BLUE MOON

BLUE MOON

BLUE MOON

Suli Ayad, an undergraduate working in Kenneth Hanson’s lab at Florida State University, synthesized these crystals of 7-bromo-2-naphthol in a round-bottom flask. Under ultraviolet light, the crystals glow bright blue because when 7-bromo-2-naphthol molecules absorb the energy in UV light, they get excited. The molecules then release that energy as blue light to return to their lower-energy ground state. But Hanson’s group is interested in the chemical’s excited state for another reason: In the excited state, the molecule is more than 10 billion times as acidic as it is in the ground state. This is due to a shift in electron density away from 7-bromo-2-naphthol’s OH group. The switchable increase in acidity makes the molecule a useful catalyst in organic chemistry.

Submitted by Jamie Wang and Kenneth Hanson. Do science. Take photos Get money. Enter our monthly photo contest here for your chance to win $50!

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