Pyrene or rhodamine derivative–modified surfaces of electrospun nanofibrous chemosensors for colorimetric and fluorescent determination of Cu 2+ , Hg 2+ , and pH

Cho, Chia‐Jung; Lu, Shih-Tung; Kuo, Chi‐Ching; Liang, Fang‐Cheng; Chen, Bo‐Yu; Chu, Chien‐Chia

doi:10.1016/j.reactfunctpolym.2016.05.019

Cited by 44 publications

(43 citation statements)

References 36 publications

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“…As can be seen, the developed method avoids a time-consuming derivatization step, especially compared with surface-enhanced Raman spectroscopy40, chemiluminescence detection44 and fluorescent chemodosimeter based on the rhodamine spirolactam derivative4546, etc. Besides the above, under the optimized conditions, this novel method presents higher sensitivity than that of the rhodamine-based method (97 nM, 100 nM)4547.…”

Section: Resultsmentioning

confidence: 90%

A novel label-free fluorescence assay for one-step sensitive detection of Hg2+ in environmental drinking water samples

Wang

Liu

et al. 2017

Sci Rep

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A novel label-free fluorescence assay for detection of Hg2+ was developed based on the Hg2+-binding single-stranded DNA (ssDNA) and SYBR Green I (SG I). Differences from other assays, the designed rich-thymine (T) ssDNA probe without fluorescent labelling can be rapidly formed a T-Hg2+-T complex and folded into a stable hairpin structure in the presence of Hg2+ in environmental drinking water samples by facilitating fluorescence increase through intercalating with SG I in one-step. In the assay, the fluorescence signal can be directly obtained without additional incubation within 1 min. The dynamic quantitative working ranges was 5–1000 nM, the determination coefficients were satisfied by optimization of the reaction conditions. The lowest detection limit of Hg2+ was 3 nM which is well below the standard of U.S. Environmental Protection Agency. This method was highly specific for detecting of Hg2+ without being affected by other possible interfering ions from different background compositions of water samples. The recoveries of Hg2+ spiked in these samples were 95.05–103.51%. The proposed method is more viable, low-costing and simple for operation in field detection than the other methods with great potentials, such as emergency disposal, environmental monitoring, surveillance and supporting of ecological risk assessment and management.

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Section: Resultsmentioning

confidence: 90%

A novel label-free fluorescence assay for one-step sensitive detection of Hg2+ in environmental drinking water samples

Wang

Liu

et al. 2017

Sci Rep

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“…The electrospinning process is inexpensive, facile, and versatile for producing submicron scale fibers, which has been used extensively in many studies and applications [18][19][20][21][22][23][24][25][26][27]. Various florescent electrospun (ES) polymer nanofiber-based chemosensors in our previous studies were designed for sensing pH [28][29][30][31][32], temperature [33][34][35], and NO gas [36].…”

Section: Multifunctional Fluorescent Copolymers Containingmentioning

confidence: 99%

“…Notably, some studies have reported fluorescent ES nanofiber-based chemosensors for sensing specific HTMs such as Fe 3+ [29], Hg 2+ [28,31,32,35,37], Zn 2+ [30,37], and Cu 2+ [31,37]. We previously reported a novel fluorescent chemosensory ES nanofibrous membrane with high selectivity and reversibility toward pH-and Hg 2+ , which was prepared using poly(hydroxyethyl-co-N-methylolacrylamide-co-rhodamine derivative) copolymers.…”

Section: Multifunctional Fluorescent Copolymers Containingmentioning

confidence: 99%

“…which were recorded using a Fluorolog-3 spectrofluorometer (Horiba Jobin Yvon). All PL spectra of ES Nanofiber for pH and Hg 2+ sensing were recorded using the Fluorolog-3 spectrofluorometer and excited at a wavelength of 540 nm, as described in Supporting Information, which is similar to that in our previous studies [28][29][30][31][32][33][34][35][36][37].…”

