Enhanced Sensitivity and Piezochromic Contrast through Single-Direction Extension of Molecular Structure

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• 作者：Dr. Zhao Gao ; Dr. Kai Wang ; Dr. Fangming Liu ; Dr. Cunfang Feng ; Dr. Xin He ; Dr. Jinyu Li ; Prof. Bing Yang ; Prof. Bo Zou and Prof. Ping Lu
• 刊名：Chemistry - A European Journal
• 出版年：2017
• 出版时间：January 18, 2017
• 年：2017
• 卷：23
• 期：4
• 页码：773-777
• 全文大小：2348K
• ISSN：1521-3765

文摘

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.