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Dinuclear Ln III Complexes with 9‐Anthracenecarboxylate Showing Field‐Induced SMM and Visible/NIR Luminescence
Author(s) -
Casanovas Berta,
Speed Saskia,
Maury Olivier,
El Fallah Mohamed Salah,
FontBardía Mercè,
Vicente Ramon
Publication year - 2018
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201800624
Subject(s) - luminescence , antiferromagnetism , chemistry , lanthanide , molecule , solid state , analytical chemistry (journal) , crystallography , atmospheric temperature range , materials science , ion , condensed matter physics , physics , optoelectronics , organic chemistry , chromatography , meteorology
The reaction of several Ln(NO 3 ) 3 · 6H 2 O salts with 9‐anthracenecarboxylic acid (9‐HAC) and 2,2′‐bipyridine (bpy) in a mixture of CH 3 OH/H 2 O has allowed the isolation of the dinuclear compounds 1 – 6 with formula [Ln 2 (µ 2 –9‐AC) 4 (9‐AC) 2 (bpy) 2 ] [Ln III = Nd ( 1 ), Eu ( 2 ), Gd ( 3 ), Tb ( 4 ), Er ( 5 ), and Yb ( 6 )]. The molar magnetic susceptibility measurements of 1 – 6 in the 2–300 K temperature range indicate weak antiferromagnetic exchange for the isotropic Gd III compound 3 . Compounds 1 , 5 , and 6 exhibit field‐induced single‐molecule magnet (SMM) behavior. The luminescence properties of compounds 1 – 6 in the solid state have been studied at different temperatures and show sensitization of the 4f–4f emission bands in the NIR range for compounds 1 , 5 , and 6 .