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Ali S, Riaz A, Nawaz H, Majeed MI, Iqbal MA, Bhatti HN, Rashid N, Kashif M, Tahir M, Nasir S, Ullah S, Farooq S, Naseem A. Raman spectral characterization of silver metal-based complexes of different benzimidazolium ligands. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 232:118162. [PMID: 32106031 DOI: 10.1016/j.saa.2020.118162] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 02/13/2020] [Accepted: 02/16/2020] [Indexed: 06/10/2023]
Abstract
In this study, Raman spectroscopy has been employed for the characterization of two structurally different monodentate N-heterocyclic carbene ligands (ligand-1 and ligand-2) and their respective complexes (complex-1 and complex-2). The Raman spectral features are found helpful for the confirmation of formation of complexes. The significant Raman spectral features are identified for benzimidazole ring with higher intensities in carbene complexes having more polarizability as compared to their ligands, providing the evidence for the formation of coordinate covalent bond. The successful complexation is further supported by using multivariate data analysis technique, Principal Component Analysis (PCA), which is found very helpful to highlight the variability of Raman spectral data of both ligands and their respective metal complexes from each other. Moreover, the coordination of carbene with Ag(I) is confirmed from the dominant spectral markers of higher intensities at 359 cm-1 in complex-1 and 338 cm-1 in complex-2. The effective and reliable characterization and confirmation of metal complexes indicates the potential of Raman spectroscopy for its use for the characterization of the organometallic complexes and other chemical products.
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Affiliation(s)
- Saqib Ali
- Department of Chemistry, University of Agriculture Faisalabad-38040, Pakistan
| | - Ayesha Riaz
- Department of Chemistry, University of Agriculture Faisalabad-38040, Pakistan
| | - Haq Nawaz
- Department of Chemistry, University of Agriculture Faisalabad-38040, Pakistan.
| | | | | | - Haq Nawaz Bhatti
- Department of Chemistry, University of Agriculture Faisalabad-38040, Pakistan
| | - Nosheen Rashid
- Department of Chemistry, University of Central Punjab, Faisalabad campus, Faisalabad, Pakistan
| | - Muhammad Kashif
- Department of Chemistry, University of Agriculture Faisalabad-38040, Pakistan
| | - Muhammad Tahir
- Department of Chemistry, University of Agriculture Faisalabad-38040, Pakistan
| | - Saira Nasir
- Department of Chemistry, University of Agriculture Faisalabad-38040, Pakistan
| | - Saif Ullah
- Department of Chemistry, University of Agriculture Faisalabad-38040, Pakistan
| | - Sidra Farooq
- Department of Chemistry, University of Agriculture Faisalabad-38040, Pakistan
| | - Ammara Naseem
- Department of Chemistry, University of Agriculture Faisalabad-38040, Pakistan
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