Experimental and computational insights into the synthesis and characterization of a novel Schiff base ligand 2, 2′-[(1z, 14e)-2, 5, 8,11,14-pentaazapentadeca-1, 14-diene-diyl] diphenol

Abstract

A novel Schiff base of N1,N5-Bis(salicylidene) tetraethylene pentamine (BSTEPA) was synthesized by using reflux method. The prepared molecule has been characterized using 1H NMR and IR spectral methods. The complete vibrational characterization of the molecule was performed using experimental (FTIR and FT-Raman) spectra and calculations at Density Functional Theory (DFT) level. In order to perform a detailed vibrational spectroscopic analysis of BSTEPA, Fourier Transform Infrared (FTIR) and Fourier Transform Raman (FT-Raman) spectra were recorded in condensed phase and used as such. Density Functional Theory calculations in the B3LYP/6-31G** level have been carried out on the title molecule in order to determine the optimized geometry and vibrational wavenumbers. The ultraviolet visible (UV–Vis) spectra of BSTEPA were recorded in the range of 300–500 nm for various solvents. The natural bond orbital and frontier molecular orbital analyses were also performed at same DFT level of calculations.

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Code availability

The basic computational files for the title compound were available and can be shared upon the interest of the editor/reviewer.

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Acknowledgements

The authors are thankful to Sophisticated Analytical Instrumentation Facility (SAIF), IIT Madras and Department of Optoelectronics, University of Kerala for providing spectral measurements.

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Contributions

Dr. VR: has made contributions to the conceptualization, data curation, formal analysis, methodology, project administration, supervision, validation, visualization, original draft, review and editing of data for the work. Mrs. VN: has made contributions to the investigation, methodology and original draft of data for the work. Mr. VS: has made contributions to the conceptualization, project administration and resources of data for the work. Mr. BL: has made substantial contribution to the software of data for the work. Mr. SK: has made substantial contribution to the software of data for the work.

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Correspondence to V. Ragavendran.

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The basic computational data/files for the title compound was available and can be shared upon the interest of the editor/reviewer.

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Nivetha, V., Ragavendran, V., Santhanam, V. et al. Experimental and computational insights into the synthesis and characterization of a novel Schiff base ligand 2, 2′-[(1z, 14e)-2, 5, 8,11,14-pentaazapentadeca-1, 14-diene-diyl] diphenol. CSIT 9, 71–81 (2021). https://doi.org/10.1007/s40012-020-00322-3

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Keywords

  • Synthesis
  • Schiff base
  • FTIR & FT-Raman
  • DFT
  • UV–Visible