TY - JOUR
T1 - Diverse coordination numbers and geometries in pyridyl adducts of lanthanide(Iii) complexes based on β-diketonate
AU - Mautner, Franz A.
AU - Bierbaumer, Florian
AU - Fischer, Roland C.
AU - Torvisco, Ana
AU - Vicente, Ramon
AU - Font-Bardía, Mercè
AU - Tubau, Ànnia
AU - Speed, Saskia
AU - Massoud, Salah S.
N1 - Funding Information:
Acknowledgments: R.V., Á.T. and S.S. acknowledge the financial support from Ministerio de Ciencia, Innovación y Universidades (Spain), Project PGC2018-094031-B-100.
Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2021/10
Y1 - 2021/10
N2 - Ten mononuclear rare earth complexes of formula [La(btfa)3 (H2 O)2 ] (1), [La(btfa)3 (4,4′-Mt2 bipy)] (2), [La(btfa)3 (4,4′-Me2 bipy)2 ] (3), [La(btfa)3 (5,5′-Me2 bipy)2 ] (4), [La(btfa)3 (terpy)] (5), [La(btfa)3 (phen)(EtOH)] (6), [La(btfa)3 (4,4′-Me2 bipy)(EtOH)] (7), [La(btfa)3 (2-benzpy)(MeOH)] (8), [Tb(btfa)3 (4,4′-Me2 bipy)] (9) and (Hpy)[Eu(btfa)4 ] (10), where btfa = 4,4,4-trifuoro-1-phenylbutane-1,3-dionato anion, 4,4′-Mt2 bipy = 4,4′-dimethoxy-2,2′-bipyridine, 4,4′-Me2 bipy = 4,4′-dimethyl-2,2′-bipyridine, 5,5′-Me2 bipy = 5,5′-dimethyl-2,2′-bipyridine, terpy = 2,2′:6′,2′-terpyridine, phen = 1,10-phenathroline, 2-benzpy = 2-(2-pyridyl)benzimidazole, Hpy = pyridiniumH+ cation) have been synthesized and structurally characterized. The complexes display coordination numbers (CN) eight for 1, 2, 9, 10, nine for 5, 6, 7, 8 and ten for 3 and 4. The solid-state luminescence spectra of Tb-9 and Eu-10 complexes showed the same characteristic bands predicted from the Tb(III) and Eu(III) ions. The Overall Quantum Yield measured (φTOT) at the excitation wavelength of 371 nm for both compounds yielded 1.04% for 9 and up to 34.56% for 10.
AB - Ten mononuclear rare earth complexes of formula [La(btfa)3 (H2 O)2 ] (1), [La(btfa)3 (4,4′-Mt2 bipy)] (2), [La(btfa)3 (4,4′-Me2 bipy)2 ] (3), [La(btfa)3 (5,5′-Me2 bipy)2 ] (4), [La(btfa)3 (terpy)] (5), [La(btfa)3 (phen)(EtOH)] (6), [La(btfa)3 (4,4′-Me2 bipy)(EtOH)] (7), [La(btfa)3 (2-benzpy)(MeOH)] (8), [Tb(btfa)3 (4,4′-Me2 bipy)] (9) and (Hpy)[Eu(btfa)4 ] (10), where btfa = 4,4,4-trifuoro-1-phenylbutane-1,3-dionato anion, 4,4′-Mt2 bipy = 4,4′-dimethoxy-2,2′-bipyridine, 4,4′-Me2 bipy = 4,4′-dimethyl-2,2′-bipyridine, 5,5′-Me2 bipy = 5,5′-dimethyl-2,2′-bipyridine, terpy = 2,2′:6′,2′-terpyridine, phen = 1,10-phenathroline, 2-benzpy = 2-(2-pyridyl)benzimidazole, Hpy = pyridiniumH+ cation) have been synthesized and structurally characterized. The complexes display coordination numbers (CN) eight for 1, 2, 9, 10, nine for 5, 6, 7, 8 and ten for 3 and 4. The solid-state luminescence spectra of Tb-9 and Eu-10 complexes showed the same characteristic bands predicted from the Tb(III) and Eu(III) ions. The Overall Quantum Yield measured (φTOT) at the excitation wavelength of 371 nm for both compounds yielded 1.04% for 9 and up to 34.56% for 10.
KW - Crystal structure
KW - Europium(III)
KW - Lanthanum(III)
KW - Luminescence
KW - Terbium(III)
KW - β-diketonate anion
UR - http://www.scopus.com/inward/record.url?scp=85116606203&partnerID=8YFLogxK
U2 - 10.3390/inorganics9100074
DO - 10.3390/inorganics9100074
M3 - Article
AN - SCOPUS:85116606203
SN - 2304-6740
VL - 9
JO - Inorganics
JF - Inorganics
IS - 10
M1 - 74
ER -