Aggregation-enhanced emission in fluorophores containing pyridine and triphenylamine terminals: restricted molecular rotation and hydrogen-bond interaction
Silver‐Catalyzed Coupling of Two CH Groups and One‐Pot Synthesis of Tetrasubstituted Furans, Thiophenes, and Pyrroles
作者:Shuai Mao、Xue‐Qing Zhu、Ya‐Ru Gao、Dong‐Dong Guo、Yong‐Qiang Wang
DOI:10.1002/chem.201501410
日期:2015.8.3
Silver‐catalyzedcoupling of twoCHgroups to form 1,4‐diketones have been developed for the first time. The resultant ketones then undergo cyclization to synthesize tetrasubstitutedfurans, thiophenes, and pyrroles from benzyl ketone derivatives in a one‐pot reaction process. This highly‐efficient synthetic method, which utilizes air as the terminal oxidant and readily accessible starting materials
The influences of the structure of thiophene-based conjugated microporous polymers on the fluorescence sensing properties
作者:Tong-Mou Geng、Chen Hu、Min Liu、Can Zhang、Heng Xu、Xie Wang
DOI:10.1039/d0nj02912b
日期:——
Three thiophene-based conjugated microporous polymers (CMPs: TTPTh, DBTh, and TBTh) were prepared by Sonogashira–Hagihara cross-coupling polymerization, and their structures were characterized by FTIR, ss 13C NMR, and elemental analyses. The obtained TTPTh, DBTh, and TBTh have excellent thermal stability with decomposition temperatures of 615, 298, and 290 °C and high porosity with BET surface areas
Sonogashira-Hagihara交叉偶联聚合制备了三种基于噻吩的共轭微孔聚合物(CMP:TTPTh,DBTh和TBTh),并通过FTIR,ss 13 C NMR和元素分析对它们的结构进行了表征。所得的TTPTh,DBTh和TBTh具有优异的热稳定性,分解温度为615、298和290°C,并且具有高孔隙率,BET表面积为564.97、416.99和521.30 m 2 g -1, 分别。结果表明,CMP的共轭在确定荧光传感性能中起着至关重要的作用。因为从建筑物块或低度的低体积所产生的完美结合的交联,DBTH具有高荧光的感测灵敏度2,4-二硝基苯酚(DNP)和碘,ķ SV的5.76×10的值4和4.52 ×10 4 L mol -1和LOD分别为1.56×10 -10和3.32×10 -12 mol L -1。据我们所知,DBTh对DNP和碘的敏感性是迄今为止报道的所有基于噻吩的CMP
Method for manufacturing polyamide resin
申请人:Tosoh Corporation
公开号:EP0347878A2
公开(公告)日:1989-12-27
A polyamide resin having double bonds in its main chain is prepared by reacting a bis-alkenoic amide with an aromatic dihalide. These starting materials are stable, easy to handle and inexpensive.
A process for manufacturing an aromatic polyester resin represented by the general formula:
[-O-Ar¹-O--Ar²--]n
wherein Ar¹ and Ar² represent a bivalent aromatic residue and n is an integer of 10 to 100,
comprising a reaction of an aromatic diol represented by the general formula:
HO-Ar¹-OH
with a bivalent dibromide represented by the general formula:
Br-Ar²-Br
and carbon monoxide in the presence of a palladium catalyst and an organic base in an organic solvent.
A method for preparing a polymer including the step of reacting carbon monoxide and a reactant pair having respective general formulas
or a reactant pair having respective general formulas
or a reactant having the general formula
X is a nonortho halide selected from the group consisting of Br and I. n is an integer from 0 to 4, d is an integer from 0 to 1 and e is an integer from 0 to 3. If d is 0, then e is 0. R1 is selected from the group consisting of alkyl, arylalkyl, aryl, heteroaryl, and cycloalkyl. R2 is selected from the group consisting of
wherein each R5 is independently selected from the group consisting of alkyl and aryl, m is an integer from 1-12, and j is an integer between 0 and 300. R3 is selected from the group consisting of substituted aryl, unsubstituted aryl, substituted heteroaryl, and unsubstituted heteroaryl. R4 is selected from the group consisting of