A5090837396- Graphene research and applications
- Fullerene Chemistry and Applications
- Carbon Nanotubes in Composites
- Molecular Junctions and Nanostructures
- Supramolecular Chemistry and Complexes
- 2D Materials and Applications
- Synthesis and Properties of Aromatic Compounds
- Molecular Sensors and Ion Detection
- Porphyrin and Phthalocyanine Chemistry
- Organic and Molecular Conductors Research
- MXene and MAX Phase Materials
- Supramolecular Self-Assembly in Materials
- Luminescence and Fluorescent Materials
- Force Microscopy Techniques and Applications
- Advanced biosensing and bioanalysis techniques
- Conducting polymers and applications
- Mechanical and Optical Resonators
- Boron and Carbon Nanomaterials Research
- Fiber-reinforced polymer composites
- Magnetism in coordination complexes
- Organic Electronics and Photovoltaics
- Gas Sensing Nanomaterials and Sensors
- Perovskite Materials and Applications
- Crystallography and molecular interactions
- Advanced Photocatalysis Techniques
Madrid Institute for Advanced Studies
2016-2025
IMDEA Nanoscience
2016-2025
NOAA Chemical Sciences Laboratory
2024
Missouri University of Science and Technology
2022
Faraday Technology (United States)
2021
Universitat Jaume I
2021
Universidad Autónoma de Madrid
2017-2020
Universidad Complutense de Madrid
2006-2014
Universitat de València
2009-2013
Institut Català d'Investigació Química
2010
Schiff-condensation reactions carried out between 1,6-diaminopyrene (DAP) and the tritopical 1,3,5 benzenetricarbaldehyde (BTCA) or 2,4,6-triformylphloroglucinol (TP) ligands give rise to formation of two-dimensional imine-based covalent-organic frameworks (COFs), named IMDEA-COF-1 -2, respectively. These materials show dramatic layer-packing-driven fluorescence in solid state arising from three-dimensional arrangement pyrene units among layers. Layer stacking within these 2D-COF either...
Abstract Custom‐made macrocyclic receptors for fullerenes are proving a valuable alternative to achieve the affinity and selectivity required meet challenges such as selective extraction of higher fullerenes, their chiral resolution, or self‐assembly functional molecular materials. In this Minireview, we highlight some important breakthroughs that class fullerene hosts has already produced.
A novel type of mechanical switch is described in which light-induced translation a macrocycle [2]rotaxane quenches anthracene fluorescence. Features the system include remarkable 200:1 difference fluorescence intensity between two positional states molecule (∼85:1 one isomer and photostationary state). In principle same concept could be used for mechanically switching virtually any property that can influenced by functional group proximity effects.
Beleuchten eines mechanischen Ereignisses: Filme Polymer-Rotaxan-Konjugats wurden auf Quarzplättchen gegossen und mit Aluminiummasken bedeckt; die nichtabgedeckten Flächen DMSO-Dampf ausgesetzt. Das Lösungsmittel bewirkt eine Änderung der Position des Makrocyclus im molekularen Shuttle, "An"-Zustände Rotaxanfluoreszenz in den zur Folge hat (siehe Bild). Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2001/2005/z500101_s.pdf or from...
The first exTTF-based receptor for molecular recognition of fullerene is described. Unexpectedly, the shows completely different binding modes in chlorobenzene and CHCl3/CS2 mixtures. In aromatic solvent, binds C60 a noncooperative fashion (nH = 1) with Kassoc (2.98 +/- 0.12) x 103 M-1, whereas mixtures, it marked positive homotropic cooperative effect 2.7) toward C60, an apparent constant (3.56 0.16) M-1. unique solvent-switchable behavior our might find use controlled self-assembly...
Fullerenes do the conga! Synthesis and self-recognition of a monomer featuring specially designed receptor for [60]fullerene are described. The self-assembles in head-to-tail fashion through π–π interactions, thus forming linear oligomeric species solution (see image). formation this redox-amphoteric supramolecular polymer represents new approach to controlled organization electroactive materials. Supporting information article is available on WWW under...
Exploiting the shape and electronic complementarity of C(60) C(70) with π-extended derivatives tetrathiafulvalene (exTTF), we have very recently reported a macrocyclic receptor featuring two exTTF recognizing units which forms 1:1 complexes log K(a) = 6.5 ± 0.5 in chlorobenzene at 298 K. This represents one highest binding constants toward to date world-record for all-organic receptors. Here, describe our efforts fine-tune bis-exTTF hosts bind and/or C(70), through structural variations. On...
