Phosphor with their own hands.

To produce the phosphor, we need coniferous concentrate and boric acid.

We need to buy in the pharmacy not "coniferous extract", namely "coniferous concentrate", because there is a bright yellow dye tartrazine (E102). The upper pair of blue balls in its molecule is chromophore (capable of receiving and emitting light) the -N = N- group of two nitrogen atoms connected by a double bond. This ability is due to the fact that the -N = N- fragment can be in two positions and the energy of the transition between them is absorbed / released as light.

In addition, this group is connected on the one hand with a benzene ring of six carbon atoms, and on the other hand - with a nitrogen-carbon and another benzene ring. This chain is a kind of corridor in which electrons can "run". The permissible energies of such a run determine the color of the radiation.

Despite the fact that we understand how the dye molecule works, it is not yet clear how it forms a phosphor-molecular photo-accumulator with boric acid. Do it yourself and experiment.

Pour (or pour if you bought a liquid) in a glass of coniferous concentrate.

Pour a little water - to get an aqueous solution of tartrazine.

Pour boric acid into the spoon

We moisten with a solution of the dye

Stirring to wet all acid

We boil to such a state. Formed bubbles pierce something sharp to ensure a good warm-up of the whole mixture.

Cool it, add more dye solution and boil the melt again. A homogeneous yellow substance will be obtained.

This is a phosphor! Act on it with a flash:

You can pound it into powder and apply it somewhere, add it to other substances and even into water.

From the melting of boric acid with solutions of other dyes - rhodamine and paste from blue gel pens too, turned out a phosphor, but much worse quality. A major drawback of this method of preparing a phosphor is the very short duration of the luminescence.

We draw your attention to the fact that the production of the phosphor is still inconvenient at home, especially in a huge amount. You can order a quality phosphor on the contact data below.