Photophysical Processes for Phenanthroline-Menthol Ligand and Its Eu(III) and Tb(III) Complexes in Solution | Sciact - CRIS-system of Boreskov Institute of Catalysis

Photophysical Processes for Phenanthroline-Menthol Ligand and Its Eu(III) and Tb(III) Complexes in Solution Full article

Journal

Journal of Luminescence
ISSN: 0022-2313

Output data

Year: 2019, Volume: 214, Article number : 116548, Pages count : 8 DOI: 10.1016/j.jlumin.2019.116548

Tags

Chiral substituted phenanthroline; Complexes; Laser flash photolysis; Photophysical processes for free ligand and eu(III) and tb(III) complexes; Quantum-chemical calculations; Timeresolved luminescence

Authors

Plyusnin Victor F. ^1,2 , Mikheylis Aleksandr V. ¹ , Kupryakov Arkady S. ¹ , Shubin Aleksandr A. ^2,3 , Grivin Vyacheslav P. ^1,2 , Bryleva Julia A. ⁴ , Larionov Stanislav V. ⁴

Affiliations

1	Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, Novosibirsk, 630090, Russian Federation
2	Novosibirsk State University, Novosibirsk, 630090, Russian Federation
3	Boreskov Institute of Catalysis SB RAS, Novosibirsk, 630090, Russian Federation
4	Nikolaev Institute of Inorganic Chemistry SB RAS, Novosibirsk, 630090, Russian Federation

Funding (1)

Russian Science Foundation

18-13-00246

Time resolved luminescence, nanosecond laser flash photolysis, and quantum chemical calculations were used to study the photophysical processes for new chiral ligand (L) containing phenanthroline (Phen) and menthol moiety and EuL2(NO3)3 and TbL2(NO3)3 complexes. The absorption and luminescence spectra of free L in acetonitrile are shifted to the red at 10 nm with respect to Phen. The lifetime and quantum yield of luminescence of L are significantly increased (τ = 2.5 ns φf = 0.059) as compared with Phen (τ = 0.51 ns φf = 0.0087 [1]). As a result of intersystem crossing (ISC) ligand L goes to the triplet state (quantum yield φT = 0.092). The triplet-triplet absorption spectrum of L is a broad band with maximum at 450 nm. The protonation of L leads to the appearance of LH+ form which has a broad luminescence band with a maximum at 482 nm and a lifetime of 38 ns. The EuL2(NO3)3 complex exists in solution at a high concentration and exhibits a characteristic red luminescence. However, as the concentration of EuL2(NO3)3 decreases, the complex dissociates and the bands of free L ligand and protonated LH+ form appear in the absorption and luminescence spectra. Quantum-chemical calculations allow to calculate the geometry and absorption spectra of free and protonated ligands and EuL2(NO3)3 complex. © 2019 Elsevier B.V.

Plyusnin V.F. , Mikheylis A.V. , Kupryakov A.S. , Shubin A.A. , Grivin V.P. , Bryleva J.A. , Larionov S.V.
Photophysical Processes for Phenanthroline-Menthol Ligand and Its Eu(III) and Tb(III) Complexes in Solution
Journal of Luminescence. 2019. V.214. 116548 :1-8. DOI: 10.1016/j.jlumin.2019.116548 WOS Scopus РИНЦ AN OpenAlex

Submitted:	Apr 16, 2019
Accepted:	Jun 10, 2019
Published online:	Jun 13, 2019
Published print:	Oct 1, 2019

Web of science:	WOS:000483151600030
Scopus:	2-s2.0-85067487213
Elibrary:	41695346
Chemical Abstracts:	2019:1208748
OpenAlex:	W2953162626

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