A copper sulfoisophthalate dipyridylpropane coordination polymer with a new, simple 4,4,4-connected trinodal topology

The coordination polymer {[Cu3(sip)2(dpp)4]·14H2O}n (sip = 5-sulfoisophthalate, dpp = 1,3-di(4-pyridyl)propane) was synthesized and structurally characterized by single-crystal X-ray diffraction. The crystallographically distinct copper atoms represent distinct 4-connected nodes that form a novel yet very simple 4,4,4-connected (6482)2(66) topology, which resembles a hybrid of well-known diamondoid and PtS networks. Incipient one-dimensional channels containing chains of disordered water molecules occupy 26.7% of the unit cell volume. Upon removal, the coordination polymer apohost does not permit gas absorption.