Document Type : Original Article


1 Department of Chemistry, Faculty of Education,, Ain Shams University, Roxy 11711, Cairo, Egypt

2 Department of Chemistry, Faculty of Science, Mansoura University, Mansoura ,Egypt


The electronic structure and spectra of schiff base derivatives compounds are investigated using TD-DFT/B3LYB/6-311G (d, p) level of theory. The results of calculations show that all the studied compounds 1–4 are non-planar, as indicated from the dihedral angles. The electronic absorption spectra of the studied compounds are recorded in the UV-VIS region, in both ethanol (as polar solvent) and dioxane (as non-polar solvent) . Solvent dependence of the band maxima (λmax) and intensities of the observed spectra are explained in terms of blue and red shifts. Electronic configurations contributing to each excited state are identified and the relevant MOs are characterized. The theoretical spectra computed at CAM-B3LYP/6-311G (d, p) in gas phase, ethanol and dioxane nicely reproduce the observed spectra. The natural bond orbital (NBO) analysis were discussed in terms of the extent of delocalization, intermolecular charge transfer and second order perturbation interactions between donor and acceptor MOs. The calculated EHOMO and ELUMO energies of the studied compounds can be used to explain the extent of charge transfer in the molecule and to calculate the global properties; the chemical hardness (η), global softness (S), electrophilicity (ω), and electronegativity (χ). The calculated nonlinear optical parameters (NLO); polarizibilty (α), anisotropy of the polarizibility (Δα) and first order hyperpolarizibility (β) of the studied compounds have been calculated at the same level of theory and compared with the proto type Para-Nitro-Aniline (PNA), show promising optical properties. 3D-plots of the molecular electrostatic potential (MEP) for some of the studied compounds are investigated and analyzed showing the distribution of electronic density of orbital's describing the electrophilic and nucleophilic sites of the selected molecules. The biological activity of the studied compounds was tested against gram positive, gram negative and Fungi. A correlation between energetic, global properties and biological activity were investigated and discussed.

Graphical Abstract

TD-DFT Calculations, Electronic Structure, NBO , NLO Analysis, Biological Activity, and Electronic Absorption Spectra of Some Novel Schiff base Derivatives


