Sulfonated aromatic compound, polyketone with sulfonated aromatic groups and methods for preparing sulfonated aromatic compound and polyketone with sulfonated aromatic groups

The invention provides a sulfonated aromatic compound and a polyketone with sulfonated aromatic groups, wherein the polyketone is obtained by polymerization by taking the sulfonated aromatic compound as a monomer. The content of the sulfonated aromatic groups on the polyketone is controllable, and the polymer with sulfonated aromatic groups can be used for preparing a proton exchange membrane with high electric conductivity, good mechanical properties and low cost. The invention also provides methods for preparing the sulfonated aromatic compound and the polyketone with sulfonated aromatic groups. In addition, the invention further provides the proton exchange membrane.