Abstract: “Luminescent sea” refers to the magical scene of blue light on the surface sea water at night or in a dark environment, also known as “blue tears”. This popular science experiment aims to guide people to gain an understanding of the world, and reveals the principles hidden behind natural phenomena and active experimentation. According to the principle of chemiluminescence energy transfer, the smart release material polysaccharide hydrogel entrapped with material was used to prepare sustainable luminescent hydrogel spheres. And a portable science popularization experiment box has been launched, which can reproduce your own surging “blue tears” anytime and anywhere. With the ability to interpret natural phenomena and promote applied research, this popular science experiment connects the knowledge of sugar chemistry, photochemistry and material chemistry, fully showing the romantic and wonderful chemical science to the public.

Key words: Luminescent sea, Seaweed polysaccharide, Ionic exchange, Sustainable luminescence