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High-Tc Enantiomeric Ferroelectrics Based on Homochiral Dabco-derivatives (Dabco=1,4-Diazabicyclo[2.2.2]octane).
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-07-04 , DOI: 10.1002/anie.202007660 Da-Wei Fu 1 , Ji-Xing Gao 1 , Wen-Hui He 2 , Xue-Qin Huang 2 , Yu-Hua Liu 2 , Yong Ai 2
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-07-04 , DOI: 10.1002/anie.202007660 Da-Wei Fu 1 , Ji-Xing Gao 1 , Wen-Hui He 2 , Xue-Qin Huang 2 , Yu-Hua Liu 2 , Yong Ai 2
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1,4‐Diazabicyclo[2.2.2]octane (dabco) and its derivatives have been extensively utilized as building units of excellent molecular ferroelectrics for decades. However, the homochiral dabco‐based ferroelectric remains a blank. Herein, by adding a methyl (Me) group accompanied by the introduction of homochirality to the [H2dabco]2+ in the non‐ferroelectric [H2dabco][TFSA]2 (TFSA=bis(trifluoromethylsulfonyl)ammonium), we successfully designed enantiomeric ferroelectrics [R and S‐2‐Me‐H2dabco][TFSA]2. The two enantiomers show two sequential phase transitions with transition temperature (Tc) as high as 405.8 K and 415.8 K, which is outstanding in both dabco‐based ferroelectrics and homochiral ferroelectrics. To our knowledge, [R and S‐2‐Me‐H2dabco][TFSA]2 are the first examples of dabco‐based homochiral ferroelectrics. This finding opens an avenue to construct dabco‐based homochiral ferroelectrics and will inspire the exploration of more eminent enantiomeric molecular ferroelectrics.
中文翻译：
基于手性Dabco衍生物（Dabco ＝ 1，4-二氮杂双环[2.2.2]辛烷）的高Tc对映体铁电体。
1,4-二氮杂双环[2.2.2]辛烷（dabco）及其衍生物已被广泛用作优秀分子铁电体的构建单元，已有数十年的历史。但是，基于达巴科的同手性铁电体仍然是空白。在此，通过在非铁电性[H 2 dabco] [TFSA] 2（TFSA =双（三氟甲基磺酰基）铵）的[H 2 dabco] 2+中加入甲基（Me）基并引入同手性，我们成功设计了对映体铁电体[ R和S -2-Me-H 2 dabco] [TFSA] 2。两种对映体在转变温度（T c）高达405.8 K和415.8 K，这在基于dabco的铁电体和同手性铁电体中都很出色。据我们所知，[ R和S -2-Me-H 2 dabco] [TFSA] 2是基于dabco的同手性铁电体的首例。这一发现为构建基于dabco的同手性铁电体开辟了道路，并将激发对更杰出的对映体分子铁电体的探索。
更新日期：2020-07-04
中文翻译：
基于手性Dabco衍生物（Dabco ＝ 1，4-二氮杂双环[2.2.2]辛烷）的高Tc对映体铁电体。
1,4-二氮杂双环[2.2.2]辛烷（dabco）及其衍生物已被广泛用作优秀分子铁电体的构建单元，已有数十年的历史。但是，基于达巴科的同手性铁电体仍然是空白。在此，通过在非铁电性[H 2 dabco] [TFSA] 2（TFSA =双（三氟甲基磺酰基）铵）的[H 2 dabco] 2+中加入甲基（Me）基并引入同手性，我们成功设计了对映体铁电体[ R和S -2-Me-H 2 dabco] [TFSA] 2。两种对映体在转变温度（T c）高达405.8 K和415.8 K，这在基于dabco的铁电体和同手性铁电体中都很出色。据我们所知，[ R和S -2-Me-H 2 dabco] [TFSA] 2是基于dabco的同手性铁电体的首例。这一发现为构建基于dabco的同手性铁电体开辟了道路，并将激发对更杰出的对映体分子铁电体的探索。
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