['Several', 'works', 'are', 'dedicated', 'to', 'the', 'synthesis', 'of', 'ROMP', '-', 'able', 'optical', 'sensor', 'molecules', 'such', 'as', 'phenantroimidazoles', '[', '35,36', ']', ',', 'europium', 'complexes', '[', '37', ']', 'or', 'xanthene', 'dyes', '[', '38', ']', ',', 'their', 'random', 'copolymerization', 'and', 'the', 'evaluation', 'of', 'their', 'sensing', 'profiles', 'in', 'the', 'copolymers', '.']