Tuning the Surface Structure and Optical Properties of CdSe Clusters Using Coordination Chemistry.
Tuning the Surface Structure and Optical Properties of CdSe Clusters Using Coordination Chemistry.
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DOI：
10.1021/jz2013769
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发表时间：
2011-11
期刊：
影响因子：
--
通讯作者：
Owen JS
中科院分区：
文献类型：
--
作者：
Cossairt BM;Juhas P;Billinge S;Owen JS
以1-萘甲酸镉、2-萘甲酸镉、4-硫甲基-1-萘甲酸镉、1-萘硫醇镉配合物和二苯基硒化膦（DPPSe）为原料，制备了一系列非化学计量的CdSe团簇，其最低能量在409 - 420 nm之间。对分布函数分析的X-射线衍射数据，配体交换实验，和NMR分子量分析表明，尽管显着的变化，其吸收和发光光谱，这些集群之间的dielectric核心变化最小。在77 K下获得的光致发光激发光谱揭示了表面捕获激发态和含萘配体之间的能量转移过程，导致配体磷光。Dexter能量转移机制被提出来解释观察到的配体磷光激发的集群。这些化合物表明，簇吸收和陷阱发光可以控制与表面配位化学。
A series of nonstoichiometric CdSe clusters with lowest energy electronic absorptions between 409 – 420 nm has been prepared from cadmium 1-naphthoate, 2-naphthoate, 4-thiomethyl-1-naphthaote, and 1-naphthalene thiolate complexes and diphenylphosphine selenide (DPPSe). Pair distribution function analysis of X-ray diffraction data, ligand exchange experiments, and NMR molecular weight analyses suggest the nanocrystal core changes minimally among these clusters despite significant changes to their absorption and luminescence spectra. Photoluminescence excitation spectra obtained at 77 K reveal an energy transfer process between the surface-trapped excited state and the naphthalene-containing ligands that leads to ligand phosphorescence. A Dexter energy transfer mechanism is proposed to explain the observation of ligand phosphorescence on excitation of the cluster. These compounds demonstrate that cluster absorption and trap luminescence can be controlled with surface coordination chemistry.
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影响因子：
3.7
作者：
NIRMAL, M;MURRAY, CB;BAWENDI, MG
通讯作者：
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影响因子：
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作者：
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影响因子：
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作者：
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影响因子：
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影响因子：
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作者：
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