Comparison of the Electronic and Vibrational Optical Activity of a Europium(III) Complex

Wu, Tao; Hudecová, Jana; You, Xiao-Zeng; Urbanová, Marie; Bouř, Petr

doi:10.1002/chem.201406266

Cited by 15 publications

(17 citation statements)

References 52 publications

(60 reference statements)

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“…In addition, the usually positive 5 D 0 → 7 F 0 band (1550 cm −1 ) is negative for β‐ and γ‐CD. The 2043 cm −1 band also gives the largest CID ( CID =( I R − I L )/( I R + I L ), where I R and I L are intensities of the right‐ and left circularly‐polarized light, respectively) of −2.2×10 −2 (Table S2), very close to a similar value (1.7×10 −2 ) previously found for an inherently chiral bipyridine‐Eu III complex . This suggests a stable, rigid geometry of the resultant β‐CD and EuEDTA associate.…”

Section: Resultssupporting

confidence: 81%

“…The biggerr ings of band g-CDs give larger CPL, where the EuEDTAp robe is extreme,w ith as ignal of about two orders (! [18] This suggestsastable, rigid geometry of the resultant b-CD and EuEDTAa ssociate. For b-CD, we can see three 5 D 0 !…”

Section: Resultsmentioning

confidence: 99%

“…The 2043 cm À1 band also gives the largest CID (CID = (I R ÀI L )/(I R + I L ), where I R and I L are intensities of the rightand left circularly-polarized light,r espectively)o fÀ2.2 10 À2 (Table S2), very closet oasimilarv alue (1.7 10 À2 )p reviously found for an inherently chiral bipyridine-Eu III complex. [18] This suggestsastable, rigid geometry of the resultant b-CD and EuEDTAa ssociate. Outside the displayed region weaker bands at 619, 659, and 685 cm À1 assignable to the 5 D 1 !…”

Section: Resultsmentioning

confidence: 99%

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Recognition of Oligosaccharides by Chirality Induced in Europium (III) Compounds

Kessler

Kaminský

et al. 2018

Chem. Asian J.

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Identificationo fs accharides is difficult due to their similar chemical structure. However,t hey interact very selectively with lanthanide probes. To explore the potential for saccharide recognition, we compare circularly polarized luminescence induced by av ariety of oligo-and polysaccharides in three europium compounds. Measurement on a standard Ramano pticala ctivity spectrometer made it possible to use high excitation powers and provided very distinct spectralp atterns,w hich were sensitive both to the local structure and differences in molecular size. For example, a-, b-a nd g-cyclodextrins provided unique spectroscopic responses.T itration data and molecular dynamics simulation confirmed that CPL spectra carry information about the bindingm ode and strength between the lanthanide probe and saccharide skeleton.[a] Dr.

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Section: Resultssupporting

confidence: 81%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Recognition of Oligosaccharides by Chirality Induced in Europium (III) Compounds

Kessler

Kaminský

et al. 2018

Chem. Asian J.

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“…13 This luminescence appears at 1989 cm −1 in the Raman spectrum, resulting in CID=0.71 for the Λ enantiomer. As typical for similar europium complexes,10–12 the Raman signal is dominated by europium fluorescent transitions at 1722 and 1989 cm −1 . Pure vibrational Raman spectrum of the ligand (Supporting Information, Figure S2) is not visible in the scale of Figure 2.…”

Section: Observed Luminescence Bands In the Raman δ‐Cseu[(+)‐hfbc]4 Ssupporting

confidence: 63%

“…The CPL component in scattered radiation was previously proposed for sensitive chirality detection of optically active alcohols and ketones chelated with an achiral Eu(fod) 3 complex, although the phenomenon was rather incorrectly referred to as induced resonance ROA (IRROA) 11. Recently, we also reported a comparative study of electronic and vibrational optical activity in a chiral bipyridine Eu III complex,12 where a very high CID of approximately 10 −2 was observed in its ROA spectrum.…”

Section: Observed Luminescence Bands In the Raman δ‐Cseu[(+)‐hfbc]4 Smentioning

confidence: 99%

Detection of Circularly Polarized Luminescence of a Cs‐Eu ^III Complex in Raman Optical Activity Experiments

Kapitán

Mašek

et al. 2015

Angew. Chem.

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Circularly polarized luminescence (CPL) spectra are extremely sensitive to molecular structure. However, conventional CPL measurements are difficult and require expensive instrumentation. As an alternative, we explore CPL using Raman scattering and Raman optical activity (ROA) spectroscopy. The cesium tetrakis(3‐heptafluoro‐butylryl‐(+)‐camphorato) europium(III) complex was chosen as a model as it is known to exhibit very large CPL dissymmetry ratio. The fluorescent bands could be discriminated from true Raman signals by comparison of spectra acquired with different laser excitation wavelengths. Furthermore, the ROA technique enables fluorescence identification by measuring the degree of circularity. The CPL dissymmetry ratio was measured as the ROA circular intensity difference of 0.71, the largest one ever reported. The alternative CPL measurement enhances applications of lanthanides in analytical chemistry and chemical imaging of biological objects.

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Comparison of the Electronic and Vibrational Optical Activity of a Europium(III) Complex

Cited by 15 publications

References 52 publications

Recognition of Oligosaccharides by Chirality Induced in Europium (III) Compounds

Recognition of Oligosaccharides by Chirality Induced in Europium (III) Compounds

Detection of Circularly Polarized Luminescence of a Cs‐Eu ^III Complex in Raman Optical Activity Experiments

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Comparison of the Electronic and Vibrational Optical Activity of a Europium(III) Complex

Cited by 15 publications

References 52 publications

Recognition of Oligosaccharides by Chirality Induced in Europium (III) Compounds

Recognition of Oligosaccharides by Chirality Induced in Europium (III) Compounds

Detection of Circularly Polarized Luminescence of a Cs‐Eu III Complex in Raman Optical Activity Experiments

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Detection of Circularly Polarized Luminescence of a Cs‐Eu ^III Complex in Raman Optical Activity Experiments