CONTROL METHOD FOR ACID BASICITY OF SOLUTION BY LIGHT IRRADIATION

摘要

PURPOSE:To make it possible to adjust the pH of a solution finely by revercibly changing the pH in an easy method, by irradiating with light the solution of a high molecular compound which has an acid radical while including in the main chain azobenzene or the like permitted by a light beam to react for trans-cis isomerization. CONSTITUTION:Azobenzene or the like such as p-diazobenzene permitted by visible and ultraviolet rays to react for trans-cis isomerization should be contained in a main chain and an acid radical is possessed by a high molecular compound to be contained in a solution. Then, this solution is irradiated with light to change the acid basicity of the solution.