945018-87-1Relevant articles and documents
Rigid Multidimensional Alkoxyamines: A Versatile Building Block Library
Matt, Yannick,Wessely, Isabelle,Gramespacher, Lisa,Tsotsalas, Manuel,Br?se, Stefan
supporting information, p. 239 - 245 (2020/12/17)
Since the discovery of the “living” free-radical polymerization, alkoxyamines were widely used in nitroxide-mediated polymerization (NMP). Most of the known alkoxyamines bear just one functionality with only a few exceptions bearing two or more alkoxyamine units. Herein, we present a library of novel multidimensional alkoxyamines based on commercially available, rigid, aromatic core structures. A versatile approach allows the introduction of different sidechains which have an impact on the steric hindrance and dissociation behavior of the alkoxyamines. The reaction to the alkoxyamines was optimized by implementing a mild and reliable procedure to give all target compounds in high yields. Utilization of biphenyl, p-terphenyl, 1,3,5-triphenylbenzene, tetraphenylethylene, and tetraphenyl-methane results in linear, trigonal, square planar, and tetrahedral shaped alkoxyamines. These building blocks are useful initiators for multifold NMP leading to star-shaped polymers or as a linker for the nitroxide exchange reaction (NER), to obtain dynamic frameworks with a tunable crosslinking degree and self-healing abilities.
Preparation of Recyclable and Versatile Porous Poly(aryl thioether)s by Reversible Pd-Catalyzed C–S/C–S Metathesis
Morandi, Bill,Rivero-Crespo, Miguel A.,Toupalas, Georgios
supporting information, p. 21331 - 21339 (2021/12/17)
Porous organic materials (polymers and COFs) have shown a number of promising properties; however, the lability of their linkages often limits their robustness and can hamper downstream industrial application. Inspired by the outstanding chemical, mechanical, and thermal resistance of the 1D polymer poly(phenylene sulfide) (PPS), we have designed a new family of porous poly(aryl thioether)s, synthesized via a mild Pd-catalyzed C–S/C–S metathesis-based method, that merges the attractive features common to porous polymers and PPS in a single material. In addition, the method is highly modular, allowing to easily introduce application-oriented functionalities in the materials for a series of environmentally relevant applications including metal capture, metal sensing, and heterogeneous catalysis. Moreover, despite their extreme chemical resistance, the polymers can be easily recycled to recover the original monomers, offering an attractive perspective for their sustainable use. In a broader context, these results clearly demonstrate the untapped potential of emerging single-bond metathesis reactions in the preparation of new, recyclable materials.
Gold nanoparticles confined in imidazolium-based porous organic polymers to assemble a microfluidic reactor: Controllable growth and enhanced catalytic activity
Fang, Haobin,Sun, Shujian,Liao, Peisen,Hu, Ya,Zhang, Jianyong
, p. 2115 - 2121 (2018/02/09)
A synthetic strategy is developed to grow Au nanoparticles supported by imidazolium-based porous organic polymers (Au/IM-POPs) along the inner surface of a fused-silica microfluidic capillary. The thickness of the hybrid Au/IM-POP material layers can be tuned by changing the precursor concentration. A variety of imidazolium-based porous organic polymers are developed from tetrakis[4-(1-imidazolyl)phenyl]methane and bromo-functionalized linker molecules and fully characterized, which may be used to support Au nanoparticles. Additionally the IM-POPs and Au/IM-POPs show porosity and the ability to take up guest molecules. The capillary coated with Au/IM-POPs is further assembled to obtain a catalytic microfluidic reactor. The catalytic activity of Au nanoparticles supported by the porous imidazolium polymer is probed by using the reduction of nitrobenzene derivatives flowing through the microfluidic reactor. The catalytic microfluidic reactor demonstrates significantly enhanced turnover frequency magnitudes in comparison with the corresponding reactions under batch conditions.
Azo-linked porous organic polymers: Robust and time-efficient synthesis: Via NaBH4-mediated reductive homocoupling on polynitro monomers and adsorption capacity towards aniline in water
Zhou, Jin-Xiu,Luo, Xian-Sheng,Liu, Xiangxiang,Qiao, Yan,Wang, Pengfei,Mecerreyes, David,Bogliotti, Nicolas,Chen, Shi-Lu,Huang, Mu-Hua
supporting information, p. 5608 - 5612 (2018/04/12)
Time-efficient synthetic methods of porous organic polymers are searched in order to extend the applications of these materials. In this work, we show a robust and time-efficient synthetic method of azo-linked porous organic polymers named Azo-POPs based on a NaBH4-mediated reductive coupling polymerization on well-known polynitro monomers. Azo-POPs were found to have a high Brunauer-Emmett-Teller (BET) surface area and potential for aniline adsorption. Interestingly, Azo-POP-1 showed adsorption capacity towards aniline as high as 1059.68 mg g-1 at 293 K, which surpassed that of adsorbent materials reported in the literature.
