Photoisomerization of a Capped Azobenzene in Solution Probed by Ultrafast Time-Resolved Electronic Absorption Spectroscopy

1998 ◽  
Vol 102 (46) ◽  
pp. 9161-9166 ◽  
Author(s):  
Igor K. Lednev ◽  
Tian-Qing Ye ◽  
Laurence C. Abbott ◽  
Ronald E. Hester ◽  
John N. Moore
Keyword(s):  
Absorption Spectroscopy ◽  
Electronic Absorption ◽  
Electronic Absorption Spectroscopy ◽  
Time Resolved

scholarly journals Benzazole derivatives, IV: Reaction of 1,2,3-trimethylbenzimidazolium salts with aromatic aldehydes

2005 ◽  
Vol 70 (12) ◽  
pp. 1381-1388 ◽  
Author(s):  
Cernatescu Corina ◽  
Comanita Eugenia
Keyword(s):  
Ir Spectroscopy ◽  
Benzene Ring ◽  
Absorption Spectroscopy ◽  
Electronic Absorption ◽  
Aromatic Aldehydes ◽  
Electronic Absorption Spectroscopy ◽  
Methyl Group ◽  
Practical Applications ◽  
Hemicyanine Dyes

1,2,3-Trimethylbenzimidazolium iodide and its analogue salts with one or two substituents on benzene ring (X=NO2,Br,Cl,CH3) are, due to the reactivity of the 2-methyl group, able to react with para-substituted aromatic aldehydes (X=OH,OCH3,CH3,NMe2,NO2) using piperidine as a catalyst. 1-Methyl-2-styrylbenzimidazole iodomethylates were obtained and their structure elucidated by means of NMR and IR spectroscopy. The compounds are interesting as hemicyanine dyes. They lend themselves to studies based on electronic absorption spectroscopy and they have potential practical applications linked to their photosensitive properties.

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