Controlled synthesis of ternary II-II'-VI nanoclusters and the effects of metal ion distribution on their spectral properties.

Controlled synthesis of ternary II-II'-VI nanoclusters and the effects of metal ion distribution on their spectral properties.
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DOI:
10.1021/ic0481576
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发表时间:
2005-06
影响因子:
4.6
通讯作者:
M. Degroot;N. Taylor;J. Corrigan
M. Degroot;N. Taylor;J. Corrigan
中科院分区:
化学2区
文献类型:
--
作者:
M. Degroot;N. Taylor;J. Corrigan

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的反应[(3,5-Me(2)-C(5)H(3)N)(2)Zn(ESiMe(3))(2)](E = Se,在PhESiMe(3)和P(n)Pr(3)存在下,在低温下,Te)与乙酸镉(II)反应,生成三元纳米团簇[Zn(x)()Cd(10)(-)(x)()E(4)-(EPh)(12)(P(n)()Pr(3))(4)] [E = Se,x = 1.8(2a),2.6(2b); Te,x = 1.8(3a),2.6(3b)]。簇合物[Zn(3)Hg(7)Se(4)(SePh)(12)(P(n)Pr(3))(4)](4)和[Cd(3.7)汞(6.3)Se(4)(SePh)(12)(P(n)()Pr(3))(4)](5)可以通过类似的反应得到,涉及[(3,5-Me(2)-C(5)H(3)N)(2)Zn(SeSiMe(3))(2)]或[(N,N '-tmeda)Cd(SeSiMe(3))(2)](1)和氯化汞(II)。金属甲硅烷基硫族化物试剂是簇合成中{ME(2)}的有效递送源,因此,这些簇的金属离子含量可以通过控制反应化学计量容易地调节。醋酸镉与[(3,5-Me(2)-C(5)H(3)N)(2)Zn(SSiMe(3))(2)]、PhSSiMe(3)和P(n)()Pr(3)反应得到较大的纳米簇[Zn(2.3)Cd(14.7)S(4)(SPh)(26)(P(n)()Pr(3))(2)](6)。Zn(II)掺入{Cd(10)E}(E = Se,Te)和Zn(II)或Cd(II)掺入{Hg(10)Se}纳米团簇导致第一“激子”跃迁能量的显著蓝移。配合物2和3的固态热分析表明,这些集群可以用作单源前体大块三元Zn(x)Cd(1)(-)(x)E材料以及较大的中间集群,并保留在这些反应中的金属离子的比例。
The reaction of [(3,5-Me(2)-C(5)H(3)N)(2)Zn(ESiMe(3))(2)] (E = Se, Te) with cadmium(II) acetate in the presence of PhESiMe(3) and P(n)Pr(3) at low temperature leads to the formation of single crystals of the ternary nanoclusters [Zn(x)()Cd(10)(-)(x)()E(4)-(EPh)(12)(P(n)()Pr(3))(4)] [E = Se, x = 1.8 (2a), 2.6 (2b); Te, x = 1.8 (3a), 2.6 (3b)] in good yield. The clusters [Zn(3)Hg(7)Se(4)(SePh)(12)(P(n)()Pr(3))(4)] (4) and [Cd(3.7)Hg(6.3)Se(4)(SePh)(12)(P(n)()Pr(3))(4)] (5) can be accessed by similar reactions involving [(3,5-Me(2)-C(5)H(3)N)(2)Zn(SeSiMe(3))(2)] or [(N,N'-tmeda)Cd(SeSiMe(3))(2)] (1) and mercury(II) chloride. The metal silylchalcogenolate reagents are efficient delivery sources of {ME(2)} in cluster synthesis, and thus, the metal ion content of these clusters can be readily moderated by controlling the reaction stoichiometry. The reaction of cadmium acetate with [(3,5-Me(2)-C(5)H(3)N)(2)Zn(SSiMe(3))(2)], PhSSiMe(3), and P(n)()Pr(3) affords the larger nanocluster [Zn(2.3)Cd(14.7)S(4)(SPh)(26)(P(n)()Pr(3))(2)] (6). The incorporation of Zn(II) into {Cd(10)E} (E = Se, Te) and Zn(II) or Cd(II) into {Hg(10)Se} nanoclusters results in a significant blue shift in the energy of the first "excitonic" transition. Solid-state thermolysis of complexes 2 and 3 reveals that these clusters can be used as single-source precursors to bulk ternary Zn(x)Cd(1)(-)(x)E materials as well as larger intermediate clusters and that the metal ion ratio is retained during these reactions.