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  • Title: Facile synthesis and photo-physical properties of cyano-substituted styryl derivatives based on carbazole/phenothiazine.
    Author: Lu M, Zhu Y, Ma K, Cao L, Wang K.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2012 Sep; 95():128-34. PubMed ID: 22617218.
    Abstract:
    Four new cyano-substituted styryl derivatives based on carbazole and phenothiazine were facilely synthesized by conventional Knoevenagel condensation and well characterized. The UV-vis spectra of these dyes showed the lowest-energy absorption bands were mainly caused by the HOMO-LUMO one-electron promotion as conformed by TD-DFT calculations. The thermogravimetric analysis showed these dyes were thermally stable up to 350 °C. The UV-vis absorption and fluorescence emission spectra were also studied in solvents of different polarity, these dyes exhibited unusual large Stokes shift.
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