This compound also shows semiconducting properties.
The absorbance of light by an organic compound is based on electrons moving between regions around atoms known as orbitals. In this work, the researchers show a methodical approach to constructing molecules having orbitals that allow some ranges of light to be absorbed but not others. "A somewhat similar molecule absorbing near-infrared radiation was reported some time ago," explains Yutaka Ie, senior author,"but this compound also absorbed visible light and so appeared blue. Our goal was to find a molecule that showed no color at all, to allow specific applications. A combination of an extended polyene structure and orbital symmetry were key."
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