Synthesis, crystal structures and characterizations of two homochiral coordination polymers based on a chiral reduced Schiff base ligand

Abstract

Two homochiral coordination polymers based on a chiral reduced Schiff base ligand, namely poly[(μ5-4-{[(NR,1S)-(1-carboxylato-2-phenylethyl)amino]methyl}benzoato)zinc(II)], [Zn(C17H15NO4)]n, (1), and poly[(μ5-4-{[(NR,1S)-(1-carboxylato-2-phenylethyl)amino]methyl}benzoato)cobalt(II)], [Co(C17H15NO4)]n, (2), have been obtained by hydrothermal methods and studied by single-crystal X-ray diffraction, elemental analyses, powder X-ray diffraction, thermogravimetric analysis, IR spectroscopy and fluorescence spectroscopy. Compounds (1) and (2) are isostructural and crystallize in the P2(1)2(1)2(1) space group. Both display a three-dimensional network structure with a one-dimensional channel, with the benzyl group of the ligand directed towards the channel. An investigation of photoluminescence properties shows that compound (1) displays a strong emission in the purple region.

Hydrothermal synthesis, crystal structure and photoluminescence of two homochiral zinc(II) coordination polymers

“…By the reaction between the amine group of an l-amino acid and an aldehyde group, we introduced the chiral C atom of the l-amino acid to the Schiff base ligand, and then reduced the C N group to a C-N group in order to enhance the stability of the ligands. We have synthesized several reduced Schiff base compounds based on 4-carboxybenzaldehyde (Ying, 2012;Ying & Huang, 2013;Ying et al, 2014). Compounds based on these ligands easily form three-dimensional structures because there are several coordinating atoms in the ligand.…”

Phenylalanine-Based Co2+ and Cd2+ 1D Coordination Polymers: Structural Properties and Catalytic Application for Solvent-Free Aerobic Oxidation of Cycloalkene

“…Specifically, there are 90 Co and 21 Cd complexes matching these criteria, mostly in the form of polymeric compounds. Further examination revealed that only one system featured an l -Phe-based ligand, resulting in a 3D coordination polymer (ID code: QOCLOL) . On the other hand, in terms of the carboxylate group, the coordination scheme observed in compounds 1 and 2 combines two different coordination modes: μ 2 -η 2 :η 0 and μ 2 -η 1 :η 1 (Figure ).…”

“…Further examination revealed that only one system featured an L-Phe-based ligand, resulting in a 3D coordination polymer (ID code: QOCLOL). 43 On the other hand, in terms of the carboxylate group, the coordination scheme observed in compounds 1 and 2 combines two different coordination modes: μ 2 -η 2 :η 0 and μ 2 -η 1 :η 1 (Figure 1). 44 Another search on the CSD centered on the carboxylate coordination modes demonstrated that the number of systems exhibiting both types of bridges is limited, suggesting again that complexes similar to 1 and 2 are not frequently encountered (Figures S7 and S8).…”

Double Properties of Novel Acylhydrazone Nanomaterials Based on a Conjugated System: Anion Binding Ability and Antibacterial Activity

“…Substituted methyl benzoate was synthesized according to the literature [34]. Substituted benzoic acid (10 mmol), dissolved in methanol (20 mL) and concentrated sulfuric acid (0.5 mL), was added into the above solution.…”