16004-75-4Relevant academic research and scientific papers
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.
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
Regioselective Synthesis of meta-Tetraaryl-Substituted Adamantane Derivatives and Evaluation of Their White Light Emission
Becker, Jonathan,Bernhardt, Bastian,Gowrisankar, Saravanan,Schreiner, Peter R.
supporting information, p. 6806 - 6810 (2021/12/31)
New meta-substituted tetraaryl adamantane derivatives were synthesized through one-step Friedel-Crafts adamantylation by using AlCl3 in combination with t-butyl bromide. The products exhibit improved (over tetraphenyl adamantane) highly directional white-light emission upon irradiation with a continuous wave (CW) laser diode.
Chromophore Multiplication To Enable Exciton Delocalization and Triplet Diffusion Following Singlet Fission in Tetrameric Pentacene
Hetzer, Constantin,Basel, Bettina S.,Kopp, Sebastian M.,Hampel, Frank,White, Fraser J.,Clark, Timothy,Guldi, Dirk M.,Tykwinski, Rik R.
supporting information, p. 15263 - 15267 (2019/10/22)
A tetrameric pentacene, PT, has been used to explore the effects of exciton delocalization on singlet fission (SF). For the first time, triplet decorrelation through intramolecular triplet diffusion was observed following SF. Transient absorption spectros
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.
COMPOUNDS AND METHODS FOR MODULATING RNA FUNCTION
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Paragraph 0059, (2018/02/28)
The present invention provides compounds, compositions thereof, and methods of using the same.
Preparation of a hyperbranched porous polymer and its sensing performance for nitroaromatics
Wu, Hongtao,Xu, He,Tao, Furong,Su, Xi,Yu, William W.,Li, Tianduo,Cui, Yuezhi
, p. 12802 - 12810 (2018/08/04)
A hyperbranched porous polymer P based on adamantane and pyrene was synthesized through the Sonogashira coupling reaction. The three-dimensional rigid molecular skeleton of adamantane makes polymer P porous. Compound M, which acts as the block moiety between two adamantane groups in polymer P, was also synthesized for the control experiment. Compared with M, the characteristics of P changed remarkably with it exhibiting different emission behaviors and performances for the detection of DNT. In saturated DNT vapor, the quenching efficiency (ηEP) of film P (82%) was remarkably superior compared with that of film M (22%). In addition, a series of films with different thicknesses and different amounts of polymer P were prepared. Results showed that the quenching efficiencies did not change with an increase in the film thickness.
Nanoporous amide networks based on tetraphenyladamantane for selective CO2 capture
Zulfiqar, Sonia,Mantione, Daniele,El Tall, Omar,Sarwar, Muhammad Ilyas,Ruipérez, Fernando,Rothenberger, Alexander,Mecerreyes, David
supporting information, p. 8190 - 8197 (2016/06/13)
Reduction of anthropogenic CO2 emissions and CO2 separation from post-combustion flue gases are among the imperative issues in the spotlight at present. Hence, it is highly desirable to develop efficient adsorbents for mitigating climate change with possible energy savings. Here, we report the design of a facile one pot catalyst-free synthetic protocol for the generation of three different nitrogen rich nanoporous amide networks (NANs) based on tetraphenyladamantane. Besides the porous architecture, CO2 capturing potential and high thermal stability, these NANs possess notable CO2/N2 selectivity with reasonable retention while increasing the temperature from 273 K to 298 K. The quantum chemical calculations also suggest that CO2 interacts mainly in the region of polar amide groups (-CONH-) present in NANs and this interaction is much stronger than that with N2 thus leading to better selectivity and affirming them as promising contenders for efficient gas separation.
Tetrahedral rigid core antenna chromophores bearing bay-substituted perylenediimides
Myahkostupov, Mykhaylo,Castellano, Felix N.
, p. 9519 - 9527 (2015/12/01)
Two new representative methane- and adamantane-centered 'antenna' tetramers bearing bay-substituted π-conjugated phenylethynyl-perylenediimides (PDICCPh) as chromophoric subunits, tetrakis-[1-(4-ethynylphenyl)-N,N′-bis(1-hexylheptyl)-perylene-3,4:9,10-tetracarboxylic diimide]-methane (1) and tetrakis-1,3,5,7-[1-(4-ethynylphenyl)-N,N′-bis(1-hexylheptyl)-perylene-3,4:9,10-tetracarboxylic diimide]-adamantane (2), have been synthesized and their structural aspects have been thoroughly investigated by NMR spectroscopy. These PDI tetramers (1 and 2) represent the first successful example of incorporating the bay-substituted phenylethynyl-perylenediimides into the large rigid core tetrahedral frameworks. In these PDI tetramers, dynamic NMR experiments revealed the existence of perylene-centered conformational dynamic equilibrium (ΔG≠=15-17 kcal/mol), the primary cause of the observed spectral broadening in conventional 1H NMR spectra (295 K). In addition, PDI tetramers 1 and 2 were found to possess exceptional (photo)chemical stability, and their corresponding photophysical properties (εmax～180,000; τFL=6.9 ns; ΦFL～60%) make them viable candidates for various photonic applications and are in good agreement with other related multichromophoric PDI-based systems.
Org. compd.
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Paragraph 0123; 0124, (2016/12/16)
PROBLEM TO BE SOLVED: To provide an organic compound exhibiting emission of blue light with high color purity in a solid state. SOLUTION: The compound is expressed by general formula (1). In the formula, RBrepresents a bridged cy
