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篇目详细内容 |
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【篇名】 |
Recognition of Anions by Protonated Methylazacalixpyridines |
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【刊名】 |
Frontiers of Chemistry in China |
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【刊名缩写】 |
Front. Chem. China |
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【ISSN】 |
1673-3495 |
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【EISSN】 |
1673-3614 |
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【DOI】 |
10.1007/s11458-009-0094-8 |
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【出版社】 |
Higher Education Press and Springer-Verlag |
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【出版年】 |
2009 |
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【卷期】 |
4
卷3期 |
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【页码】 |
307-312
页,共
6
页 |
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【作者】 |
Hanyuan GONG;
Dexian WANG;
Zhitang HUANG;
Meixiang WANG;
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【关键词】 |
anion recognition; methylazacalixpyridine; protonation |
【摘要】 |
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Methylazacalixpyridines are a unique kind of macrocyclic molecules that are able to self-regulate their conformations to best fit the guests. They had shown good recognition to both neutral molecules such as diols and fullerenes and cations. After protonation, the conformation of methylazacalixpyridines became more flexible and could serve as receptors for anions. In the solution, the protonated methylazacalix[2]pyridine[2]arene formed complexes with halides yielding biding constants of 79 (mol/L)−1 for chloride, 10 (mol/L)−1 for bromide, and 79 (mol/L)−1 for iodide, respectively. The crystal structures of the complexes between protonated methylazacalix[4]pyridine (MACP-4), methylazacalix[2]pyridine[2]arene (MACP-2-A-2), and iodide anion showed a multiple interaction mode including electrostatic attraction, hydrogen bonding, and anion-p interactions. |
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