A bifunctional chromogenic and fluorogenic probe for F− and Al3+ based on azo-benzimidazole conjugate

Iniya, Murugan; Jeyanthi, Dharmaraj; Krishnaveni, Karuppiah; Chellappa, Duraisamy

doi:10.1016/j.jlumin.2014.09.018

Cited by 44 publications

(16 citation statements)

References 56 publications

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“…of C-dots-R6G in the solution for analysis of Al 3+ was determined from the emission ratio of the two wavelengths (I 560 /I 410 ) and found to be 3.8 × 10 -5 M (Figure 2b), which showed values comparable to previous reports. [63][64][65][66] The selectivity of C-dots-R6G in ethanol solution for various metal ions was investigated by fluorescence measurements. The intensity ratio (I 560 /I 410 ) was nearly unchanged in the 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 presence of other metal ions (Figure 3).…”

Section: Resultsmentioning

confidence: 99%

New Fluorescent Metal-Ion Detection Using a Paper-Based Sensor Strip Containing Tethered Rhodamine Carbon Nanodots

Kim

Jang

Lee

2015

ACS Appl. Mater. Interfaces

154

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A strip of tethered rhodamine carbon nanodots (C-dots) was designed for selective detection of Al(3+) ion using a Förster resonance energy transfer (FRET)-based ratiometric sensing mechanism. The probe consisted of rhodamine B moieties immobilized on the surface of water-soluble C-dots. Upon exposure to Al(3+), the rhodamine moieties showed a much enhanced emission intensity via energy transfer from the C-dots under excitation at their absorption wavelength. The detection mechanism was related to the Al(3+)-induced ring-opening of rhodamine on C-dots through the chelation of the rhodamine 6G moiety with Al(3+), leading to a spectral overlap of the absorption of C-dots (donor) and the emission of ring-opened rhodamine (acceptor). In addition, a paper-based sensor strip containing the tethered rhodamine C-dots was prepared for practical, versatile applications of Al(3+) sensing. The paper-based sensor could detect Al(3+) over other metal ions efficiently, even from a mixture of metal ions, with increased emission intensity at long-wavelength emission via FRET. Sensing based on FRET of C-dots is color-tunable, can be recognized with a naked eye, and may provide a new platform for specific metal-ion sensing.

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Section: Resultsmentioning

confidence: 99%

New Fluorescent Metal-Ion Detection Using a Paper-Based Sensor Strip Containing Tethered Rhodamine Carbon Nanodots

Kim

Jang

Lee

2015

ACS Appl. Mater. Interfaces

154

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“…30,27,24,21,18,15,12,9,6 and 3 μL of the 1 solution were taken and transferred to vials. Cu 2+ solution (10 mM) was prepared by dissolving nitrate salts in acetonitrile/bis-tris buffer (7:3; v/v, 1 mL).…”

Section: Job Plot Measurementsmentioning

confidence: 99%

“…12 Therefore, we designed and synthesized a new chemosensor 1 based on the combination of the julolidine and nitropyridine moieties, and tested its sensing properties towards various metal ions and anions. 11 On the other hand, the presence of the electron-withdrawing nitro group on the amino-pyridyl moiety would increase not only the degree of π-conjugation but also the hydrogen bonding ability of the amino NH proton.…”

Section: Introductionmentioning

confidence: 99%

Chromogenic naked-eye detection of copper ion and fluoride

et al. 2015

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A bi-functional colorimetric chemosensor 1, based on julolidine moiety and N-(2-aminoethyl)-5-nitropyridin-2-amine, has been synthesized and characterized. The sensor 1 has proven to be highly selective and sensitive to Cu 2+ with a color change from colorless to yellow in aqueous solution. The sensing mechanism of 1 for Cu 2+ was proposed to be the ligand-to-metal chargetransfer (LMCT), which was explained by theoretical calculations. It was also found that the 1-Cu 2+ complex could be recycled simply through treatment with an appropriate reagent such as EDTA. Importantly, the sensor 1 could be used to detect and quantify Cu 2+ in water samples.Moreover, 1 showed a selective colorimetric response toward fluoride due to the increase in the intramolecular charge transfer (ICT) band by a deprotonation process without any inhibition from other anions such as CH3COOand CN -.

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“…例如, Su 等 [106] 利用 N-烷基取代的 2-苯基苯并咪唑和其他含氮配体与金属铱配位, 构建了可应用于 PA 检测的荧光化学传感器. 杯芳烃修饰的苯并咪唑传感器除可应用于金属离子的检测外 [45] , 也可应用于硝基爆炸物的检测, 如传感器 110 (Scheme 27 化合物 77 除可应用于 Al 3＋的检测外 [65] , 也可利用 [111] .…”

Section: 应用于有机分子的检测unclassified

Progress in the Synthesis and Application of Benzimidazole-Based Fluorescent Chemosensors

Wu¹,

You²,

Guan³

et al. 2015

Chin. J. Org. Chem.

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Many benzimidazole compounds can emit characteristic fluorescence in various organic solvents and aqueous solutions, and their fluorescence properties can be influenced by some factors under certain conditions, which make them used in the field of fluorescence detection. Recently, more and more attention has been attached to the benzimidazole-based fluorescent chemosensors. Their synthesis and the extensive application in the detection of metal ions, anions, inorganic small molecules, metal oxide nanoparticles, organic small molecules, and so on are reviewed. The development trend of benzimidazole-based fluorescent chemosensors is prospected.

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A bifunctional chromogenic and fluorogenic probe for F− and Al3+ based on azo-benzimidazole conjugate

Cited by 44 publications

References 56 publications

New Fluorescent Metal-Ion Detection Using a Paper-Based Sensor Strip Containing Tethered Rhodamine Carbon Nanodots

New Fluorescent Metal-Ion Detection Using a Paper-Based Sensor Strip Containing Tethered Rhodamine Carbon Nanodots

Chromogenic naked-eye detection of copper ion and fluoride

Progress in the Synthesis and Application of Benzimidazole-Based Fluorescent Chemosensors

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