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

Abstract

Metal-organic frameworks (MOFs) have potentially useful applications and an intriguing variety of architectures and topologies. Two homochiral coordination polymers have been synthesized by the hydrothermal method, namely poly[(μ-N-benzyl-L-phenylalaninato-κ(4)O,O':O,N)(μ-formato-κ(2)O:O')zinc(II)], [Zn(C16H16NO2)(HCOO)]n, (1), and poly[(μ-N-benzyl-L-leucinato-κ(4)O,O':O,N)(μ-formato-κ(2)O:O')zinc(II)], [Zn(C13H18NO2)(HCOO)]n, (2), and studied by single-crystal X-ray diffraction, elemental analyses, IR spectroscopy and fluorescence spectroscopy. Compounds (1) and (2) each have a two-dimensional layer structure, with the benzyl or isobutyl groups of the ligands directed towards the interlayer interface. Photoluminescence investigations show that both (1) and (2) display a strong emission in the blue region.

A new ZnII coordination polymer based on 4-(pyridin-4-yl)benzoic and formic acids: in-situ synthesis, crystal structure and luminescence properties

“…2.446 (3) Å for layer A and 2.535 (3) Å for layer B. Moreover, the Zn1A-O2A and Zn1B-O2B bond lengths are 2.555 (1) and 2.539 (2) Å , which are in agreement with the range of values reported for Zncarboxylate units (Tang et al, 2016;Ying et al, 2015). The other Zn-O bond lengths are typical and in the range 1.962 (2)-2.005 (3) Å (Liu et al, 2016;Swiatkowski & Kruszynski, 2017).…”

Assembly of ZnIIand CdIIcoordination polymers with different dimensionalities based on the semi-flexible 3-(1H-benzimidazol-2-yl)propanoic acid ligand

“…The exploration of metal-organic frameworks (MOFs) have received much attention because of their intriguing architectures and wide range of potential applications in different fields (Castellanos et al, 2016;Zhang et al, 2016;Kumar et al, 2015;Liu et al, 2016;Mü ller-Buschbaum et al, 2015;Duerinck & Denayer, 2015;Mohan et al, 2015). The assembly of Zn II (Jurcic et al, 2015;Karmakar et al, 2016a,b;Liang et al, 2016;Wannapaiboon et al, 2015;Ying et al, 2015) and Cd II (Xiao et al, 2015, Wu et al, 2011, Hu et al, 2015, Cao et al, 2014, Zhang et al, 2015 ions with multidentate nitrogen-containing ligands has produced various MOFs with fascinating structures and luminescent properties. The selection of chelating or bridging organic linkers often favors a structure-specific assembly and the factors that govern the formation of such complexes are complicated and include not only the nature of the Zn II and Cd II ions and ligand structure but also anion-directed interactions as well as reaction conditions.…”