A porous coordination polymer of Sn-Cu xylarate [Sn4Cu8.5(HL)2(L)4O2(OH)(H2O)12.5] · 17.2H2O (H5L is xylaric acid) is synthesized for the first time and characterized by chemical analysis, IR spectroscopy, and X-ray diffraction. Centrosymmetric heterometallic fragments [Sn4Cu6(HL)2(L)4O2(H2O)6] (A) including copper Cu1–3 and tin Sn1,2 atoms are distinguished in the structure. The Cu4(OH)0.5(H2O)2.5 bridges connect A units into chains running along the c axis, and the Cu5(OH)(H2O) bridges connect A fragments into layers perpendicular to the c axis. The Cu4,5 atoms form a framework whose voids accommodate the crystallization water molecules.

The porous coordination polymer of Sn-Cu xylarate shows a unique structure with a centrally symmetric heterometallic fragments and a unique water-absorption capacity.

Crystallography Reports

Synthesis and physicochemical characterization of a porous coordination polymer of Sn-Cu xylarate: The structure of [Sn4Cu8.5(HL)2(L)4O2(OH)(H2O)12.5] · 17.2H2O

Synthesis and physicochemical characterization of a porous coordination polymer of Sn-Cu xylarate: The structure of [Sn4Cu8.5(HL)2(L)4O2(OH)(H2O)12.5] · 17.2H2O

Key Takeaway: The porous coordination polymer of Sn-Cu xylarate shows a unique structure with a centrally symmetric heterometallic fragments and a unique water-absorption capacity.