Guest-induced expanding and shrinking porous modulation based on interdigitated metal–organic frameworks constructed by 4,4′-sulfonyldibenzoate and barium ions

Construction of Two 3D Main Group Coordination Polymers Based on 2‐(2‐Pyridyl)‐4,5‐imidazole‐dicarboxylic Acid: Structures and Luminescent Properties

“…Herein, as an continuous exploration, their positional isomer, 2‐(2‐pyridyl)‐4,5‐imidazole‐dicarboxylic acid (Scheme a), was chosen as an organic linker. In addition, the Ba(II) ion is aware of attention due to its flexible coordination geometry, widely distributed, low cost, and low toxicity 41,42. And the Pb II ion bearing a stereochemically active electron lone‐pair and large ionic radius can display both hemidirected and holodirected coordination arrangements with various coordination numbers from 2–10, and easy to display ligand to metal charge transition (LMCT) luminescent property 43,44.…”

Syntheses and Structures of Two Novel Interdigitated Metal‐Quinolone Complexes: [Cu2(cfH)2(bptc)(H2O)]·4H2O and [Zn2(levofH)2(odpa)]·5.5H2O

“…As an extension of our previous work, [15,24,34,38,45] we chose cfH, levofH and long aromatic polycarboxylate ligands in an attempt to construct 1D interdigitated metal‐drug compounds, based on the following considerations: (i) The bulky quinolones usually act as one‐end coordinated ligands,41–44 which can be regarded as side arms, the side arms are necessary for interdigitated frameworks 23,50,51. (ii) Aromatic polycarboxylate ligands like bptc (3,3′,4,4′‐benzophenonetetracarboxylate) (Scheme b) or odpa (4,4′‐oxydiphthalate) (Scheme d) can link discrete metal‐quinolone motifs into a 1D chains structure via their bridging ability.…”

Crystal structure of the BaII-based CoII-containing one-dimensional coordination polymer poly[[aqua{μ4-2,2′-[(4,10-dimethyl-1,4,7,10-tetraazacyclododecane-1,7-diyl)bis(methylidene)]bis(4-oxo-4H-pyran-3-olato)}perchloratocobaltbarium] perchlorate]

“…According to a Cambridge Structural Database (CSD, Version 5.38, May 2017; Groom et al, 2016) search, alkaline-earth metal-based CPs are less common compared to the reported transition metal and rare-earth metal CPs (Cai et al, 2017). Indeed, the study of alkaline-earth-metal systems is limited by challenges in the synthesis (Lian et al, 2016;Douvali et al, 2015;Mali et al, 2015;Chakraborty et al, 2014;Zhang, Huang et al, 2012;Liu, Tsao et al, 2010), the main reason being the variable coordination numbers (the most preferred coordination numbers are six for magnesium, six to eight for calcium, and six to twelve for strontium and barium), which lead to uncontrolled coordination geometries around the metal centre (Cai et al, 2016;Feng et al, 2015;Shi et al, 2015;Zheng et al, 2015;Jia et al, 2014;Zhang, Yuan et al, 2013;Smith et al, 2013;Zhai et al, 2013;Zhang, Guo et al, 2013;Deng et al, 2012;Foo et al, 2012;Xiao et al, 2012;Xie et al, 2012;Zhang, Luo et al, 2012;Jing et al, 2010;Zhang et al, 2010;Li et al, 2009).…”

“…Recently, the interest in alkaline-earth metal ion-based CPs has been growing due to their unusual advantages such as low toxicity, wide distribution and low cost, which are of benefit for applications in the field of materials science (Raja et al, 2014;Foo et al, 2012Foo et al, , 2013Xiao et al, 2012 earth metal-based CPs are less common compared to the reported transition metal and rare-earth metal CPs (Cai et al, 2017). Indeed, the study of alkaline-earth-metal systems is limited by challenges in the synthesis (Lian et al, 2016;Douvali et al, 2015;Mali et al, 2015;Chakraborty et al, 2014;Zhang, Huang et al, 2012;Liu, Tsao et al, 2010), the main reason being the variable coordination numbers (the most preferred coordination numbers are six for magnesium, six to eight for calcium, and six to twelve for strontium and barium), which lead to uncontrolled coordination geometries around the metal centre (Cai et al, 2016;Feng et al, 2015;Shi et al, 2015;Zheng et al, 2015;Jia et al, 2014;Zhang, Yuan et al, 2013;Smith et al, 2013;Zhai et al, 2013 Besides, the ability of a system to bind alkaline-earth metal ions in aqueous solution is highly desirable and can be achieved thanks to the presence of oxygenated ligands and the preorganization of the receptor, which satisfies the need for a high coordination number without specific coordination requirements.…”

“…Recently, the interest in alkaline-earth metal ion-based CPs has been growing due to their unusual advantages such as low toxicity, wide distribution and low cost, which are of benefit for applications in the field of materials science (Raja et al, 2014;Foo et al, 2012Foo et al, , 2013Xiao et al, 2012). According to a Cambridge Structural Database (CSD, Version 5.38, May 2017; Groom et al, 2016) search, alkaline-earth metal-based CPs are less common compared to the reported transition metal and rare-earth metal CPs (Cai et al, 2017).…”