Structural diversity of cadmium(II) coordination polymers induced by tuning the coordination sites of isomeric ligands

Liu, Bo, Zhou, Hui-Fang, Hou, Lei, Wang, Jian-Ping, Wang, Yao-Yu and Zhu, Zhonghua (2016) Structural diversity of cadmium(II) coordination polymers induced by tuning the coordination sites of isomeric ligands. Inorganic Chemistry, 55 17: 8871-8880. doi:10.1021/acs.inorgchem.6b01416


Author Liu, Bo
Zhou, Hui-Fang
Hou, Lei
Wang, Jian-Ping
Wang, Yao-Yu
Zhu, Zhonghua
Title Structural diversity of cadmium(II) coordination polymers induced by tuning the coordination sites of isomeric ligands
Journal name Inorganic Chemistry   Check publisher's open access policy
ISSN 1520-510X
0020-1669
Publication date 2016-09-06
Sub-type Article (original research)
DOI 10.1021/acs.inorgchem.6b01416
Open Access Status Not yet assessed
Volume 55
Issue 17
Start page 8871
End page 8880
Total pages 10
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Abstract When the coordination sites of ligands were shifted, the solvothermal reactions of four positional isomeric asymmetrical pyridyldicarboxylatic acids with Cd(NO3)2 generated four new coordination polymers, [Cd(L1)(DMF)3]·DMF·H2O (1), [H2N(CH3)2]2[Cd(L2)2]·3DMF·H2O (2), [Cd(L3)(H2O)2] (3), and [Cd(L4)]·1.5DMF (4), where DMF = N,N-dimethylformamide, H2L1 = 2-(3'-carboxylphenyl)isonicotinic acid, H2L2 = 2-(4'-carboxylphenyl)isonicotinic acid, H2L3 = 5-(3'-carboxylphenyl)nicotic acid, and H2L4 = 2-(3'-pyridyl)terephthalic acid. 1 shows a rare 2D fabric structure. 2 discloses a grid-layer structure with heterochiral helical chains and in which three sets of layers stack in different directions, affording an unprecedented 2D + 2D + 2D → 3D polycatenating framework with 3D intersecting porous systems. 3 also displays a 2D layer possessing strong intralayer π···π interactions and interlayer hydrogen bonds. 4 contains a rare Cd2(COO)4 paddle-wheel unit and forms a 3D framework with 1D open channels. The carboxyl and pyridyl groups of the positional isomeric H2L1-H2L4 ligands show distinct bridging fashions, which leads to the production of versatile architectures of 1-4, and their effects on the crystal structures are discussed. 1-4 reveal solid-state photoluminescence stemming from intraligand charge transfer. 2 and 4 show high selectivity for CO2 over CH4 but with different CO2 adsorption enthalpies. Grand canonical Monte Carlo simulations identified the multiple adsorption sites in 2 for CO2.
Formatted abstract
When the coordination sites of ligands were shifted, the solvothermal reactions of four positional isomeric asymmetrical pyridyldicarboxylatic acids with Cd(NO3)2 generated four new coordination polymers, [Cd(L1)(DMF)3]·DMF·H2O (1), [H2N(CH3)2]2[Cd(L2)2]·3DMF·H2O (2), [Cd(L3)(H2O)2] (3), and [Cd(L4)]·1.5DMF (4), where DMF = N,N-dimethylformamide, H2L1 = 2-(3′-carboxylphenyl)isonicotinic acid, H2L2 = 2-(4′-carboxylphenyl)isonicotinic acid, H2L3 = 5-(3′-carboxylphenyl)nicotic acid, and H2L4 = 2-(3′-pyridyl)terephthalic acid. 1 shows a rare 2D fabric structure. 2 discloses a grid-layer structure with heterochiral helical chains and in which three sets of layers stack in different directions, affording an unprecedented 2D + 2D + 2D → 3D polycatenating framework with 3D intersecting porous systems. 3 also displays a 2D layer possessing strong intralayer π···π interactions and interlayer hydrogen bonds. 4 contains a rare Cd2(COO)4 paddle-wheel unit and forms a 3D framework with 1D open channels. The carboxyl and pyridyl groups of the positional isomeric H2L1-H2L4 ligands show distinct bridging fashions, which leads to the production of versatile architectures of 1-4, and their effects on the crystal structures are discussed. 1-4 reveal solid-state photoluminescence stemming from intraligand charge transfer. 2 and 4 show high selectivity for CO2 over CH4 but with different CO2 adsorption enthalpies. Grand canonical Monte Carlo simulations identified the multiple adsorption sites in 2 for CO2.
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Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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