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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 25, Number 4
BKCSDE 25(4)
April 20, 2004 

 
Title
Solubilities of Salen Derivatives and Their Cobalt Complex in Liquid and Supercritical CO2
Author
Seunghyun Koh, Byungwan Jeon, Hakwon Kim, Kwangheon Park, Hongdoo Kim*
Keywords
Solubility, Salen, Supercritical CO2, Fiber optics
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 CO2. This behavior may be attributed to Lewis acid-base interaction between salen and CO2. 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.
Page
471 - 474
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