Calcium and Strontium Coordination Polymers Based on Rigid and Flexible Aromatic Dicarboxylates: Synthesis, Structure, Photoluminescence and Dielectric Properties

Balendra,; Banday, Azeem; Murugavel, Sevi; Kanaujia, Pawan K.; Prakash, G. Vijaya; Ramanan, Arunachalam

doi:10.1002/slct.201701232

Cited by 13 publications

(13 citation statements)

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“…As expected, the linkers 2,5‐PDC and 2‐PZC favored 1D strontium carboxylate columns in 1–3 resulted in a 3D network; however, the linking of the columns were different. Crystal structures of all strontium carboxylates reported here as well as those reported in our previous works, strongly suggest that the formation of 1D columns made of [SrO n ] polyhedra sharing edges/faces is the major driving force. The solvent molecules, if present, only satisfy the coordination requirement of the metal; the solvents invariably occupy channels/cavities formed in the framework.…”

Section: Resultssupporting

confidence: 86%

“… Structural landscape of Sr‐carboxylate system synthesized in this work as well as in the previous work. Notation: 1JMS, 2JMS and 1–4CS represent the solids reported in our previous work ,…”

Section: Resultsmentioning

confidence: 99%

“…The rigidity, flexibility and inclusion of the lattice solvents greatly influences its dielectric behaviour . In our previous work, we reported that lattice polar solvents or disordered solvent molecules directly contributes to higher values of dielectric constant . Motivated by this observation, we opted for two rigid ( 2,5‐PDC , 2‐PZC ) and two flexible ( SBA, FBA ) ligands.…”

Section: Introductionmentioning

confidence: 99%

“…[43][44][45] In our previous work, we reported that lattice polar solvents or disordered solvent molecules directly contributes to higher values of dielectric constant. [46] Motivated by this observation, we opted for two rigid (2,5-PDC, 2-PZC) and two flexible (SBA, FBA) ligands. The strong coordination between strontium and these ligands will enable us a family of solids with diverse structures and hence one can study structure-dielectric behavior correlation.…”

Section: Introductionmentioning

confidence: 99%

“…Our recent exploration of the structural chemistry of strontiumcarboxylate system using different aromatic carboxylate linkers revealed that 1D columns of strontium carboxylate are the major driving force dictating the multidimensional structures. [46,50] In this work, we have investigated the solvothermal crystallization of strontium ions with five different ligands with an objective to rationalize the supramolecular organization of strontium ions with carboxylate groups. Use of multidentate linkers (2,5-PDC) and (2-PZC) led to 3D CPs driven by 1D strontium carboxylate columns linked by organic bridges in 1-3.…”

Section: Introductionmentioning

confidence: 99%

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Strontium‐Carboxylate‐Based Coordination Polymers: Synthesis, Structure and Dielectric Properties

et al. 2019

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Solvothermal reaction of strontium ions with selected N‐containing and/or V‐shaped carboxylates led to the crystallization of six new coordination polymers: [Sr(2‐PZC)2] (1), [Sr(2,5‐PDC)(DMF)] (2), [Sr(2,5‐PDC)(DMA)] (3), [Sr(IDA)2] (4), [Sr(SBA)(H2O)2].DMF (5) and [Sr2(FBA)2(H2O)2(DMA)2].DMA (6) where, 2‐PZC=2‐pyrazinecarboxylate, 2,5‐PDC=2,5‐pyridinedicarboxylate, IDA=iminodiacetate, SBA=4,4′‐sulfonyldibenzoate and FBA=4,4′ (hexafluoroisopropylidene)bis(benzoate). Crystal structures were determined by single‐crystal X‐ray diffraction analysis and further characterized by powder X‐ray diffraction, elemental analysis, IR spectra, and TG analyses. Single crystal of 1 shows the occurrence of distorted rings made of twelve strontium carboxylate polyhedra connected in 3D. The structures of 2, 3, 5 and 6 are characterized by the presence of strontium carboxylate columns made of edge‐sharing SrOn polyhedra but connected differently to each other through organic linkers. The solids 2 and 3 are isostructural and contain rhombic channels which are occupied by the coordinated solvents. In solid 4, strontium occurred in a rare octahedral geometry bridged by IDA2− extending into 2D sheets. The structural features of 5 and 6 synthesized using V‐shaped ligands show 2D square‐shaped channel network. All the solids showed dielectric constants in the range 8–20. The solvent‐less 1 showed a relatively low dielectric constant (∼8) in comparison to 2, 3 and 4. The solids 5 and 6 with flexible ligands showed higher dielectric constants (∼17 and ∼20 respectively).

