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http://dx.doi.org/10.5012/bkcs.2004.25.4.471

Solubilities of Salen Derivatives and Their Cobalt Complex in Liquid and Supercritical CO2  

Koh, Seung-Hyun (Green Nuclear Research Lab., EIRC, Kyung Hee University)
Jeon, Byung-Wan (Green Nuclear Research Lab., EIRC, Kyung Hee University)
Kim, Ha-Kwon (Green Nuclear Research Lab., EIRC, Kyung Hee University)
Park, Kwang-Heon (Green Nuclear Research Lab., EIRC, Kyung Hee University)
Kim, Hong-Doo (Green Nuclear Research Lab., EIRC, Kyung Hee University)
Publication Information
Bulletin of the Korean Chemical Society / v.25, no.4, 2004 , pp. 471-475 More about this Journal
Abstract
The solubility of N,N'-Bis(salicylidene) ethylenediamine (n-salen) and N,N'-bis(3,5-di-tert-butylsalicylidene) ethylenediamine (t-butyl-salen) was studied with in-situ UV-VIS spectrometer. n-Salen is 3-5 times more soluble than t-butyl-salen in liquid or supercritical $CO_2$. This behavior may be attributed to Lewis acid-base interaction between salen and $CO_2$. The chelation of salen with $Co^{++}$ ion in supercritical condition was confirmed to be fast enough above room temperature. However, the metal ion extraction capability of t-butyl salen is relatively poor because of its low solubility and ionic nature of complex.
Keywords
Solubility; Salen; Supercritical $CO_2$; Fiber optics;
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