TY - GEN
T1 - Luminescent single-ion magnets from Lanthanoid(III) complexes with monodentate ketone ligands
AU - Kanetomo, Takuya
AU - Ishida, Takayuki
N1 - Publisher Copyright:
© 2016 AIP Publishing LLC.
PY - 2016/2/1
Y1 - 2016/2/1
N2 - We synthesized [LnIII(hfac)3(H2O)(L)] (abbreviated as Ln-L; Ln = Gd, Tb, Eu; L = DTBK (di-t-butyl ketone), BP (benzophenone)), in which the carbonyl oxygen atom was coordinated to the Ln ion center, despite of such bulky substituents. Their crystal structures were determined by means of X-ray diffraction study. Gd-DTBK is completely isomorphous to the di-t-butyl nitroxide derivative and accordingly can be regarded as a model with the ligand spin masked. The ac magnetic susceptibility measurements on Tb-DTBK and -BP showed frequency dependence, characteristic of single-ion magnets. They also displayed photoluminescence in the solid state at room temperature. The quantum yields of the luminescence of Tb-DTBK and -BP (λex = 360 nm) were improved to 57 and 35%, respectively, from that of the starting material [TbIIII(hfac)3(H2O)2] (28% at λex = 370 nm). Similarly, the quantum yields for Eu-DTBK and -BP were 8 and 15%, respectively, with λex = 400 nm, while that of the starting material [EuIIII(hfac)3(H2O)2] was 4% at λex=400 nm.
AB - We synthesized [LnIII(hfac)3(H2O)(L)] (abbreviated as Ln-L; Ln = Gd, Tb, Eu; L = DTBK (di-t-butyl ketone), BP (benzophenone)), in which the carbonyl oxygen atom was coordinated to the Ln ion center, despite of such bulky substituents. Their crystal structures were determined by means of X-ray diffraction study. Gd-DTBK is completely isomorphous to the di-t-butyl nitroxide derivative and accordingly can be regarded as a model with the ligand spin masked. The ac magnetic susceptibility measurements on Tb-DTBK and -BP showed frequency dependence, characteristic of single-ion magnets. They also displayed photoluminescence in the solid state at room temperature. The quantum yields of the luminescence of Tb-DTBK and -BP (λex = 360 nm) were improved to 57 and 35%, respectively, from that of the starting material [TbIIII(hfac)3(H2O)2] (28% at λex = 370 nm). Similarly, the quantum yields for Eu-DTBK and -BP were 8 and 15%, respectively, with λex = 400 nm, while that of the starting material [EuIIII(hfac)3(H2O)2] was 4% at λex=400 nm.
UR - http://www.scopus.com/inward/record.url?scp=84984573574&partnerID=8YFLogxK
U2 - 10.1063/1.4941214
DO - 10.1063/1.4941214
M3 - Conference contribution
AN - SCOPUS:84984573574
T3 - AIP Conference Proceedings
BT - Irago Conference 2015
A2 - Sandhu, Adarsh
A2 - Sandhu, Adarsh
A2 - Okada, Hiroshi
PB - American Institute of Physics Inc.
T2 - Irago Conference 2015: 360 Degree Outlook on Critical Scientific and Technological Challenges for a Sustainable Society
Y2 - 22 October 2015 through 23 October 2015
ER -