Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Inhar Imaz is active.

Publication


Featured researches published by Inhar Imaz.


Nature Chemistry | 2013

A spray-drying strategy for synthesis of nanoscale metal–organic frameworks and their assembly into hollow superstructures

Arnau Carné-Sánchez; Inhar Imaz; Mary Cano-Sarabia; Daniel Maspoch

Metal-organic frameworks (MOFs) are among the most attractive porous materials known today. Their miniaturization to the nanoscale--into nanoMOFs--is expected to serve myriad applications from drug delivery to membranes, to open up novel avenues to more traditional storage and catalysis applications, and to enable the creation of sophisticated superstructures. Here, we report the use of spray-drying as a versatile methodology to assemble nanoMOFs, yielding spherical hollow superstructures with diameters smaller than 5 µm. This strategy conceptually mimics the emulsions used by chemists to confine the synthesis of materials, but does not require secondary immiscible solvents or surfactants. We demonstrate that the resulting spherical, hollow superstructures can be processed into stable colloids, whose disassembly by sonication affords discrete, homogeneous nanoMOFs. This spray-drying strategy enables the construction of multicomponent MOF superstructures, and the encapsulation of guest species within these superstructures. We anticipate that this will provide new routes to capsules, reactors and composite materials.


Chemical Communications | 2011

Metal–biomolecule frameworks (MBioFs)

Inhar Imaz; Marta Rubio-Martínez; Jihyun An; Isabel Solé-Font; Nathaniel L. Rosi; Daniel Maspoch

Biomolecules are the building blocks of life. Nature has evolved countless biomolecules that show promise for bridging metal ions. These molecules have emerged as an excellent source of biocompatible building blocks that can be used to design Metal-Biomolecule Frameworks (MBioFs). This feature article highlights the advances in the synthesis of this class of MOFs. Special emphasis is provided on the crystal structures of these materials, their miniaturization to the submicron length scale, and their new potential storage, catalytic, and biomedical applications.


Angewandte Chemie | 2009

Metal–Organic Spheres as Functional Systems for Guest Encapsulation†

Inhar Imaz; Jordi Hernando; Daniel Ruiz-Molina; Daniel Maspoch

Music of the spheres: Infinite coordination polymerization of Zn(2+) ions and a multitopic ligand produces metal-organic micro- and nanospheres that can be used as functional matrices. The spheres can encapsulate combinations of active substances, such as organic dyes, magnetic nanoparticles, or luminescent quantum dots (see image), which results in spheres that are luminescent in the blue, green, and red regions of the spectrum.


Angewandte Chemie | 2008

Valence-Tautomeric Metal–Organic Nanoparticles†

Inhar Imaz; Daniel Maspoch; Clara Rodríguez‐Blanco; José Manuel Pérez‐Falcón; Javier Campo; Daniel Ruiz-Molina

This work was supported by projects MAT2006-13765. D.M. thanks the Ministerio de Ciencia y Tecnologia for a RyC contract. The authors thank the Servei de Microscopia of the UAB, Serveis Cientifico-Tecnics of the UB, and the Laboratori de Nanotecnologia de MATGAS. I.I. thanks the ICN for financial support.


Journal of the American Chemical Society | 2009

Amino Acid Based Metal−Organic Nanofibers

Inhar Imaz; Marta Rubio-Martínez; Wojciech J. Saletra; David B. Amabilino; Daniel Maspoch

Long chiral metal-organic nanofibers can be grown using conventional coordination chemistry and biologically derived components in a diffusion controlled growth procedure.


Journal of the American Chemical Society | 2011

Single-Crystal Metal−Organic Framework Arrays

Carlos Carbonell; Inhar Imaz; Daniel Maspoch

A novel, versatile pen-type lithography-based methodology was developed to control the growth of HKUST-1 crystals on surfaces by direct delivery of femtoliter droplets containing both inorganic and organic building block precursors. This approach shows that through the use of surfaces with low wettability it is possible to control the crystallization of a single submicrometer metal-organic framework crystal at a desired location on a surface.


Journal of the American Chemical Society | 2011

Coordination Polymer Nanofibers Generated by Microfluidic Synthesis

Josep Puigmartí-Luis; Marta Rubio-Martínez; Urs Hartfelder; Inhar Imaz; Daniel Maspoch; Petra S. Dittrich

One-dimensional coordination polymer nanostructures are an emerging class of nanoscale materials with many potential applications. Here, we report the first case of coordination polymer nanofibers assembled using microfluidic technologies. Unlike common synthetic procedures, this approach enables parallel synthesis with an unprecedented level of control over the coordination pathway and facilitates the formation of 1D coordination polymer assemblies at the nanometer length scale. Finally, these nanostructures, which are not easily constructed with traditional methods, can be used for various applications, for example as templates to grow and organize functional inorganic nanoparticles.


