Highly sensitive fluorescent sensor for Mg2+ and Ca2+ based on a multi-addressable diarylethene

RSC Advances ◽  
2016 ◽  
Vol 6 (24) ◽  
pp. 19957-19963 ◽  
Author(s):  
Shiqiang Cui ◽  
Zhaoyan Tian ◽  
Shouzhi Pu ◽  
Yanfeng Dai
Keyword(s):  
Color Change ◽  
Fluorescent Sensor ◽  
Fluorescence Emission ◽  
Highly Sensitive

A new photochromic diarylethene bearing 8-aminoquinoline unit was designed and synthesized, and the multi-addressable behaviors were investigated. It was highly sensitive towards Mg2+ and Ca2+ with different fluorescence emission and color change.

scholarly journals A New Fluorescent Chemosensor for Cobalt(II) Ions in Living Cells Based on 1,8-Naphthalimide

Molecules ◽  
2019 ◽  
Vol 24 (17) ◽  
pp. 3093 ◽  
Author(s):  
Yu-Long Liu ◽  
Liu Yang ◽  
Lu Li ◽  
You-Quan Guo ◽  
Xiao-Xiao Pang ◽  
...  
Keyword(s):  
Fluorescence Enhancement ◽  
Color Change ◽  
Limit Of Detection ◽  
Fluorescent Sensor ◽  
Cell Permeability ◽  
Fluorescent Chemosensor ◽  
Fluorescent Method ◽  
Colorimetric Response ◽  
Highly Sensitive ◽  
Distinct Color

In this work, a highly selective fluorescent chemosensor N-(2-(2-butyl-1,3-dioxo-2,3-dihydro-1H-benzo[de]isoquinolin-6-yl)hydrazine-1-carbonothioyl)benzamide (L) was prepared and characterized. An assay to detect the presence of cobalt(II) ions was developed by utilizing turn-on fluorescence enhancement with visual colorimetric response. Upon treatment with Co2+, a remarkable fluorescence enhancement located at 450 nm was visible to naked eyes accompanied with a distinct color change (from pink to colorless) in a CH3CN/HEPES (4/1, v/v, pH = 7.4) solution due to the formation of a 1:1 complex at room temperature. In addition, the linear concentration range for Co2+ was 0–25 µM with the limit of detection down to 0.26 µM. Thus, a highly sensitive fluorescent method based on chelation-assisted fluorescence enhancement was developed for the trace-level detection of Co2+. The sensor was found to be highly selective toward Co2+ ions with a large number of coexisting ions. Furthermore, the L probe can serve as a fluorescent sensor for Co2+ detecting in biological environments, demonstrating its low toxic properties to organisms and good cell permeability in live cell imaging.

scholarly journals Novel Multifunctional Luminescent Electrospun Fluorescent Nanofiber Chemosensor-Filters and Their Versatile Sensing of pH, Temperature, and Metal Ions

Polymers ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1259 ◽  
Author(s):  
Bo-Yu Chen ◽  
Yen-Chen Lung ◽  
Chi-Ching Kuo ◽  
Fang-Cheng Liang ◽  
Tien-Liang Tsai ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Color Change ◽  
Ethylenediaminetetraacetic Acid ◽  
Fluorescence Emission ◽  
Volume Ratio ◽  
High Sensitivity ◽  
Electrospinning Process ◽  
Solution Temperature ◽  
Highly Sensitive ◽  
Nanofibrous Membranes

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 an 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+. The synthesis of poly(NIPAAm-co-NMA-co-RhBN2AM) with different compositions was 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 non-fluorescent to red fluorescence while sensing pH (the λPL, max exhibited a 4.8-fold enhancement) or Hg2+ (at a constant Hg2+ concentration (10−3 M), the λPL, max of P3-fibers exhibited 4.7-fold enhancement), and high reversibility of on/off switchable fluorescence emission at least five times 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 a multifunctional sensory device for specific heavy transition metal (HTM) in aqueous solutions.

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

2018 ◽  
Author(s):  
Bo-Yu Chen ◽  
Yen-Chen Lung ◽  
Chi-Ching Kuo ◽  
Fang-Cheng Liang ◽  
Tien-Liang Tsai ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Color Change ◽  
Ethylenediaminetetraacetic Acid ◽  
Fluorescence Emission ◽  
Volume Ratio ◽  
High Sensitivity ◽  
Electrospinning Process ◽  
Solution Temperature ◽  
Highly Sensitive ◽  
Nanofibrous Membranes

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.

Using Heterocycle to Improve the Selectivity of Rhodamine-6G Dye: Synthesis of Pyrrole-Modified Rhodamine-6G and its Recognition to Zn2+

2019 ◽  
Vol 41 (2) ◽  
pp. 300-300
Author(s):  
Rui Qiao Rui Qiao ◽  
Hai Yun Fan Hai Yun Fan ◽  
Cui Bing Bai Cui Bing Bai ◽  
Ling Dai Ling Dai ◽  
Lin Zhang Lin Zhang ◽  
...  
Keyword(s):  
Rhodamine 6G ◽  
Color Change ◽  
Fluorescent Sensor ◽  
Fluorescence Emission ◽  
High Sensitivity ◽  
Test Strip ◽  
Recognition Mechanism ◽  
Test Kit ◽  
Specific Selectivity ◽  
Distinct Color

The fluorescent sensor XQN for Zn2+ based on rhodamine-6G have been designed and synthesized. XQN showed fluorescent specific selectivity and high sensitivity for Zn2+ against other metal ions such as Fe3+, Cr3+, Hg2+, Ag+, Ca2+, Cu2+, Pb2+, Cd2+, Ni2+, Co2+ and Mg2+ in CH3CN-PBS(phosphate buffer saline) (10 mM, v/v=7:3, pH = 7.4) solution. The distinct color change and the rapid emergence of fluorescence emission provided naked-eyes detection for Zn2+. The test strip results showed that these sensors could act as a convenient and efficient Zn2+ test kit. The recognition mechanism of the sensor toward Zn2+ was evaluated by IR and the Job’s plots. The detection limits of XQN towards Zn2+ was calculated as 2.39 and#181;M. In addition, XQN-Zn2+ fluorescence lifetime and fluorescence quantum yield were also measured.

scholarly journals A highly sensitive and selective on–off fluorescent sensor based on a complex of polySchiff-Fe2+ for Cr(vi) detection in an aqueous medium

RSC Advances ◽  
2021 ◽  
Vol 11 (15) ◽  
pp. 8963-8969
Author(s):  
Zhiying Li ◽  
Congshu Li ◽  
Huiyun Yan
Keyword(s):  
Aqueous Medium ◽  
Fluorescent Sensor ◽  
Human Race ◽  
Safety And Health ◽  
Highly Sensitive

Designing exceptional probes to detect minute quantities of chromium(vi) is of huge importance for the safety and health of the human race.

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