A Robust Metal–Organic Framework Constructed from Alkoxo-Bridged Binuclear Nodes and Hexamethylenetetramine Spacers: Crystal Structure and Sorption Studies

A neutral 3D metal–organic framework, 3∞[Cu2(mand)2(hmt)]·H2O (1), was constructed from binuclear Cu2O2 alkoxo-bridged nodes, generated by the doubly
deprotonated mandelic
acid. The nodes are connected by hexamethylenetetramine (hmt) spacers,
which act as biconnective bridging ligands, and by carboxylato groups.
Channels are observed along the crystallographic c axis. The water molecules from the channels can be easily removed,
preserving the architecture of the crystal, which is stable up to
280 °C. The Langmuir surface area was found to be 610 m2 g–1. The sorption ability of 1 was
investigated using H2 and CO2.