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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Chemiluminescence Arising from the decomposition of peroxymonocarbonate and enhanced by CdTe quantum dots
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Chemiluminescence Arising from the decomposition of peroxymonocarbonate and enhanced by CdTe quantum dots

机译：过氧化一碳酸酯分解产生的化学发光，并由CdTe量子点增强

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摘要

CdTe quantum dots (QDs) capped with mercaptoacetic acid were applied to the hydrogen peroxide-sodium hydrogen carbonate chemiluminescence (CL) system. The CL emission intensity was significantly enhanced by different sizes of CdTe QDs. Peroxymonocarbonate (HCO_4~-) was formed in the reaction of hydrogen peroxide and sodium hydrogen carbonate, which was a reactive oxygen species. Decomposition of HCO_4~- generated superoxide ion radical (·O_2~-) and hydroxide radical (·OH). The enhanced CL was induced by the excited CdTe QDs, which could be produced from the combination of hole (oxidized QDs (h~+)) and electron (reduced QDs (e~-)) injected QDs. Radical scavengers and organic reagents such as nitro blue tetrazolium chloride (NBT), cytochrome c, sodium azide, ascorbic acid, thiourea, tert-butanol, and dimethyl sulphoxide were used to study the emitting species. The intermediate hydroxide radical and superoxide ion were key species for producing hole and electron-injected QDs. Four emitters such as ~1O_2, (O_2)_2, (CO_2)_2* and CdTe* were detected in the CL system. The mechanism was discussed based on the CL emission spectra, electron spin resonance spectra, fluorescence spectra, and UV-vis absorption spectra. The CL properties of CdTe QDs will be helpful to study semiconductor nanocrystals and will open new avenues for the application of QDs in many fields, such as chemistry, biology, microbiology, and biochemistry.
机译：将巯基乙酸封端的CdTe量子点（QD）应用于过氧化氢-碳酸氢钠化学发光（CL）系统。不同尺寸的CdTe QD显着提高了CL发射强度。过氧化氢与碳酸氢钠反应生成了过氧化一碳酸盐（HCO_4〜-）。 HCO_4〜-分解生成超氧离子自由基（·O_2〜-）和氢氧根自由基（·OH）。增强的CL由激发的CdTe QD诱导，这可以由注入空穴（氧化的QD（h〜+））和注入电子（还原的QD（e〜-））的QD组合产生。自由基清除剂和有机试剂，例如硝基硝基四氯化氮（NBT），细胞色素c，叠氮化钠，抗坏血酸，硫脲，叔丁醇和二甲基亚砜被用来研究发光物质。中间氢氧根和超氧离子是产生空穴和电子注入量子点的关键物质。在CL系统中检测到四个发射体，例如〜1O_2，（O_2）_2，（CO_2）_2 *和CdTe *。基于CL发射光谱，电子自旋共振光谱，荧光光谱和UV-vis吸收光谱对机理进行了讨论。 CdTe量子点的CL特性将有助于研究半导体纳米晶体，并为量子点在化学，生物学，微生物学和生物化学等许多领域的应用开辟新的途径。

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