Nitroaromatic detecting zinc cyclohexyldicarboxylate coordination polymers with a long spanning dipyridyl tethering ligand

• Published in: Polyhedron 2019-06, Vol.165, p.143-151
• Main Authors: LaDuca, Andrew R., Przybyla, Jack J., Porta, Angela R., LaDuca, Robert L.
• Format: Article
• Language: English
• Subjects: Coordination polymer; Crystal structure; Hydrothermal synthesis; Luminescence; Zinc
• ISSN: 0277-5387
• DOI: 10.1016/j.poly.2019.03.018

Four new divalent zinc cyclohexyldicarboxylate coordination polymers containing the long-spanning pillaring dipyridyl ligand bis(4-pyridylmethyl)piperazine have been prepared and structurally characterized. Significant structural and topological diversity across the series is evident. The three layered phases showed capability for the detection of small quantities of nitrobenzene in ethanol suspension, while the 3-fold interpenetrated 3D phase did not. [Display omitted] Four new divalent zinc coordination polymers containing a dianionic cyclohexyldicarboxylate and the long-spanning pillaring dipyridyl ligand bis(4-pyridylmethyl)piperazine (bpmp) have been prepared and structurally characterized via single-crystal X-ray diffraction. Significant structural and topological diversity across the series is evident. {[Zn2(cis-12cdc)2(bpmp)]·6H2O}n (1, cis-12cdc = cis-1,2-cyclohexanedicarboxylate) shows a coordination polymer layer motif with embedded paddlewheel {Zn2(OCO)4} dinuclear units and T6(4)4(4) classification water tapes. Using cis-1,2-cyclohex-4-enedicarboxylate (cis-12chedc) afforded [Zn2(cis-12chedc)2(bpmp)(H2O)2]n (2), which manifests a simple yet unusual (6)(648.10) topology. [Zn2(cis-13cdc)2(bpmp)]n (3, cis-13cdc = cis-1,3-cyclohexanedicarboxylate) displays sawtooth (4,4) coordination polymer layers, while [Zn2(trans-14cdc)2(bpmp)]n (4, trans-14cdc = trans-1,4-cyclohexanedicarboxylate) shows a 3D system of coordination polymer networks with 3-fold interpenetrated 41263pcu topology. The layered phases 1–3 showed capability for the detection of small quantities of nitrobenzene in ethanol suspension.