Greetings fellow nerds. In a previous video I showed you how to make various colored glow sticks by using various dyes. Now I mentioned that Rhodamine B had the problem of decaying too soon. But we’re going to exploit that and make a color changing glow stick. Once again we start with the solvent diethyl phthalate. Now the base dye we’re going to use is 9,10-bis(phenylethynyl)anthracene to give us a green glow. This dye is stable and will be the final color of the glow stick. There we go, all mixed in. Now we add Rhodamine B. We’re adding in a little extra Rhodamine B so that it completely masks the 9,10-bis(phenylethynyl)anthracene. Just like in our previous video, we’re adding in TCPO to power the glow stick, and sodium acetate to raise the pH. Okay we’re ready. Now we add the hydrogen peroxide to initiate the reaction. And there it goes. Let me give it a shake. Now that’s a red glow stick. But over the course of just ten minutes, the Rhodamine B will decay and unmask the green 9,10-bis(phenylethynyl)anthracene. Obviously if I used blue 9,10-diphenylanthracene I would get a blue glow stick as my final color. And there it is, we went from a red glow stick to a green one. Thanks for watching, please subscribe, rate and comment.