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Issue 30, 2014
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Photoluminescent chromium molybdate cluster coordinated with rare earth cations: synthesis, structure, optical and magnetic properties

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Abstract

The Anderson–Evans cluster, {CrMo6O24}n, exhibits ruby-like red emission. During our attempts to engineer new photoluminescent crystals using chromium molybdate as a molecular building block, we isolated four new rare-earth based chromium molybdates: [Gd(H2O)7{CrMo6(OH)6O18}]·4H2O, 1, (4-pycH)[Gd(H2O)4{CrMo6(OH)6O18}(4-pycH)]·5H2O, 3, and (4-pycH)2[Ln(H2O)6{CrMo6(OH)6O18}]·2H2O, (Ln = Tb, 4 and Sm, 5; H4-pyc = 4-pyridine carboxylic acid and 4-pycH = 4-pyridinium carboxylate). All are nonmolecular solids characterized by extended 1-D or 2-D interactions between rare-earth ions and the chromium molybdate cluster. All solids showed intense room-temperature Cr3+ related red emission and also exhibited weak antiferromagnetism at low temperatures.

Graphical abstract: Photoluminescent chromium molybdate cluster coordinated with rare earth cations: synthesis, structure, optical and magnetic properties

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Publication details

The article was received on 23 Apr 2014, accepted on 05 Jun 2014 and first published on 24 Jun 2014


Article type: Paper
DOI: 10.1039/C4CE00865K
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Citation: CrystEngComm, 2014,16, 7097-7105
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    Photoluminescent chromium molybdate cluster coordinated with rare earth cations: synthesis, structure, optical and magnetic properties

    D. Kumar, S. Ahmad, G. V. Prakash, K. V. Ramanujachary and A. Ramanan, CrystEngComm, 2014, 16, 7097
    DOI: 10.1039/C4CE00865K

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