Size and shape controlled ZnTe nanocrystals with quantum confinement effect

Jun, Young‐wook; Choi, Chang‐Shik; Cheon, Jinwoo

doi:10.1039/b008376n

Cited by 111 publications

(86 citation statements)

References 34 publications

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“…[17] The tetramethylethylenediamine ligands coordinate in a bidentate manner to the zinc center, as demonstrated by the molecular structure presented in Figure 4. In the solid-state structure of complex 9 the ferrocenyl groups are directed away from one another to minimize steric repulsion between them.…”

Section: Resultsmentioning

confidence: 96%

Ferrocene‐Based Trimethylsilyl Chalcogenide Reagents for the Assembly of Functionalized Metal–Chalcogen Architectures

MacDonald

Eichhöfer

Campana

et al. 2011

Chemistry A European J

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The ferrocene-based trimethylsilyl chalcogenide reagents [FcC(O)OCH(2)CH(2)ESiMe(3)] (2, E=S, 3 E=Se, Fc=[Fe(η(5)-C(5)H(5))(η(5)-C(5)H(4))]) and [FcC(O)NHCH(2)CH(2) SSiMe(3)] (8b) have been synthesized. The reagents were reacted with solubilized transition-metal acetates to yield functionalized complexes and clusters, including the spherical nanocluster [Ag(14)S{SCH(2)CH(2)O(O)CFc)}(12)(PPh(3))(6)] (11, PPh(3) =triphenylphosphine). The complexes were characterized by NMR spectroscopy and X-ray crystallography. The electrochemical behavior of the complexes was explored by cyclic voltammetry and each displayed a single quasi-reversible redox wave with some adsorption to the electrode surface.

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Section: Resultsmentioning

confidence: 96%

Ferrocene‐Based Trimethylsilyl Chalcogenide Reagents for the Assembly of Functionalized Metal–Chalcogen Architectures

MacDonald

Eichhöfer

Campana

et al. 2011

Chemistry A European J

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“…[1,13,14] Far less attention has been directed at the synthesis of ternary II-II'-VI nanoparticles. In these alloyed compounds, the Abstract: The ternary molecular nanoclusters [Zn x Cd 10Àx Se 4 (SePh) 12 (PnPr 3 ) 4 ] (x = 1.8, 1 a; x = 2.6, 1 b) were employed as single-source precursors for the synthesis of high-quality hexagonal Zn 4 ] (x = 1.8, 2 a; x = 2.6, 2 b) are equally convenient precursors for the synthesis cubic Zn x Cd 1Àx E nanoparticles. The thermolysis of the cluster molecules in hexadecylamine provides an efficient system in which the inherent metal-ion stoichiometry of the clusters is retained in the nanocrystalline products, whilst also affording control of particle size within the 2-5 nm range.…”

Section: Introductionmentioning

confidence: 99%

“…The concept of pyrolytic degradation of organometallic precursors that forms the basis of the TOP/TOPO method has been complemented by numerous studies involving the use of single-source precursors in the synthesis of semiconductor nanoparticles. [2][3][4] This approach involves the pyrolysis of complexes with a preformed metal-nonmetal bond, tendering the potential advantages of low-temperature synthetic routes, the avoidance of toxic and volatile precursors, and low incorporation of impurities. [5,6] An expansion of this precursor approach involves the use of cluster complexes as single-source precursors to nanoparticle formation.…”

Section: Introductionmentioning

confidence: 99%

Control of Metal‐Ion Composition in the Synthesis of Ternary II‐II′‐VI Nanoparticles by Using a Mixed‐Metal Cluster Precursor Approach

