Calcium-based coordination polymers from a solvothermal synthesis of HKUST-1 in 3D printed autoclaves

A mixed-metal 1D coordination polymer [CaCu(HBTC)2(H2O)8]n (where H3BTC - benzene-1,3,5-tri carboxylic acid) was obtained in a solvothermal synthesis of a well-known copper-containing 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(H2BTC)2(H2O)5]n under the same solvothermal conditions with no copper or calcium salts put into a 3D-printed autoclave.

Automated summary

The solvothermal synthesis in a 3D-printed autoclave made of commercial polypropylene resulted in a mixed-metal 1D coordination polymer [CaCu(HBTC)2(H2O)8], which served as a source of calcium ions leaked from a colorant and promoted by glacial acetic acid. The experiment also successfully produced a new calcium-based 1D coordination polymer [Ca(H2BTC)2(H2O)5]n under the same solvothermal conditions without copper or calcium salts in the autoclave.