Osmotic pressure control in response to a specific ion signal at physiological temperature using a molecular recognition ion gating membrane.
A molecular recognition gating ion membrane was prepared by graft copolymerization of N-isopropylacrylamide and benzo[18]crown-6-acrylamide onto the pore surface of porous polyethylene film. This membrane captured Ba2+ with its crown ether receptors and generated osmotic pressure in response to Ba2+ autonomously and reversibly. However, the membrane never generated osmotic pressure in response to Ca2+. In addition, the concentration gradient of both the ion and other solute such as dextran could be used as the driving force; using a dextran concentration gradient, we can control the critical concentration and the duration time of the osmosis response.
Ito
Taichi
T
Department of Chemical System Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku 113-8656, Japan.
Yamaguchi
Takeo
T
D001464:Barium / Q000737:chemistry; D003911:Dextrans; D015640:Ion Channel Gating / Q000502:physiology*; D008567:Membranes, Artificial; D009997:Osmotic Pressure; D016062:Porosity; D012996:Solutions; D013696:Temperature
D003911:Dextrans; D008567:Membranes, Artificial; D012996:Solutions; D001464:Barium