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2D frameworks self-assembled from a hydrazone ligand and azide salts: synthesis, structures, and luminescent property

Peng Wang, Yu-Shan Wu, Xiao-Meng Han, Shan-Shan Zhao, Jie Qin

Abstract


Three metal-organic coordination polymers {[Cu(L)(N3)]·(H2O)0.25}n (1), {[Zn(L)(N3)]·(H2O)0.5}n(2)and [Cd2(L)2(N3)2(H2O)]n(3)have been synthesized from hydrazone ligand N′-(1-(pyrazin-2-yl)ethylidene)isonicotinohydrazide (HL), NaN3 and corresponding metal nitrates. Complexes were characterized by elemental analysis, IR spectroscopy and single-crystal X-ray diffraction. All three complexes feature 2D coordination network in which L1– acts as NNON tetradentate ligand and azide acts as end-on bridging ligand. In complexes 1 and 2, only intra-sheet hydrogen bonding interactions are found, while the hydrogen bonding interactions between water molecules and host framework result in 3D network for 3. In addition, complexes 2 and 3 exhibited intense fluorescent emissions in the solid state at room temperature.


Keywords


Hydrazone; azide; crystal structure; luminescence property

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DOI: http://dx.doi.org/10.17344/acsi.2017.3268

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