DeGroot

Rösner²,

Corrigan

2006

Chemistry A European J

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The ternary molecular nanoclusters [Zn(x)Cd(10-x)Se4(SePh)12(PnPr3)4] (x = 1.8, 1 a; x = 2.6, 1 b) were employed as single-source precursors for the synthesis of high-quality hexagonal Zn(x)Cd(1-x)Se nanocrystals. The tellurium clusters [Zn(x)Cd(10-x)Te4(TePh)12(PnPr3)4] (x = 1.8, 2 a; x = 2.6, 2 b) are equally convenient precursors for the synthesis cubic Zn(x)Cd(1-x)E nanoparticles. The thermolysis of the cluster molecules in hexadecylamine provides an efficient system in which the inherent metal-ion stoichiometry of the clusters is retained in the nanocrystalline products, whilst also affording control of particle size within the 2-5 nm range. In all cases, the nanoparticles are monodisperse, and luminescence spectra exhibit emission energies close to the absorption edge. Analysis of the optical spectra and X-ray diffraction patterns of these materials indicates a metal-ion concentration gradient within the structures of the nanocrystals, with Zn(II) ions predominantly located near the surface of the particles.

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“…The zinc center has a distorted tetrahedral geometry with a large Te1-Zn1-Te2 angle (129.21 (3)8) compensated by a compression of the N1-Zn-N2 angle (85.12(13)8), as observed in related zinc tellurolate complexes with N-donor ligands. [7,8] Complex 2 is infinitely stable in the solid state if maintained at low temperatures (À80 8C) and is thus a convenient, storable precursor. Consistent with the demonstrated reactivity of reagents such as E(SiMe 3 ) 2 and RESiMe 3 (E = S, Se, Te) in binary cluster synthesis, [9] MESiMe 3 complexes are powerful precursors for the formation of M-E-M' nanoclusters [1,2] owing to their preformed MÀE bonds and the reactive pendant trimethylsilyl groups.…”

mentioning

confidence: 99%

Imine‐Stabilized Zinc Trimethylsilylchalcogenolates: Powerful Reagents for the Synthesis of II‐II′‐VI Nanocluster Materials

DeGroot

Corrigan

2004

Angew Chem Int Ed

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A new class of metal-chalcogen complexes is being pursued in which the presence of reactive silyl functional groups offers an entry into high nuclearity ternary cluster and (nanometer sized) nanocluster materials. Both [E(SiMe 3 )]À (E = S, Se, Te) [1, 2] and [S(SiMe 2 S) 2 ] 2À [3,4] groups can be used, provided their coordination to metal centers can be stabilized by additional ancillary ligands. Metal-chalcogenolate reagents for the controlled incorporation of the heavier congeners selenium and tellurium are particularly difficult to prepare owing to the inherent reactivity of these chalcogen elements. These are desirable targets however because of the demonstrated composition-dependant photophysical properties of metal-chalcogenide semiconductor nanomaterials. This property is highlighted by the recent synthesis of a series highly luminescent Zn x Cd 1Àx Se nanocrystals whose optical properties can be tuned across the visible spectrum by changing the Zn:Cd ratio.[5] The development of reagents for controlled access to mixed-metal ternary clusters and nanoclusters is of importance in elucidating the effects of composition on the structure and photophysical properties of MM'Se and MM'Te materials. Herein, we describe the synthesis and initial reactivity studies of the complexes [(3,5-Me 2 C 5 H 3 N) 2 Zn-(ESiMe 3 ) 2 ] (E = Se (1), Te (2)), where the labile 3,5-lutidine ligands of 1 and 2 afford the opportunity to access ternary II-II'-VI nanoclusters in which the metal ions are intimately mixed by the controlled delivery of {ZnE 2 }.

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Size and shape controlled ZnTe nanocrystals with quantum confinement effect

Cited by 111 publications

References 34 publications

Ferrocene‐Based Trimethylsilyl Chalcogenide Reagents for the Assembly of Functionalized Metal–Chalcogen Architectures

Ferrocene‐Based Trimethylsilyl Chalcogenide Reagents for the Assembly of Functionalized Metal–Chalcogen Architectures

Control of Metal‐Ion Composition in the Synthesis of Ternary II‐II′‐VI Nanoparticles by Using a Mixed‐Metal Cluster Precursor Approach

Imine‐Stabilized Zinc Trimethylsilylchalcogenolates: Powerful Reagents for the Synthesis of II‐II′‐VI Nanocluster Materials

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