The Electron Affinity Energy of Aromatic Hydrocarbon; Rylenes

Aromatic hydrocarbon from the root of benzene can provide suitable environments for electron transition due to p orbitals, upper and lower electron clouds, and resonance phenomenon. Rylenes is a family of organic molecules with the chemical formula of C10nH4n+4which is focused in nanomedicines.Topological Indices, introduced in chemistry science using molecular graphs, are real numbers and constant [1]. The RRR index (Reduced Reciprocal Randic) has been firstly defined by Ivan Gutman in 2014 [2].Consider simple graph of Rylenes (C10nH4n+4) as presented in Figure 1. It is first tried to produce a relationship between the RRR indexesbased on the number of rings (n) as the following: RRR(G)  (16 4 2)n 8 (1) Then RRR index is measured for Rylenes usingequation (1). The electron affinity energy (Eaff) of Rylenes was calculated using Gaussian 09 software and data were compared with those mentioned in valid papers[3]. Figure 2 shows the changes in Eaff ofRylenesaccording to the RRR index. Therefore, Eaff ofRylenescould be well predicted by the following equation: 1.1516   3.1243