Dual-color Multiresponsive Rhodamine Derivative and its Photochromic Enhancement Behavior in Polyurethane

Abstract

Abstract. In this study, a rhodamine derivative (RH-PY) with dual color (blue green to orange) and multiple response (light, acid gas, and force) was synthesized. The photochromic enhancement behavior of rhodamine derivative in polyurethane matrix was explored. By complexing polyurethane with RH-PY, the open-form lifetime of RH-PY can extend from 3 days to more than one month. To the best of our knowledge, this is the longest open-form lifetime of rhodamine derivatives reported so far. Rhodamine with long open-form lifetime has great potential in developing outstanding photochromic materials. This method is simple and inexpensive, and non-covalent preparation suits for more rhodamine derivatives.