A TWO-DIMENSIONAL YTTRIUM-ORGANIC COORDINATION POLYMER CONTAINING INFINITE {[Y4(m3-OH)4]8+}n CHAIN
X. Li
Zunyi Normal College, Zunyi 563002, P. R. China
Keywords: yttrium, coordination polymer, crystal structure, hemimellitic acid
Abstract
A two-dimensional (2D) coordination polymer, formulated as [Y4(m3-OH)4(hma)(cba)5] n × × n (Hcba) (1), is synthesized by the synergistic coordination of hemimellitate (H3hma) and 4-chlorobenzoate (Hcba) ligands with Y2O3 under hydrothermal conditions. It has been characterized by single-crystal X-ray diffraction, powder XRD, thermogravimetric analysis, elemental analysis and infrared spectroscopy. Single-crystal X-ray diffraction reveals that it crystallizes in the triclinic crystal system, P space group. Unit cell parameters: a = 11.0280(6) Å, b = 14.5791(10) Å, c = 18.9515(12) Å, a = 72.233(6)°, b = 82.641(5)°, g = 70.933(5)°, V = 2741.1(3) Å3, Z = 2. The asymmetric unit contains a [Y4(m3-OH)4]8+ core which is extended into an infinite {[Y4(m3-OH)4]8+} n chain along the direction of a axis. Every {[Y4(m3-OH)4]8+} n chain is further connected to two neighboring chains by hma3- ligands along the direction of b axis, forming a 2D yttrium-organic layer in the ab plane. Adjacent layers are further packed with each other via hydrophobic interactions to form a three-dimensional (3D) structure.
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