Abstract:
Provided are an o-phenylenediamine-based polymer compound which can be used as a recognition material to an anion and is high in the selectivity to a fluoride ion, its preparation method, and a resin composition for a chemical sensor containing the compound. The o-phenylenediamine-based polymer compound is represented by the formula 1, wherein R1 is a linear or branched C1-C20 alkyl group substituted or unsubstituted with a halogen atom or a linear or branched C1-C20 alkoxy group substituted or unsubstituted with a halogen atom; and R2 is a linear or branched C1-C20 alkyl group substituted or unsubstituted with a halogen atom or a linear or branched C1-C20 alkoxy group substituted or unsubstituted with a halogen atom. Preferably, the polymer compound has a number average molecular weight of 3,000-100,000.