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) Å, b = 7.0225(8) Å, c = 19.911(2) Å, β
= 104.735(10)°); compound 2, Pb2(HBTC)2(H2O)5, crystallizes in the P1̅ space group (a = 7.3989(4) Å, b = 8.2196(4) Å, c = 10.1437(5) Å,
α = 94.336(4)°, β = 104.943(4)°, γ = 108.270(3)°);
and compound 3, Pb(HBTC)(DMF), crystallizes in
the P21
/n space group
(a = 10.5004(3) Å, b = 7.1398(3)
Å, c = 17.1285(5) Å, β = 102.160(2)°).
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).
