SENSORE PER IONI CONTENENTE UNA MEMBRANA ORGANICA SELETTIVA

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 wherein: R, R, R, which may be either equal to, or different from, one another, are alkyl or alkoxy groups containing from 1 to 10 carbon atoms, R is equal to (CH2)p X (CH2)q wherein: X is CH2, or an either mono- or poly-condensed 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 -NH2 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: wherein: Z is equal to CH2CH2O @ or to (CH2)r, wherein r is an integer which can have a value comprised within the range of from 1 to 10, R can be either H or CH3, with the CH3 value being excluded when Z is equal to (CH2)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: wherein: R is equal to (CH2CH2O)mCH2CH2, wherein m is an integer which can have values comprised within the range of from 1 to 20,000, or is equal to (CH2)s, wherein s is an integer which can have values comprised within the range of from 1 to 20, or is equal to 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 = (CH2CH2O)mCH2CH2.