Compounds of the trivalent lanthanide ions that display a metal-centred luminescence may serve as luminescent tags. The emission from the excited state lanthanide ions is characterized by narrow emission bands in the NIR to UV range and long emission lifetimes, up to milliseconds, characteristic of the individual lanthanide ion. A major obstacle to achieving efficient lanthanide emission is the low molar absorption coefficients of the f�f transitions. This could potentially be overcome by incorporating the lanthanide ions in CdSe quantum dots (QDs). The CDs having high absorption coefficients could sensitize lanthanide emission through the antenna effect. In this regard the QDs are convenient due to the ease of preparation of high-quality samples and the tunability of their size and thereby optical properties. The synthesis and photophysical properties of the lanthanide-modified CDs will be presented.

Photophysical properties of lanthanide-modified CdSe quantum dots

245th National Meeting (2013)

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