Here is another thermofluorescent compound what I prepared recently. It’s interesting to see that at room temperature it is an off-white powder without visible fluorescence, but when it is cooled down with liquid nitrogen under UV light it first emits a bright green (1.-st gif), than a bright blue color (2.-nd gif).

According to measurements the green fluorescence of this compound develops at -50 °C and the blue color is emitted under -140 °C.

Science is simply adorable.

9:30 pm • 21 February 2015 • 551 notes • View comments