15499-84-0Relevant articles and documents
A soluble porous organic polymer for highly efficient organic-aqueous biphasic catalysis and convenient reuse of catalysts
Fu, Hao-Xi,Zhang, Zhi-Hao,Fan, Wenhao,Wang, Shuifeng,Liu, Yan,Huang, Mu-Hua
, p. 15048 - 15053 (2019)
Functional porous organic polymers (POPs) such as PIM-1 with good solubility have been used for the homogenization of heterogeneous catalysts very recently, in addition to the traditional gas/liquid adsorption and separation. As emerging functional POPs, Azo-POPs have been studied broadly, although they are usually insoluble. This paper reports a novel soluble Azo-POP (named Azo-POP-7) with a fluorene-derived β-hydroxy-azobenzene subunit in the polymer main chain for the first time via a facile azo-coupling polymerization of contorted monomers. The resultant polymers exhibited a Brunauer-Emmett-Teller (BET) specific surface area of 364 m2 g-1 and good solubility in most organic solvents. Moreover, the soluble catalyst Pd@Azo-POP-7 showed the highest efficiency (kapp = 4.95 × 10-2 s-1) for the organic-aqueous biphasic reduction reaction of 4-nitrophenol with good recyclability (12 cycles). This work introduces a novel strategy for designing novel functional POPs for organic/aqueous biphasic catalysis.
Synthesis method of 9,9-bis(4-aminophenyl)fluorene derivative
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Paragraph 0024-0047, (2020/09/30)
The invention relates to a synthesis method of a 9,9-bis(4-aminophenyl)fluorene derivative. The synthesis method comprises the following steps: sequentially adding 9-fluorenone, aniline, a catalyst and a solvent into a three-neck flask provided with a stirrer, a thermometer and a water segregator; introducing N2 is into the three-neck flask for protection, starting the stirrer, performing heatingreflux; after the reaction is finished, cooling, filtering, washing a filter cake with a small amount of solvent to obtain a catalyst, distilling filtrate under reduced pressure to sequentially distill out the solvent and a small amount of unreacted aniline; wherein the residue obtained after distillation is a crude product, and re-crystallizing to obtain a pure product, namely the required 9,9-bis(4-aminophenyl)fluorene product. The method has the advantages that the green solid acid montmorillonite K10 is used as a catalyst and can be reused for 2-3 times, three wastes generated by neutralization are reduced, the use amount of aniline is also reduced, aniline can be recycled, the reaction conditions are mild, the operation is simple and convenient, and the method is an economical and feasible clean production process and can be easily applied to large-scale production.
Application of supported heteropoly acid catalyst in preparation of 9,9-bi(4-amido aryl) fluorene type compound
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Paragraph 0034-0040; 0058-0060, (2018/12/13)
The invention provides application of a supported heteropoly acid catalyst in preparation of a 9,9-bi(4-amido aryl) fluorene type compound. The supported heteropoly acid catalyst is prepared from heteropoly acid and a solid carrier, wherein the solid heteropoly acid is one or two kinds of materials from heteropoly acid such as phosphotungstic acid, phosphomolybdic acid, silicotungstic acid, silicomolybdic acid, germanotungtic acid or germanium molybdic acid; the carrier is one of materials from white clay, bentonite, kieselguhr, natural clay, silicon dioxide, aluminum oxide, molecular sieves,kaolin or active carbon. The application has the beneficial effects that the operation is simple and convenient; the reaction time is short; the yield is high; the catalyst can be repeatedly used formany times; the catalytic efficiency is improved; the production cost is also reduced; the environment pollution and the equipment corrosion are reduced; the application is applicable to industrial sustainable production.