TY - JOUR

T1 - 2D polymeric lanthanide(III) compounds based on novel bright green emitting enaminone ligand

AU - Smirnova, K. S.

AU - Ivanova, E. A.

AU - Pozdnyakov, I. P.

AU - Russkikh, A. A.

AU - Eltsov, I. V.

AU - Dotsenko, V. V.

AU - Lider, E. V.

N1 - Funding Information: This work was supported by the Russian Science Foundation (Project №20-73-10207). The research was supported by the Ministry of Science and Higher Education of the Russian Federation, №121031700321-3 (Nikolaev Institute of Inorganic Chemistry SB RAS). The authors thank Anna P. Zubareva and Natalia N. Komardina for the elemental analysis, Anastasia O. Matveeva for the X-ray phase analysis data, Taisiya S. Sukhikh and Vladislav Yu. Komarov for providing the data collected in XRD Facility of NIIC SB RAS, Marianna I. Rakhmanova for phosphorescence measurements. Publisher Copyright: © 2022 Elsevier B.V.

PY - 2022/11/1

Y1 - 2022/11/1

N2 - New enaminone derivative, 2-{[(4-methoxyphenyl)amino]methylene}-5,5-dimethyl-cyclohexane-1,3-dione (HL), and lanthanide(III) compounds based on it [Ln(HL)2(NO3)3]n, (where Ln3+=Eu (1Eu), Sm (2Sm), Tb (3 Tb) and Dy (4Dy)) have been synthesized. The complexes have been fully characterized by spectroscopic and analytical methods including single crystal X-ray structure. To establish closer intermolecular contacts and HOMO/LUMO energy, the Hirshfeld surface analysis, as well as DFT calculations has been carried out. According to single-crystal X-ray diffraction analysis ligand exhibits bidentate-bridging mode. This leads to the formation of polymeric structure as layer, arranged parallel to ab crystallographic plane. The lanthanide polyhedron is close to bicapped square antiprism. All obtained compounds are isomorphous to each other. The study of photoluminescence showed the presence of a bright green emission of the ligand with a quantum yield of 41 %. The weak sensitization occurs only in case of europium(III) complex leading to apparent luminescence quantum yield of 0.021 %, with ∼4 % sensitization efficiency. Emission spectra of other compounds are the same to the ligand one.

AB - New enaminone derivative, 2-{[(4-methoxyphenyl)amino]methylene}-5,5-dimethyl-cyclohexane-1,3-dione (HL), and lanthanide(III) compounds based on it [Ln(HL)2(NO3)3]n, (where Ln3+=Eu (1Eu), Sm (2Sm), Tb (3 Tb) and Dy (4Dy)) have been synthesized. The complexes have been fully characterized by spectroscopic and analytical methods including single crystal X-ray structure. To establish closer intermolecular contacts and HOMO/LUMO energy, the Hirshfeld surface analysis, as well as DFT calculations has been carried out. According to single-crystal X-ray diffraction analysis ligand exhibits bidentate-bridging mode. This leads to the formation of polymeric structure as layer, arranged parallel to ab crystallographic plane. The lanthanide polyhedron is close to bicapped square antiprism. All obtained compounds are isomorphous to each other. The study of photoluminescence showed the presence of a bright green emission of the ligand with a quantum yield of 41 %. The weak sensitization occurs only in case of europium(III) complex leading to apparent luminescence quantum yield of 0.021 %, with ∼4 % sensitization efficiency. Emission spectra of other compounds are the same to the ligand one.

KW - Enaminone

KW - Hirshfeld surface

KW - Lanthanide(III) complexes

KW - Layered structure

KW - Photoluminescence

UR - http://www.scopus.com/inward/record.url?scp=85135398924&partnerID=8YFLogxK

U2 - 10.1016/j.ica.2022.121107

DO - 10.1016/j.ica.2022.121107

M3 - Article

AN - SCOPUS:85135398924

VL - 542

JO - Inorganica Chimica Acta

JF - Inorganica Chimica Acta

SN - 0020-1693

M1 - 121107

ER -