Ratio‐Au: A FRET‐based Fluorescent Probe for Ratiometric Determination of Gold Ions and Nanoparticles

Cao, Xiaowei; Lin, Weiying; Ding, Yundi

doi:10.1002/chem.201003586

Cited by 63 publications

(27 citation statements)

References 36 publications

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“…The limit of detection (C lim ) was determined using the equation C lim = 3␦/k, where ␦ is the standard deviation of the blank assays (n = 5) and k is the slope of the calibration plot. The detection limit was 0.0152 mol L −1 , which is lower than has been achieved using previously reported methods (Table 1) [11,40,41].…”

Section: Analytical Parameters and Determination Of Au(iii) In Samplescontrasting

confidence: 42%

Sensitive detection of Au(III) using regenerative rhodamine B–functionalized chitosan nanoparticles

Liu

et al. 2016

Sensors and Actuators B: Chemical

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Section: Analytical Parameters and Determination Of Au(iii) In Samplescontrasting

confidence: 42%

Sensitive detection of Au(III) using regenerative rhodamine B–functionalized chitosan nanoparticles

Liu

et al. 2016

Sensors and Actuators B: Chemical

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“…Thek nown starting material 1 was made in analogy with ag eneral literature procedure, [5] by converting R575 perchlorate to its acid chloride (using thionyl chloride) that was then treated with propargylamine (see the Supporting Information;y ields of 65-73 %). It has previously been made from the acid chloride generated using POCl 3 , [11] or by using O-benzotriazole-N,N,N',N'-tetramethyl-uronium hexafluorophosphate (HBTU) and triethylamine to attach propagylamine. [12] The other starting material 2 was prepared by treating the acid chloride generated from RB chloride with p-iodoaniline (yield of 52 %);c ompound 2 has previously been made with the use of toluenesulfonylchloride and DMAP.…”

Section: Synthesismentioning

confidence: 99%

Gas‐Phase Ion Fluorescence Spectroscopy of Tailor‐made Rhodamine Homo‐ and Heterodyads: Quenching of Electronic Communication by π‐Conjugated Linkers

et al. 2020

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While many key photophysical features are understood for electronic communication between chromophores in neutral compounds, there is limited information on the effect of charges in practically relevant ionic chromo/fluorophores. Here we have chosen positively charged rhodamines and prepared a selection of homo‐ and heterodimers with alkyl or π‐conjugated, acetylenic bridges. Protonated molecules were transferred as isolated ions to gas phase where there is no solvent screening of charges, and fluorescence spectra were measured with a custom‐made ion‐trap setup. Our work reveals strong polarization of the π‐spacer (induced dipole/quadrupole) when it experiences the electric field from one/ two dyes. Hence, π‐spacers provide efficient shielding of charges by reducing the Coulomb interaction, whereas two dye cations polarize each other when connected by an alkyl. The screening influences the Förster resonance energy transfer efficiency that relies on the dipole–dipole interaction.

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“…[30][31][32][33] Rhodamine derivatives have been proved to be an efficient acceptor and are thereby used for FRET-based ratiometric probes for various metal ions. [34][35][36][37] Rhodamine derivatives with a spirolactam (closed) form are colorless and nonfluorescent, whereas those with an open-ring amide form induced by suitable metal ions give rise to a pink color appearing with strong fluorescence. [38][39][40] Monitoring metal ions is critical in the fields of environmental protection and human health.…”

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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

152

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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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Ratio‐Au: A FRET‐based Fluorescent Probe for Ratiometric Determination of Gold Ions and Nanoparticles

Cited by 63 publications

References 36 publications

Sensitive detection of Au(III) using regenerative rhodamine B–functionalized chitosan nanoparticles

Sensitive detection of Au(III) using regenerative rhodamine B–functionalized chitosan nanoparticles

Gas‐Phase Ion Fluorescence Spectroscopy of Tailor‐made Rhodamine Homo‐ and Heterodyads: Quenching of Electronic Communication by π‐Conjugated Linkers

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

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