Jump to main content
Jump to site search

Issue 23, 2011
Previous Article Next Article

Arene effects on difluoroboron β-diketonate mechanochromic luminescence

Author affiliations

Abstract

Difluoroboron β-diketonate (BF2bdk) dyes display reversible mechanochromic luminescence (ML) in the solid state. A series of BF2bdk dyes with methyl, phenyl, naphthyl and anthracyl groups (i.e. arene substituents and bdk ligands: Me–Ph = mbm, Ph–Ph = dbm, Np–Ph = nbm, An–Ph = abm) were prepared to test the effects of π conjugation length and arene size on ML properties. Solid-state emission spectra were recorded for powders, spin-cast films, and dye coated weighing paper. The materials emit at various wavelengths from blue to red, depending on the conjugation length. Additionally, emission spectra were recorded for smeared solids and their recovery was tracked at room temperature over time. All dyes except for BF2mbm show emission changes upon mechanical perturbation, with increasing π conjugation correlating with more dramatic, redshifted fluorescence, however, their recovery is significantly affected by the aromatic substituents. The thermal and structural properties of the dyes in the solid state were also investigated by differential scanning calorimetry (DSC) and atomic force microscopy (AFM).

Graphical abstract: Arene effects on difluoroboron β-diketonate mechanochromic luminescence

Back to tab navigation

Supplementary files

Additions and corrections

Publication details

The article was received on 11 Dec 2010, accepted on 02 Feb 2011 and first published on 24 Feb 2011


Article type: Paper
DOI: 10.1039/C0JM04326E
J. Mater. Chem., 2011,21, 8401-8408

  •   Request permissions

    Arene effects on difluoroboron β-diketonate mechanochromic luminescence

    T. Liu, A. D. Chien, J. Lu, G. Zhang and C. L. Fraser, J. Mater. Chem., 2011, 21, 8401
    DOI: 10.1039/C0JM04326E

Search articles by author

Spotlight

Advertisements