Assembly of Cd(<scp>ii</scp>) coordination polymers: structural variation, supramolecular isomers, and temperature/anion-induced solvent-mediated structural transformations

Hou, Shuangshuang; Huang, Xianwei; Guo, Jun-Gu; Zheng, Sheng‐Run; Lei, Jing; Tan, Jing‐Bo; Fan, Jun; Zhang, Weiguang

doi:10.1039/c4ce01779j

Cited by 35 publications

(8 citation statements)

References 73 publications

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“…Metal–organic frameworks (MOFs) have been rapidly developed in recent years and received great attention not only due to their intriguing structures and diverse topologies, but also because of their interesting properties and possible applications as functional materials. − However, it is still a big challenge to rationally and predictably prepare the desired crystalline products. The resulting structures will be determined by several factors, including the coordination geometry of metal ions, the structural characteristics of ligands, the solvent system, temperature, counteranions, − and so forth. Among these factors, anions have attracted considerable attention due to their great effect on the crystal packing and topologies of coordination polymers in terms of their differences in the size, shape, charge, coordination ability, as well as the coordination modes to metal ions.…”

Section: Introductionmentioning

confidence: 99%

“…The unusual structures, topologies, roles of anions, and photoluminescence properties are described and discussed in detail. To the best of our knowledge, this paper presents the largest number of inorganic anions that have been involved in coordination in all the reported literature, − which offers an opportunity for us to discuss the roles of anions.…”

Section: Introductionmentioning

confidence: 99%

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Twelve Cadmium(II) Coordination Frameworks with Asymmetric Pyridinyl Triazole Carboxylate: Syntheses, Structures, and Fluorescence Properties

Wang

et al. 2019

Crystal Growth & Design

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Based on an asymmetric pyridinyl triazole carboxylate ligand 1-(4pyridinylmethyl)-1H-1,2,4-triazole-3-carboxylic acid (Hpmtc), 12 cadmium(II) polymers {Cd 1.5 (pmtc) 11), and [Cd(pmtc)-(I)] n (12) have been synthesized and structurally characterized. Employment of different anions has resulted in different architectures and topological structures, ranging from twodimensional (2D) to three-dimensional (3D) frameworks, in which 2 and 4 present a new (4 2 • 6•10 3 )(4 2 •6 3 •8) 2 (4 2 •6) topology. Through calculations to the frontier molecular orbital (FMOs) of 9−11, their photoluminescence should be assigned as the n → π* transition. Moreover, the photoluminescent properties of 1−12 indicate that the coordination anions make great contribution to fluorescent emission of Cd(II) polymers.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Twelve Cadmium(II) Coordination Frameworks with Asymmetric Pyridinyl Triazole Carboxylate: Syntheses, Structures, and Fluorescence Properties

Wang

et al. 2019

Crystal Growth & Design

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“…However, the incorporation of alkaline earth metal ions into heterometallic frameworks is a challenging task at present, since there are a number of factors that have unforeseeable influences on the self‐assembly process, such as the coordination nature of different metal ions and the selection of organic ligands, template agents, solvent systems, reactant stoichiometry, pH values, etc . The complicated competition between transition metals and alkaline earth metals for coordination of the same ligand often leads to the generation of preferably homometallic frameworks instead of heterometallic ones .…”

Section: Introductionmentioning

confidence: 99%

Syntheses, Structures, Luminescence, and Gas Adsorption Properties of Two New Heterometallic Complexes Involving Alkaline Earth Metals (Ca, Ba)

Zhang

Liu

2019

Zeitschrift anorg allge chemie

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Two new 3D heterometallic frameworks, [Me 2 NH 2 ][CaCd 2 (BTC)(HBTC) 2 ]·4H 2 O( 1) and [Ba 11 Co 2 (BTC) 8 (μ 3 -OH) 2 (μ 2 -H 2 O) 6 (H 2 O) 16 ] (2) (H 3 BTC = 1,3,5benzenetricarboxylic acid, Me 2 NH 2 = protonated dimethylamine), were synthesized using solvothermal and hydrothermal techniques, respectively. Complex 1 features a 3D microporous framework; it contains hourglass-like trinuclear [CaCd 2 (COO) 6 ] clusters that are bridged by -COOgroups and form zigzag chains. These chains are further interlinked by the -COOgroups of BTC 3ligands into 2D layers with interesting flower-like configuration, which, in turn, are connected by HBTC 2ligands to afford the 3D structure. Me 2 NH 2 + cations not only

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“…Actually, supramolecular isomerism is not just a challenge or obstacle, but also a good opportunity for developing novel materials and a better understanding of self-assembly and crystal growth . Since the concept “supramolecular isomerism” was discussed by Zaworotko in 2001, the design and synthesis of supramolecular isomers have received increasing attention. − …”

