Computing the Energy and Estrada Index of Different Molecular Structures. (28th January 2022)

• Record Type: Journal Article
• Authors: Mufti, Zeeshan Saleem; Anjum, Rukhshanda; Xin, Qin; Tchier, Fairouz; Anwar-ul-Haq, Iram; Gaba, Yaé Ulrich
• Other Names: Ali Haidar Academic Editor.
• Is Part Of: Journal of chemistry. Volume 2022(2022)
• Publication Date: 2022-01-28
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1155/2022/6227093
• Languages: English
• ISSNs: 2090-9063

Abstract

Abstract : Graph energy is an invariant that is derived from the spectrum of the adjacency matrix of a graph. Graph energy is actually the absolute sum of all the eigenvalues of the adjacency matrix of a graph i.e. E = ∑ i = 1 n λ i, and the Estrada index of a graph G is elaborated as EE G = ∑ i = 1 n e λ i, where, λ 1, λ 2, …, λ n are the eigenvalues of the adjacency matrix of a graph. In this paper, energy E G and Estrada index EE G of different molecular structures are obtained and also established inequalities among the exact and estimated values of energies and Estrada index of TUC 4 C 8 nanosheet and naphthalene.