- 作者: A. I. M. Koraiem, R. M. Abd El-Aal and N. S. Mohammed*
- 作者服務機構: Chemistry Department, Aswan Faculty of Science, South Valley University, Aswan, Egypt
- 中文摘要: The new unsymmetrical N-bridgehead, apo (zeromethine), mono-methine, dimethine, meso substituted tetramethine and styryl cyanine dyes incorporating pyrazolo (4,5-b) indolizine (benzoindolizine) nuclei were prepared. Structural confirmation was carried out by elemental analyses, IR, 1H-NMR, mass spectra and 13C-NMR with the aid of carbon DEPT spectral data. The visible absorption spectra for the newly synthesized cyanines were examined in 95% ethanol.
- 英文摘要: --
- 中文關鍵字: Cyanine dyes; N-bridgehead; Synthesis; Spectral behaviour.
- 英文關鍵字: Cyanine dyes; N-bridgehead; Synthesis; Spectral behaviour.