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@article{720361,
author = {Jess, Inke and Táborský, Petr and Pospíšil, Jiří and Naether, Christian},
article_number = {22},
keywords = {coordination polymers luminescence},
language = {eng},
issn = {1477-9226},
journal = {Dalton Transactions},
note = {koordinační polymery luminiscence},
title = {Synthesis, crystal structure, thermal and luminescence properties of CuX(2,3-dimethylpyrazine) (X = Cl, Br, I) coordination polymers},
volume = {2007},
year = {2007}
}
TY - JOUR
ID - 720361
AU - Jess, Inke - Táborský, Petr - Pospíšil, Jiří - Naether, Christian
PY - 2007
TI - Synthesis, crystal structure, thermal and luminescence properties of CuX(2,3-dimethylpyrazine) (X = Cl, Br, I) coordination polymers
JF - Dalton Transactions
VL - 2007
IS - 22
SP - 2263-2270
EP - 2263-2270
PB - The Royal Society of Chemistry
SN - 14779226
N1 - koordinační polymery luminiscence
KW - coordination polymers luminescence
N2 - Three new coordination polymers based on CuI and 2,3-dimethylpyrazine (2,3-dmpyz) were prepared,structurally characterized and investigated for their thermal and luminescence properties. In the ligand rich 2 : 3 compound [(CuI)2(2,3-dmpyz)3] 1 (CuI)2 dimers are found, which are connected by the N-donor ligands into chains, whereas in the structure of the 1 : 1 intermediate [(CuI)(2,3-dmpyz)] 2 (CuI)4 tetramers are found, which are also connected into chains. The crystal structure of the ligand deficient 2 : 1 compound [(CuI)2(2,3-dmpyz)] 3 is built up of CuI double chains, which are connected by the 2,3-dmpyz ligands into layers. Thermal decomposition of 1 results in its direct transformation into the ligand deficient compound 3, without the formation of the 1 : 1 compound 2 as an intermediate. A similar thermal reactivity is found for compound 2, which transforms into 3 on heating. Stirring of a crystalline suspension of pure 1 or 2 in acetonitrile, always leads to a transformation into the ligand deficient compound 3 indicating that compound 3 is the most stable of all the coordination polymers, whereas compounds 1 and 2 are metastable. The luminescence properties of the CuCl and CuI coordination polymers were investigated at 298 and 77K. It was observed that the emission maxima strongly depends on the nature of the halide atom and the composition and structure of the coordination polymers. In addition, several of these compounds show luminescence thermochromism. These results are compared with those obtained for the previously reported CuCl and CuBr(2,3-dimethylpyrazine) coordination polymers.
ER -
JESS, Inke, Petr TÁBORSKÝ, Jiří POSPÍŠIL and Christian NAETHER. Synthesis, crystal structure, thermal and luminescence properties of CuX(2,3-dimethylpyrazine) (X = Cl, Br, I) coordination polymers. \textit{Dalton Transactions}. The Royal Society of Chemistry, 2007, vol.~2007, No~22, p.~2263-2270. ISSN~1477-9226.
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