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| 題名: | Homo- and heterometallic coordination networks based on linear trinuclear Co(ii) units: Syntheses, structures and magnetic properties |
| 作者: | 楊仲準;Huang, Wun-Jhih;Hsu, Chia-Ju;Tsai, Shao-Kang;He, Hsiu-Yi;Ding, Jaw-Jih;Hsu, Ting-Wei;Yang, Chun-Chuen;Chen, Jhy-Der |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | cobalt;dicarboxylic acids;ferrimagnetic materials;geometry;ligands;magnetic properties;paramagnetism;topology;X-ray diffraction |
| 日期: | 2015-01-01 |
| 上傳時間: | 2026-04-23 12:02:19 (UTC+8) |
| 出版者: | Royal Society of Chemistry |
| 摘要: | 摘要： Two three-dimensional (3D) coordination networks, [Co 3 (1,4-BDC)3( L 1 )] ( L 1 = N , N -bis(3-pyridinyl)-1,4-benzenedicarboxamide; 1,4-H 2 BDC = 1,4-benzenedicarboxylic acid), 1 , and [K 2 Co 3 ( L 2 ) 4 ] (H 2 L 2 = 5-acetamidoisophthalic acid), 2 , have been synthesized by hydrothermal reactions and characterized by single crystal X-ray crystallography. Complex 1 consists of linear trinuclear Co( ii ) centers, which are linked by the 1,4-BDC and L 1 ligands to form a rare (1 + 3) self-catenated 3D net with the new (3 6 ,4 10 ,5 11 ,6) topology, and complex 2 reveals a 3p3d heterometallic coordination network based on linear trinuclear Co( ii ) and dinuclear K( i ) centers bridged by the 6 - L 2 ligands, forming a 4,4,8-connected trinodal net with the new (4 14 6 10 8 4 )(4 2 6 4 )(4 4 6 2 ) topology. The linear trinuclear Co( ii ) centers in 1 adopt the square pyramidaloctahedralsquare pyramidal geometries, whereas those in 2 are tetrahedraloctahedraltetrahedral. Both of the complexes exhibit paramagnetism that is consistent with the CurieWeiss law between 60 and 300 K. The effective magnetic moments (〈 eff 〉) of both complexes are larger than the estimated value of 6.71 B /f.u., revealing the spinorbit couplings that are invoked by the different distorted geometries of the linear trinuclear Co( ii ) centers. The dinuclear K( i ) centers in 2 weaken the magnetic coupling, and reduce the antiferromagnetic ordering at 6 K. The syntheses, structures and magnetic properties of a (1 + 3) self-catenated homometallic 3D net with the (3 6 ,4 10 ,5 11 ,6) topology and a 3p3d heterometallic 3D net showing the (4 14 6 10 8 4 )(4 2 6 4 )(4 4 6 2 ) topology are reported.
出版日期： 2015-01-01
出處： RSC advances, 2015-01, Vol.5 (3), p.23374-23382
資源來源： Royal Society of Chemistry
識別號： ISSN: 2046-2069
識別號： EISSN: 2046-2069
識別號： DOI: 10.1039/c5ra00728c |
| 顯示於類別: | [物理學系] 期刊論文
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