High-Boron-Content Porphyrin-Cored Aryl Ether Dendrimers: Controlled Synthesis, Characterization, and Photophysical Properties

Justo Cabrera-González, Elba Xochitiotzi-Flores, Clara Viñas, Francesc Teixidor, Héctor García-Ortega, Norberto Farfán, Rosa Santillan, Teodor Parella, Rosario Núñez

    Research output: Contribution to journalArticleResearchpeer-review

    18 Citations (Scopus)

    Abstract

    © 2015 American Chemical Society. The synthesis and characterization of a set of poly(aryl ether) dendrimers with tetraphenylporphyrin as the core and 4, 8, 16, or 32 closo-carborane clusters are described. A regioselective hydrosilylation reaction on the allyl-terminated functions with carboranylsilanes in the presence of Karstedt's catalyst leads to different generations of boron-enriched dendrimers. This versatile approach allows the incorporation of a large number of boron atoms in the dendrimers' periphery. Translational diffusion coefficients (D) determined by DOSY NMR experiments permit estimation of the hydrodynamic radius (R<inf>H</inf>) and molecular size for each dendrimer. Furthermore, a notable correlation between D and the molecular weight (MW) is found and can be used to predict their overall size and folding properties. The UV-vis and emission behavior are not largely affected by the functionalization, therefore implying that the presence of carboranes does not alter their photoluminescence properties. (Graph Presented).
    Original languageEnglish
    Pages (from-to)5021-5031
    JournalInorganic Chemistry
    Volume54
    Issue number10
    DOIs
    Publication statusPublished - 18 May 2015

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