| Structural diversity directed by switchable coordination of substitute groups in a ternary Cu(II)-triazole-sulfoisophthalate self-assembly system: synthesis, crystal structures and magnetic behavior. | |
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MedLine Citation:
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PMID: 23138459 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Four magnetic samples with different building blocks and dimensionalities, {[Cu(4)(atr)(2)(μ(3)-OH)(2)(sip)(2)]·4H(2)O}(n) (), {[Cu(4)(atr)(2)(H(2)O)(8)(μ-OH)(2)(sip)(2)]·1.3CH(3)OH·0.7H(2)O}(n) (), {[Cu(3)(atr)(4)(H(2)O)(2)(sip)(2)]·4H(2)O}(n) () and {[Cu(3)(atr)(4)(H(2)O)(2)(μ(3)-OH)(sip)(Hsip)]·2CH(3)OH·2.75H(2)O}(n) () (atr = 4-amino-1,2,4-triazole and sip(3-) = 5-sulfoisophthalate), were obtained and characterized structurally and magnetically. Complex exhibits a three-dimensional (3D) robust framework with butterfly-like Cu(II)(4) clusters periodically extended by tetratopic sip(3-) connectors. Complex possesses a 2D layer with alternating Cu(II)(3) + Cu(II)(1) chains crosslinked by pairs of ditopic sip(3-) linkers. By contrast, the latter two entities feature 1D broad ribbons with linear (for ) and triangular Cu(II)(3) cores (for ) propagated by bidirectional sip(3-) connectors. Structural analysis reveals that the diverse building blocks and dimensionalities of are significantly dominated by the tunable coordination of exocyclic amino- and/or sulfonate-group of the mixed ligands. Magnetically, antiferromagnetic interactions with variable strength transmitted by -NN- moiety of atr and hydroxyl mediators result in overall S = 0 (for ) and 1/2 (for and ) spin ground states. These interesting results indicate that coordinative side group in the ternary metal ion-azolate-carboxylate system can be utilized to generate aesthetically pleasing building units and variably polytopic connectors, leading to differently extended superstructures and magnetic behavior. |
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Authors:
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En-Cui Yang; Zhong-Yi Liu; Cui-Hua Zhang; You-Li Yang; Xiao-Jun Zhao |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-11-9 |
Journal Detail:
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Title: Dalton transactions (Cambridge, England : 2003) Volume: - ISSN: 1477-9234 ISO Abbreviation: Dalton Trans Publication Date: 2012 Nov |
Date Detail:
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Created Date: 2012-11-9 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101176026 Medline TA: Dalton Trans Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, P. R. China. xiaojun_zhao15@yahoo.com.cn encui_yang@yahoo.com.cn. |
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