Calcium-based coordination polymers from a solvothermal synthesis of HKUST-1 in 3D printed autoclaves
Petr V. Primakov, Gleb L. Denisov, Valentin V. Novikov, О. Л. Лепендина, Аlexander А. Korlyukov, Yulia V. Nelyubina
Abstract
A mixed-metal 1D coordination polymer [CaCu(HBTC) 2 (H2O) 8 ] n (where H 3 BTC – benzene-1,3,5-tric arboxylic acid) was obtained in a solvothermal synthesis of a well-known copper-containing metal–organic framework [Cu 3 (BTC) 2 (H 2 O) 3 ] n (HKUST-1) in autoclaves 3D-printed from commercial polypropylene. This material was a source of calcium ions, apparently, leaking from a colorant (calcium carbonate) promoted by glacial acetic acid as a modulator used to produce large single crystals of HKUST-1. This finding was confirmed by elemental analysis and a model experiment that resulted in a new calcium-based 1D coordination polymer [Ca(H 2 BTC) 2 (H 2 O) 5 ] n under the same solvothermal conditions with no copper or calcium salts put into a 3D-printed autoclave.