Abstract: Nanotechnology stands a vital role in the science research and technology development. Carbon Nanotubes (CNTs) is one among the most promising materials in the field of nanotechnology. Mathematically, topological indices are real numbers invariant under graph isomorphism. In QSAR/QSPR study topological indices are utilized to analyze the physical properties of chemical compounds such as boiling point, melting point, heat capacities, molecular refraction, total surface area, etc. Chromatic topological indices of a graph G is a term that has recently been coined [3] to designate a new coloring version to these indices which embrace both proper coloring and topological indices. In this paper we investigate the different types of Zagreb indices for V -Phenylenic nanotube and Phenylenic nanotorus.

Keywords: Zagreb Indices, Phenylenic nanotorus, V-Phenylenic nanotube.

| DOI: 10.17148/IARJSET.2021.8622