European Journal of Chemistry 2023, 14(1), 53-64 | doi: https://doi.org/10.5155/eurjchem.14.1.53-64.2365 | Get rights and content

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Spectroscopic study of solvent effects on the electronic absorption spectra of morpholine and its complexes


Mamdouh Saad Masoud (1) orcid , Alaa Eldin Ali (2) orcid , Gehan Shaaban Elasala (3) orcid , Rehab Elsaid Elwardany (4,*) orcid

(1) Department of Chemistry, Faculty of Science, University of Alexandria, Alexandria, 21515, Egypt
(2) Department of Chemistry, Faculty of Science, University of Damanhour, Damanhour, 22511,
(3) Department of Chemistry, Faculty of Science, University of Damanhour, Damanhour, 22511, Egypt
(4) Department of Chemistry, Faculty of Science, University of Damanhour, Damanhour, 22511, Egypt
(*) Corresponding Author

Received: 25 Nov 2022 | Revised: 05 Jan 2023 | Accepted: 14 Jan 2023 | Published: 31 Mar 2023 | Issue Date: March 2023

Abstract


The electronic absorption spectra of morpholine and its five morpholine complexes have been studied in different solvents of various polarities. The regression and correlation coefficients have been calculated with the SPSS program. Solvation energy relationships were deduced from spectral shifts and correlated with solvent parameters α (solvent hydrogen bond donor acidity), β (solvent hydrogen bond acceptor basicity), and π* (dipolarity/polarizability). The percentage contributions of the calculated solvatochromic parameters show that classic solvation effects play a major role in explaining the spectral shifts in all investigated complexes. The blue shift of [Fe(MOR)3Cl3]·4H2O, [Ni(MOR)4Cl2]·4H2O, and [Cu(MOR)4Cl2]·6H2O complexes is due to the formation of hydrogen bonds, which suggests the stabilization of the ground electronic state compared with the excited state. [CuNi(MOR)2Cl4]·4H2O and [CuZn(MOR)3Cl4]·2H2O are mixed metal complexes that suffer a red shift due to the solute-solvent interactions, which causes stabilization of the excited solute state with increasing solvent polarity. The bands are affected by specific solute-solvent interactions including hydrogen bond donor ability (acidity) and hydrogen bond acceptor ability (basicity) and nonspecific solute-solvent interactions including electromagnetic interaction between the dipole moments of solute and polar solvents.


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Keywords


UV spectra; Absorption; Dipole moment; Solvent polarity; Solvatochromic; Morpholine complexes

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DOI: 10.5155/eurjchem.14.1.53-64.2365

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How to cite


Masoud, M.; Ali, A.; Elasala, G.; Elwardany, R. Eur. J. Chem. 2023, 14(1), 53-64. doi:10.5155/eurjchem.14.1.53-64.2365
Masoud, M.; Ali, A.; Elasala, G.; Elwardany, R. Spectroscopic study of solvent effects on the electronic absorption spectra of morpholine and its complexes. Eur. J. Chem. 2023, 14(1), 53-64. doi:10.5155/eurjchem.14.1.53-64.2365
Masoud, M., Ali, A., Elasala, G., & Elwardany, R. (2023). Spectroscopic study of solvent effects on the electronic absorption spectra of morpholine and its complexes. European Journal of Chemistry, 14(1), 53-64. doi:10.5155/eurjchem.14.1.53-64.2365
Masoud, Mamdouh, Alaa Eldin Ali, Gehan Shaaban Elasala, & Rehab Elsaid Elwardany. "Spectroscopic study of solvent effects on the electronic absorption spectra of morpholine and its complexes." European Journal of Chemistry [Online], 14.1 (2023): 53-64. Web. 28 May. 2023
Masoud, Mamdouh, Ali, Alaa, Elasala, Gehan, AND Elwardany, Rehab. "Spectroscopic study of solvent effects on the electronic absorption spectra of morpholine and its complexes" European Journal of Chemistry [Online], Volume 14 Number 1 (31 March 2023)

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