Multifunctional Cobalt(II) Coordination Polymers Tuned by Flexible Bis(pyridylamide) Ligands with Different Spacers and Polycarboxylates

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• 作者：Xiu-li Wang ; Fang-fang Sui ; Hong-yan Lin ; Ju-wen Zhang ; Guo-cheng Liu
• 刊名：Crystal Growth & Design
• 出版年：2014
• 出版时间：July 2, 2014
• 年：2014
• 卷：14
• 期：7
• 页码：3438-3452
• 全文大小：1090K
• ISSN：1528-7505

文摘

Ten multifunctional cobalt(II) coordination polymers with the formulas of [Co(L¹)_0.5(5-AIP)]路H₂O (1), [Co(L²)(5-AIP)(H₂O)₂] (2), [Co(L³)_0.5(5-AIP)] (3), [Co(L⁴)_0.5(5-AIP)(H₂O)]路2H₂O (4), [Co(L⁵)(5-AIP)] (5), [Co(HBTC)(L³)]路H₂O (6), [Co(HBTC)(L⁶)(H₂O)]路3H₂O (7), [Co(L²)(1,3-BDC)(H₂O)₂] (8), [Co₂(L³)₂(1,3-BDC)₂]路4H₂O (9), and [Co₂(L⁴)_1.5(1,2-BDC)(渭₂-OH)(渭₃-OH)(H₂O)]路H₂O (10) have been prepared by a hydrothermal technique employing six flexible bis(pyridylamide) ligands with different spacers (L¹ = N,N鈥?bis(3-pyridyl)oxamide, L² = N,N鈥?bis(3-pyridyl)malonamide, L³ = N,N鈥?di(3-pyridyl)succinamide, L⁴ = N,N鈥?bis(3-pyridyl)adipamide, L⁵ = N,N鈥?bis(3-pyridyl)heptandiamide, L⁶ = N,N鈥?bis(3-pyridyl)sebacicdiamide) and four aromatic polycarboxylic acids mixed ligands (5-H₂AIP = 5-aminoisophthalic acid, H₃BTC = 1,3,5-benzenetricarboxylic acid, 1,3-H₂BDC = 1,3-benzenedicarboxylic acid, and 1,2-H₂BDC = 1,2-benzenedicarboxylic acid). Compound 1 exhibits a two-dimensional (2D) double-layer network. Compounds 2 and 8 are isostructural and possess one-dimensional (1D) circle-connecting-circle chain structures derived from 1D [Co(L²)]_n 鈥溛┾€?like chain and 1D [Co(5-AIP)]_n/[Co(1,3-BDC)]_n wavelike chain. Compound 3 possesses a 3,8-connected three-dimensional (3D) coordination framework with {4².6}₂{4⁴.6¹⁰.7⁹.8⁵} topology. Compound 4 is a 2D network containing a ladder-like chain. Compound 5 reveals a novel 3-fold interpenetrating CdSO₄-like framework. Compound 6 is a double-layer coordination network with a (3,5)-connected {4²路6⁷路8}{4²路6} topology. Complex 7 shows a 2D (4,4) grid layer. Compound 9 features a 2-fold interpenetrating 3D 伪-Po-related topological framework. Compound 10 is a 6-connected 3D coordination polymer with a {4¹².6³} topology. The spacer length of the bis(pyridylamide) ligands, as well as the substituent group and carboxyl group number of polycarboxylates, shows a significant effect on the ultimate architectures of various cobalt(II) compounds 1鈥?b>10. The electrochemical behaviors of carbon paste electrodes (CPEs) bulk-modified by compounds 1鈥?b>10 and the electrocatalytic activities of 1-, 6-, 9-, 10-CPEs have been investigated. The photocatalytic properties of compounds 1鈥?b>10 toward the degradation of methylene blue (MB) in visible light irradiation have been investigated. The variable temperature magnetic susceptibilities for compounds 3, 5, 9, and 10 indicate the existence of antiferromagnetic exchange interactions.