MaterialsZinc acetare dihydrate was purchased from Alfa Aeasr. Acetylenedicarboxylic acid and triethylamine were purchased from Fluka. DMF was purchased from Fisher Scientific. All materials were used without further purification.InstrumentationPowder X-ray diffraction patterns were collected with a Bruker AXS D8 Advanced diffractometer operated at 40 kv and 40 mA with monochromated Cu Ka radiation and with a scan speed of s/step and a step size of
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