 mg/g）,固酶比活力高（1.43 U/mg）;此固酶复合物修饰的玻碳电极在无氧磷酸盐-柠檬酸盐缓冲溶液（pH=5.0）中可以实现无中介酶-电极直接电子迁移（一对准可逆氧化还原峰式电位576 mV(vs.Ag/AgCl)对应于漆酶活性中心T1位的氧化还原）,电子迁移速率常数为228.3 s-1。 当氧气浓度较小时,这种固酶修饰电极对氧气还原具有一定的生物电催化性能（空气饱和缓冲溶液中氧还原峰电位约为320 mV(vs.Ag/AgCl)）。 当氧气浓度增高后,氧还原反应受到抑制;但这种漆酶修饰电极对pH较为敏感,且稳定性和重复使用性欠佳。     

一种苯并咪唑类双极性蓝色磷光主体材料的合成及性能

设计合成了一种基于苯并咪唑的新型双极性蓝色磷光主体材料1-苯基-2-[4-(N-咔唑基)苯基]苯并咪唑(PCPB),并对其结构进行了表征。通过紫外-可见、荧光、低温磷光光谱以及循环伏安法、热重分析、差热分析和密度泛函理论对其性能及结构进行了研究。结果表明,PCPB在CH2Cl2稀溶液中的吸收峰位于296和368 nm,发射峰位于401nm,属于深蓝色荧光;PCPB的低温(77K)磷光光谱的第一吸收峰位于452nm,其三线态能级为2.74e V,与蓝色磷光材料FIrpic(2.62e V)的能级相匹配;PCPB的HOMO主要分布在苯基咔唑单元,而LUMO主要定域在苯并咪唑环上。其HOMO能级为-5.54e V,与阳极ITO的功函(-4.5~-5.0 e V)相匹配,LUMO能级为-2.68e V,接近于电子传输材料PBD(-2.82e V)。PCPB表现出双极传导性能,且热稳定性良好。     

2-[5'-CH3(H)-苯并咪唑-2'-亚甲硫基]-5-取代-1,3,4-噁二唑的合成及生长素活性

以邻苯二胺(或4-甲基邻苯二胺)及一氯乙酸为原料,在酸性条件下,合成2-氯甲基苯并咪唑及2-氯甲基-5-甲基苯并咪唑;以取代羧酸为原料经酯化、肼解、再与CS2在氢氧化钾溶液中反应,合成10种2-巯基-5-取代-1,3,4-噁二唑;将2种2-氯甲基-5-取代-苯并咪唑与10种2-巯基-5-取代-1,3,4-噁二唑在氢氧化钠溶液中反应,合成14种2-[5’-CH3(H)-苯并咪唑-2’-亚甲硫基]-5-取代-1,3,4-噁二唑衍生物。借助红外光谱、核磁共振氢谱和元素分析对化合物结构进行表征。初步生长素活性测试结果表明,所合成的化合物对小麦芽鞘和绿豆发芽有着不同程度的生长调节作用。     

2-(2′-羟基苯基)苯并咪唑的质子转移反应和光谱性质的理论研究

用AM1和INDO/S-CI方法对2-(2’-羟基苯基)苯并咪唑的基态和激发态分子内质子转移反应进行了理论研究,求得基态和激发态反应的势能曲线、势垒和过渡态,并研究了此分子的一些异构体、阴离子的相对稳定性,估算了氢键能.进行了实验光谱的理论指认,所得结果与实验值符合较好,在此基础上对光化学反应机理和光谱性质进行了探讨.