16004-75-4Relevant articles and documents
Novel sulfonate-containing halogen-free flame-retardants: Effect of ternary and quaternary sulfonates centered on adamantane on the properties of polycarbonate composites
Zhu, Dong Yu,Guo, Jian Wei,Xian, Jia Xing,Fu, Shu Qin
, p. 39270 - 39278 (2017)
In order to find a more environmentally friendly flame retardant, we have designed a novel halogen-free flame-retardant (FR) system consisting of ternary and quaternary sulfonates centered on adamantane. They are named 1,3,5-tri(phenyl-4-sodium sulfonate)adamantane (AS3) and 1,3,5,7-tetrakis(phenyl-4-sodium sulfonate)adamantane (AS4), respectively. Both kinds of FRs were synthesized and compounded with polycarbonate (PC) to study their effects on the properties of PC composites. The results show that the new FR system can improve PC flame retardancy efficiently, and has mechanical strength advantages as well. The PC composites with only 0.1 wt% AS3 or 0.08 wt% AS4 can pass vertical burning tests (UL-94) V-0 level, with increasing the value of limiting oxygen index (LOI) to 31.2% or 32.3%. Moreover, they can maintain ideal mechanical properties compared to neat PC simultaneously. Finally, the flame retardant mechanism of this system was verified via thermal analysis, morphology and chemical structure analysis of the char residues.
Stetter,Krause
, p. 1841 (1967)
Design of solvatomorphic structures based on a polyboronated tetraphenyladamantane molecular tecton
Drapa?a, Jakub,Durka, Krzysztof,Gontarczyk, Krzysztof,Klimkowski, Piotr,Luliński, Sergiusz,Marek-Urban, Paulina H.,Urbanowicz, Karolina A.,Wo?niak, Krzysztof
, p. 8169 - 8182 (2021/12/08)
A series of solvatomorphic structures of tetrakis(4-dihydroxyborylphenyl)adamantane, 1, have been prepared and analyzed by single crystal X-ray diffraction methods. Tetraboronated adamantane represents a valuable scaffold for the formation of various supramolecular structures in the solid state. Through three-component crystallizations of 1 in methanol in the presence of a secondary ingredient (acetone, DMSO, DMF, 1,4-dioxane, urea), seven crystal structures were obtained. In turn, crystallization from a methanol-acetonitrile mixture produced large transparent needles, but the material proved amorphous and solely composed of 1 underlying the pivotal role of solvent molecules in the stabilization of the crystal structure. Six out of the seven obtained structures crystallize in tetragonal space groups of symmetry in accordance with the general molecular symmetry of 1. The most common crystal motif constitutes H-bonded tetramers, where interactions between boronic groups are mediated by solvent molecules. Alternatively, linear discrete H-bonded motifs composed of four molecules of 1 and four molecules of DMF were also observed. According to expectation, the inclusion of 1,4-dioxane favors the formation of 1D linear chains, although the overall H-bonding pattern is quite complex due to the presence of water molecules. Surprisingly, the crystallization of 1 in wet methanol solution resulted in the formation of hemi-ester species containing four B(OMe)(OH) groups and incorporating a water molecule. The same process was observed when crystallization was performed in a methanol-urea mixture. The role of the solvent molecules is additionally discussed in the context of performed DFT calculations. The thermogravimetric analysis shows that solvent evaporation is accompanied by the dehydration of boronic groups presumably leading to the formation of a covalently bonded polymeric material, whose stability is predefined by the initial structure of 1. This journal is
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.
