A Metal-Organic Framework Containing Arsenic Atoms with a Free Lone Pair

A metal-organic framework (MOF) was constructed based on a 1,4-dihydro-1,4-diarsinine (DHDA) tetracarboxylic acid ligand, which was newly synthesized via hydrolysis of DHDA tetramethyl tetracarboxylate. The lone pairs of the arsenic atoms were not involved in the construction of the MOF. Notably, the preparation procedure of the MOF was performed under ambient atmosphere without any protecting groups, while inert atmosphere is required for incorporating trivalent phosphorus atoms.