A 3d‐4f Complex Constructed by the Assembly of a Cationic Template, [Cu(en)2]2+, and a 3D Anionic Coordination Polymer, [Sm2(C2O4)3(C5O5)(H2O)2]2– |
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| Authors: | Szu‐Yu Ke Chang‐Tsung Yeh Chih‐Chieh Wang Gene‐Hsiang Lee Hwo‐Shuenn Sheu |
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| Affiliation: | 1. Department of Chemistry, Soochow University, Taipei, Taiwan;2. Instrumentation Center, National Taiwan University, Taipei, Taiwan;3. National Synchrotron Radiation Research Center, Hsinchu, Taiwan |
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| Abstract: | A three‐dimensional (3D) 3d‐4f complex, [Cu(en)2][Sm2(C5O5)(C2O4)3(H2O)2] · 8H2O ( 1 ) (en = ethylenediamine, C5O52– = dianion of 4,5‐dihydroxycyclopent‐4‐ene‐1,2,3‐trione), were prepared via the in‐situ ring‐opening oxidation reaction of croconate in the presence of the template‐directed complex, [Cu(en)2]2+ cation. The structural characterization determined by X‐ray diffraction determination reveals that the 3D anionic coordination polymer of [Sm2(C2O4)3(C5O5)(H2O)2]2– in 1 can be describe in terms of in‐plane 2D honeycomb‐like [Sm2(C2O4)3] layered frameworks bridged by oxalate with bis‐chelating mode, being mutually interlinked via the bridge of μ1,2,3,4‐croconate ligands with bis‐chelating coordination mode to complete the 3D open framework, which gives rise to 1D channels with pore size of 14.023 × 11.893 Å (longest atom–atom contact distances) along the b axis. The structure‐directing complex, [Cu(en)2]2+, and solvated water molecules are resided into these honeycomb‐type hexagonal channels. The thermal stability of 1 was further studied by TGA and in‐situ powder X‐ray diffraction measurement. |
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| Keywords: | Coordination polymer Host‐guest chemistry Samarium Copper Hydrogen bonds |
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