인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
Hybrid ferroelastics have attracted increasing attention for their potential application as mechanical switches. The sporadically documented anomalous ferroelastic phase transitions, <i>i.e.</i>, ferroelasticity that appears at a high-temperature phase rather than a low-temperature phase, are of particular interest but are not well understood at the molecular level. By judiciously choosing a polar and flexible organic cation (Me<sub>2</sub>NH(CH<sub>2</sub>)<sub>2</sub>Br<sup>+</sup>) with <i>cis</i>-/<i>anti</i>- conformations as an A-site component, we obtained two new polar hybrid ferroelastics, A<sub>2</sub>[MBr<sub>6</sub>] (M = Te for 1 and Sn for 2). These materials undergo distinct thermal-induced ferroelastic phase transitions. The larger [TeBr<sub>6</sub>]<sup>2-</sup> anions anchor the adjacent organic cations well and essentially endow 1 with a conventional ferroelastic transition (<i>P</i>2<sub>1</sub> → <i>Pm</i>2<sub>1</sub><i>n</i>) arising from a common order-disorder transition of organic cations without conformational changes. Moreover, the smaller [SnBr<sub>6</sub>]<sup>2-</sup> anions can interact with the adjacent organic cations in energetically similar sets of intermolecular interactions, enabling 2 to undergo an anomalous ferroelastic phase transition (<i>P</i>2<sub>1</sub>2<sub>1</sub>2<sub>1</sub> → <i>P</i>2<sub>1</sub>) arising from an unusual <i>cis</i>-/<i>anti</i>-conformational reversal of organic cations. These two instances demonstrate the importance of the delicate balance of intermolecular interactions for inducing anomalous ferroelastic phase transitions. The findings here provide important insights for seeking new multifunctional ferroelastic materials.
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.