title: Enhanced Sensitivity and Piezochromic Contrast through Single-Direction Extension of Molecular Structure.
abstract: Two piezochromic materials containing phenanthro[9,10-d]imidazole and tetraphenylethylene (M1 and M2) were developed. A supra-amplification piezochromic effect originating from their various long-to-short axis ratios was discovered in high-pressure experiments. Based on the linear relationship between applied pressure and emission-peak wavelength during pressurizing and depressurizing cycles, quantitative sensitivity for piezochromism could be denoted. M2 displayed higher piezochromic contrast (102 nm) and better sensitivity (11.19 nm GPa-1) than M1 (69 nm and 6.12 nm GPa-1), which helps to develop a more comprehensive general strategy to evaluate pressure-responsive performance.
authors: State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Qianjin Street No. 2699, Changchun, 130012, P. R. China.
authors: Zhao
authors: Z
authors: Gao
authors: State Key Laboratory of Superhard Materials, Jilin University, Qianjin Street No. 2699, Changchun, 130012, P. R. China.
authors: Kai
authors: K
authors: Wang
authors: State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Qianjin Street No. 2699, Changchun, 130012, P. R. China.
authors: Fangming
authors: F
authors: Liu
authors: State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Qianjin Street No. 2699, Changchun, 130012, P. R. China.
authors: Cunfang
authors: C
authors: Feng
authors: State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Qianjin Street No. 2699, Changchun, 130012, P. R. China.
authors: Xin
authors: X
authors: He
authors: State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Qianjin Street No. 2699, Changchun, 130012, P. R. China.
authors: Jinyu
authors: J
authors: Li
authors: State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Qianjin Street No. 2699, Changchun, 130012, P. R. China.
authors: Bing
authors: B
authors: Yang
authors: State Key Laboratory of Superhard Materials, Jilin University, Qianjin Street No. 2699, Changchun, 130012, P. R. China.
authors: Bo
authors: B
authors: Zou
authors: State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Qianjin Street No. 2699, Changchun, 130012, P. R. China.
authors: Ping
authors: P
authors: Lu
keywords: X-ray diffraction; phenanthrene[9,10-d]imidazole; piezochromic sensitivity; quantum efficiency; tetraphenylethylene