國家衛生研究院 NHRI:Item 3990099045/6532

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Title:	Ligand-exchange of TOPO-capped CdSe quantum dots with quinuclidines
Authors:	Obliosca, JM;Tseng, FG;Huang, CM;Lo, LW;Wang, PC
Contributors:	Division of Medical Engineering Research
Abstract:	A series of tertiary amine quinuclidine-capped cadmium selenide (Q-CdSe) quantum dots (QDs) of ~4 nm in diameter was successfully synthesized via ligand exchange process in which the original hydrophobic trioctylphosphine oxide (TOPO) ligand bound to QDs was replaced with stronger quinuclidine derivatives, quinuclidine (Q1), 3-quinuclidinone (Q2) and 3-quinuclidinol (Q3). The ligand exchange of TOPO by Q probed using the combined fluorescence and absorption spectroscopy was achieved in just only a few minutes. Moreover, disappearance of prominent C-H aliphatic stretching (~2900 cm-1) and phosphate signal (35 ppm) of TOPO-capped CdSe after replacement with Q as revealed in FT-IR and solid state 31P-NMR spectra was observed indicating efficient fast ligand exchange.
Date:	2012-05
Relation:	7th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS), 2012. 2012 May:343-346.
Link to:	http://dx.doi.org/10.1109/NEMS.2012.6196789
Cited Times(Scopus):	http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84861541016
Appears in Collections:	[Leu-Wei Lo] Conference Papers/Meeting Abstract

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