|
English
|
正體中文
|
简体中文
|
Items with full text/Total items : 62830/95882 (66%)
Visitors : 4044173
Online Users : 981
|
|
|
Loading...
|
Please use this identifier to cite or link to this item:
https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/25243
|
Title: | Structure and magnetic properties of one-dimensional metal complexes constructed from alternating dicyanamide linked through binuclear metal tetra-2-pyridylpyrazine subunits |
Authors: | Hsu, Guang-Yuan;Chen, Chin-Wang;Cheng, Sung-Chung;Lin, Shin-Huang;魏和祥;Wei, Ho-hsiang;Lee, Chin-Jhin |
Contributors: | 淡江大學化學學系 |
Keywords: | Crystal structure;Dicyanamide;Magnetic properties;Metal complexes;Tetra-2-pyridylpyrazine |
Date: | 2005-03-10 |
Issue Date: | 2009-12-01 |
Publisher: | Kidlington: Pergamon |
Abstract: | The syntheses, structures and magnetic properties of three 1-D complexes with the formulae [Co2(tppz)(dca)4] (1), [Ni2(tppz)(dca)4]C2H5OH (2) and [Cu2(tppz)(dca)(Cl)2](dca) · H2O (3), where tppz = tetra-2-pyridylpyrazine and dca = dicyanamide, are described. Complexes 1–3 are one-dimensional metal-complexes. In 1 the dinuclear tppz-chelated Co(II) centers are linked by two double μ1,5-dca ligands. Compound 2 forms a ladder-like structure in which the rungs are formed by bis-chelating tppz bridged dinuclear Ni(II) ions and the uprights by μ1,5-dca units. Compound 3 forms a helical chain structure which consists of alternately single μ1,5-dca linked dinuclear tppz-chelated Cu-centers. The temperature dependence of magnetic measurements show antiferromagnetic couplings between two metal ions with a pathway through tppz and μ1,5-dca in all cases, with J = −1.10 cm−1, J′ = −0.05 cm−1 for 1, J = −1.28 cm−1, J′ = −0.11 cm−1 and D = 9.50 cm−1 for 2, and J = −10.26 cm−1, J′ = −0.06 cm−1 for 3. |
Relation: | Polyhedron 24(4), pp.487-494 |
DOI: | 10.1016/j.poly.2004.12.010 |
Appears in Collections: | [Graduate Institute & Department of Chemistry] Journal Article
|
Files in This Item:
File |
Description |
Size | Format | |
| | 0Kb | Unknown | 267 | View/Open | Structure and magnetic properties of one-dimensional metal complexes constructed from alternating dicyanamide linked through binuclear metal tetra-2-pyridylpyrazine subunits.pdf | | 678Kb | Adobe PDF | 2 | View/Open |
|
All items in 機構典藏 are protected by copyright, with all rights reserved.
|