Author: Arántzazu González-campo

Synthesis of small carboranylsilane dendrons as scaffolds for multiple functionalizations.

2006

Small carbosilane dendrons in which a closo-carborane is located at the focal point have been prepared by a sequence of steps involving hydrosilylation and reduction reactions. These compounds are used as scaffolds for peripheral functionalization with styrene, chlorovinylstyrene, or suitable carboranes, while keeping the C(cluster)-Si (C(c)-Si) bond. Modification of the core by reduction of the carborane with Mg/BrCH2CH2Br was also achieved.

chemistry.chemical_compoundChemistryHydrosilylationOrganic ChemistryCarboraneOrganic chemistrySurface modificationSequence (biology)Physical and Theoretical ChemistryBiochemistryCombinatorial chemistryStyreneOrganic letters

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Controlled Direct Synthesis of C-Mono- and C-Disubstituted Derivatives of [3,3′-Co(1,2-C2B9H11)2]− with Organosilane Groups: Theoretical Calculations…

2008

Mono- and dilithium salts of [3,3'-Co(1,2-C(2)B(9)H(11))(2)](-), (1(-)), react with different chlorosilanes (Me(2)SiHCl, Me(2)SiCl(2), Me(3)SiCl and MeSiHCl(2)) with an accurate control of the temperature to give a set of novel C(c)-mono- (C(c) = C(cluster)) and C(c)-disubstituted cobaltabis(dicarbollide) derivatives with silyl functions: [1-SiMe(2)H-3,3'-Co(1,2-C(2)B(9)H(10))(1',2'-C(2)B(9)H(11))](-) (3(-)); [1,1'-mu-SiMe(2)-3,3'-Co(1,2-C(2)B(9)H(10))(2)](-) (4(-)); [1,1'-mu-SiMeH-3,3'-Co(1,2-C(2)B(9)H(10))(2)](-) (5(-)); [1-SiMe(3)-3,3'-Co(1,2-C(2)B(9)H(10))(1',2'-C(2)B(9)H(11))](-) (6(-)) and [1,1'-(SiMe(3))(2)-3,3'-Co(1,2-C(2)B(9)H(10))(2)](-) (7(-)). In a similar way, the [8,8'-mu-(1''…

SilylationIntramolecular reaction010405 organic chemistryMeso compoundStereochemistryOrganic ChemistryGeneral Chemistry010402 general chemistry01 natural sciencesMedicinal chemistryCatalysis0104 chemical sciencesDilithiumchemistry.chemical_compoundchemistryDensity functional theoryStoichiometryChlorosilaneChemistry - A European Journal

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Modular Construction of Neutral and Anionic Carboranyl-Containing Carbosilane-Based Dendrimers

2007

A modular construction of new carbosilane dendrimers, which contain four and eight peripheral carborane derivatives and propyl linkages between the C cluster and the Si atoms, has been developed using different methodologies. Regiospecific hydrosilylation of 1-C 6 H 5 -2-(CH 2 CH=CH 2 )-1,2-closo-C 2 B 10 H 10 (1) and 1-CH 3 -2-(CH 2 CH=CH 2 )-1,2-closo-C 2 B 10 H 10 (2) offers an efficient route to molecular precursors and building blocks that can provide both divergent and convergent strategies for dendritic growth. First generations of neutral carboranyl-containing dendrimers were constructed by two approaches: (a) a divergent approach via hydrosilylation of 1 and 2 with the first genera…

Polymers and PlasticsHydrosilylationOrganic ChemistryOligomerInorganic Chemistrychemistry.chemical_compoundEnd-groupchemistryDendrimerYield (chemistry)Polymer chemistryMaterials ChemistryCluster (physics)MoleculeCarboraneMacromolecules

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Carboranyl Substituted Siloxanes and Octasilsesquioxanes: Synthesis, Characterization, and Reactivity

2008

Carboranyl-containing disiloxane, cyclic-siloxane and cage-like silsesquioxane have been prepared in high yields. Two routes are compared for their preparation, a classical hydrolytic process based on hydrolysis and condensation of the freshly prepared carboranylalkylchlorosilane and ethoxysilane precursors and a nonhydrolytic route based on the specific reactivity of chorosilane toward DMSO. Based on the typical reactivity of the carboranyl group toward nucleophiles, dianionic disiloxanes and octaanionic silsesquioxanes were obtained without modification of the siloxane bond. Products are fully characterized by FTIR, NMR and MALDI-TOF methods.

Polymers and Plastics010405 organic chemistryOrganic ChemistryChemical modification[CHIM.MATE]Chemical Sciences/Material chemistryDisiloxane010402 general chemistry01 natural sciencesSilsesquioxane0104 chemical sciencesInorganic Chemistrychemistry.chemical_compound[CHIM.POLY]Chemical Sciences/PolymersNucleophilechemistrySiloxanePolymer chemistryMaterials ChemistryCarboraneOrganic chemistryMolecule[CHIM.COOR]Chemical Sciences/Coordination chemistryReactivity (chemistry)ComputingMilieux_MISCELLANEOUSMacromolecules

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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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CCDC 1425778: Experimental Crystal Structure Determination

2015

Related Article: Arántzazu González-Campo, Emilio José Juárez-Pérez, Clara Viñas, Bruno Boury, Reijo Sillanpää, Raikko Kivekäs and Rosario Núñez|2008|Macromolecules|41|8458|doi:10.1021/ma801483c

Space GroupCrystallographyCrystal SystemCrystal Structure1133-tetramethyl-13-bis(3-(2-methyl-12-dicarba-closo-dodecaborane(10)-1-yl)propyl)disiloxaneCell ParametersExperimental 3D Coordinates

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