Comment on 'Organometallic Complexes for Nonlinear Optics. 45. Dispersion of the Third-order Nonlinear Optical Properties of Triphenylamine-cored Alkynylruthenium Dendrimers' - Increasing the Nonlinear Optical Response by Two Orders of Magnitude

摘要

In a recent paper published in this journal, Roberts et. al. report on a "dramatic enhancement of the two-photon absorption merit upon embedding metal centers through a dendritic architecture Roberts et. al. investigate the impact of π-system lengthening through metal centers for three systematically varied triphenylamine-cored alkynylruthenium dendrimers upon the two-photon absorption (TPA) properties of the structures. The authors recognize the need for scaling the TPA cross-section data with the "effective number of electrons" to allow a comparison of the "TPA merit of structurally and compositionally diverse molecules". We show that when analyzed under the effects of simple scaling, the properties of triphenylamine-cored alkynylruthenium dendrimers exhibit an unprecedented improvement over their non-metal-core cousins.