Spectral and photophysical properties of intramolecular charge transfer fluorescence probe: 4'-dimethylamino-2,5-dihydroxychalcone.
The spectral and photophysical properties of a new intramolecular charge transfer (ICT) probe, namely 4'-dimethylamino-2,5-dihydroxychalcone (DMADHC) were studied in different solvents by using steady-state absorption and emission spectroscopy. Whereas the absorption spectrum undergoes minor change with increasing polarity of the solvents, the fluorescence spectrum experiences a distinct bathochromic shift in the band position and the fluorescence quantum yield increases reaching a maximum before decrease with increasing the solvent polarity. The magnitude of change in the dipole moment was calculated based on the Lippert-Mataga equation. These results give the evidence about the intramolecular charge transfer character in the emitting singlet state of this compound.
Xu
Zhicheng
Z
Department of Chemistry, Shanxi University, Taiyuan 030006, PR China.
Bai
Guan
G
Dong
Chuan
C
D047188:Chalcones / Q000737:chemistry*; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry*; D008956:Models, Chemical; D010777:Photochemistry; D012997:Solvents / Q000737:chemistry; D013050:Spectrometry, Fluorescence
C505273:4'-dimethylamino-2,5-dihydroxychalcone; D047188:Chalcones; D005456:Fluorescent Dyes; D012997:Solvents