STRUCTURE AND PHOTOLUMINESCENT PROPERTY OF A THREE-DIMENSIONAL PILLARED-LAYER La(III)-Cu(I) HETEROMETALLIC COORDINATION POLYMER
A three-dimensional (3D) pillared-layer La(III)-Cu(I) heterometallic coordination polymer (HCP) formulated as [La <sub>2</sub>Cu <sub>4</sub>I <sub>3</sub>(Hina) <sub>7</sub>(H <sub>2</sub>O)] <sub>n</sub> ( <b>1</b>) (Hina = isonicotinic acid), is synthesized by a hydrothermal reaction of La <sub>2</sub>O <sub>3</sub>, CuI, and ina. The crystal structure is determined by single crystal X-ray diffraction. HCP <b>1</b> crystallizes in the monoclinic space group <i>P</i>2 <sub>1</sub>/ <i>c</i> with unit cell parameters: <i>a</i> = 17.0147(3) Å, <i>b</i> = 18.4431(3) Å, <i>c</i> = 16.7487(3) Å, β = 102.469(2)°, <i>V</i> = 5131.84(15) Å <sup>3</sup>, <i>Z</i> = 4. It features a 3D pillared-layer heterometallic organic framework, where Ln-ina layers are pillared by discrete [Cu <sub>8</sub>I <sub>6</sub>(ina) <sub>12</sub>] units along the direction of the <i>a</i> axis. In addition, the solid-state photoluminescent property is investigated.