Abstract: The invention relates to novel pyrrole derivatives of the formula (I) which make it possible to immobilize and address oligonucleotides by electropolymerization. Said invention also relates to thus produced electroactive polymers and to methods for using them for detecting, identifying and dosing analytes in a sample. (I) wherein R1 is one type of oligonucleotide, Y is S or O, X is a spacer arm selected from —(CH2)—O—, —(CH2)<SB>P</SB>O—[(CH2)2—O]q—, —(CH2)r; —CO—NR?—(CH2)r—O—, —CH2r—NCH3—(CH2)r—O—, —CH2)rCO—NR?—[CH2)2—O]s—, —(CH2)rNCH3[(CH2)2—O]<SB>S</SB>—, R? is H or CH3, n is an integer number ranging from 1 to 5, p is an integer number ranging from 1 to 2, q is an integer number ranging from 1 to 4, r is an integer number ranging from 1 to 3, r? is an integer number ranging from 1 to 3, s is an integer number ranging from 1 to 3, n, p, q, r, r? and s are identical or different, a pyrrole cycle is substituted in a position 2, 3, 4 or 5.

Abstract: The invention relates to novel pyrrole derivatives of the formula (I) which make it possible to immobilize and address oligonucleotides by electropolymerization. Said invention also relates to thus produced electroactive polymers and to methods for using them for detecting, identifying and dosing analytes in a sampe. (I) wherein R1 is one type of oligonucleotide, Y is S or O, X is a spacer arm selected from —(CH2)—O—, —(CH2)<SB>P</SB>O—[(CH2)2—O]q—, —(CH2)r; —CO—NR—(CH2)r-0-, —CH2r—NCH3—(CH2)r—O—, —CH2)rCO—NR?—[CH2)2—O]s—, —(CH2)rNCH3[(CH2)2—O]<SB>S</SB>—, R? is H or CH3, n is an integer number ranging from 1 to 5, p is an integer number ranging from 1 to 2, q is an integer number ranging from 1 to 4, r is an integer number ranging from 1 to 3, r? is an integer number ranging from 1 to 3, s is an integer number ranging from 1 to 3, n, p, q, r, r? and s are identical or different, a pyrrole cycle is substituted in a position 2, 3, 4 or 5.

Abstract: The invention relates to a cathode based on a transition metal (M) for reduction of carbon dioxide into formate in a hydro-organic or purely aqueous medium, particularly for air decarbonation applications for industry and in general for atmospheric pollution control and regeneration of breathable air in a confined or unconfined environment, characterized by including a transition metal molecular complex formed of:a bidentate ligand functional by identical or different electroattractive groups A and A', the ligand comprising a basic molecular group allowing the reduction redox potential of the complex to be reduced in a range of -1.40 to +0.80 V relative to an Ag/Ag.sup.+ reference electrode, at least one of the groups A or A' being electropolymerizable;two identical or different labile groups Y and Y' with trans stereochemistry taken from the following series: halide anion (Cl.sup.-, Br.sup.-, I.sup.-), acetate anion (CH.sub.3 COO.sup.