据报道,通过在2,2'-偶氮苯胺上连续两次杂环化,合成了1,1'-联苯并咪唑(2; R = Me)。通过适当的N-取代的苯并咪唑类化合物直接形成N-N键而形成(2)的替代方法是不成功的。二聚体(2)表现出极强的热和光化学稳定性,对氢的提取和向烯烃的添加均具有稳定性。尽管N–N键很容易在乙醇中被辐射裂解,但从(2)中检测中性自由基苯并咪唑-1-基(1; R = Me)的所有尝试均未成功。但是,以1-碘代苯并咪唑为前体观察到了由(1)提取的氢。
Synthesis, structure and biological activity of silver(I) complexes of substituted imidazoles
摘要:
[Ag-2(9-aca)(2)] (9-acaH = 9-anthracenecarboxylic acid) interacts with DMSO and a selection of substituted imidazoles giving [Ag-4(DMSO)(4)(9-aca)(4)] (1), [Ag(2-Me-imH)(2)(9-aca)] (2), [Ag(4-Ph-imH)(2)(9-aca)] (3), [Ag(2-Mebenz-imH)2(()9-aca)] (4), [Ag(2-Mebenz-im)] (6), [Ag(Benz-im)] (7), [Ag(2-Ph-im)] (8) and [Ag(4,5-CN-im)] (9) (2-Me-imH = 2-methylimidazole; 4-Ph-imH = 4-phenylimidazole; 2-Mebenz-imH = 2-methylbenzimidazole; Benz-imH = benzimidazole; 2-Ph-imH = 2-phenylbenzimidazole; 4,5-CN-imH = 4,5-dicyanoimidazole). In the carboxylate/imidazole complexes 2-4, the imidazole ligand is in the neutral form, whilst in complexes 6-9 the imidazolate ligand is deprotonated and no carboxylate ligand is present. Attempted recrystallization of 4 from EtOH gives the metal-free, imidazolium salt, 2-Mebenz-imH(2))(9-aca)center dot H2O (5). The X-ray crystal structures of complexes 1 and 2 and the salt 5 were determined. Antimicrobial screening showed that the Ag(l) complexes were substantially more active against the fungus Candida albicans than the bacterial species, methicillin-resistant Staphylococcus aureus (MRSA) and Escherichia coli. Some of the complexes offer a good prognosis for Galleria mellonella (larvae of the greater wax moth) infected with a lethal dose of C. albicans cells. (C) 2013 Elsevier Ltd. All rights reserved.
据报道,通过在2,2'-偶氮苯胺上连续两次杂环化,合成了1,1'-联苯并咪唑(2; R = Me)。通过适当的N-取代的苯并咪唑类化合物直接形成N-N键而形成(2)的替代方法是不成功的。二聚体(2)表现出极强的热和光化学稳定性,对氢的提取和向烯烃的添加均具有稳定性。尽管N–N键很容易在乙醇中被辐射裂解,但从(2)中检测中性自由基苯并咪唑-1-基(1; R = Me)的所有尝试均未成功。但是,以1-碘代苯并咪唑为前体观察到了由(1)提取的氢。
Ligand effects on the structural dimensionality and antibacterial activities of silver-based coordination polymers
作者:Xinyi Lu、Junwei Ye、Yuan Sun、Raji Feyisa Bogale、Limei Zhao、Peng Tian、Guiling Ning
DOI:10.1039/c4dt00270a
日期:——
Four Ag-based coordination polymers [Ag(Bim)] (1), [Ag2(NIPH)(HBim)] (2), [Ag6(4-NPTA)(Bim)4] (3) and [Ag2(3-NPTA)(bipy)0.5(H2O)] (4) (HBim = 1H-benzimidazole, bipy = 4,4′-bipyridyl, H2NIPH = 5-nitroisophthalic acid, H2NPTA = 3-/4-nitrophthalic acid) have been synthesized by hydrothermal reaction of Ag(I) salts with N-/O-donor ligands. Single-crystal X-ray diffraction indicated that these coordination polymers constructed from mononuclear or polynuclear silver building blocks exhibit three typical structure features from 1-D to 3-D frameworks. These compounds favour a slow release of Ag+ ions leading to excellent and long-term antimicrobial activities, which is distinguished by their different topological structures, towards both Gram-negative bacteria, Escherichia coli (E. coli) and Gram-positive bacteria, Staphylococcus aureus (S. aureus). In addition, these compounds show good thermal stability and light stability under UV-vis and visible light, which are important characteristics for their further application in antibacterial agents.
Prolonging the lifetimes of plasmonic hot electrons for efficient hydrogen evolution by Ag@N,O-C interfaces with a unique ginkgo-leaf hierarchical structure
作者:Yun Yang、Guilin Zhuang、Liming Sun、Xibo Zhang、Xiaoqin Yan、Wenwen Zhan、Xiaojun Wang、Xiguang Han
DOI:10.1039/d0ta06308h
日期:——
N,O-doped C layers fully-coated Ag nanoparticles have assembled to form into a three-level hierarchical structure, which have shown highly-improved photocatalytic activity toward hydrogen production reaction from water.
Borate compound, and photopolymerizable composition and recording material which contain the same
申请人:FUJI PHOTO FILM CO., LTD.
公开号:EP1035124A1
公开(公告)日:2000-09-13
The present invention provides a novel borate compound and a recording material comprising thereof in a photopolymerizable composition in a recording layer. The novel borate compound is represented by the following general formula (I):
General formula (I)
wherein R1 represents an alkyl group which may have a substituent; R2, R3 and R4 each represents an aryl group represented by the following general formula (II); and Z+ represents a group capable of forming a cation,
General formula (II)
wherein R5 represents an electron donative group; and R6 to R9 each represents a substituent, the total Hammett substituent σ constant of R5 to R9 being from 0 to 1.
Photopolymerizable composition, recording material and image forming method
申请人:FUJI PHOTO FILM CO., LTD.
公开号:US20030077542A1
公开(公告)日:2003-04-24
A photopolymerizable composition and a recording material containing the composition. The composition include at least a radical-polymerizable compound and a photopolymerization initiator, in which the photopolymerization initiator contains a borate compound, having a melting point of not more than 140° C., of the following general formula (I) in which R
1
, R
2
, R
3
and R
4
each independently represent an alkyl group, aryl group, heterocyclic group, or silyl group; and Z
+
represents a cation.
1
一种可光聚合的组合物和含有该组合物的记录材料。该组合物至少包括一种可自由基聚合的化合物和一种光聚合引发剂,其中光聚合引发剂包含一种硼酸盐化合物,熔点不超过 140 摄氏度,其通式如下(I),其中 R
1
, R
2
, R
3
和 R
4
各自独立地代表烷基、芳基、杂环基或硅烷基;以及 Z
代表阳离子;
代表阳离子。
1