So-called magic-size semiconductor nanoclusters are analogous to the carbon fullerenes in that they are stable at only certain, discrete sizes such as (CdSe)13, (CdSe)19, (CdSe)33, and (CdSe)34.  They have been observed as intermediates in nanocrystal synthesis for the past 30 years.  Their precise identities were first established by mass-spectral characterization by Kasuya and coworkers in 2004.  Until recently, magic-size nanoclusters have been obtained only as mixtures of the various discrete sizes.  We have now isolated (CdSe)13 as a variety of primary-amine derivatives such as [(CdSe)13(n-octylamine)13].  We have also isolated the larger-size [(CdSe)34(n-octylamine)16(di-n-pentylamine)2], and have found these discretely sized nanoclusters to be potent nanocrystal precursors.  The mechanisms of synthesis, spectroscopic properties, and reactivity of these CdSe nanoclusters will be presented.

Isolation of the magic-size nanoclusters (CdSe)<sub>13</sub> and (CdSe)<sub>34</sub> as amine derivatives

247th National Meeting (2014)

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Isolation of the magic-size nanoclusters (CdSe)13 and (CdSe)34 as amine derivatives

Isolation of the magic-size nanoclusters (CdSe)₁₃ and (CdSe)₃₄ as amine derivatives