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Mechanochemical synthesis, luminescent and magnetic properties of lanthanide benzene-1,4-dicarboxylate coordination polymers (Ln(0.5)Gd(0.5))(2) (1,4-BDC)(3)(H2O)(4); Ln = Sm, Eu, Tb
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Number of Authors: 92020 (English)In: New Journal of Chemistry, ISSN 1144-0546, E-ISSN 1369-9261, Vol. 44, no 3, p. 1054-1062Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2020. Vol. 44, no 3, p. 1054-1062
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Chemical Sciences
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URN: urn:nbn:se:su:diva-179621DOI: 10.1039/c9nj02583aISI: 000509327200044OAI: oai:DiVA.org:su-179621DiVA, id: diva2:1414781
Available from: 2020-03-16 Created: 2020-03-16 Last updated: 2020-03-16Bibliographically approved

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Biswas, AnisZhou, LinPecharsky, Vitalij K.Mudring, Anja-Verena
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Department of Materials and Environmental Chemistry (MMK)
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