Reversible Phase Transfer of (CdSe/ZnS) Quantum Dots between Organic and Aqueous Solutions

被引：113

作者：

Dorokhin, Denis ^{[1
,2
]}

Tomczak, Nikodem ^{[1
,3
]}

Han, Mingyong ^{[3
,4
]}

Reinhoudt, David N. ^{[1
,2
]}

Velders, Aldrik H. ^{[1
,2
]}

Vancso, G. Julius ^{[1
]}

机构：

[1] Univ Twente, Fac Sci & Technol, NL-7500 AE Enschede, Netherlands

[2] Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands

[3] ASTAR, Inst Mat Res & Engn, Singapore 117602, Singapore

[4] Natl Univ Singapore, Div Bioengn, Singapore 117576, Singapore

来源：

ACS NANO | 2009年 / 3卷 / 03期

关键词：

quantum dots; CdSe/ZnS; ferrocene; cyclodextrin; host-guest complexes; solution phase transfer; luminescence quenching; SILICA NANOPARTICLES; LIVE CELLS; NANOCRYSTALS; WATER; THERMODYNAMICS; COMPLEXATION; RECOGNITION; DENDRIMERS; FERROCENE; H-1-NMR;

D O I：

10.1021/nn8006515

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Ttrioctylphosphine oxide (TOPO) stabilized CdSe/ZnS quantum dots (QD) were modified with 6-ferrocenyl-1-hexanethiol (FcHT) or 11-ferrocenyl-1-undecanethiol (FcUT) via ligand exchange. The presence of ferrocenyl thiol ligands on the surface of the QDs was proven by diffusion ordered NMR spectroscopy. Upon replacement of the initial TOPO ligand with ferrocene derivatives the emission of the QDs decreased. Phase transfer of ferrocene-modified QDs from organic solvents into water was achieved by complexation reactions with beta-cyclodextrin (beta-CD). The QDs coated with ferrocene thiols are soluble in nonpolar solvents and are transferred into the aqueous phase upon formation of host-guest complexes between the ferrocene units and the cavity of P-CD. The reversibility of the phase transfer was probed by the addition of naphthalene and adamantane derivatives to the aqueous phase containing QD-[Fc-CD] adduct.

引用

页码：661 / 667

页数：7

共 56 条

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