Document Detail


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.
MedLine Citation:
PMID:  23138459     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
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.
Authors:
En-Cui Yang; Zhong-Yi Liu; Cui-Hua Zhang; You-Li Yang; Xiao-Jun Zhao
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-9
Journal Detail:
Title:  Dalton transactions (Cambridge, England : 2003)     Volume:  -     ISSN:  1477-9234     ISO Abbreviation:  Dalton Trans     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-9     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101176026     Medline TA:  Dalton Trans     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
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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