Jump to main content
Jump to site search

Issue 42, 2012
Previous Article Next Article

Silica sol–gel glasses incorporating dual-luminescent Yb quinolinolato complex: processing, emission and photosensitising properties of the ‘antenna’ ligand

Author affiliations

Abstract

The [Yb(5,7ClQ)2(H5,7ClQ)2Cl] (1) complex, that exhibits dual-luminescence in the visible (ligand-centered) and in the NIR (Yb-centered), has been incorporated into a silica sol–gel glass obtaining 1-doped glassy material which is optically transparent and homogeneous and with good mechanical properties. The doped sol–gel glass can be considered a “solid state solution” and photophysical studies demonstrate that the emissive properties of the dopant complex are preserved in the silica matrix. Observed NIR decay times fall in the μs range and are likely limited by “second-sphere” matrix interactions. The ligand-to-metal energy transfer mechanism occurs on ultrafast timescale and involves ligand triplet states. The sensitization efficiency of the antenna quinolinolato ligand toward Yb3+ is estimated to be as high as ∼80%. The Yb natural radiative lifetime observed for 1 in MeCN–EtOH solution (τrad = 438 μs) is the shortest reported so far for ytterbium complexes.

Graphical abstract: Silica sol–gel glasses incorporating dual-luminescent Yb quinolinolato complex: processing, emission and photosensitising properties of the ‘antenna’ ligand

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 13 Feb 2012, accepted on 17 Apr 2012 and first published on 24 Sep 2012


Article type: Paper
DOI: 10.1039/C2DT30323J
Citation: Dalton Trans., 2012,41, 13147-13153
  •   Request permissions

    Silica sol–gel glasses incorporating dual-luminescent Yb quinolinolato complex: processing, emission and photosensitising properties of the ‘antenna’ ligand

    F. Artizzu, F. Quochi, M. Saba, D. Loche, M. L. Mercuri, A. Serpe, A. Mura, G. Bongiovanni and P. Deplano, Dalton Trans., 2012, 41, 13147
    DOI: 10.1039/C2DT30323J

Search articles by author