Publication Date
2-21-2020
Department
Ames Laboratory; Materials Science and Engineering
Campus Units
Ames Laboratory, Materials Science and Engineering
OSTI ID+
1580297
Report Number
IS-J 10145
DOI
10.1039/C9NJ02583A
Journal Title
New Journal of Chemistry
Volume Number
44
Issue Number
3
First Page
1054
Last Page
1062
Abstract
Mechanochemical reactions of benzene-1,4-dicarboxylate (BDC2−) and lanthanide carbonates, Ln2(CO3)3·xH2O (Ln = Sm, Eu, Gd, Tb) yield phase pure lanthanide coordination polymers, (Ln0.5Gd0.5)2(1,4-BDC)3(H2O)4 with Ln = Sm, Eu, Tb, which are isostructural with Tb2(1,4-BDC)3(H2O)4 as confirmed by powder X-ray diffraction and vibrational spectroscopy. Upon excitation with UV light all three compounds display strong emissions, characteristic for the respective optically active lanthanide ion, namely, red for Eu3+, green for Tb3+ and orange-red for Sm3+. In case of the Tb3+-containing compound, the energy difference between the triplet energy level of benzene-1,4-dicarboxylate ligand (BDC2−) allows for the most efficient BDC2−–Tb3+ energy transfer. As a consequence, an intense green luminescence with rather long lifetime (0.81 ms) and high quantum yield (22%) is observed after allowed excitation of the BDC2− ligand. The compounds are paramagnetic with no onset of long range magnetic ordering down to liquid He temperatures.
DOE Contract Number(s)
CHE-1465071; Goeran Gustafsson prize; 2016-05405; AC02-07CH11358
Language
en
Department of Energy Subject Categories
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Publisher
Iowa State University Digital Repository, Ames IA (United States)
