期刊
NEW JOURNAL OF CHEMISTRY
卷 44, 期 3, 页码 1054-1062出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9nj02583a
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资金
- U.S. Department of Energy (DOE) [DE-AC02-07CH11358]
- Division of Materials Sciences and Engineering of Basic Energy Sciences Program of the Office of Science of the U.S. Department of Energy
- National Science Foundation, NSF [CHE-1465071]
- Swedish Royal Academy of Science through the Goran Gustafsson prize in Chemistry
- Vetenskapsradet [2016-05405]
- Swedish Research Council [2016-05405] Funding Source: Swedish Research Council
Mechanochemical reactions of benzene-1,4-dicarboxylate (BDC2-) and lanthanide carbonates, Ln(2)(CO3)(3)center dot xH(2)O (Ln = Sm, Eu, Gd, Tb) yield phase pure lanthanide coordination polymers, (Ln(0.5)Gd(0.5))(2)(1,4-BDC)(3)(H2O)(4) with Ln = Sm, Eu, Tb, which are isostructural with Tb-2(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.
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