Jun-Chao Qi, Yan Qin, Hang Peng, Hui-Peng Lv, Yong-Ju Bai, Xin Shen, Zhang-Tian Xia, Wei-Qiang Liao
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引用次数: 0
Abstract
Hybrid organic-inorganic metal halides (HOMHs) have attracted tremendous interest in the past decades due to their diverse functional properties, such as ferroelectricity and luminescence. However, although a large number of ferroelectric HOMHs and luminescent HOMHs have been reported, the HOMH ferroelectrics with white-light emission remain very sparse. Here, for the first time, by using the Z/E isomeric organic cation, we designed a cadmium-based HOMH ferroelectric [EE-PMU]CdCl4 (EE-PMU = pyridin-2-ylmethanamide muconate) with broadband white-light emission. In contrast to the [ZZ-PMU]CdCl4 with centrosymmetric crystal structure at room temperature, [EE-PMU]CdCl4 adopts the polar crystal symmetry, which shows piezoelectricity with a piezoelectric coefficient of d33 up to 19 pC/N and ferroelectricity with the saturated polarization of 1.52 µC/cm2. Moreover, [EE-PMU]CdCl4 exhibits a broadband white-light emission with an ultra-high color rendering index of 91 under UV excitation, which is related to the severely distorted [CdCl4]2− tetrahedron in the structure. To our knowledge, [EE-PMU]CdCl4 is the first example of Z/E isomeric cation-designed HOMH ferroelectric and the first cadmium halide white-light emissive ferroelectric. This finding paves a new way for the design of organic-inorganic molecular ferroelectrics with white-light emission.
期刊介绍:
Science China Chemistry, co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China and published by Science China Press, publishes high-quality original research in both basic and applied chemistry. Indexed by Science Citation Index, it is a premier academic journal in the field.
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