Angewandte Chemie | 2015

Post‐Synthetic Anisotropic Wet‐Chemical Etching of Colloidal Sodalite ZIF Crystals

Civan Avci; Javier Aríñez-Soriano; Arnau Carné-Sánchez; Vincent Guillerm; Carlos Carbonell; Inhar Imaz; Daniel Maspoch

Controlling the shape of metal-organic framework (MOF) crystals is important for understanding their crystallization and useful for myriad applications. However, despite the many advances in shaping of inorganic nanoparticles, post-synthetic shape control of MOFs and, in general, molecular crystals remains embryonic. Herein, we report using a simple wet-chemistry process at room temperature to control the anisotropic etching of colloidal ZIF-8 and ZIF-67 crystals. Our work enables uniform reshaping of these porous materials into unprecedented morphologies, including cubic and tetrahedral crystals, and even hollow boxes, by an acid-base reaction and subsequent sequestration of leached metal ions. Etching tests on these ZIFs reveal that etching occurs preferentially in the crystallographic directions richer in metal-ligand bonds; that, along these directions, the etching rate tends to be faster on the crystal surfaces of higher dimensionality; and that the etching can be modulated by adjusting the pH of the etchant solution.


Chemistry: A European Journal | 2015

Synthesis, culture medium stability, and in vitro and in vivo zebrafish embryo toxicity of metal-organic framework nanoparticles.

Angels Ruyra; Amirali Yazdi; Jordi Espín; Arnau Carné-Sánchez; Nerea Roher; Julia Lorenzo; Inhar Imaz; Daniel Maspoch

Metal-organic frameworks (MOFs) are among the most attractive porous materials available today. They have garnered much attention for their potential utility in many different areas such as gas storage, separation, catalysis, and biomedicine. However, very little is known about the possible health or environmental risks of these materials. Here, the results of toxicity studies on sixteen representative uncoated MOF nanoparticles (nanoMOFs), which were assessed for cytotoxicity to HepG2 and MCF7 cells in vitro, and for toxicity to zebrafish embryos in vivo, are reported. Interestingly, there is a strong correlation between their in vitro toxicity and their in vivo toxicity. NanoMOFs were ranked according to their respective in vivo toxicity (in terms of the amount and severity of phenotypic changes observed in the treated zebrafish embryos), which varied widely. Altogether these results show different levels of toxicity of these materials; however, leaching of solubilized metal ions plays a main role.


Journal of the American Chemical Society | 2013

Relaxometry studies of a highly stable nanoscale metal-organic framework made of Cu(II), Gd(III), and the macrocyclic DOTP.

Arnau Carné-Sánchez; Célia S. Bonnet; Inhar Imaz; Julia Lorenzo; Éva Tóth; Daniel Maspoch

The macrocyclic ligand DOTP is used to assemble a porous, heterometallic metal-organic framework (MOF). This MOF is miniaturizable down to the nanoscale to form stable colloids, is stable in physiological saline solution and cell culture media, and is not cytotoxic. It shows interesting relaxometric properties with r1 at high field (500 MHz) of 5 mM(-1)·s(-1) and a maximum r1 = 15 mM(-1)·s(-1) at 40 MHz, which remains constant over a wide pH range and increases with temperature.

Collaboration


Dive into the Inhar Imaz's collaboration.

Top Co-Authors

Avatar

Daniel Maspoch

Spanish National Research Council

View shared research outputs
Top Co-Authors

Avatar

Arnau Carné-Sánchez

Spanish National Research Council

View shared research outputs
Top Co-Authors

Avatar

Daniel Ruiz-Molina

Spanish National Research Council

View shared research outputs
Top Co-Authors

Avatar

Javier Pérez-Carvajal

Spanish National Research Council

View shared research outputs
Top Co-Authors

Avatar

Marta Rubio-Martínez

Spanish National Research Council

View shared research outputs
Top Co-Authors

Avatar

Carlos Carbonell

Spanish National Research Council

View shared research outputs
Top Co-Authors

Avatar

Luis Garzón-Tovar

Spanish National Research Council

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Researchain Logo
Decentralizing Knowledge