Jump to main content
Jump to site search

Issue 29, 2015
Previous Article Next Article

Synthesis and optical power limiting properties of heteroleptic Mo3S7 clusters

Author affiliations

Abstract

Substitution of the halide ligands in (Bu4N)2[Mo3S7X6] (X = Cl, Br) by diimine ligands, such as 4,4′-dimethyl-2,2′-bipyridine (dmbpy), 2,2′-bipyridine (bpy) and 1,10-phenanthroline (phen), affords the neutral heteroleptic clusters Mo3S7Cl4(dmbpy) (1), Mo3S7Br4(dmbpy) (2), Mo3S7Br4(bpy) (3), and Mo3S7Br4(phen) (4). Further substitution of the halide ligands in Mo3S7Br4(diimine) clusters by dmit (1,3-dithiole-2-thione-4,5-dithiolate) allows the preparation of the mixed diimine–dithiolene neutral cluster complexes Mo3S7(dnbpy)(dmit)2 (5, dnbpy = 4,4′-dinonyl-2,2′-bipyridine), Mo3S7(dcmbpy)(dmit)2 (6, dcmbpy = 4,4′-dimethoxycarbonyl-2,2′-bipyridine), and Mo3S7(dcbpy)(dmit)2 (7, dcbpy = 2,2′-bipyridine-4,4′-dicarboxylic acid). The optical limiting properties of complexes 1–7 have been assessed by the open-aperture Z-scan technique at 570 nm, employing a nanosecond optical parametric oscillator. In order to investigate the effect of increasing the π-system, complexes 1–4, with the general formula Mo3S7X4(diimine), (X = Cl, Br), were compared to clusters 5–7, containing the dmit ligand. The influence of the metal content on the optical power limiting properties was also investigated by comparing the trinuclear series of complexes prepared herein with the bis(dithiolene) dinuclear cluster (Et4N)2[Mo2O2S2(BPyDTS2)2], which has been recently prepared by our group. All trinuclear clusters 1–7 are efficient optical limiters (σeff > σ0) with the threshold limiting fluence F15% decreasing on proceeding from dinuclear to trinuclear clusters and, generally, on extending the π-system.

Graphical abstract: Synthesis and optical power limiting properties of heteroleptic Mo3S7 clusters

Back to tab navigation

Supplementary files

Publication details

The article was received on 30 Mar 2015, accepted on 04 Jun 2015 and first published on 05 Jun 2015


Article type: Paper
DOI: 10.1039/C5DT01244A
Author version available: Download Author version (PDF)
Citation: Dalton Trans., 2015,44, 13163-13172
  •   Request permissions

    Synthesis and optical power limiting properties of heteroleptic Mo3S7 clusters

    D. Recatalá, R. Llusar, A. Barlow, G. Wang, M. Samoc, M. G. Humphrey and A. L. Guschin, Dalton Trans., 2015, 44, 13163
    DOI: 10.1039/C5DT01244A

Search articles by author

Spotlight

Advertisements