Thermal, optical and Photophysical behaviour of some Mesogenic Benzimidazole-based Schiff-bases

A series of luminescent benzimidazole-based Schiff-bases, 5-(alkyloxy)-2-(((2-(4-(alkyloxy)phenyl)-1H–benzimidazol-5-yl)imino)methyl)phenol, with different alkyl chains was synthesized and characterized by 1H &13C NMR, UV–Vis, fluorescence and mass spectrometry. All the compounds were found to b...

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Bibliographic Details
Published in:Journal of molecular liquids 2017-12, Vol.248, p.214-218
Main Authors: Yerrasani, Rajasekhar, Karunakar, M., Dubey, Ragini, Singh, Angad Kumar, Rao, T.R.
Format: Article
Language:English
Subjects:
Benzimidazole
Fluorescence
Liquid crystal
Schiff-base
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Summary:A series of luminescent benzimidazole-based Schiff-bases, 5-(alkyloxy)-2-(((2-(4-(alkyloxy)phenyl)-1H–benzimidazol-5-yl)imino)methyl)phenol, with different alkyl chains was synthesized and characterized by 1H &13C NMR, UV–Vis, fluorescence and mass spectrometry. All the compounds were found to be mesogenic (smectic A1), as studied by POM and DSC techniques, and their green emission was implied by fluorescence studies. Electrochemical study of one of the compounds, 3d, shows a band gap of 2.56eV with HOMO and LUMO energy levels at −5.22eV and −2.67eV, respectively. [Display omitted] •Some benzimidazole-based SmA Schiff-bases with different alkyl chains synthesized•Intercalation of alkyl chains exists between the layers•Fluorescence spectra show green emission with quantum yield up to 0.16–0.20•Calculated values of HOMO and LUMO are close to experimental CV values
ISSN:0167-7322
1873-3166
DOI:10.1016/j.molliq.2017.10.051