Syntheses, structures, luminescence and magnetic properties of eleven coordination polymers constructed by a N,N′-sulfuryldiimidazole ligand

Abstract

Reactions of divalent transition metal ions with the N,N′-sulfuryldiimidazole ligand (sdi) gave rise to eleven coordination polymers, namely, [Zn(sdi)(NO₃)₂(H₂O)] (1), [Zn(sdi)₂(NO₃)₂] (2), [Co(sdi)₂(NO₃)₂] (3), [Cu(sdi)₂(NO₃)₂]·2CO(CH₃)₂ (4), [Mn(sdi)₂(H₂O)₂]·2NO₃ (5), [Co(sdi)₂(H₂O)₂]·2ClO₄ (6), [Zn(sdi)(bdc)_0.5(OCH₃)(H₂O)]·ClO₄·H₂O (7), [Cd(sdi)(N₃)₂] (8), [Mn(sdi)(N₃)₂] (9), [Ni(sdi)₂(SO₄)] (10) and [Cd(sdi)_0.5(Hbtc)(OCH₃)] (11) (H₂bdc = 1,4-benzenedicarboxylic acid, H₃btc = 1,3,5-benzenetricarboxylic acid). X-ray single-crystal analyses reveal that they have rich structural chemistry ranging from zero-dimensional (0D) (1), one-dimensional (1D) (2–7), two-dimensional (2D) (8) to three-dimensional (3D) (9–11) networks. Compound 1 displays a 0D structure which consists of [Zn(sdi)]₂ dimers. Compounds 2–7 possess 1D chains with closed loops. Compound 8 shows a 2D (6³) network. Compounds 9 and 10 exhibit 3D uninodal 6-connected pcu frameworks with (4¹²·6³) topology. Compound 11 displays a 3D uninodal 4-connected framework with a CdSO₄-like net (6⁵·8). The effects of metal ions and anions on the final motifs of the compounds have been discussed in detail. All the compounds are characterized using powder X-ray diffraction (PXRD), IR spectroscopy, thermal stability analysis and elemental analyses. Moreover, the photoluminescence properties of 1, 2, 7, 8 and 11 have been investigated. Magnetic investigation of 9 reveals spin canting antiferromagnetic interactions.