Section: Multifunctional Fluorescent Copolymers Containingmentioning

confidence: 99%

“…The ES nanofibers were fabricated using electrospinning process as described in Scheme 1(b), similar to that in our previous reports [28][29][30][31][32][33][34][35][36][37]. The polymer solution of P1, P2, and P3,…”

Section: Preparation Of Electrospun Fibers and Drop-cast Filmsmentioning

confidence: 99%

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Novel Multifunctional Luminescent Electrospun Fluorescent Nanofiber Chemosensors-Filter and Their Versatile Sensing of pH, Temperature, and Metal Ions

Chen¹,

Lung²,

Kuo³

et al. 2018

Preprint

Self Cite

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Novel multifunctional fluorescent chemosensors composed of electrospun (ES) nanofibers with high sensitivity toward pH, mercury ions (Hg2+), and temperature were prepared from poly(N-Isopropylacrylamide-co-N-methylolacrylamide-co-rhodamine derivative) (poly(NIPAAm-co-NMA-co-RhBN2AM)) by employing electrospinning process. NIPAAm and NMA moieties provide hydrophilic and thermo-responsive properties (absorption of Hg2+ in aqueous solutions), and chemical cross-linking sites (stabilization of the fibrous structure in aqueous solutions), respectively. The fluorescent probe, RhBN2AM is highly sensitive toward pH and Hg2+. Synthesis of poly(NIPAAm-co-NMA-co-RhBN2AM) with different compositions were carried on via free-radical polymerization. ES nanofibers prepared from sensory copolymers with a 71.1:28.4:0.5 NIPAAm: NMA: RhBN2AM ratio (P3 ES nanofibers) exhibited significant color change from nonfluorescent to red fluorescence while sensing pH or Hg2+, and high reversibility of on/off switchable fluorescence emission when Hg2+ and ethylenediaminetetraacetic acid (EDTA) were sequentially added. The P3 ES nanofibrous membranes had a higher surface-to-volume ratio to enhance their performance than did the corresponding thin films. In addition, the fluorescence emission of P3 ES nanofibrous membranes exhibited second enhancement above the lower critical solution temperature. Thus, the ES nanofibrous membranes prepared from P3 with on/off switchable capacity and thermo-responsive characteristics can be used as multifunctional sensory devise for specific heavy transition metal (HTM) in aqueous solutions.

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Colorimetric Nanofibers as Optical Sensors

Schoolaert

Hoogenboom

Clerck

2017

Adv Funct Materials

118

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Sensors play a major role in many applications today, ranging from biomedicine to safety equipment, where they detect and warn us about changes in the environment. Nanofibers, characterized by high porosity, flexibility, and a large specific surface area, are the ideal material for ultrasensitive, fastresponding, and user-friendly sensor design. Indeed, a large specific surface area increases the sensitivity and response time of the sensor as the contact area with the analyte is enlarged. Thanks to the flexibility of membranes, nanofibrous sensors cannot only be applied in high-end analyte detection, but also in personal, daily use. Many different nanofibrous sensors have already been designed; albeit, the most straightforward and easiest-to-interpret sensor response is a visual change in color, which is of particular interest in the case of warning signals. Recently, many researchers have focused on the design of so-called colorimetric nanofibers, which typically involve the incorporation of a colorimetric functionality into the nanofibrous matrix. Many different strategies have been used and explored for colorimetric nanofibrous sensor design, which are outlined in this feature article. The many examples and applications demonstrate the value of colorimetric nanofibers for advanced optical sensor design, and could provide directions for future research in this area.

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Pyrene or rhodamine derivative–modified surfaces of electrospun nanofibrous chemosensors for colorimetric and fluorescent determination of Cu 2+ , Hg 2+ , and pH

Cited by 44 publications

References 36 publications

A novel label-free fluorescence assay for one-step sensitive detection of Hg2+ in environmental drinking water samples

A novel label-free fluorescence assay for one-step sensitive detection of Hg2+ in environmental drinking water samples

Novel Multifunctional Luminescent Electrospun Fluorescent Nanofiber Chemosensors-Filter and Their Versatile Sensing of pH, Temperature, and Metal Ions

Colorimetric Nanofibers as Optical Sensors

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