Interatomic-distance dependence of resonant energy-transfer phenomena

Grüll, F.; Voitkiv, A. B.; Müller, Carsten

doi:10.1103/physrevresearch.2.033303

Cited by 4 publications

(1 citation statement)

References 45 publications

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“…This may corroborate what was postulated in a previous work [ 16 ]: (i) there is preferential Phen-to-Eu(III) energy transfer; (ii) there is certain non-reversible Tb(III)-to-Eu(III) energy transfer. Indeed, the latter effect is limited by the presence of ligands between lanthanide ions, as the strength of energy transfer phenomena is strongly reduced with increasing interatomic distance [ 32 ]. However, as depicted in Figure 1 , they may not be completely coordinated with PSA and Phen.…”

Section: Discussionmentioning

confidence: 99%

Luminescent Papers with Asymmetric Complexes of Eu(III) and Tb(III) in Polymeric Matrices and Suggested Combinations for Color Tuning

Aguado,

Gomes,

Durães

et al. 2023

Molecules

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Complexes of lanthanide ions, such as Eu(III) (red light emission) and Tb(III) (green light emission), with proper ligands can be highly luminescent and color-tunable, also attaining yellow and orange emission under UV radiation. The ligands employed in this work were poly(sodium acrylate), working as polymeric matrix, and 1,10-phenanthroline, taking advantage of its antenna effect. Possibilities of color display were further enhanced by incorporating a cationic polyfluorene with blue emission. This strategy allowed for obtaining cyan and magenta, besides the aforementioned colors. Uncoated cellulose paper was impregnated with the resulting luminescent inks, observing a strong hypsochromic shift in excitation wavelength upon drying. Hence, while a cheap UV-A lamp sufficed to reveal the polyfluorene’s blue emission, shorter wavelengths were necessary to visualize the emission due to lanthanide ions as well. The capacity to reveal, with UV-C radiation, a full-color image that remains invisible under natural light is undoubtedly useful for anti-counterfeiting applications. Furthermore, both lanthanide ion complexes and polyfluorenes were shown to have their luminescence quenched by Cu(II) ions and nitroarenes, respectively.

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Section: Discussionmentioning

confidence: 99%

Luminescent Papers with Asymmetric Complexes of Eu(III) and Tb(III) in Polymeric Matrices and Suggested Combinations for Color Tuning

Aguado,

Gomes,

Durães

et al. 2023

Molecules

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Relevance of dissociative molecular states for resonant two-center photoionization of heteroatomic dimers

Grüll

Voitkiv

Müller

2022

J. Phys. B: At. Mol. Opt. Phys.

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Photoionization of a weakly bound van-der-Waals dimer, composed of two atomic species A and B, is studied theoretically. Atom A can be ionized either directly or via an indirect two-center channel, where atom B is ﬁrst resonantly photoexcited and, afterwards, transfers the excitation energy via long-range electron-electron correlations radiationlessly to atom A, causing its ionization. By taking the vibrational nuclear motion of the dimer during the process into account, we analyze the contributions to the photoionization cross section from bound and dissociative molecular states in the ﬁnal A+–B system. For the speciﬁc example of a LiHe dimer we show (i) that substantial contributions to both ionization mechanisms result from dissociative Li++ He states and (ii) that the two-center pathway strongly dominates over the direct photoionization channel for photon energies close to one of the molecular LiHe resonances.

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