Topological properties of some nanostructures

Topological indices are numerical values associated with chemical constitution describing the structures of chemical compounds and helping to predict different physicochemical properties. In this report, some newly designed topological descriptors, namely, neighborhood Zagreb index (M-N), neighborhood version of Forgotten topological index (F-N), modified neighborhood version of Forgotten topological index (F-N*), neighborhood version of second Zagreb index (M-2*), neighborhood version of hyper Zagreb index (HMN) are obtained for the TURC4C8(S), armchair nanotube TUAC(6), V-phenylenic nanotube V PH X[m, n] and V-phenylenic nanotori VPHY[m, n].