Staff directory Thais María Grancha Marco

Thais María Grancha Marco

Postdoctoral Researcher
JDC-I
thais.grancha(ELIMINAR)@icn2.cat
Supramolecular NanoChemistry and Materials

Publications

2019

  • Phase Transfer of Rhodium(II)-Based Metal-Organic Polyhedra Bearing Coordinatively Bound Cargo Enables Molecular Separation

    Grancha T., Carné-Sánchez A., Hernández-López L., Albalad J., Imaz I., Juanhuix J., Maspoch D. Journal of the American Chemical Society; 141 (45): 18349 - 18355. 2019. 10.1021/jacs.9b10403. IF: 14.695

    The transfer of nanoparticles between immiscible phases can be driven by externally triggered changes in their surface composition. Interestingly, phase transfers can enhance the processing of nanoparticles and enable their use as vehicles for transporting molecular cargo. Herein we report extension of such phase transfers to encompass porous metal-organic polyhedra (MOPs). We report that a hydroxyl-functionalized, cuboctahedral Rh(II)-based MOP can be transferred between immiscible phases by pH changes or by cation-exchange reactions. We demonstrate use of this MOP to transport coordinatively bound cargo between immiscible layers, including into solvents in which the cargo is insoluble. As proof-of-concept that our phase-transfer approach could be used in chemical separation, we employed Rh(II)-based MOPs to separate a challenging mixture of structurally similar cyclic aliphatic (tetrahydrothiophene) and aromatic (thiophene) compounds. We anticipate that transport of coordinatively bound molecules will open new avenues for molecular separation based on the relative coordination affinity that the molecules have for the Rh(II) sites of MOP. Copyright © 2019 American Chemical Society.


  • Protection strategies for directionally-controlled synthesis of previously inaccessible metal-organic polyhedra (MOPs): The cases of carboxylate: The amino-functionalised Rh(ii)-MOPs

    Albalad J., Carné-Sánchez A., Grancha T., Hernández-López L., Maspoch D. Chemical Communications; 55 (85): 12785 - 12788. 2019. 10.1039/c9cc07083d. IF: 6.164

    Herein we report that strategic use of protecting groups in coordination reactions enables directional inhibition that leads to synthesis of highly functionalised metal-organic polyhedra (MOPs), rather than of the extended coordination networks. Using this approach, we functionalised two new porous cuboctahedral Rh(ii)-based MOPs with 24 peripheral carboxylic acid groups or 24 peripheral amino groups. This journal is © The Royal Society of Chemistry.


  • Synthesis of a chiral rod-like metal–organic framework from a preformed amino acid-based hexanuclear wheel

    Grancha T., Ferrando-Soria J., Armentano D., Pardo E. Journal of Coordination Chemistry; 72 (8): 1204 - 1221. 2019. 10.1080/00958972.2019.1575371. IF: 1.685

    We report the two-step synthesis of a chiral rod-like metal-organic framework (MOF). The chemical approach consists on the use of a previously prepared oxamato-based homochiral hexanuclear wheel, the ligand being a derivative of the natural amino acid l-alanine, with formula (Me4N)6{CuII6[(S)-alama])6}·10H2O (1) [where (S)-alama=(S)-N-(ethyl oxoacetate)alanine]. The anionic hexacopper(II) wheels, stabilized by the presence of templating tetramethylammonium counter-cations, disassemble in the presence of cationic square-planar [Ni(cyclam)]2+ complexes to yield, after a supramolecular reorganization process that involves axial coordination of the [Ni(cyclam)]2+ cations through the free carbonyl groups of the copper(II) moieties, a neutral chiral rod-like, three-dimensional (3D) MOF with formula [Ni(cyclam)][Cu(S)-alama]2·16H2O (2). The resulting MOF constitutes one of the few examples where such a high-nuclearity metal complex is used as precursor for the construction of rod-like MOFs. © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group.


2018

  • Zigzag Ligands for Transversal Design in Reticular Chemistry: Unveiling New Structural Opportunities for Metal-Organic Frameworks

    Guillerm V., Grancha T., Imaz I., Juanhuix J., Maspoch D. Journal of the American Chemical Society; 140 (32): 10153 - 10157. 2018. 10.1021/jacs.8b07050. IF: 14.357

    Herein we describe the topological influence of zigzag ligands in the assembly of Zr(IV) metal-organic frameworks (MOFs). Through a transversal design strategy using reticular chemistry, we were able to synthesize a family of isoreticular Zr(IV)-based MOFs exhibiting the bcu - rather than the fcu - topology. Our findings underscore the value of the transversal parameter in organic ligands for dictating MOF architectures. © 2018 American Chemical Society.