{"title":"液晶羟基肟酸衍生物的热稳定性","authors":"C. Sharma, N. Pandya, S. Shukla, Y. Agrawal","doi":"10.1134/S1990793125700149","DOIUrl":null,"url":null,"abstract":"<p>The liquid crystalline behaviour of five newly synthesized <i>N</i>-4-alkoxyphenyl-4'-<i>n</i>-butoxycinnamohydroxamic acids was systematically studied using optical microscopy and differential scanning calorimetry. These compounds demonstrated a variety of mesophases, including smectic and schlieren nematic phases. Among the synthesized compounds, <i>N</i>-4-<i>n</i>-butoxyphenyl-4'-<i>n</i>-butoxycinnamohydroxamic acid exhibited the highest thermal stability. In contrast, <i>N</i>-4-isopropoxyphenyl-4'-<i>n</i>-butoxycinnamohydroxamic acid showed comparatively lower thermal stability. This investigation provides valuable insights into the relationship between molecular structure and liquid crystalline behaviour, highlighting the influence of terminal alkoxy groups on the thermal properties of hydroxamic acids.</p>","PeriodicalId":768,"journal":{"name":"Russian Journal of Physical Chemistry B","volume":"19 2","pages":"432 - 441"},"PeriodicalIF":1.4000,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Thermal Stability of Liquid Crystalline Hydroxamic Acid Derivatives\",\"authors\":\"C. Sharma, N. Pandya, S. Shukla, Y. Agrawal\",\"doi\":\"10.1134/S1990793125700149\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The liquid crystalline behaviour of five newly synthesized <i>N</i>-4-alkoxyphenyl-4'-<i>n</i>-butoxycinnamohydroxamic acids was systematically studied using optical microscopy and differential scanning calorimetry. These compounds demonstrated a variety of mesophases, including smectic and schlieren nematic phases. Among the synthesized compounds, <i>N</i>-4-<i>n</i>-butoxyphenyl-4'-<i>n</i>-butoxycinnamohydroxamic acid exhibited the highest thermal stability. In contrast, <i>N</i>-4-isopropoxyphenyl-4'-<i>n</i>-butoxycinnamohydroxamic acid showed comparatively lower thermal stability. This investigation provides valuable insights into the relationship between molecular structure and liquid crystalline behaviour, highlighting the influence of terminal alkoxy groups on the thermal properties of hydroxamic acids.</p>\",\"PeriodicalId\":768,\"journal\":{\"name\":\"Russian Journal of Physical Chemistry B\",\"volume\":\"19 2\",\"pages\":\"432 - 441\"},\"PeriodicalIF\":1.4000,\"publicationDate\":\"2025-07-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Russian Journal of Physical Chemistry B\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S1990793125700149\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"PHYSICS, ATOMIC, MOLECULAR & CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Physical Chemistry B","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1134/S1990793125700149","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, ATOMIC, MOLECULAR & CHEMICAL","Score":null,"Total":0}
Thermal Stability of Liquid Crystalline Hydroxamic Acid Derivatives
The liquid crystalline behaviour of five newly synthesized N-4-alkoxyphenyl-4'-n-butoxycinnamohydroxamic acids was systematically studied using optical microscopy and differential scanning calorimetry. These compounds demonstrated a variety of mesophases, including smectic and schlieren nematic phases. Among the synthesized compounds, N-4-n-butoxyphenyl-4'-n-butoxycinnamohydroxamic acid exhibited the highest thermal stability. In contrast, N-4-isopropoxyphenyl-4'-n-butoxycinnamohydroxamic acid showed comparatively lower thermal stability. This investigation provides valuable insights into the relationship between molecular structure and liquid crystalline behaviour, highlighting the influence of terminal alkoxy groups on the thermal properties of hydroxamic acids.
期刊介绍:
Russian Journal of Physical Chemistry B: Focus on Physics is a journal that publishes studies in the following areas: elementary physical and chemical processes; structure of chemical compounds, reactivity, effect of external field and environment on chemical transformations; molecular dynamics and molecular organization; dynamics and kinetics of photoand radiation-induced processes; mechanism of chemical reactions in gas and condensed phases and at interfaces; chain and thermal processes of ignition, combustion and detonation in gases, two-phase and condensed systems; shock waves; new physical methods of examining chemical reactions; and biological processes in chemical physics.