Anion-conducting polymer, composition, and membrane
View Patent ↗Anion-conducing polymers and membranes with enhanced stability to aqueous alkali include a polymer backbone with attached sulfonium, phosphazenium, phosphazene, and guanidinium residues. Compositions also with enhanced stability to aqueous alkali include a support embedded with sulfonium, phosphazenium, and guanidinium salts.
1. A polymeric reaction product of a first monomer of the formula
with at least one second monomer having of the formula
wherein D is halide selected from F, Cl, Br, and I;
wherein E is selected from —SO 2 —, —C(═O)—, and —P(═O)(aryl)-;
wherein Z is a direct bond or —C(CX 3 ) 2 — where X is hydrogen or fluorine;
wherein R 1 and R 2 independently of one another denote H, an alkyl, cycloalkyl, alkenyl, aryl, or aralkyl group having 1 to 10 carbon atoms or a heterocyclic group having 4 to 20 carbon atoms;
wherein R 1 and R 2 may together form a —(CH 2 ) 2 —, —(CH 2 ) 3 —, —(CH 2 ) 4 —, —(CH 2 ) 5 —, —CH═CH—, or —CH═CH—CH═CH—;
wherein A 1 , A 2 , A 3 , and A 4 are independently selected from hydrogen, alkyl, cycloalkyl, alkenyl, aryl, aralkyl having 1 to 10 carbon atoms, a heterocyclic group having 4 to 20 carbon atoms, and a residue of the formula
wherein R 3 is a direct bond or a group selected from —(CH 2 CH 2 )—, —(C 6 H 4 )—, —(CF 2 CF 2 )—, —(CH 2 CH 2 CH 2 )—; wherein R 4 and R 5 independently of one another denote an alkyl, cycloalkyl, alkenyl, aryl, or aralkyl group having 1 to 10 carbon atoms or a heterocyclic group having 4 to 20 carbon atoms; wherein R 4 and R 5 may together form a —(CH 2 ) 2 —, —(CH 2 ) 3 —, —(CH 2 ) 4 —, —(CH 2 ) 5 —, —CH═CH—,
or —CH═CH—CH═CH—; wherein R 6 is selected from H, alkyl, cycloalkyl; and wherein Q is any anion; and with the caveat that the polymeric reaction product is prepared from first monomer and/or second monomer having at least 5 mole percent of the residue.
2. A membrane comprising a polymeric reaction product of the reaction of a monomer of the formula
with one at least one second monomer of the formula
wherein D is halide selected from F, Cl, Br, and I;
wherein E is selected from —SO 2 —, —C(═O)—, and —P(═O)(aryl)-;
wherein Z is a direct bond or —C(CX 3 ) 2 — where X is hydrogen or fluorine;
wherein R 1 and R 2 independently of one another denote H, an alkyl, cycloalkyl, alkenyl, aryl, or aralkyl group having 1 to 10 carbon atoms or a heterocyclic group having 4 to 20 carbon atoms;
wherein R 1 and R 2 may together form a —(CH 2 ) 2 —, —(CH 2 ) 3 —, —(CH 2 ) 4 —, —(CH 2 ) 5 —, —CH═CH—, or —CH═CH—CH═CH—;
wherein A 1 , A 2 , A 3 , and A 4 are independently selected from hydrogen, alkyl, cycloalkyl, alkenyl, aryl, aralkyl having 1 to 10 carbon atoms, a heterocyclic group having 4 to 20 carbon atoms, and a residue of the formula
wherein R 3 is a direct bond or a group selected from —(CH 2 CH 2 )—, —(C 6 H 4 )—, —(CF 2 CF 2 )—, —(CH 2 CH 2 CH 2 )—; wherein R 4 and R 5 independently of one another denote an alkyl, cycloalkyl, alkenyl, aryl, or aralkyl group having 1 to 10 carbon atoms or a heterocyclic group having 4 to 20 carbon atoms; wherein R 4 and R 5 may together form a —(OH 2 ) 2 —, —(CH 2 ) 3 —, —(CH 2 ) 4 —, —(CH 2 ) 5 —, —CH═CH—,
or —CH═CH—CH═CH—; wherein R 6 is selected from H, alkyl, cycloalkyl; wherein Q is any anion; and with the caveat that the polymeric reaction product is prepared from first monomer and/or second monomer having at least 5 mole percent of the residue.
3. The polymer of claim 1 , wherein Q is an anion selected from the group consisting of hydroxide, carbonate, bicarbonate, and halide.