Author: Rosa Santillan

Synthesis and fluorescence emission of neutral and anionic di- and tetra-carboranyl compounds

2011

A new family of photoluminescent neutral and anionic di-carboranyl and tetra-carboranyl derivatives have been synthesized and characterized. The reaction of α,α'-bis(3,5-bis(bromomethyl)phenoxy-m-xylene with 4 equiv. of the monolithium salt of 1-Ph-1,2-C(2)B(10)H(11) or 1-Me-1,2-C(2)B(10)H(11) gives the neutral tetracarboranyl-functionalized aryl ether derivatives closo-1 and closo-2, respectively. The addition of the monolithium salt of 1-Ph-1,2-closo-C(2)B(10)H(11) to α,α,'-dibromo-m-xylene or 2,6-dibromomethyl-pyridine gives the corresponding di-carboranyl derivatives closo-3 and closo-4. These compounds, which contain four or two closo clusters, were degraded using the classical method,…

Boron CompoundsModels MolecularMagnetic Resonance SpectroscopySubstituentSalt (chemistry)Ether010402 general chemistryPhotochemistryCrystallography X-Ray01 natural sciencesInorganic Chemistrychemistry.chemical_compoundPolymer chemistryPyridineMoleculeta116Tetramethylammoniumchemistry.chemical_classificationLuminescent Agents010405 organic chemistry[CHIM.ORGA]Chemical Sciences/Organic chemistryAryl[CHIM.MATE]Chemical Sciences/Material chemistry0104 chemical sciencesSpectrometry FluorescencechemistryCarborane

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Fluorescence of Newo-Carborane Compounds with Different Fluorophores: Can it be Tuned?

2014

Two sets of o-carborane derivatives incorporating fluorene and anthracene fragments as fluorophore groups have been successfully synthesized and characterized, and their photophysical properties studied. The first set, comprising fluorene-containing carboranes 6-9, was prepared by catalyzed hydrosilylation reactions of ethynylfluorene with appropriate carboranylsilanes. The compound 1-[(9,9-dioctyl-fluorene-2-yl)ethynyl]carborane (11) was synthesized by the reaction of 9,9-dioctyl-2-ethynylfluorene and decaborane (B10H14). Furthermore, reactions of the lithium salt of 11 with 1 equivalent of 4-(chloromethyl)styrene or 9-(chloromethyl)anthracene yielded compounds 12 and 13. Members of the se…

AnthraceneHydrosilylationOrganic ChemistrySubstituentGeneral ChemistryFluorenePhotochemistryFluorescenceMedicinal chemistryCatalysisDilithiumchemistry.chemical_compoundchemistryDecaboraneCarboraneta116Chemistry - A European Journal

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A versatile methodology for the controlled synthesis of photoluminescent high-boron-content dendrimers.

2013

Fluorescent star-shaped mol- ecules and dendrimers with a 1,3,5-tri- phenylbenzene moiety as the core and 3 or 9 carborane derivatives at the pe- riphery, have been prepared in very good yields by following different ap- proaches. One procedure relies on the nucleophilic substitution of Br groups in 1,3,5-tris(4-(3-bromopropoxy)phe- nyl)benzene with the monolithium salts of methyl and phenyl-o-carborane. The second method is the hydrosilylation reactions on the peripheral allyl ether functions of 1,3,5-tris(4-allyloxy-phe- nyl)benzene and 1,3,5-tris(4-(3,4,5-tris- AAA with suitable carboranyl-silanes to produce different generations of dendrimers decorated with carboranyl fragments. This ap…

HydrosilylationOrganic ChemistrySubstituentchemistry.chemical_elementEtherGeneral ChemistryPhotochemistryCatalysischemistry.chemical_compoundchemistryDendrimerPolymer chemistryCarboraneMoietyBoronta116MacromoleculeChemistry (Weinheim an der Bergstrasse, Germany)

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