The influence of pyridyl-carboxylic acid intermolecular H-bond on photoisomerization and photochemical stabilities

Ying Wu, Hong Wei Zhou, Feng Quan Bu, Yan Qing Tian, Shi Mei Jiang

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

A new type of liquid crystalline was formed through self-assembly via intermolecular hydrogen bonding between the carboxylic acid and the pyridyl group of the stilbazoles. Cholesteryl butane diacid single ester (CSA) was synthesized for use as H-bond donor and the stilbazole derivatives (NCn) were prepared as H-bond acceptors. The spectroscopic behavior and the photochemical stabilities of these two compounds, NCn and its intermolecular H-bonding complex CSA·NCn were investigated by UV-Vis spectroscopy. The results show that these two compounds easily undergo photoisomerization from trans to cis isomers in alcohol. In chloroform solution, the CSA·NCn only undergoes trans-cis photoisomerization, while NCn exhibits not only trans-cis isomerization but also a special photoreaction. The reason is that in CSA·NCn compounds, the pyridyl N-end group is forms intermolecular H-bonding with CSA, and can't catch the H+ and the radical. It is proved that this intermolecular H-bond was very stable when being exposed to UV light.

Original languageEnglish (US)
Pages (from-to)503-506
Number of pages4
JournalGuang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis
Volume28
Issue number3
StatePublished - Mar 1 2008

Keywords

  • Intermolecular H-bond
  • Photoisomerization
  • Photoreaction
  • Stilbazole

ASJC Scopus subject areas

  • Instrumentation
  • Spectroscopy

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