Section: Introductionmentioning

confidence: 99%

A Family of Fe(II)/Cl Supramolecular Coordination Systems Incorporating 5,5′-Di(pyridin-2-yl)-3,3′-bi(1,2,4-triazole)

Yao

Tao

et al. 2015

Crystal Growth & Design

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By using a new N-heterocyclic building block, 5,5′-di(pyridin-2-yl)-3,3′-bi(1,2,4-triazole) (2,2′-H 2 dbpt), five novel coordination complexes, Fe 4 (2,2′-Hdbpt) 2 Cl 6 (H 2 O) 6 (1), [Fe(2,2′-H 2 dbpt)Cl 2 ·H 2 O] n (2), [Fe(2,2′-H 2 dbpt)Cl 2 ] n (3), [Fe 2 (2,2′-H 2 dbpt)Cl 4 ] n (4), and [Fe(2,2′-H 2 dbpt) 0.5 Cl 2 ] n (5), based on a Fe(II)/Cl system with diversiform connectivity from zero-to two-dimensional (2D) were constructed successfully. By regulating the metal−ligand ratio and solvents, 2,2′-H 2 dbpt changed various coordination modes. Consequently, 1 reveals a discrete Fe 4 (2,2′-Hdbpt) 2 Cl 6 (H 2 O) 6 supramolecule. 2 and 3 are pseudo-polymorphic. 2 reveals a helical chain based on the cis-FeCl 2 N 4 unit and the cis-bridging 2,2′-H 2 dbpt ligand, while 3 reveals a straight-chain based on the trans-FeCl 2 N 4 unit and the transbridging 2,2′-H 2 dbpt ligand. 4 and 5 are also supramolecular isomers. Different from 2 and 3, both of them have a cis-FeCl 2 N 4 unit. Owing to the different rotation angles of pyridine rings in 2,2′-H 2 dbpt, 4 and 5 reveal a one-dimensional modified trapezoid chain based on the trans-bridging 2,2′-H 2 dbpt ligand and a 2D wave-like layer based on the cis-bridging 2,2′-H 2 dbpt ligand, respectively. Furthermore, compound 4 could also be viewed as a wave banded chain constructed by 3 with μ 2 -Cl ions replaced by the terminal Cl ions and water molecules from another perspective. 1 reveals weak antiferromagnetic behavior. 2, and 3 both reveal paramagnetic behavior, while 4 and 5 both reveal ferromagnetic behavior. These results indicate that 2,2′-H 2 dbpt is an excellent multi-connection linker to construct supramolecular coordination complexes with interesting structures and properties. ■ INTRODUCTIONThe design and synthesis of supramolecular coordination complexes have attracted remarkable attention in the realm of supramolecular chemistry and crystal engineering, not only owing to their appealing structural and topological novelty but also because of their tremendous potential applications in gas storage and separation, 1−5 electrical conduction, 6−9 luminescence materials, 10−20 molecular magnets, 21−26 and heterogeneous catalysis. 27−32 However, how to rationally design and synthesize supramolecular coordination complexes with the desired structure and properties is still a challenge up to now. The assembly of such supramolecular systems may be easily affected by many factors, including the coordination geometry of the central metal ions, solvents, 33−35 ligand structure, metal− ligand ratio, 36,37 counterions, 38−40 pH, 41−44 temperature, 45,46 and so on. Among the reported studies, much effort has been focused on the rational design and controlled synthesis of coordination polymers using multidentate ligands such as polycarboxylate acids, phosphonic acids, and organic ligands containing heterocyclic triazolyl groups. 47 5,5′-Di(pyridin-2-yl)-3,3′-bi(1,2,4-triazole)(2,2′-H 2 dbpt) may be a excellent multidentate ligand to construct supramolecular coordination complexes...

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Assembly of Cd(ii) coordination polymers: structural variation, supramolecular isomers, and temperature/anion-induced solvent-mediated structural transformations

Cited by 35 publications

References 73 publications

Twelve Cadmium(II) Coordination Frameworks with Asymmetric Pyridinyl Triazole Carboxylate: Syntheses, Structures, and Fluorescence Properties

Twelve Cadmium(II) Coordination Frameworks with Asymmetric Pyridinyl Triazole Carboxylate: Syntheses, Structures, and Fluorescence Properties

Syntheses, Structures, Luminescence, and Gas Adsorption Properties of Two New Heterometallic Complexes Involving Alkaline Earth Metals (Ca, Ba)

A Family of Fe(II)/Cl Supramolecular Coordination Systems Incorporating 5,5′-Di(pyridin-2-yl)-3,3′-bi(1,2,4-triazole)

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