574 / 2019-03-20 00:07:59

Color and luminescence dissymmetry factor tuned by mechanical pressure in a circularly polarized luminescent material

Mechanofluorochromic luminescent materials,Circularly polarized luminescence,Chiroptical materials

全体主题 > High Pressure Physics and Materials Science

Mechanofluorochromic luminescent materials possess distinct mechanical stimuli responsiveness that provide wide applications in fluorescence switches, mechano-sensors, optoelectronic devices and data storage in various fields. Circularly polarized luminescence (CPL), a chiroptical property in optics and biological science is currently receiving intense interest. However, only few reports on materials that show both the color-switchable luminescence and CPL responses to external stimuli such as mechanical forces. Here, we report a new organic crystal of 2,2'-((([1,1'-binaphthalene]-2,2'-diylbis(azanediyl))bis(4,1-phenylene))bis(methanylylidene))dimalononitrile (or R/S-BINCN), which shows changing circularly polarized luminescence and a distinct fluorescent wavelength shifts upon isotropic compression, respectively. The luminescence dissymmetry factor glum exhibits environment-dependent and can be tuned in the range of ~0.1 to 0.01 by changing the pressure from 0 to 7.32 GPa. Good reversibility reveals in solid-state fluorescent, UV-Vis absorption and CPL spectra when release the stress to ambient pressure. Our work provides a color- an glum- tunable CPL material and offers a helpful insight into the designing functional chiroptical materials.