Main‐chain 1,2,3‐triazolium‐based poly(ionic liquid)s issued from AB + AB click chemistry polyaddition

Abstract

present the synthesis of four new chiral monomers and polymers based on menthol. Their chemical structures, phase behavior, and thermal stability are characterized by FT-IR, NMR, DSC, POM, XRD, and TGA. By inserting a flexible spacer between the mesogenic core and the terminal menthyl groups, the target monomers and polymers can form the SmC*, cholesteric, and SmA phases. By increasing the mesogenic core rigidity, the corresponding T m , T g , and T i increased. In addition, increasing the spacer length decreased the T m and T g , while T i increased. POLYMER NANOSPHERES Polyacetylenes are formed upon irradiation with gamma rays of ortho-substituted aryl alkynes 2-RC 6 H 4 CBCH (R = CF 3 , OMe, Me) in methanol solutions. An osmosis driven manipulation allows the soluble polymers to aggregate in the form of nanospheres, as well as hollow nanospheres, of different dimensions. The finding and development of this transition metal-free activation process of terminal alkynes come from the collaboration of three research groups with authors Mauro Bassetti, Ilaria Fratoddi, Laura Lilla, Chiara Pasquini, Maria Vittoria Russo, and Ornella Ursini, as presented on page 5097. The SEM image in the picture highlights the shape and size of the nanoparticles obtained via the osmosis-based methodology for one of these polymers (R = CF 3).

Design, synthesis of novel starch derivative bearing 1,2,3-triazolium and pyridinium and evaluation of its antifungal activity

“…2) corroborates the alkylation reaction through the disappearance of the peak corresponding to the proton of the 1,2,3-triazole group at a signature value of 7.49 ppm and the appearance of new signals for the 1,2,3-triazolium proton at 8.97 ppm (Sood et al, 2014). Indeed, besides significant shift for the chemical displacement of the 1,2,3-triazolium proton compared with the 1,2,3-triazole proton, completion of the alkylation reaction is also corroborated by the appearance of new signals at 4.47 ppm for the pendant methyl group of 1,2,3-triazolium and pyridinium (Dimitrov-Raytchev, Beghdadi, Serghei, & Drockenmuller, 2013). In addition, all signals of the pyridinium and adjacent methylene groups are shifted towards down field compared to those initially neighboring the 1,2,3-triazole and pyridine groups, which leads to the partial overlap between 1,2,3-triazolium proton and pyridinium protons.…”

Stereoregular poly(methyl methacrylate) with double-clickable ω-end: synthesis and click reaction

“…[3][4][5] From the viewpoint of polymer synthesis, to say nothing of the polyaddition via click chemistry, [6][7][8][9][10][11] polymers possessing clickable pendant groups 12,13 and/or end-functionalities [14][15][16] have attracted researchers' attention, as such polymers can be used as 'building blocks' for syntheses of highly functionalized polymers, 17,18 construction of sophisticated topology, 19,20 and surface modification 21,22 .…”

Synthesis, characterization, and antifungal evaluation of novel 1,2,3-triazolium-functionalized starch derivative

“…Moreover, the 1 H NMR spectrum of starch derivative (D) corroborates the quaternization through the disappearance of the peak corresponding to the proton of the 1,2,3-triazole group at 7.62 ppm and the appearance of new signal for the proton of the 1,2,3-triazolium at 8.40 ppm [19,32]. In addition, completion of the quaternization is also corroborated by the appearance of new signals at 5.77 and 7.20-7.50 ppm for the methylene and phenyl groups of the pendant benzyl moiety, respectively [12,33].…”

“…Tan et al synthesized four different starchlinked-1,2,3-triazole derivatives bearing electron-withdrawing groups via 1,3-dipolar cycloaddition and further evaluated for in vitro antibacterial potential [18]. Besides, 1,2,3-triazolium cations have recently been developed by quaternization of 1,2,3-triazoles with halogenide [19,20]. However, there are very few reports on synthesis of starch derivatives bearing 1,2,3-triazolium cations, and the effect of quaternization of 1,2,3-triazole moieties with benzyl bromide on the bioactivity of starch derivative was still unknown.…”