A Reversible Dual‐Response Fluorescence Switch for the Detection of Multiple Analytes

Geng, Junlong; Liu, Ping; Liu, Bianhua; Guan, Guijian; Zhang, Zhongping; Han, Ming‐Yong

doi:10.1002/chem.200902721

Cited by 48 publications

(34 citation statements)

References 46 publications

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“…The APTES-NBD conjugates were synthesized according to the reported method (Geng et al, 2010). 11.8 mg NBD-Cl was first dissolved in 10 mL anhydrous ethanol containing APTES (0.5 mL; molar ratio of NBD/APTS 1:40) with stirring in a dry nitrogen atmosphere.…”

Section: Synthesis Of Aptes-nbd Conjugatesmentioning

confidence: 99%

Molecular imprinting ratiometric fluorescence sensor for highly selective and sensitive detection of phycocyanin

Wang

Kang

et al. 2016

Biosensors and Bioelectronics

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a b s t r a c tA facile strategy was developed to prepare molecular imprinting ratiometric fluorescence sensor for highly selective and sensitive detection of phycocyanin (PC) based on fluorescence resonance energy transfer (FRET), via a sol-gel polymerization process using nitrobenzoxadiazole (NBD) as fluorescent signal source. The ratio of two fluorescence peak emission intensities of NBD and PC was utilized to determine the concentration of PC, which could effectively reduce the background interference and fluctuation of diverse conditions. As a result, this sensor obtained high sensitivity with a low detection limit of 0.14 nM within 6 min, and excellent recognition specificity for PC over its analogues with a high imprinting factor of 9.1. Furthermore, the sensor attained high recoveries in the range of 93.8-110.2% at three spiking levels of PC, with precisions below 4.7% in seawater and lake water samples. The developed sensor strategy demonstrated simplicity, reliability, rapidity, high selectivity and high sensitivity, proving to be a feasible way to develop high efficient fluorescence sensors and thus potentially applicable for ultratrace analysis of complicated matrices.

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Section: Synthesis Of Aptes-nbd Conjugatesmentioning

confidence: 99%

Molecular imprinting ratiometric fluorescence sensor for highly selective and sensitive detection of phycocyanin

Wang

Kang

et al. 2016

Biosensors and Bioelectronics

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“…On the other hand, fluorescent detection has attracted a great deal of interest for various chemically, environmentally, and biologically significant species such as 2,4-D (Vinayaka et al, 2009), owing to the capabilities of high sensitivity and convenience (Geng et al, 2010;Vinayaka et al, 2009;Yu et al, 2015;Zhang et al, 2015a;Zhu et al, 2014). It is considered to be an efficient way to develop MIP-based fluorescence sensors, which will combine the advantages of high selectivity of MIPs recognition and high sensitivity of fluorescence detection (Vinayaka et al, 2009;Wu et al, 2015;Zhang et al, 2015b).…”

Section: Introductionmentioning

confidence: 99%

A molecular imprinting-based turn-on Ratiometric fluorescence sensor for highly selective and sensitive detection of 2,4-dichlorophenoxyacetic acid (2,4-D)

Wang

et al. 2016

Biosensors and Bioelectronics

169

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a b s t r a c tA novel molecular imprinting-based turn-on ratiometric fluorescence sensor was constructed via a facile sol-gel polymerization for detection of 2,4-dichlorophenoxyacetic acid (2,4-D) on the basis of photoinduced electron transfer (PET) by using nitrobenzoxadiazole (NBD) as detection signal source and quantum dots (QDs) as reference signal source. With the presence and increase of 2,4-D, the amine groups on the surface of QDs@SiO 2 could bind with 2,4-D and thereby the NBD fluorescence intensities could be significantly enhanced since the PET process was inhibited, while the QDs maintained constant intensities. Accordingly, the ratio of the dual-emission intensities of green NBD and red QDs could be utilized for turn-on fluorescent detection of 2,4-D, along with continuous color changes from orange-red to green readily observed by the naked eye. The as-prepared fluorescence sensor obtained high sensitivity with a low detection limit of 0.14 μM within 5 min, and distinguished recognition selectivity for 2,4-D over its analogs. Moreover, the sensor was successfully applied to determine 2,4-D in real water samples, and high recoveries at three spiking levels of 2,4-D ranged from 95.0% to 110.1% with precisions below 4.5%. The simple, rapid and reliable visual sensing strategy would not only provide potential applications for high selective ultratrace analysis of complicated matrices, but also greatly enrich the research connotations of molecularly imprinted sensors.

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“…They applied these nanoparticles into chips on an etched silicon wafer for the detection of TNT and the proton target. The assembled chip can be detect herbicide (2,4-dichlorophenoxyacetic acid) and TNT residues and also NBD-grafted silica nanoparticles show a reversible signal and good assembly flexibility; thus, they can be applied in multianalyte detection [152].…”

Section: Biomimetics Smart Polymermentioning

confidence: 99%

Biomimetic Materials Toward Application of Nanobiodevices

Singh

Choi

Tiwari

et al. 2012

Intelligent Nanomaterials

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Biology is inherently nano, with the focus on a cell, which is a warehouse of structures and functional units that are finely harmonized on the nanometer scale. New intelligent nanobiodevices and new nanostructures biomaterials are expected to speed up quantitative biomedical research, boost our diagnostic capabilities, and increase the length and quality of our lives. At the same time, nanostructures inspired by nature or created using biological processes are expected to reduce the production costs of new nanodevices making them accessible for the public. Nanobiotechnology is an emerging field that has made its contribution to all spheres of human life. The biological synthesis of nanoparticles has paved the way for better methodologies and approaches in the fabrication of nanobiodevices. There is an ever-increasing need to develop environmentally benign processes, i.e. biomimetic methods in place of synthetic protocols involving toxic ingredients. This is an economical, efficient, eco-friendly, and simple process. Progress in this area will provide new green paths in the development of controlled shape and size NPs. There is an enormous interest in exploiting biomimetic materials in variety of applications to nanobiodevices, such as nanobios"ensors and nanobioelectronic, as their size scale is similar to that of biological molecules (e.g., proteins, DNA, recombinant

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A Reversible Dual‐Response Fluorescence Switch for the Detection of Multiple Analytes

Cited by 48 publications

References 46 publications

Molecular imprinting ratiometric fluorescence sensor for highly selective and sensitive detection of phycocyanin

Molecular imprinting ratiometric fluorescence sensor for highly selective and sensitive detection of phycocyanin

A molecular imprinting-based turn-on Ratiometric fluorescence sensor for highly selective and sensitive detection of 2,4-dichlorophenoxyacetic acid (2,4-D)

Biomimetic Materials Toward Application of Nanobiodevices

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