Question #97b7c

1 Answer
Mar 22, 2015

The strongest fluorescence emission line of ethanol occurs at a wavelength of
330 nm.

Fluorescence is the emission of light by a substance that has absorbed light.

The emitted light usually has a longer wavelength than the absorbed radiation.

In ethanol, the easiest electrons to excite are the nonbonding electrons on the O atom.

They undergo an n → σ* transition at about 185 nm.

When aqueous ethanol is excited, it shows four fluorescence lines in the range
280 – 350 mm.

The strongest emission is at 330 nm.