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Mechanochemical syn...
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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Alammar, Tarek (author)
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Hlova, Ihor Z. (author)
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Gupta, Shalabh (author)
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Biswas, Anis (author)
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Ma, Tao (author)
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Zhou, Lin (author)
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Balema, Viktor (author)
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Pecharsky, Vitalij K. (author)
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- Mudring, Anja-Verena (author)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK),Iowa State University, USA
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(creator_code:org_t)
- 2020
- 2020
- English.
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In: New Journal of Chemistry. - : Royal Society of Chemistry (RSC). - 1144-0546 .- 1369-9261. ; 44:3, s. 1054-1062
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https://doi.org/10.1...
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https://pubs.rsc.org...
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https://urn.kb.se/re...
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Abstract
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- 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.
Subject headings
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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