Dummy Molecularly Imprinted Polymers-Capped CdTe Quantum Dots for the Fluorescent Sensing of 2,4,6-Trinitrotoluene
Xu, Shoufang1,2,3; Lu, Hongzhi1; Li, Jinhua2; Song, Xingliang1; Wang, Aixiang1; Chen, Lingxin2; Han, Shaobo1
发表期刊ACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
2013-08-28
卷号5期号:16页码:8146-8154
关键词Quantum Dots Molecularly Imprinted Polymers Dummy Template Fluorescent Detection Seed-growth Method 2 4 6-trinitrotoluene
产权排序[Xu, Shoufang; Lu, Hongzhi; Song, Xingliang; Wang, Aixiang; Han, Shaobo] Linyi Univ, Sch Chem & Chem Engn, Linyi 276005, Peoples R China; [Xu, Shoufang; Li, Jinhua; Chen, Lingxin] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai 264003, Peoples R China; [Xu, Shoufang] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
通讯作者Chen, LX (reprint author), Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai 264003, Peoples R China. lxchen@yic.ac.cn
英文摘要Molecularly imprinted polymers (MIPs) with trinitrophenol (TNP) as a dummy template molecule capped with CdTe quantum dots (QDs) were prepared using 3-aminopropyltriethoxy silane (APTES) as the functional monomer and tetraethoxysilane (TEOS) as the cross linker through a seedgrowth method via a sol gel process (i.e., DMIP@QDs) for the sensing of 2,4,6-trinitrotoluene (TNT) on the basis of electron-transfer-induced fluorescence quenching. With the presence and increase of TNT in sample solutions, a Meisenheimer complex was formed between TNT and the primary amino groups on the surface of the QDs. The energy of the QDs was transferred to the complex, resulting in the quenching of the QDs and thus decreasing the fluorescence intensity, which allowed the TNT to be sensed optically. DMIP@QDs generated a significantly reduced fluorescent intensity within less than 10 min upon binding TNT. The fluorescence-quenching fractions of the sensor presented a satisfactory linearity with TNT concentrations in the range of 0.8-30 mu M, and its limit of detection could reach 0.28 mu M. The sensor exhibited distinguished selectivity and a high binding affinity to TNT over its possibly competing molecules of 2,4-dinitrophenol (DNP), 4-nitrophenol (4-NP), phenol, and dinitrotoluene (DNT) because there are more nitro groups in TNT and therefore a stronger electron-withdrawing ability and because it has a high similarity in shape and volume to TNP. The sensor was successfully applied to determine the amount of TNT in soil samples, and the average recoveries of TNT at three spiking levels ranged from 90.3 to 97.8% with relative standard deviations below 5.12%. The results provided an effective way to develop sensors for the rapid recognition and determination of hazardous materials from complex matrices.; Molecularly imprinted polymers (MIPs) with trinitrophenol (TNP) as a dummy template molecule capped with CdTe quantum dots (QDs) were prepared using 3-aminopropyltriethoxy silane (APTES) as the functional monomer and tetraethoxysilane (TEOS) as the cross linker through a seedgrowth method via a sol gel process (i.e., DMIP@QDs) for the sensing of 2,4,6-trinitrotoluene (TNT) on the basis of electron-transfer-induced fluorescence quenching. With the presence and increase of TNT in sample solutions, a Meisenheimer complex was formed between TNT and the primary amino groups on the surface of the QDs. The energy of the QDs was transferred to the complex, resulting in the quenching of the QDs and thus decreasing the fluorescence intensity, which allowed the TNT to be sensed optically. DMIP@QDs generated a significantly reduced fluorescent intensity within less than 10 min upon binding TNT. The fluorescence-quenching fractions of the sensor presented a satisfactory linearity with TNT concentrations in the range of 0.8-30 mu M, and its limit of detection could reach 0.28 mu M. The sensor exhibited distinguished selectivity and a high binding affinity to TNT over its possibly competing molecules of 2,4-dinitrophenol (DNP), 4-nitrophenol (4-NP), phenol, and dinitrotoluene (DNT) because there are more nitro groups in TNT and therefore a stronger electron-withdrawing ability and because it has a high similarity in shape and volume to TNP. The sensor was successfully applied to determine the amount of TNT in soil samples, and the average recoveries of TNT at three spiking levels ranged from 90.3 to 97.8% with relative standard deviations below 5.12%. The results provided an effective way to develop sensors for the rapid recognition and determination of hazardous materials from complex matrices.
文章类型Article
资助机构Scientific Research Foundation for the Returned Overseas Chinese Scholars; State Education Ministry; National Natural Science Foundation of China [21105117, 21275158, 21275068]; Scholarship Award for Excellent Doctoral Student; Ministry of Education of China; 100 Talents Program of the Chinese Academy of Sciences
收录类别SCI
语种英语
关键词[WOS]RESONANCE ENERGY-TRANSFER ; SOLID-PHASE EXTRACTION ; SELECTIVE EXTRACTION ; SILICA NANOPARTICLES ; WATER SAMPLES ; SURFACE ; SENSOR ; TNT ; PRECONCENTRATION ; HYBRID
研究领域[WOS]Science & Technology - Other Topics ; Materials Science
WOS记录号WOS:000323875800071
引用统计
被引频次:251[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.yic.ac.cn/handle/133337/6959
专题中国科学院海岸带环境过程与生态修复重点实验室
作者单位1.Linyi Univ, Sch Chem & Chem Engn, Linyi 276005, Peoples R China
2.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol Remedia, Yantai 264003, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Xu, Shoufang,Lu, Hongzhi,Li, Jinhua,et al. Dummy Molecularly Imprinted Polymers-Capped CdTe Quantum Dots for the Fluorescent Sensing of 2,4,6-Trinitrotoluene[J]. ACS APPLIED MATERIALS & INTERFACES,2013,5(16):8146-8154.
APA Xu, Shoufang.,Lu, Hongzhi.,Li, Jinhua.,Song, Xingliang.,Wang, Aixiang.,...&Han, Shaobo.(2013).Dummy Molecularly Imprinted Polymers-Capped CdTe Quantum Dots for the Fluorescent Sensing of 2,4,6-Trinitrotoluene.ACS APPLIED MATERIALS & INTERFACES,5(16),8146-8154.
MLA Xu, Shoufang,et al."Dummy Molecularly Imprinted Polymers-Capped CdTe Quantum Dots for the Fluorescent Sensing of 2,4,6-Trinitrotoluene".ACS APPLIED MATERIALS & INTERFACES 5.16(2013):8146-8154.
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