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A simple strategy to achieve remarkable mechanochromism of cationic Ir(III) phosphors through subtle ligand modification

Abstract

Clear relationship between structure and desired property is a crucial factor for further material design with diverse structure and performance optimization. Herein, a new design strategy to achieve efficient mechanochromism of Ir(III) complexes has been described by deeply exploring the photophysical properties of a series of cationic Ir(III) phosphors that contain same main ligands but easily tunable donor-acceptor type ancillary ligands. All designed phosphors exhibit intense emissions in solid-states due to intrinsic aggregation-induced emission (AIE) characteristics. By simply tuning the donor moiety on ancillary ligand, controllable and naked-eye visible mechanochromic luminescent behavior has been successfully realized. Compared with the previous works, this design strategy reported herein is more simple and feasible. Subtle modification of donor groups on ancillary ligands leads to obvious changes of the dipole moments. The larger the dipole moments, the more efficient is the mechanochromism for such studied system. Benefiting from the prominent and reversible mechanochromism as well as intense emission in aggregation state, the efficient data encryption device and sensitive explosive probe towards 2,4,6-trinitrophenol (TNP) are achieved.

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Publication details

The article was received on 25 Jul 2018, accepted on 05 Oct 2018 and first published on 12 Oct 2018


Article type: Paper
DOI: 10.1039/C8TC03696A
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    A simple strategy to achieve remarkable mechanochromism of cationic Ir(III) phosphors through subtle ligand modification

    K. Zhao, H. Mao, L. Wen, G. Shan, Q. Fu, H. Sun and Z. Su, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC03696A

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