No abstract

This paper presents the syntheses, the photophysical and the electrochemical characterizations of four new mono-and diplatinum polyynediyl complex chromophores end-capped with diphenylpyranylidene and pentafluorophenyl moieties. The nonlinear optical properties (NLO) of these compounds is investigated using the Electric-Field-Induced Second Harmonic generation (EFISH) technique and their experimental optical properties are confirmed by Time-Dependent Density Functional Theory (TD-DFT) with a range-separated hybrid. All complexes show positive µβ values. While the inductive electron-withdrawing pentafluorophenyl ligand, the length of the polyyne linkers and the number of platinum centers do not seem to significantly affect the NLO responses of these complexes, their structural configuration plays a significant role, as shown by the V-shaped complex 10 exhibiting the highest µβ value of the series of complexes, twice as high as that of the linear complex 9.

This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.