This article is cited in 5 papers

Communications

Phenyl substitution as an effective way to control the luminescent properties of polyphenylcyclopentadienyl lanthanide complexes

L. N. Puntus^ab, D. A. Bardonov^ac, E. A. Varaksina^ad, I. V. Taidakov^ad, D. M. Roitershtein^ae, I. E. Nifant'ev^af, K. A. Lyssenko<sup>fg

a</sup> A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Moscow, Russian Federation
^b V.A. Kotelnikov Institute of Radioengineering and Electronics, Russian Academy of Sciences, Fryazino, Moscow Region, Russian Federation
^c National Research University Higher School of Economics (HSE University), Moscow, Russian Federation
^d P.N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russian Federation
^e N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, Russian Federation
^f Department of Chemistry, M.V. Lomonosov Moscow State University, Moscow, Russian Federation
^g G.V. Plekhanov Russian University of Economics, Moscow, Russian Federation

Abstract: Lanthanide complexes $\mathrm{[Cp^{X}LnCl_2(Me_3{tach})]_n}$ ($\mathrm{Ln}$ = $\mathrm{Tb}$, $\mathrm{Gd}$; $\mathrm{Cp^X}$ = $\mathrm{Cp}$, $\mathrm{Cp^{Ph_4}}$; $\mathrm{Me_3tach}$ = 1,3,5-trimethyl-1,3,5-triazacyclohexane; $n = 1, 2$), containing cyclopentadienyl ($\mathrm{Cp}$), 1,3-diphenylcyclopentadienyl ($\mathrm{Cp^{Ph_2}}$) and tetraphenyl-cyclopentadienyl ($\mathrm{Cp^{Ph_4}}$) anions as $\pi$-bonded antenna ligands, have been synthesized. A combined analysis of quantum chemical, optical and X-ray diffraction data has shown that the introduction of phenyl groups into the Cp ring leads to the inevitable appearance of intraligand charge transfer states due to the nonequivalence of the phenyl rings.

Keywords: lanthanide ions, luminescence, crystal structure, charge transfer state, cyclopentadienyl ligand.

Language: English

DOI: 10.1016/j.mencom.2024.04.005

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