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Luminescence Enhancement based Sensing of L-Cysteine by Doped Quantum Dots.
Chemistry - An Asian Journal ( IF 4.1 ) Pub Date : 2020-04-30 , DOI: 10.1002/asia.202000466
Sabyasachi Pramanik 1 , Shilaj Roy 2 , Satyapriya Bhandari 3
Affiliation  

The interaction of a presynthesized orange emitting Mn2+‐doped ZnS quantum dots (QDs) with L‐Cysteine (L−Cys) led to enhance emission intensity (at 596 nm) and quantum yield (QY). Importantly, the Mn2+‐doped ZnS QDs exhibited high sensitivity towards L−Cys, with a limit of detection of 0.4±0.02 μM (in the linear range of 3.3–13.3 μM) and high selectivity in presence of interfering amino acids and metal ions. The association constant of L−Cys was determined to be 0.36×105 M−1. The amplified passivation of the surface of Mn2+‐doped ZnS QDs following the incorporation and binding of L−Cys is accounted for the enhancement in their luminescence features. Moreover, the luminescence enhancement‐based detection will bring newer dimension towards sensing application.

中文翻译:

掺杂量子点对L-半胱氨酸的发光增强传感。

预合成的橙色发射Mn 2+掺杂的ZnS量子点(QDs)与L-半胱氨酸(L-Cys)的相互作用导致发射强度(596 nm)和量子产率(QY)增强。重要的是,掺杂Mn 2+的ZnS QD对L-Cys具有高灵敏度,检测限为0.4±0.02μM(在3.3-13.3μM的线性范围内),并且在存在干扰氨基酸和金属的情况下具有高选择性离子。L-Cys的缔合常数被确定为0.36×10 5  M -1。Mn 2+表面的放大钝化L-Cys的掺入和结合后掺杂的ZnS QD导致了其发光特性的增强。此外,基于发光增强的检测将为传感应用带来新的维度。
更新日期:2020-07-01
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