Chiral porous organic frameworks for asymmetric heterogeneous catalysis and gas chromatographic separation
Dong, Jinqiao,Liu, Yan,Cui, Yong
supporting information, p. 14949 - 14952 (2015/01/08)
Three chiral robust diene-based porous organic frameworks (POFs) are prepared. POF-1 is shown to be an efficient heterogeneous catalyst after metallation for asymmetric conjugation addition with up to 93% ee, and it can also function as a new chiral stationary phase for gas chromatographic separation of racemates. This journal is
First pre-functionalised polymeric aromatic framework from mononitrotetrakis(iodophenyl)methane and its applications
Verde-Sesto, Ester,Pintado-Sierra, Mercedes,Corma, Avelino,Maya, Eva M.,De La Campa, Jose G.,Iglesias, Marta,Sanchez, Felix
supporting information, p. 5111 - 5120 (2014/05/06)
Starting from mononitrotetrakis(iodophenyl)methane as monomer, we report the preparation of the first pre-functionalised porous aromatic frameworks (PAFs) and their application as supports for organometallic catalysts. Neutral coordinate imino-pyridine Schiff base (PAF-NPy) or chiral bis-amino (PAF-NPro) ligands were obtained by post-synthetic treatment of PAF-NH2 and treated with copper(I) or rhodium(I) to yield the corresponding supported transition-metal catalysts. The as-prepared PAF-NN-M catalysts exhibited activity and selectivity similar to that of the corresponding homogeneous catalysts and were easily removed from reaction media and recycled without loss of activity or selectivity. New copper catalysts: The preparation of pre-functionalised porous aromatic frameworks (PAFs) and their application as supports for organometallic catalysts (see figure) is reported for the first time.
Facile synthesis of azo-linked porous organic frameworks via reductive homocoupling for selective CO2 capture
Lu, Jingzhi,Zhang, Jian
supporting information, p. 13831 - 13834 (2014/08/18)
A facile Zn-induced reductive homocoupling reaction was used to synthesize azo-linked porous organic frameworks (azo-POFs) from easily accessed nitro monomers. Azo-POF-2 exhibits the highest CO2/N2 selectivity of 76 at 273 K among all self-coupled azo-linked porous polymers. This journal is the Partner Organisations 2014.
Photocurable compound
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Page/Page column 19-20, (2012/07/27)
Disclosed is a compound having a photocurable urethane (meth)acrylate group, its manufacturing method, and a photocurable composition including the compound. The compound is represented by Chemical Formulae 1 to 6. Each of Chemical Formulae 1 to 6 includes a urethane (meth)acrylate group represented by Chemical Formula 1-1 or 1-2.
Preparation of functionalised tetraphenylmethane derivatives via the Suzuki-Miyaura cross-coupling reaction
Kotha, Sambasivarao,Behera, Manoranjan
, p. 2684 - 2689 (2007/10/03)
A general methodology for the synthesis of various symmetrical and unsymmetrical tetraphenylmethane (TPM) derivatives is reported using the Suzuki-Miyaura (SM) cross-coupling reaction as a key step. The formation of an interesting self-coupling product 14 during the SM cross-coupling reaction of mono-iodo tetraphenylmethane derivative 5 is also observed.
Tetrahedral n-type materials: Efficient quenching of the excitation of p-type polymers in amorphous films
Ganesan, Palaniswamy,Yang, Xiaoniu,Loos, Joachim,Savenije, Tom J.,Abellon, Ruben D.,Zuilhof, Han,Sudhoelter, Ernst J. R.
, p. 14530 - 14531 (2007/10/03)
Tetrahedral naphthalenediimide compound 1 has been synthesized as an example of a new class of amorphous n-type materials, in which the nondirectionality obtained by its shape is decoupled from its optoelectronic properties. 1 forms bicontinuous films with p-type polymers and effectively quenches the excited state, yielding long-lived mobile charge carriers on pulsed illumination. Copyright