Abstract The fabrication of van der Waals heterostructures, artificial materials assembled by individual stacking 2D layers, is among the most promising directions in research. Until now, widespread approach to stack layers relies on deterministic placement methods, which are cumbersome and tend suffer from poor control over lattice orientations presence unwanted interlayer adsorbates. Here, we present a different fabricate ultrathin heterostructures exfoliation bulk franckeite naturally...
We report on the large-scale synthesis of highly oriented ultrathin MoO3 layers using a simple and low-cost atmospheric pressure by van der Waals epitaxy growth muscovite mica substrates. By this method we are able to synthetize high quality centimeter-scale crystals with thicknesses ranging from 1.4 nm (two layers) up few nanometers. The can be easily transferred an arbitrary substrate (such as SiO2) deterministic transfer extensively characterized demonstrate resulting crystal. also study...
The physical properties of ultrathin transition metal dichalcogenides (2D-TMDCs) make them promising candidates as active nanomaterials for catalysis, optoelectronics, and biomedical applications. Chemical modification TMDCs is expected to be key in modifying/adding new functions that will help such promise a reality. We present mild method the basal planes 2H-MoS2 WS2. exploit soft nucleophilicity sulfur react it with maleimide derivatives, achieving covalent functionalization 2H-TMDCs...
A two-dimensional imine-linked covalent organic framework bearing pyrene has been prepared and exfoliated in water as nanosheets to produce a stable colloid. As proof-of-concept, this COF colloid used detect the presence of several dyes polynitro-aromatic derivatives. These results show high potential these nanomaterials for applications chemical sensing pollutants directly water.
Abstract Spin crossover (SCO) molecules are promising nanoscale magnetic switches due to their ability modify spin state under several stimuli. However, SCO systems face bottlenecks when downscaling into spintronic devices: instability at the nanoscale, insulating character and lack of control positioning nanocrystals in nanodevices. Here we show encapsulation robust Fe-based within 1D cavities single-walled carbon nanotubes (SWCNT). We find that mechanism endures individual heterostructures...
Characterizing functionalized 2D materials is not easy. We present a critical overview of the challenges, spectroscopic, microscopic and analytical techniques available practical examples in literature to illustrate their correct use.
We present a computational tool to automatically analyze the Raman spectra of nanomaterials. The software manages hundreds simultaneously providing statistical information main spectral features and publication-ready figures.
Although various methods for switching the positions of macrocycles in bistable rotaxane-based molecular shuttles have been developed, exploiting such movements to trigger property changes has thus far received little attention. Here we describe one first examples a change achieved through controlled large-amplitude translational motion rotaxane; novel type chiroptical switch is described, which light-induced translation macrocycle along thread [2]rotaxane produces strong induced circular...
The cap fits! A new class of concave π-extended tetrathiafulvalene (TTF) derivatives, truxene-TTFs, were prepared and characterized, their self-assembly with fullerenes was investigated (see picture). Truxene-TTFs represent the first example TTF-related electron donors that serve, without chemical modification, as monotopic receptors for in solution. Supporting information this article is available on WWW under http://www.wiley-vch.de/contents/jc_2002/2007/z604327_s.pdf or from author....
We describe the synthesis and supramolecular properties of a bifurcated molecule decorated with two units an in-house receptor for [60]fullerene, based on electron donor exTTF, PC61BA derivative as recognizing units. This monomer self-assembles to form arborescent dynamically polydisperse aggregates, mainly through π−π interactions. constitutes fundamentally novel kind organization electroactive materials that lies at interface between dendrimers polymers.
A receptor for fullerenes featuring three exTTF units linked to a CTV scaffold is described. The exTTF-CTV host forms remarkably stable complexes with both C(60) (log K(a) = 5.3 +/- 0.2) and C(70) 6.3 0.6). Light-induced ESR spectra demonstrate that intracomplex PET processes take place in solution.
On the ball: Charge transfer occurs readily in tightly interacting complexes formed from π-extended tetrathiafulvalenes, which act as pincerlike receptors, and C60 a variety of solvents upon photoexcitation (see picture; PET=photoelectron transfer). It should be feasible to construct simple photovoltaic devices systems based on similar recognition motifs. Detailed facts importance specialist readers are published "Supporting Information". Such documents peer-reviewed, but not copy-edited or...
An exTTF-based macrocyclic receptor that associates C(60) with a binding constant >10(6) M(-1) in chlorobenzene at room temperature is described. This represents an improvement of 3 orders magnitude respect to the previous examples receptors and one highest constants toward reported date.