...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Crystal growth & design >Re-evaluation of the tert-Butyl Method in Crystal Engineering of Salicylideneanilines by Simultaneous Observation of Photochromism and Thermochromism in Single Crystals
【24h】

Re-evaluation of the tert-Butyl Method in Crystal Engineering of Salicylideneanilines by Simultaneous Observation of Photochromism and Thermochromism in Single Crystals

机译：单晶体中的光学变色和热切割方法，在水杨酰胺中的晶体工程叔丁基法重新评价

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Single-crystal microscopic absorption spectroscopy was used to clarify the effect of a bulky substituent on the photochromic properties of salicylideneanilines. We discovered that 3,5-di-tert-butylsalicylideneaniline (1), exhibiting debatable chromic properties, had at least three crystalline polymorphs, alpha(1), alpha(1), and beta. alpha(1)-1 is thermochromic from -75 to 45 degrees C and also photochromic, particularly from -75 to 0 degrees C; alpha(2)-1 is photochromic but considerably unstable and transforms into the beta form; beta-1 is thermochromic from -75 to 90 degrees C but not photochromic. The 4'-methyl analogue of 1 (2) is simultaneously thermochromic and photochromic, especially around 75 degrees C, and the 4'-chloro analogue (3) is thermochromic from -75 to 90 degrees C and is more strongly photochromic at lower temperatures. Comparison of the crystal structures facilitated the identification of some common features among the photochromic species. We demonstrated a quantitative temperature-dependent photochromic response profile for the first time. The observed temperature dependence of photoinduced spectral changes presents an intrinsic challenge to the conventional dualistic classification of compounds as photo- or thermochromic.
机译：单晶显微镜吸收光谱法用于阐明庞大取代基对水杨苷的光致变色性质的影响。我们发现，表现出脱脂铬特性的3,5-二叔丁基丙烯酰胺（1）具有至少三种结晶多晶型物，α（1），α（1）和β。 α（1）-1是从​​-75至45摄氏度的热致变色，也是光致变色，特别是从-75到0摄氏度; Alpha（2）-1是光致变色的，但相当不稳定并转化为β形式; Beta-1从-75至90摄氏度的热致变色，但不是光致变色。 1（2）的4'-甲基类似物同时是热致变色和光致变色，特别是在75℃下，4'-氯类似物质（3）是-75至90℃的热致变色，在较低温度下更强烈的光致变色。晶体结构的比较便于鉴定光致变色物种中的一些共同特征。我们首次展示了定量温度依赖性光致变色响应谱。光诱导光谱变化的观察到的温度依赖性对常规的化合物或热致变色的常规二元分类具有内在挑战。

著录项

  • 来源
    《Crystal growth & design》 |2019年第2期|共7页
  • 作者

    Houjou Hirohiko; Kato Taku; Huang Hongyi; Suzuki Yoshikazu; Yoshikawa Isao; Mutai Toshiki;

  • 作者单位

    Univ Tokyo Inst Ind Sci Meguro Ku 4-6-1 Komaba Tokyo 1538505 Japan;

    Univ Tokyo Inst Ind Sci Meguro Ku 4-6-1 Komaba Tokyo 1538505 Japan;

    Univ Tokyo Inst Ind Sci Meguro Ku 4-6-1 Komaba Tokyo 1538505 Japan;

    Univ Tokyo Inst Ind Sci Meguro Ku 4-6-1 Komaba Tokyo 1538505 Japan;

    Univ Tokyo Inst Ind Sci Meguro Ku 4-6-1 Komaba Tokyo 1538505 Japan;

    Univ Tokyo Inst Ind Sci Meguro Ku 4-6-1 Komaba Tokyo 1538505 Japan;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 晶体学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号