Affordable Access

Publisher Website

Spectral properties and applications of the new 7H-benzo[de]pyrazolo[5,1-a]isoquinolin-7-ones

Authors
Journal
Journal of Luminescence
0022-2313
Publisher
Elsevier
Publication Date
Identifiers
DOI: 10.1016/s0022-2313(02)00477-5
Keywords
  • Naphthalic Acid Derivatives
  • Isomers
  • Fluorescence
  • Light Shifters
Disciplines
  • Medicine
  • Physics

Abstract

Abstract The spectral properties of a series of new 11-acetyl- and 11-ethyl-carboxylate-10-methyl-7 H-benzo[ de]pyrazolo[5,1- a]isoquinolin-7-ones, their dimethylamino derivatives as well as their quinazolinium salts have been investigated. These compounds show bright fluorescence in solution, in poly methlmetacrylamide plastic matrices and in the solid state. The nature of the carbonyl substituent was found to affect the fluorescence quantum yields of the isoquinolinones, but apparently has no influence on the dimethylamino derivatives. These effects can be explained by the relative location of the S 1 ππ * and T 1 nπ * states. The presence of the dimethylamino group in the naphthalic moiety results in shifts of the absorption and emission maxima, and increases in quantum yields. These compounds are effective light shifters and have valuable properties for development of fluorescent markers for biomedical applications.

There are no comments yet on this publication. Be the first to share your thoughts.