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首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >Donor-acceptor binding interaction of 1-(naphthalene-1-yl)-2,4,5-triphenyl-1H-imidazole with semiconductor nanomaterials
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Donor-acceptor binding interaction of 1-(naphthalene-1-yl)-2,4,5-triphenyl-1H-imidazole with semiconductor nanomaterials

机译：1-（萘-1-基）-2,4,5-三苯基-1H-咪唑与半导体纳米材料的供体-受体结合相互作用

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摘要

The dynamics of photoinduced electron injection from 1-(naphthalene-1-yl)-2,4,5-triphenyl-1H-imidazole (NTI) to pristine ZnO, Mn-doped TiO2 and BaTiO3 nanoparticles have been studied by absorption, fluorescence and lifetime spectroscopic methods. Both the absorption and fluorescence results suggest the association between the nanoparticles and NTI. The calculated free energy change (Delta G(et)) confirms the electron injection from NTI to nano semiconductors. The critical energy transfer distance between NTI and the nanoparticles have been deduced. The emission of NTI is enhanced by pristine ZnO and quenched by Mn-doped TiO2 and BaTiO3 nanoparticles which are likely due to change of LUMO and HOMO levels of NTI on its association with nano semiconductors. The strong adsorption of the NTI on the surface of ZnO nanocrystals is likely due to the chemical affinity of the nitrogen atom of the NTI to the zinc ion on the surface of nanocrystals. Electron injection from photoexcited NTI to the CB(S* -> S+ e(CB)(-)) is likely to be the reason for the fluorescence enhancement. (C) 2014 Elsevier B.V. All rights reserved.
机译：通过吸收，荧光和化学方法研究了从1-（萘-1-基）-2,4,5-三苯基-1H-咪唑（NTI）向原始ZnO，Mn掺杂的TiO2和BaTiO3纳米粒子进行光诱导电子注入的动力学。寿命光谱法。吸收和荧光结果都表明纳米颗粒和NTI之间存在关联。计算出的自由能变化（Delta G（et））证实了从NTI向纳米半导体的电子注入。推导了NTI和纳米颗粒之间的临界能量转移距离。原始的ZnO增强了NTI的发射，并通过Mn掺杂的TiO2和BaTiO3纳米粒子淬灭了NTI，这很可能是由于NTI与纳米半导体缔合时LUMO和HOMO含量的变化。 NTI在ZnO纳米晶体表面上的强吸附很可能是由于NTI的氮原子对纳米晶体表面上的锌离子的化学亲和力所致。从光激发的NTI向CB（S *-> S + e（CB）（-））注入电子很可能是荧光增强的原因。 （C）2014 Elsevier B.V.保留所有权利。

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