Something really interesting: Fluorescence thermochromism of copper(I)-iodide–pyridine complex.

Pyridine with copper(I)-iodide forms an off-white complex what is highly fluorescent. The off white powder glows yellow under UV light at room temperature, but when it is cooled with liquid nitrogen the color of emission changes from yellow to orange, then to pink and at the end it glows with an intense blue/purple color when the complex reaches -195.79 °C.

The complex has a tetrahedral tetrameric structure with a Cu 4 I 4 cube in it’s middle and 4 pyridine ring surrounds this little cage.

9:30 pm • 14 December 2014 • 1,760 notes • View comments