PI index of tetrathiafulvalene dendrimers

Department of Mathematics, Statistics and Computer Science, Faculty of Science, University of Kashan. Kashan 87317-51167, I. R. Iran Manuscript received 5 October 2010, accepted 6 October 2010 The Padmakar-lvan (PI) index of a graph G is defined as PI(G) = ∑ e=uv[mu(e) + mv(e)], where mu (e) is the number of edges of G lying closer to u than to v, mv(e) is defined analogously and summation goes over all edges of G. In this paper, the PI index of tetrathiafulvalene (TTF) dendrimer Is computed, whereby TTF units were employed as branching centers.

Keywords

Dendrimer, PI index

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