We will carry out the following researches 1) Various photo-controlled biodegradable polymers will be developed based on the control of multiple heterocycles such as pyrrolidone, imide, imidazole, oxazole, thiazole rings, etc. 2) Controlled bioconjugation of natural polymers can be developed to realize functional natural materials. 3) Ultra-stable lightweight soft-materials having heat resistance comparable to metals based on pai-conjugation controlled design for thermal stabilization method.