Lead-Organic Frameworks Containing Trimesic Acid: Facile Dissolution-Crystallization and Near-White Light Emission

초록

Three new, closely similar Pb-based organic frameworks synthesized using a simple and optimized dissolution-crystallization method with benzene-1,3,5-tricarboxylic acid (H3BTC) are reported along with their structural characterizations and photoluminescent properties. Compound 1, Pb(HBTC)(1,4-dioxane)(0.5), crystallizes in the C2/c space group (a = 17.239(2) angstrom, b = 7.0225(8) angstrom, c = 19.911(2) angstrom, beta = 104.735(10)degrees); compound 2, Pb-2(HBTC)(2)(H2O)(5), crystallizes in the P (1) over bar space group (a = 7.3989(4) angstrom, b = 8.2196(4) angstrom, c = 10.1437(5) angstrom, alpha = 94.336(4)degrees, beta = 104.943(4)degrees, gamma = 108.270(3)degrees); and compound 3, Pb(HBTC)(DMF), crystallizes in the P2(1)/n space group (a = 10.5004(3) angstrom, b = 7.1398(3) angstrom, c = 17.1285(5) angstrom, beta 102.160(2)degrees). All three compounds are built from a slightly different one-dimensional (1D) structure interconnected into three-dimensional metal-organic frameworks by HBTC- ligands forming different pore sizes, in which the 1D moieties and pore sizes are governed by the solvent used during synthesis. Among the three compounds, compounds 1 and 2 exhibit solid state photoluminescence with 2 showcasing an interesting, near white -light emission, single component phosphor with CIE coordinates of (0.33, 0.36).

키워드