NDLI: Ligand-exchange of TOPO-capped CdSe quantum dots with quinuclidines

Content Provider	IEEE Xplore Digital Library
Author	Obliosca, J.M. Fan-Gang Tseng Ching-Mao Huang Leu-Wei Lo Pen-Cheng Wang
Copyright Year	2012
Description	Author affiliation: Division of Medical Engineering Research, National Health Research Institutes, Zhunan 35053, Taiwan (Ching-Mao Huang; Leu-Wei Lo) \|\| Department of Engineering and System Science, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan (Obliosca, J.M.; Fan-Gang Tseng; Pen-Cheng Wang)
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 $^{31}P-NMR$ spectra was observed indicating efficient fast ligand exchange.
Starting Page	343
Ending Page	346
File Size	585315
Page Count	4
File Format	PDF
ISBN	9781467311229
e-ISBN	9781467311243
DOI	10.1109/NEMS.2012.6196789
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-03-05
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Nuclear magnetic resonance Spectroscopy Heating Nanoelectromechanical systems Multiplexing Electronic mail Microscopy 31PNMR spectroscopy ligand-exchange CdSe quantum dots quinuclidines tertiary amines
Content Type	Text
Resource Type	Article

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