Two new d10 2D layered frameworks based on 1,2,4-triazole bridge: Syntheses,structures, and fluorescence

Two new triazole-bridging d¹⁰ 2D layered frameworks, [Cd(H₂O)₂(Httr)₂](SiF₆) (1), [Zn(ttr)(OAc)] (2) (Httr = 3-amino-1H-1,2,4-triazole), were synthesized with structures and fluorescence characterized. 1 is based on a kind of 16-membered ring with μ₂-1 κN:4 κN coordination mode of Httr and 2 is constructed from the fuse of different 6- and 16-membered rings with μ₃-1 κN:2 κN:4 κN mode of ttr⁻. The hydrogen bondings in 1 and 2 between the anions and ttr connect the 2D layers into 3D supramolecular architectures. The fluorescent studies of compounds 1 and 2 show an important difference, emission at 460 nm in 1 and a dual one at 334 and 462 nm in 2.