Jump to main content
Jump to site search

Issue 40, 2019
Previous Article Next Article

Mechanochromic luminescence based on a phthalonitrile-bridging salophen zinc(ii) complex

Author affiliations


A 4,5-diaminophthalonitrile based zinc(II)–salophen complex CN-Zn was designed and synthesized with obvious mechanochromic properties to meet application demands for stimuli-responsive luminescent materials composed of cost-efficient organometallic molecules. CN-Zn solid exhibits reversible luminescence color alteration between vibrant yellow and orange (emission maximum from λmax = 560 nm to λmax = 591 nm) after first being mechanically ground and then treated by organic vapor fuming. The process is repeatable and highly sensitive, which makes CN-Zn a potential sensor of both external pressure and organic volatile gases. Thermal annealing of the ground CN-Zn powder at 150 °C and 230 °C resulted in red emission (λmax = 611 nm) and orange emission (λmax = 599 nm), respectively. Investigations were conducted using photophysical analyses, powder X-ray diffraction (XRD), and thermal testing (DSC and TGA) to apprehend the mechanism behind the stimuli-responsive properties. The results demonstrate that external treatment can lead to a packing mode transformation between the crystalline and amorphous phase in CN-Zn, thus creating morphology dependent emission features. In view of all properties, CN-Zn is a promising option for cost-efficient stimuli-responsive materials.

Graphical abstract: Mechanochromic luminescence based on a phthalonitrile-bridging salophen zinc(ii) complex

Back to tab navigation

Supplementary files

Publication details

The article was received on 17 Jul 2019, accepted on 06 Sep 2019 and first published on 09 Sep 2019

Article type: Paper
DOI: 10.1039/C9NJ03704G
New J. Chem., 2019,43, 15886-15891

  •   Request permissions

    Mechanochromic luminescence based on a phthalonitrile-bridging salophen zinc(II) complex

    X. Yan, X. Song, X. Mu and Y. Wang, New J. Chem., 2019, 43, 15886
    DOI: 10.1039/C9NJ03704G

Search articles by author