Design and Photophysical Investigation of Schiff Base-Functionalized Pyrrolo[3,2-c]carbazoles
Abstract
Two pyrrolo[3,2-c]carbazole-based Schiff bases 5a and 5b were synthesized via condensation of pyrrolo[3,2-c]carbazole-2-carbohydrazide with benzaldehyde and p-bromobenzaldehyde. Their structures were confirmed by NMR, FT-IR, MALDI-TOF, and X-ray crystallography. UV-Vis spectra of the compounds showed bands at 300-380 nm, corresponding to π→π* and n→π* transitions, were showed minimal effects by solvent or concentration. Fluorescence studies revealed dual emission behavior, indicating the coexistence of multiple emissive states in the excited state, particularly in polar solvents. The fluorescence quantum yields of 5a and 5b were determined as 0.44 and 0.47, respectively. These results highlight the structural and photophysical versatility of pyrrolo[3,2-c]carbazole Schiff bases and demonstrate their potential for applications in fluorescent sensing and optoelectronic materials.
Fields of Study & Subjects
Synthesis and Properties of Aromatic Compounds
Organic Light-Emitting Diodes Research
Luminescence and Fluorescent Materials
Publication details
- Journal / source
- Journal of Fluorescence
- Publisher
- Springer Science and Business Media LLC
- Volume
- 36
- Issue
- 5
- Pages
- 3623–3632
- Publication date
- 14 May 2026
- Language
- EN