通过氰甲基取代精确设计的具有相变和高压电性的同手性极性分子压电材料

IF 2.6 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
CrystEngComm Pub Date : 2024-05-15 DOI:10.1039/D4CE00023D
Shu-Jing Yang, Yong-Ju Bai, Jun-Chao Qi, Xiao-Yun Huang, Xin Shen, Yan-Zi Lu, Zhang-Tian Xia, Hui-Peng Lv and Wei-Qiang Liao
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引用次数: 0

摘要

压电性是非中心对称晶体材料最理想的特性之一,由于其独特的机电转换能力,在学术研究、工业制造和日常应用中早已遍地开花。与市场上占主导地位的无机压电陶瓷相比,分子基压电材料具有重量轻、机械柔性好、环境友好等优点,近年来引起了广泛关注。然而,对具有大压电系数的分子材料的研究主要集中在有机-无机杂化材料上,而具有大压电系数的纯有机同手性压电材料仍然很少。在此,通过对带有极性氰甲基的(S)-2-甲基哌嗪-1-鎓高氯酸盐([(S)-MPP][ClO4])进行精确的分子修饰,一种同手性纯有机化合物(3S)-3-甲基-1、4-di(cyanomethyl)piperazin-1-ium perchlorate [DCM-(S)-MPP][ClO4],其 d22 大至 18 pC/N,同时空间基团也从非极性变为极性,从而产生了二次谐波生成和相变行为。本文提出的改性策略将有利于增强更多手性化合物的压电性,促进其在生物医学、柔性器件和绿色化学领域的应用潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

A homochiral polar molecular piezoelectric material with phase transition and high piezoelectricity precisely designed by cyanomethyl group substitution†

A homochiral polar molecular piezoelectric material with phase transition and high piezoelectricity precisely designed by cyanomethyl group substitution†

A homochiral polar molecular piezoelectric material with phase transition and high piezoelectricity precisely designed by cyanomethyl group substitution†

Piezoelectricity, one of the most desirable properties of non-centrosymmetric crystalline materials, has long been blooming in academic research, industrial manufacturing, and daily applications owing to its unique electromechanical transformation capability. Compared with inorganic piezoelectric ceramics dominating the market, molecule-based piezoelectric materials exhibit advantages of light weight, mechanical flexibility, and environment friendliness and have attracted widespread interest recently. However, investigations on molecular materials with large piezoelectric coefficients are mainly focused on organic–inorganic hybrids, while pure organic homochiral piezoelectrics holding large piezoelectric coefficients remain scarce. Herein, by precise molecular modification on (S)-2-methylpiperazin-1-ium perchlorate ([(S)-MPP][ClO4]) with polar cyanomethyl groups, a homochiral pure organic compound (3S)-3-methyl-1,4-di(cyanomethyl)piperazin-1-ium perchlorate [DCM-(S)-MPP][ClO4] with large d22 of 18 pC/N was achieved, along with changes in the space group from nonpolar to polar, giving rise to second harmonic generation and phase transition behaviors. The modification strategy proposed here will benefit piezoelectricity enhancement in more chiral compounds, promoting their application potential in biological medicine, flexible devices, and green chemistry.

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来源期刊
CrystEngComm
CrystEngComm 化学-化学综合
CiteScore
5.50
自引率
9.70%
发文量
747
审稿时长
1.7 months
期刊介绍: Design and understanding of solid-state and crystalline materials
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