New Heterometallic Coordination Polymers Self-Assembled from Copper(II) Nitrate and (Diamine)PtII(pyridinecarboxylates)2
详细信息 查看全文
- 作者：Rita Song ; Kwan Mook Kim ; and Youn Soo Sohn
- 刊名：Inorganic Chemistry
- 出版年：2003
- 出版时间：February 10, 2003
- 年：2003
- 卷：42
- 期：3
- 页码：821 - 826
- 全文大小：165K
- 年卷期：v.42,no.3(February 10, 2003)
- ISSN：1520-510X
文摘
One-dimensional (1-D), two-dimensional (2-D), and three-dimensional (3-D) coordination polymers were preparedby self-assembly of binary metal complex systems, copper(II) nitrate and (en)PtII(nic)2 or (dmpda)PtII(isonic)2 (en =ethylenediamine, dmpda = 2,2'-dimethyl-1,3-propanediamine, nic = nicotinate, and isonic = isonicotinate), inaqueous solutions. Equimolar reactions of copper(II) nitrate with (dmpda)PtII(isonic)2 and (en)PtII(nic)2 resulted in1-D {[(dmpda)Pt(isonic)2Cu(OH2)3](NO3)2}n (1) and 2-D {[(en)Pt(nic)2Cu(OH2)](NO3)2}n (2), respectively, but thereaction of (en)PtII(nic)2 with excess copper(II) nitrate gave 3-D {[((en)Pt(nic)2)3Cu5(OH)2(OH2)6](NO3)8}n (3). Thelocal structure of crystal 1 has a mononuclear copper unit, 2 has a dinuclear copper unit with a Cu-Cu distanceof 2.659(5) Å, and 3 has a pentanuclear copper unit. The methyl groups of the dmpda ligand are located in thespace between two isonicotinate ligands of 1, which is presumed to be an important factor to determine the finalstructure of the crystal formed by self-assembly. Magnetic behaviors of crystals 1-3 examined in the temperaturerange of 4-300 K appear to be governed by the local structures around the copper(II) ions and do not indicate anysignificant long-range magnetic exchange interactions along the polymeric chain.