Circularly polarized luminescence of lanthanide(III) complexes with 1-ethylenediamine-N,N′-disuccinic acids

Murata, Kazuyuki; Morita, Makoto; Eguchi, Ken

doi:10.1016/0022-2313(88)90044-0

Cited by 7 publications

(5 citation statements)

References 14 publications

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“… Ligands used for the preparation of CPL‐active samarium complexes. (+)‐hfbc=(+)‐3‐heptafluorobutyrylcamphorate, A=pyridine‐2,6‐dicarboxylic acid bis‐[(1‐naphthalen‐1‐yl‐ethyl)‐amide], B=1‐phenylethylamine substituted 2‐hydroxyisophthalamide, edds=ethylenediamine‐ N , N ′‐disuccinate …”

Section: Introductionmentioning

confidence: 96%

“…The complex of Sm III and the 2‐hydroxyisophthalamide B is the third example of a samarium complex for which g lum values were reported (−0.027 for 4 G 5/2 → 6 H 5/2 and −0.028 for 4 G 5/2 → 6 H 7/2 ) . In the case of the complex consisting of the disuccinate edds and Sm III only for the 4 G 5/2 → 6 H 7/2 transition (which is typically more luminescent) a g lum value (+0.066) could be reported . Interestingly, in two of these four examples, for the 4 G 5/2 → 6 H 5/2 and the 4 G 5/2 → 6 H 7/2 transitions identical g lum values were reported, though according to Richardson's classification one would expect the dissymmetry factor to be considerably higher in the case of the 4 G 5/2 → 6 H 5/2 transition.…”

Section: Introductionmentioning

confidence: 99%

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Circularly Polarised Luminescence in Enantiopure Samarium and Europium Cryptates

Kreidt

Arrico

Zinna

et al. 2018

Chemistry A European J

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Circularly polarised luminescence (CPL) is a chiroptical phenomenon gaining more and more attention, as the availability of the necessary spectrometers is getting better and first applications in bioimaging or for the preparation of OLEDs (organic light emitting diodes) are coming within range. Until now most examples of distinctly CPL-active compounds were europium and terbium complexes though theoretically the electronic structure of samarium should be as suitable as the one of terbium. This discrepancy can be accounted for by the high susceptibility of samarium to non-radiative deactivation processes. The aim of this study was to strategically circumvent this difficulty by the use of a ligand scaffold which has already proven to efficiently suppress these processes, namely the cryptates. The prepared partly deuterated samarium and europium complexes exhibit distinct circularly polarised luminescence with dissymmetry factors up to g =+0.13 (Sm ) or g =-0.19 (Eu ).

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Circularly Polarised Luminescence in Enantiopure Samarium and Europium Cryptates

Kreidt

Arrico

Zinna

et al. 2018

Chemistry A European J

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“…Samarium(III) cryptates containing bipyridine fragments show g lum around 0.13 and a good value of the luminescence emission quantum yield (0.26%) in deuterated MeOH . Finally, it is interesting to note that samarium(III) complexes containing the ethylenediamine backbone show similar g lum values (in the 0.03–0.06 range, around 560 nm) regardless of the chromophoric groups. , The chiroptical performance of our complexes containing the chiral cyclohexanediamine backbone (see the g lum values in Table ) is in line with those recorded for the aforementioned complexes containing similar diamine backbones.…”

Section: Resultsmentioning

confidence: 99%

“…To the best of our knowledge, to date, only a few samarium complexes were described to exhibit CPL in solution. 13 , 20 − 26 In all cases, in order to mitigate the multiphonon relaxation process negatively affecting the luminescence emission efficiency, the donor atoms should not bear any H atoms.…”

Section: Introductionmentioning

confidence: 99%

“…Because of the fact that samarium(III) is more sensitive to the multiphonon relaxation process, its complexes are only weakly luminescent, and for this reason, they have been poorly studied in the past. To the best of our knowledge, to date, only a few samarium complexes were described to exhibit CPL in solution. ,− In all cases, in order to mitigate the multiphonon relaxation process negatively affecting the luminescence emission efficiency, the donor atoms should not bear any H atoms.…”

Section: Introductionmentioning

confidence: 99%

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Effect of the Counterion on Circularly Polarized Luminescence of Europium(III) and Samarium(III) Complexes

et al. 2020

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Each enantiopure europium(III) and samarium(III) nitrate and triflate complex of the ligand L , with L = N , N ′-bis(2-pyridylmethylidene)-1,2-( R , R + S , S )-cyclohexanediamine ([Ln L (tta) 2 ]·NO 3 and [Ln L (tta) 2 (H 2 O)]·CF 3 SO 3 , where tta = 2-thenoyltrifluoroacetylacetonate) has been synthesized and characterized from a spectroscopic point of view, using a chiroptical technique such as electronic circular dichroism (ECD) and circularly polarized luminescence (CPL). In all cases, both ligands are capable of sensitizing the luminescence of both metal ions upon absorption of light around 280 and 350 nm. Despite small differences in the total luminescence (TL) and ECD spectra, the CPL activity of the complexes is strongly influenced by a concurrent effect of the solvent and counterion. This particularly applies to europium(III) complexes where the CPL spectra in acetonitrile can be described as a weighed linear combination of the CPL spectra in dichloromethane and methanol, which show nearly opposite signatures when their ligand stereochemistries are the same. This phenomenon could be related to the presence of equilibria interconverting solvated, anion-coordinated complexes and isomers differing by the relative orientation of the tta ligands. The difference between some bond lengths (M–N bonds, in particular) in the different species could be at the basis of such an unusual CPL activity.

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Excited-state optical activity, 1987-1995

Brittain¹

1996

Chirality

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Circularly polarized luminescence of lanthanide(III) complexes with 1-ethylenediamine-N,N′-disuccinic acids

Cited by 7 publications

References 14 publications

Circularly Polarised Luminescence in Enantiopure Samarium and Europium Cryptates

Circularly Polarised Luminescence in Enantiopure Samarium and Europium Cryptates

Effect of the Counterion on Circularly Polarized Luminescence of Europium(III) and Samarium(III) Complexes

Excited-state optical activity, 1987-1995

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