Fluorescence quenching of tryptophan by trivalent lanthanide ions in aqueous media

Gaye-Seye, Mame Diabou; Aaron, Jean‐Jacques

doi:10.1002/(sici)1099-0801(199904)13:2<171::aid-bmc869>3.0.co;2-s

Cited by 5 publications

(3 citation statements)

References 11 publications

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“…This particular behaviour of Eu 3+ has been also noted in the case of the fluorescence quenching of tryptophan [42] and of indole derivatives, in which Eu 3+ was reported to produce a dynamic quenching, and to be a much more efficient quencher than the other lanthanides [41,44]. It might be attributed to the fact that, contrary to the other lanthanide ions under study, Eu 3+ possesses the electronic configuration [Xe] 4f 6 with an unstable 4f 6 orbital [41,44].…”

Section: Fluorescence Quenching Behaviour Of Deccacontrasting

confidence: 99%

“…A complex mechanism, including an induced intersystem crossing (ISC) step, attributed to paramagnetic and external heavy atom effects, brought about by the lanthanide ions, was proposed to explain the non-linear relationships observed for the fluorescence quenching of tryptophan by these lanthanide ions [40]. However, the later results are in contrast with our findings concerning the fluorescence quenching behaviour by lanthanide trivalent ions of indoles in DMSO [41] and of tryptophan in pH-controlled aqueous media [42], for which strictly linear Stern-Volmer relationships have been found, indicating the presence of purely dynamic quenching. This shows the important effects of the molecular and electronic structure of the interacting organic compounds and of the solvent on the type of quenching.…”

Section: Quenching Effects Of Ln 3+ Ions On the Cca And Decca Fluoresmentioning

confidence: 99%

See 1 more Smart Citation

Fluorescence Quenching of Two Coumarin-3-carboxylic Acids by Trivalent Lanthanide Ions

Cissé¹,

Djandé²,

Capo‐Chichi³

et al. 2016

J Fluoresc

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The effects of various trivalent lanthanide ions (acetates of Ce, Er, Eu, Nd) on the electronic absorption and fluorescence spectra of un-substituted coumarin-3-carboxylic acid (CCA) and 7-N,N-diethylamino-coumarin-3-carboxylic acid (DECCA) have been investigated in dimethylsulfoxide (DMSO) at room temperature. Depending on the lanthanide ion nature and concentration, significant spectral changes of absorption bands occurred for both coumarin derivatives. These spectral changes were attributed to the formation of ground-state complexes between the coumarin carboxylate derivatives and lanthanide ions. The fluorescence quenching of CCA and DECCA upon increasing the lanthanide ion concentration was studied. Different quantitative treatments, including the Stern-Volmer equation, the Perrin equation and a polynomial equation, were applied and compared in order to determine the nature of the quenching mechanisms for both coumarin derivatives. The results suggested the contribution of both dynamic and static quenching. Significant differences of CCA and DECCA fluorescence quenching efficiency were also observed, depending on the lanthanide ion. DECCA fluorescence lifetime measurements, performed in the absence and in the presence of Ln, confirmed a contribution of static quenching.

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Section: Fluorescence Quenching Behaviour Of Deccacontrasting

confidence: 99%

Section: Quenching Effects Of Ln 3+ Ions On the Cca And Decca Fluoresmentioning

confidence: 99%

Fluorescence Quenching of Two Coumarin-3-carboxylic Acids by Trivalent Lanthanide Ions

Cissé¹,

Djandé²,

Capo‐Chichi³

et al. 2016

J Fluoresc

View full text Add to dashboard Cite

show abstract

“…The fluorescence quenching capacity of ZIF-8 is resulted from the stacking π-electron interactions of the bridging imidazolate ring and from the zinc ions. Exchanging zinc ions or doping with other transition metal ions, which can effectively suppress fluorescence intensity by static quenching, will be potentially enhance the fluorescence quenching capacity of ZIF-8. , We have found that the trivalent lanthanide ions in NMOFs can be used as quencher for fluorescent DNA ratiometric sensing . Therefore, in this study, lanthanide ions (Ln 3+ ) were employed to be doped in ZIF-8 nanoparticles.…”

Section: Results and Discussionmentioning

confidence: 99%

Regulating Fluorescent Aptamer-Sensing Behavior of Zeolitic Imidazolate Framework (ZIF-8) Platform via Lanthanide Ion Doping

Hao

Shao

Chen

et al. 2019

ACS Appl. Mater. Interfaces

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Nanoscale metal−organic frameworks (NMOFs) have been proved to be effective quenching platforms for fluorescent detection of DNA via fluorophorequencher pairs. Zeolitic imidazolate framework-8 (ZIF-8) is one type of the most promising NMOFs because of its excellent biocompatibility and easy preparation. However, ZIF-8 is rarely used as platforms for fluorescence sensing of DNA because of its bad fluorescence quenching property. In this study, lanthanide ions were doped into ZIF-8 to regulate its fluorescence quenching behavior. The La 3+ doped ZIF-8 (ZIF-8-La) showed the best quenching efficiency on dyelabeled DNA. The signal-to-background ratio was around 3 times higher than ZIF-8. Furthermore, a core−shell La 3+ -doped ZIF-8 (CS-ZIF-8-La) was designed to modify more La 3+ on the surface of ZIF-8. Compared with ZIF-8-La, the CS-ZIF-8-La exhibited the same fluorescence sensing behavior toward positivedye-labeled DNA, but showed completely contrary quenching property on the negative-dye-labeled DNA. On the basis of this phenomenon, CS-ZIF-8-La was successfully used as quenching platform for designing a ratiometric sensor for DNA and microRNA.

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The inner filter effects and their correction in fluorescence spectra of salt marsh humic matter

Mendonça

Rocha

Duarte

et al. 2013

Analytica Chimica Acta

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Fluorescence quenching of tryptophan by trivalent lanthanide ions in aqueous media

Cited by 5 publications

References 11 publications

Fluorescence Quenching of Two Coumarin-3-carboxylic Acids by Trivalent Lanthanide Ions

Fluorescence Quenching of Two Coumarin-3-carboxylic Acids by Trivalent Lanthanide Ions

Regulating Fluorescent Aptamer-Sensing Behavior of Zeolitic Imidazolate Framework (ZIF-8) Platform via Lanthanide Ion Doping

The inner filter effects and their correction in fluorescence spectra of salt marsh humic matter

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