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Thermosalient Effect of 5-Fluorobenzoyl-4-(4-methoxyphenyl)ethynyl-1-methylimidazole without Phase Transition
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2022-09-16 , DOI: 10.1021/acs.cgd.2c00547 Youhei Miura 1 , Takashi Takeda 2 , Naoki Yoshioka 1 , Tomoyuki Akutagawa 2
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2022-09-16 , DOI: 10.1021/acs.cgd.2c00547 Youhei Miura 1 , Takashi Takeda 2 , Naoki Yoshioka 1 , Tomoyuki Akutagawa 2
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5-Fluorobenzoyl-4-(4-methoxyphenyl)ethynyl-1-methylimidazole 1 exhibited a thermosalient effect without phase transition. The crystal of 1 was jumped by heating to about 80 °C using a hot plate. No phase transition peak was observed at this temperature range according to DSC measurement, unlike renowned thermosalient crystals. Variable-temperature X-ray crystal structure analyses revealed that anisotropical cell constant expansion resulting from the torsion angle change between the imidazole group and carbonyl moiety induced unit cell constant expansion and the thermosalient effect.
中文翻译：
5-氟苯甲酰基-4-(4-甲氧基苯基)乙炔基-1-甲基咪唑无相变的热显着效应
5-Fluorobenzoyl-4-(4-methoxyphenyl)ethynyl-1-methylimidazole 1表现出无相变的热显着效应。1的晶体通过使用热板加热到约 80°C 来跳跃。根据 DSC 测量，在此温度范围内没有观察到相变峰，这与著名的热显着晶体不同。变温X射线晶体结构分析表明，由咪唑基团和羰基部分之间的扭转角变化引起的各向异性晶胞常数膨胀引起晶胞常数膨胀和热显着效应。
更新日期：2022-09-16
中文翻译：
5-氟苯甲酰基-4-(4-甲氧基苯基)乙炔基-1-甲基咪唑无相变的热显着效应
5-Fluorobenzoyl-4-(4-methoxyphenyl)ethynyl-1-methylimidazole 1表现出无相变的热显着效应。1的晶体通过使用热板加热到约 80°C 来跳跃。根据 DSC 测量，在此温度范围内没有观察到相变峰，这与著名的热显着晶体不同。变温X射线晶体结构分析表明，由咪唑基团和羰基部分之间的扭转角变化引起的各向异性晶胞常数膨胀引起晶胞常数膨胀和热显着效应。
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