Dr Thomas de Prinse undertakes the third step of his large-scale cubane synthesis, the bromination of the ethylene ketal of cyclopentanone to its tribromocyclopentanone derivative.

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Dr Thomas de Prinse makes yttrium oxide doped with erbium and ytterbium.

Upconversion: Material absorbs two infrared photons, emits one visible photon.

Dr Thomas de Prinse undertakes the first two steps of his large-scale cubane synthesis in his shed.

Dr Thomas de Prinse announces his intentions to repeat his cubane synthesis on a larger scale.