Ion sensor containing a selective organic membrane

Abstract

Abstract An ion sensor is disclosed, together with the relevant process for preparing it, which contains a polymeric organic matrix, a ionophore, a device based on semiconductors of EMOS or ISFET (CHEMFET) type containing at its surface silicon oxide adhering to said polymeric organic matrix by means of a polysiloxanic matrix, characterized in that the polysiloxanic matrix is selected from the organosilanes of general formula ##STR1## wherein: R II , R III , R IV , which may be either equal to, or different from, one another, are alkyl or alkoxy groups containing from 1 to 10 carbon atoms, R I is equal to (CH 2 ) p X (CH 2 ) q wherein: X is CH 2 , or an either mono- or polycondensed aromatic group, or NH or O, p and g, which may be either equal to, or different from, one another, are integers which can have values comprised within the range of from 0 to 10, with value 0 being excluded when X is either NH or O, Y is --NH 2 or --OH or --SH, and that the polymeric organic matrix is based on a polymer obtained by reacting a polymerized olefin, whose monomer has the formula: ##STR2## wherein: Z I is equal to ##STR3## or to (CH 2 ) r , wherein r is an integer which can have a value comprised within the range of from 1 to 10, R V can be either H or CH 3 , with the CH 3 value being excluded when Z I is equal to (CH 2 ) r , and a compound, obtained by means of the reaction between 2,4-toluene-diisocyanate with a di-alcohol or a di-amine or a glycol or a tri-alcohol or a tri-amine, having the following formula: ##STR4## wherein: R VI is equal to (CH 2 CH 2 O) m CH 2 CH 2 , wherein m is an integer which can have values comprised within the range of from 1 to 20,000, or is equal to (CH 2 ) s , wherein s is an integer which can have values comprised within the range of from 1 to 20, or is equal to ##STR5## wherein t is an integer which can have values comprised within the range of from 1 to 10, and Z can be either --NH-- or O, with the --NH-- value being excluded when R VI =(CH 2 CH 2 O) m CH 2 CH 2 .

Inventors

• 👤 Massimo Battilotti
• 👤 Matteo Giongo

Bibliographic Details