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
Thermally responsive molecular crystals exhibiting programmable mechanical motions hold significant promise for applications in smart actuators, sensors, and drug delivery systems. However, achieving precise control over their phase transition thermodynamics remains a fundamental challenge. A series of isomorphic 5-fluorocytosine/fatty acid cocrystals is reported where the phase transition temperatures vary across an interval of 100 K with increasing alkyl chain. Two distinct transition pathways are unveiled: i) a cooperative single-crystal-to-single-crystal transition (II-III) accompanied by explosive mechanical motions, and ii) a reconstructive transition (I-III) following classical nucleation-growth mechanisms. The cooperative phase transition (II-III) induces remarkable expansion, with a striking +64.4% expansion along the layer stacking direction and a -16.9% contraction perpendicular to the (001) plane, leading to dynamic phenomena such as jumping, rotating, and splitting. Notably, the transition temperatures (T<sub>t, II-III</sub>) exhibit linear dependence on coformer chain length (from C10 to C18), a correlation attributed to interlayer hydrophobic interactions. This work provides a versatile approach for designing molecular crystals with tunable thermo-mechanical properties, offering new opportunities for advanced applications in dynamic functional 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.