TY - JOUR
T1 - Supramolecular end-group separation of linear polymers with different terminals through host-guest interaction
AU - Xue, Jie
AU - Zhou, Li
AU - He, Peng
AU - Zhu, Xinyuan
AU - Yan, Deyue
AU - Jiang, Xulin
PY - 2008/6/1
Y1 - 2008/6/1
N2 - By increasing the hydrophobicity of end group, the complexation rate between α-cyclodextrin (α-CD) and poly(ethylene glycol) (PEG) derivative speeds up greatly. Based on such a huge difference of complexation kinetics, the PEG derivative with palmityloxy terminal (PEG-C16) can be successfully separated from a carboxylic acid end-functionalized analogue (PEG-COOH) by once supramolecular purification. Adding α-CD into the aqueous solution of PEG-C16/PEG-COOH mixture, PEG-C16 is encapsulated into α-CD cavity to form the crystalline inclusion complex in a very short time, while almost all of PEG-COOH molecules are still reserved in the aqueous solution. After dichloromethane extraction, the pure PEG-C16 is obtained. Moreover, the host CD can be recycled. Thus, it is an efficient green way to separate and purify the linear polymers with different terminal functionality. © 2007 Springer Science+Business Media B.V.
AB - By increasing the hydrophobicity of end group, the complexation rate between α-cyclodextrin (α-CD) and poly(ethylene glycol) (PEG) derivative speeds up greatly. Based on such a huge difference of complexation kinetics, the PEG derivative with palmityloxy terminal (PEG-C16) can be successfully separated from a carboxylic acid end-functionalized analogue (PEG-COOH) by once supramolecular purification. Adding α-CD into the aqueous solution of PEG-C16/PEG-COOH mixture, PEG-C16 is encapsulated into α-CD cavity to form the crystalline inclusion complex in a very short time, while almost all of PEG-COOH molecules are still reserved in the aqueous solution. After dichloromethane extraction, the pure PEG-C16 is obtained. Moreover, the host CD can be recycled. Thus, it is an efficient green way to separate and purify the linear polymers with different terminal functionality. © 2007 Springer Science+Business Media B.V.
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U2 - 10.1007/s10847-007-9397-x
DO - 10.1007/s10847-007-9397-x
M3 - Article
SN - 0923-0750
VL - 61
SP - 83
EP - 88
JO - Journal of Inclusion Phenomena and Macrocyclic Chemistry
JF - Journal of Inclusion Phenomena and Macrocyclic Chemistry
IS - 1-2
ER -