Main Subjects

1. Cimerman, Z., Miljanić, S., & Galić, N. (2000). Croat Chem Acta. 73:81-95.
2. Ghorbani-Choghamarani, A., Tahmasbi, B., Arghand, F., & Faryadi, S. (2015). RSC Adv, 112: 92174-92183.
3. Nikoorazm, M., Ghorbani‐Choghamarani, A., & Noori, N. (2015). Appl Organomet Chem. 5: 328-333.
4. Kabak, M., Elmali, A., & Elerman, Y. (1999). J Mol Struct, 477(1), 151-158.
5. Patel, P. R., Thaker, B. T., & Zele, S. (1999). Preparation and characterisation of some lanthanide complexes involving a heterocyclic β–diketone.
6. Nikoorazm, M., Ghorbani-Choghamarani, A., Panahi, A., Tahmasbi, B., & Noori, N. (2018). J Iran Chem Soc .1:181-189.
7. Nikoorazm, M., Ghorbani, F., Ghorbani-Choghamarani, A., & Erfani, Z. (2018). Phosphorus Sulfur, 1-10.
8. M. Nikoorazm, Ghorbani-Choghamarani, A., & Khanmoradi, M. (2016). RSC Adv, 61: 56549.
9. Raman, N., Raja, Y. P., & Kulandaisamy, A. (2001). J . Chemical Sciences, 113(3), 183-189.
10. Khanmoradi, M., Nikoorazm, M., & Ghorbani‐Choghamarani, A. (2017). Appl Organomet Chem, 9 : e3693.
11. Ghorbani‐Choghamarani, A., Darvishnejad, Z., & Norouzi, M. (2015) .Appl Organomet Chem, 10: 707-711.
12. ASHRAF¹, M. A., Wajid, A., Mahmood, K., MAAH¹, M. J., & Yusoff, I. (2011. Oriental Journal of Chemistry, 2: 363-372.
13. Ghorbani‐Choghamarani, A., Darvishnejad, Z., & Norouzi, M. (2015). Appl Organomet Chem, 3: 170-175.
14. Ghorbani-Choghamarani, A., Darvishnejad, Z., & Tahmasbi, B. (2015). Inorg Chimi Acta, 435 : 223-231.
15. Campos, A., Anacona, J. R., & Campos-Vallette, Μ. M. (1999).
Main Group Metal Chemistry, 22: 283-288.
16. Sari, N., Arslan, S., Logoglu, E., & Sakiyan, I. (2003). GUJ Sci, 1:283-288.
17. ASHRAF¹, M. A., Wajid, A., Mahmood, K., MAAH¹, M. J., & Yusoff, I. (2011).Oriental Journal of Chemistry, 27: 363-372.
18. Cozzi, P. G. (2004). Chem. Soc. Rev, 33: 410-421.
19. CHANDRA, S. (2004). Journal of the Indian Chemical Society, 81: 203-206.
20. Pandeya, S. N., Yogeeswari, P., Sriram, D., De Clercq, E., Pannecouque, C., & Witvrouw, M. (1999). Chemotherapy, 45:192-196.
21. Nikoorazm, M., Ghorbani-Choghamarani, A., & Noori, N. (2015). Journal of Porous Materials, 22: 877-885.
22. Becke, A. D. (1993). The Journal of chemical physics, 98: 5648-5652.
23. Lee, C., Yang, W., & Parr, R. G. (1988). Physical review B, 37: 785.
24. Frisch, M. J., Trucks, G. W., Schlegel, H. B., Scuseria, G. E., Robb, M. A., Cheeseman, J. R., ... & Millam, J. M. Komaromi, RL Martin, DJ Fox, T. Keith, MA Al-Laham, CY Peng, A. Nanayakkara, M. Challacombe, PMW Gill, B. Johnson, W. Chen, MW Wong, C. Gonzalez, JA Pople, Gaussian, 3.
25. Frisch, M. J. E. A., Trucks, G. W., Schlegel, H. B., Scuseria, G. E., Robb, M. A., Cheeseman, J. R., ... & Nakatsuji, H. (2009). Gaussian 09, revision a. 02, gaussian. Inc., Wallingford, CT, 200.
27. Avcı, D. (2011). Molecular and Biomolecular Spectroscopy, 82: 37-43.
28. Avcı, D. (2011). Molecular and Biomolecular Spectroscopy, 82: 37-43.
29. Avcı, D., Başoğlu, A., & Atalay, Y. (2010). Structural Chemistry, 21: 213-219.
30. Avci, D., Hüseyin, C. Ã., & Atalay, Y. (2008). Ab initio Hartree-Fock calculations on linear and second-order nonlinear optical properties of new acridine-benzothiazolylamine chromophores. Journal of molecular modeling, 14(2).
31. Pearson, R. G. (1986). Proceedings of the National Academy of Sciences, 83: 8440-8441.
32. Günay, N., Pir, H., Avcı, D., & Atalay, Y. (2012). NLO and NBO analysis of sarcosine-maleic acid by using HF and B3LYP calculations. Journal of Chemistry, 2013.
33. J.G. Matecki, (2010) Trans. Met. Chem. 35: 801.
34. Yanai, T., Tew, D. P., & Handy, N. C. (2004). Chemical Physics Letters, 393: 51-57.
35. Chocholoušová, J., Špirko, V., & Hobza, P. (2004). Physical Chemistry Chemical Physics, 6: 37-41.
36. Szafran, M., Komasa, A., & Bartoszak-Adamska, E. (2007). Journal of molecular structure, 827: 101-107.
37. Macoonald, J. N., Mackay, S. A., Tyler, J. K., Cox, A. P., & Ewart, I. C. (1981). J. Chem. Soc. Farady Trans. II, 77: 79-89.
38. D.Y. Sajan, R. Erdogdu, O. Reshmy, K. Dereli, K. Thomas, I. Hubert Joe Spectrochimica Acta Part A 82 (2011) 118-128.
39. Reed, A. E., Weinstock, R. B., & Weinhold, F. (1985). Natural population analysis. The Journal of Chemical Physics, 83: 735-746.
40. Bradshaw, D. S., & Andrews, D. L. (2009). Quantum channels in nonlinear optical processes. Journal of Nonlinear Optical Physics & Materials, 18: 285-299.
41. Cheng, L. T., Tam, W., Stevenson, S. H., Meredith, G. R., Rikken, G., & Marder, S. R. (1991). The Journal of Physical Chemistry, 95: 10631-10643.
42. Kaatz, P., Donley, E. A., & Shelton, D. P. (1998). A comparison of molecular hyperpolarizabilities from gas and liquid phase measurements. The Journal of chemical physics, 108(3), 849-856.
43. Rajesh, P., Gunasekaran, S., Gnanasambandan, T., & Seshadri, S. (2015). Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 137: 1184-1193.
44. Scrocco, E., & Tomasi, J. (1978). (Vol. 11, pp. 115-193). Academic Press.
45. Politzer, P., & Murray, J. S. (2002). Theoretical Chemistry Accounts, 108: 134-142.
46. Sajan, D., Joseph, L., Vijayan, N., & Karabacak, M. (2011) Molecular and Biomolecular Spectroscopy, 81: 85-98.