摘要
By means of solvothermal reactions,a novel lanthanide-mercury compound,{[Ho(IA)3(H3O)2]2n[2n(HgCl4)][n(HgCl5)]}·3nH3O·nH2O(1,HIA=isonicotinc acid)was prepared and structurally characterized by single-crystal X-ray diffraction.Complex 1 crystallizes in the C2/c space group of monoclinic system with a=24.2147(5),b=20.8106(4),c=15.3060(3)Å,β=128.326(2)°,V=6050.8(2)Å3,C36H45Cl13Hg3Ho2N6O20,Mr=2274.26,Z=4,Dc=2.497 g/cm^3,μ(MoKα)=10.817 mm-1 and F(000)=4232.It exhibits a one-dimensional(1-D)chain-like structure.Solid-state photoluminescence measurement shows that it displays brown light emission bands.These emission bands originate from the characteristic emissions of the 4f electrons intrashell transitions of 5S2→5I8 and 5F5→5I8 of the holmium(Ⅲ)ions in 1.The photoluminescence emission energy transfer mechanism is elucidated by the energy level diagrams of the holmium(Ⅲ)ions and isonicotinic acid ligand.Complex 1 has CIE chromaticity coordinates of(0.4361,0.4992).Solid-state UV/Vis diffuse reflectance spectra reveal that it possesses wide optical band gap of 4.94 eV.
基金
Supported by the NNSFC(21361013,31460488),NSF of Fujian(2018J01447)
Jiangxi Provincial Department of Education’s Item of Science and Technology(GJJ170637)
the Open Foundation(20180008)of State Key Laboratory of Structural Chemistry。
