Synthesis and Characterization of Novel Ag(I)-18C6/DB18C6 Complexes

• Published in: Asian Journal of Research in Chemistry 2020-03, Vol.13 (2), p.75-81
• Main Authors: Chitlangia, Seema, Ranjan, Rajeev
• Format: Article
• Language: English
• Subjects: Absorption; Binding sites; Bond energy; Charge transfer; Chemical analysis; Chemical bonds; Conjugation; Coordination compounds; Crypts; Dipole interactions; Donors (electronic); Electron transitions; Electrons; Energy; Energy levels; Ethanol; Infrared analysis; Ligands; Metal ions; NMR; Nuclear magnetic resonance; Orbitals; Organic compounds; Oxygen; Salt; Sodium; Spectral analysis; Spectrum analysis
• ISSN: 0974-4169; 0974-4150
• DOI: 10.5958/0974-4150.2020.00016.4

The bonding pattern and structure of complexes were suggested from elemental analysis, molar conductivity, UV-Vis, IR, and 1H-NMR spectral analysis. Crowns and crypts have the unusual property to form stable complexes with metal ions.1-2 These macrocycles which contain varying combinations of ligating atoms can be tailored to accommodate specific metal ions by the fine tuning of the ligand design features3-5, such as the macrocyclic hole size6, nature of the ligand donors, donor set, donor array, ligand conjugation, ligand substitution, number and sizes of the chelate rings, ligand flexibility, and nature of the ligand backbone7-10. The bond energy in organic compound possess energy equivalent to absorption energy of ultraviolet or visible radiation as they form bonds by ion-dipole interactions and/or involvement of non-bonding electrons with central metal ions.27-29 The electrons of bonding orbitals can go to higher energy by excitement due to absorption of radiation in UV region. The antibonding orbitals a· and n· are quantized energy level of higher energies. Besides bonding electronic transitions, intermolecular transition known as charge transfers (C-T) and M ^ L transitions of high intensity are usually observed in dyes, complex molecule and coordination complexes.30 IR study: