01978nas a2200301   4500008004100000022001400041245007800055210006900133260000800202300000900210490000700219520105200226100002001278700001801298700002401316700001901340700001901359700001801378700002001396700001601416700002201432700001701454700001901471700003201490700002401522700002001546856011001566       2022                        eng d  a1755-433000aPorous covalent organic nanotubes and their assembly in loops and toroids0 aPorous covalent organic nanotubes and their assembly in loops an  cMAY  a507+0 v143 a<p>
	Carbon nanotubes, and synthetic organic nanotubes more generally, have in recent decades been widely explored for application in electronic devices, energy storage, catalysis and biosensors. Despite noteworthy progress made in the synthesis of nanotubular architectures with well-defined lengths and diameters, purely covalently bonded organic nanotubes have remained somewhat challenging to prepare. Here we report the synthesis of covalently bonded porous organic nanotubes (CONTs) by Schiff base reaction between a tetratopic amine-functionalized triptycene and a linear dialdehyde. The spatial orientation of the functional groups promotes the growth of the framework in one dimension, and the strong covalent bonds between carbon, nitrogen and oxygen impart the resulting CONTs with high thermal and chemical stability. Upon ultrasonication, the CONTs form intertwined structures that go on to coil and form toroidal superstructures. Computational studies give some insight into the effect of the solvent in this assembly process.</p>
1 aKoner, Kalipada1 aKarak, Shayan1 aKandambeth, Sharath1 aKarak, Suvendu1 aThomas, Neethu1 aLeanza, Luigi1 aPerego, Claudio1 aPesce, Luca1 aCapelli, Riccardo1 aMoun, Monika1 aBhakar, Monika1 aAjithkumar, Thalasseril, G.1 aPavan, Giovanni, M.1 aBanerjee, Rahul  uhttps://library.ncl.res.in/content/porous-covalent-organic-nanotubes-and-their-assembly-loops-and-toroids