Sachio Fukuoka, T. Kida, Y. Nakajima
Feb 27, 2010
Citations
0
Influential Citations
22
Citations
Journal
Tetrahedron
Abstract
Abstract N , N , N ′, N ′-(Tetrakis-2-pyridylmethyl)ethylenediamine (TPEN) derivatives bearing the different number (1–4) of a double bond moiety on the pyridine ring are synthesized and subjected to copolymerization with N -isopropylacrylamide in the presence of AIBN. The obtained poly(TPEN-NIPA) gels show thermo-responsive swelling/shrinking behaviors and are employed for the extraction of cadmium(II) ion from the aqueous solution to examine the relationship of the gel characteristics and the extraction performance. The polymer gels composed of the TPEN derivative bearing three or four double bonds exhibit temperature-dependent change of swelling and shrinking in water. These gels extract Cd II ion efficiently from the aqueous solution in the swelling state at 5 °C, while little extraction was observed at 45 °C with shrinking.