TY - JOUR
T1 - Structural characterization, magnetic and luminescent properties of praseodymium(III)-4,4,4-trifluoro-1- (2-naphthyl)butane-1,3-dionato(1-) complexes
AU - Mautner, Franz A.
AU - Bierbaumer, Florian
AU - Fischer, Roland C.
AU - Vicente, Ramon
AU - Tubau, Ànnia
AU - Ferran, Arnau
AU - Massoud, Salah S.
N1 - Funding Information:
Funding: This work was supported by Ministerio de Ciencia, Innovación y Universidades (Spain), Project PGC2018‐094031‐B‐100. The APC was funded by Technische Universität Graz.
Funding Information:
This work was supported by Ministerio de Ciencia, Innovaci?n y Universidades (Spain), Project PGC2018-094031-B-100. The APC was funded by Technische Universit?t Graz.
Publisher Copyright:
© 2021 by the authors.
PY - 2021/2
Y1 - 2021/2
N2 - Four new Pr(III) mononuclear complexes of formula [Pr(ntfa)3(MeOH)2] (1), [Pr(ntfa)3(bipy)2] (2), [Pr(ntfa)3(4,4'-Mt2bipy)] (3) and [Pr(ntfa)3(5,5'-Me2bipy)] (4), where ntfa = 4,4,4- trifuoro-1-(naphthalen-2-yl)butane-1,3-dionato(1-), 5,5'-Me2bipy = 5,5'-dimethyl-2,2'-dipyridine, 4,4'-Mt2bipy = 4,4'-dimethoxy-2,2'-dipyridine, have been synthesized and structurally characterized. The complexes display the coordination numbers 8 for 1, 3 and 4, and 10 for 2. Magnetic measurements of complexes 1-4 were consistent with a magnetically uncoupled Pr3+ ion in the 3H4 ground state. The solid state luminescence studies showed that the ancillary chelating bipyridyl ligands in the 2-4 complexes greatly enhance the luminescence emission in the visible and NIR regions through efficient energy transfer from the ligands to the central Pr3+ ion; behaving as “antenna” ligands.
AB - Four new Pr(III) mononuclear complexes of formula [Pr(ntfa)3(MeOH)2] (1), [Pr(ntfa)3(bipy)2] (2), [Pr(ntfa)3(4,4'-Mt2bipy)] (3) and [Pr(ntfa)3(5,5'-Me2bipy)] (4), where ntfa = 4,4,4- trifuoro-1-(naphthalen-2-yl)butane-1,3-dionato(1-), 5,5'-Me2bipy = 5,5'-dimethyl-2,2'-dipyridine, 4,4'-Mt2bipy = 4,4'-dimethoxy-2,2'-dipyridine, have been synthesized and structurally characterized. The complexes display the coordination numbers 8 for 1, 3 and 4, and 10 for 2. Magnetic measurements of complexes 1-4 were consistent with a magnetically uncoupled Pr3+ ion in the 3H4 ground state. The solid state luminescence studies showed that the ancillary chelating bipyridyl ligands in the 2-4 complexes greatly enhance the luminescence emission in the visible and NIR regions through efficient energy transfer from the ligands to the central Pr3+ ion; behaving as “antenna” ligands.
KW - Antenna effect
KW - Beta-diketonate anion
KW - Crystal structure
KW - Luminescence
KW - Magnetic properties
KW - Praseodymium(III)
UR - http://www.scopus.com/inward/record.url?scp=85101573647&partnerID=8YFLogxK
U2 - 10.3390/cryst11020179
DO - 10.3390/cryst11020179
M3 - Article
AN - SCOPUS:85101573647
SN - 2073-4352
VL - 11
SP - 1
EP - 15
JO - Crystals
JF - Crystals
IS - 2
M1 - 179
ER -