Jump to main content
Jump to site search

Issue 40, 2017
Previous Article Next Article

Solvent-mediated purification of hexa-molybdenum cluster halide, Cs2[Mo6Cl14] for enhanced optical properties

Author affiliations

Abstract

The crystallization of a high-purity hexamolybdenum cluster chloride, Cs2[Mo6Cl14], was investigated with the aim of improving its intrinsic properties, including optical properties. In particular, we used the hydrophilicities of alcoholic solvents to purify Cs2[Mo6Cl14] by dehydration. The precursor, trigonal Cs2[Mo6Cl14] with water impurities, or monoclinic Cs2[Mo6Cl14]·H2O, was dispersed in methanol (MeOH), ethanol (EtOH), or 1-propanol (1-PrOH) to induce recrystallization during stirring. As a result, regardless of the precursor, Cs2[Mo6Cl14] crystallized from EtOH and 1-PrOH, while Cs2[Mo6Cl14]·H2O crystallized from MeOH, which indicates that EtOH and 1-PrOH behave as dehydrating agents during recrystallization. Subsequent characterization by X-ray diffraction, thermal desorption, and infrared spectroscopic techniques confirmed that the Cs2[Mo6Cl14] crystallized from EtOH or 1-PrOH, particularly 1-PrOH, is of high purity (fewer inserted water molecules) and high crystallinity. Improved luminescence efficiency following purification was evidenced by time-resolved photoluminescence measurements; the Cs2[Mo6Cl14] purified by dehydration on recrystallization clearly exhibited an increased luminescence lifetime.

Graphical abstract: Solvent-mediated purification of hexa-molybdenum cluster halide, Cs2[Mo6Cl14] for enhanced optical properties

Back to tab navigation

Supplementary files

Publication details

The article was received on 08 Aug 2017, accepted on 28 Sep 2017 and first published on 29 Sep 2017


Article type: Paper
DOI: 10.1039/C7CE01440F
Citation: CrystEngComm, 2017,19, 6028-6038
  •   Request permissions

    Solvent-mediated purification of hexa-molybdenum cluster halide, Cs2[Mo6Cl14] for enhanced optical properties

    N. Saito, P. Lemoine, S. Cordier, Y. Wada, T. Ohsawa, N. Saito, F. Grasset, J. S. Cross and N. Ohashi, CrystEngComm, 2017, 19, 6028
    DOI: 10.1039/C7CE01440F

Search articles by author

Spotlight

Advertisements