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A novel chromatism switcher with double receptors selectively for Ag+ in neutral aqueous solution: 4,5-diaminoalkeneamino-N-alkyl-l,8-naphthalimides
- Source :
-
Tetrahedron Letters: International Organ for the Rapid Publication of Preliminary Communications in Organic Chemistry . May2004, Vol. 45 Issue 20, p3969. 5p. - Publication Year :
- 2004
-
Abstract
- Two novel fluorosensors of 4,5-disubstituted-N-alkyl-l,8-naphthalimide derivatives (H1, H2, H3) with double ethylenediamino receptors, double propylenediamino receptors, or one methylpiperazine receptor were synthesized, respectively. Their fluorescence and absorption in the presence or absence of nine metal ions were studied. In the presence of Ag+, H1''s absorption moved to long wavelength with color change from yellow-green to red, its quenching and red shift in fluorescence were also remarkable. Similarly, H1''s fluorescence was also strongly quenched in the presence of Cu2+. In addition, H1 and H2 show high pH sensitively. There was 139-folds fluorescence enhancement for H1, 22-folds for H2, and 4-folds for H3 when pH was changed from 8 to 3, respectively. [Copyright &y& Elsevier]
- Subjects :
- *FLUORESCENCE
*METAL ions
*METAL quenching
*PH effect
Subjects
Details
- Language :
- English
- ISSN :
- 00404039
- Volume :
- 45
- Issue :
- 20
- Database :
- Academic Search Index
- Journal :
- Tetrahedron Letters: International Organ for the Rapid Publication of Preliminary Communications in Organic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 12896032
- Full Text :
- https://doi.org/10.1016/j.tetlet.2004.03.105