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Section: Resultssupporting

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Strontium‐Carboxylate‐Based Coordination Polymers: Synthesis, Structure and Dielectric Properties

et al. 2019

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Calcium‐Based Metal–Organic Frameworks and Their Potential Applications

Xian

Lin

Wang

et al. 2020

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Metal-organic frameworks (MOFs) built on calcium metal (Ca-MOFs) represent a unique subclass of MOFs featuring high stability, low toxicity, and relatively low density. Ca-MOFs show considerable potential for molecular separations, electronic, magnetic, and biomedical applications, although they are not investigated as extensively as transition metal-based MOFs. Compared to MOFs made of other groups of metals, Ca-MOFs may be particularly advantageous for certain applications such as adsorption and storage of light molecules because of their gravimetric benefit, and drug delivery due to their high biocompatibility. This review intends to provide an overview on the recent development of Ca-MOFs, including their synthesis, crystal structures, important properties, and related applications. Various synthetic methods and techniques, types of building blocks, structure and porosity features, selected physical properties, and potential uses will be discussed and summarized. Representative examples will be illustrated for each type of important applications with a focus on their structure-property relations.ethylene/acetylene, propane/propylene) through highly selective size exclusion mechanism, [6,11,24] which has not been achieved by conventional adsorbent materials. The potential uses of MOFs depend on their pore structure (pore size/pore shape), surface functionality, as well as the type of metal centers and ligands.Calcium-based metal-organic frameworks (Ca-MOFs) represent a subgroup of MOFs with calcium as metal centers. Unlike MOFs built on transition and post-transition metals (Zr, Fe, Co, Ni, Cu, Zn, etc.) which tend to form commonly observed SBUs and topology and, therefore allow for successful design and implementation of targeted structure and functionality, the prediction of coordination geometry and structural topology of Ca-MOFs are much more challenging. This could be attributed to the fact that the bonding interactions between calcium and organic ligands (commonly carboxylates or phosphates) are more ionic, and thus the coordination mode of calcium and the topology of Ca-MOFs largely rely on the nature of the organic ligands as well as the synthetic conditions. However, Ca-MOFs possess several advantages compared to those built on transition metals: 1) Ca-MOFs generally feature high thermal stability because of its high electropositivity which leads to strong, ioniclike bonds with organic ligands (e.g., carboxylates). 2) Calcium is earth-abundant (3.4% of Earth's crust) and nontoxic, making Ca-MOFs relatively inexpensive and environmentally safe, thus especially promising for biological related applications. 3) The lightweight of calcium metal offers gravimetric benefit for gas adsorption/storage related applications.To date, more than 150 Ca-MOFs have been reported (Table 1). These MOFs bear different structural features and have been evaluated for various applications, including molecular separation, drug delivery and controlled release, chemical sensing, and proton conductivity, to name a few. In this...

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Synthesis and Structural Characterization of Three New Strontium(II) Coordination Polymers Based on 4-Nitrobenzoate

Parsekar

Bhargao

Näther

et al. 2021

J Inorg Organomet Polym

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Calcium and Strontium Coordination Polymers Based on Rigid and Flexible Aromatic Dicarboxylates: Synthesis, Structure, Photoluminescence and Dielectric Properties

Cited by 13 publications

References 56 publications

Strontium‐Carboxylate‐Based Coordination Polymers: Synthesis, Structure and Dielectric Properties

Strontium‐Carboxylate‐Based Coordination Polymers: Synthesis, Structure and Dielectric Properties

Calcium‐Based Metal–Organic Frameworks and Their Potential Applications

Synthesis and Structural Characterization of Three New Strontium(II) Coordination Polymers Based on 4-Nitrobenzoate

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