A5003353065- Porphyrin and Phthalocyanine Chemistry
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Luminescence and Fluorescent Materials
- Photochemistry and Electron Transfer Studies
- Photochromic and Fluorescence Chemistry
- Molecular Junctions and Nanostructures
- Strong Light-Matter Interactions
- Supramolecular Self-Assembly in Materials
- Fullerene Chemistry and Applications
- Perovskite Materials and Applications
- Synthesis and Properties of Aromatic Compounds
- Magnetism in coordination complexes
- Photosynthetic Processes and Mechanisms
- Surface Chemistry and Catalysis
- Metal-Catalyzed Oxygenation Mechanisms
- Photoreceptor and optogenetics research
- Axial and Atropisomeric Chirality Synthesis
- Organic Chemistry Cycloaddition Reactions
- Organic Electronics and Photovoltaics
- Autophagy in Disease and Therapy
- Endoplasmic Reticulum Stress and Disease
- Lignin and Wood Chemistry
- Organic Light-Emitting Diodes Research
- Liquid Crystal Research Advancements
Universidad Autónoma de Madrid
2016-2024
Eindhoven University of Technology
2024
Madrid Institute for Advanced Studies
2020
University of Padua
2019
Instituto de Catálisis y Petroleoquímica
2019
IMDEA Nanoscience
2016
A 1,1,4,4-tetracyanobuta-1,3-diene (TCBD)-aniline moiety has been introduced, for the first time, at axial position of two subphthalocyanines (SubPcs) peripherally substituted with hydrogen (H12SubPc) or fluorine atoms (F12SubPc). Single-crystal X-ray analysis both SubPc-TCBD-aniline systems showed that each conjugate is a racemic mixture atropisomers resulting from almost orthogonal geometry adopted by TCBD unit, which were separated chiral high-performance liquid chromatography....
Misfolding of secretory proteins in the endoplasmic reticulum (ER) features many human diseases. In α 1 -antitrypsin deficiency, pathogenic Z variant aberrantly assembles into polymers hepatocyte ER, leading to cirrhosis. We show that undergo a liquid:solid phase transition, forming protein matrix retards mobility ER by size-dependent molecular filtration. The Z-α transition is promoted during stress an ATF6-mediated unfolded response. Furthermore, chaperone calreticulin promotes...
Heptazine derivatives have attracted significant interest due to their small S1-T1 gap, which contributes unique electronic and optical properties. However, the nature of lowest excited state remains ambiguous. In present study, we characterize transition heptazine by its magnetic dipole moment. To measure moment, flat must be chiroptically active, is difficult achieve for single molecules. Therefore, used supramolecular polymerization as an approach make homochiral stacks derivatives. Upon...
We report the stereoisomerism and physicochemical properties of two novel electron donor–acceptor conjugates based on subphthalocyanines decorated at their peripheral, or peripheral/axial positions with multiple tetracyanobutadiene–aniline moieties.
The development of chiral materials is severely limited by the challenge to achieve enantiopure derivatives with both configurational stability and good optoelectronic properties. Herein we demonstrate that subphthalocyanines (SubPcs) fulfill such demanding requirements bear prospect becoming components technologies. Particularly, describe synthesis SubPcs assess impact chirality on aspects as fundamental supramolecular organization, behavior in contact metallic surfaces, on-surface...
The synergy of panchromatic absorption throughout most the visible range solar spectrum and intramolecular singlet fission (SF) has been realized in a series conjugates featuring different light-harvesting subphthalocyanines (SubPcs) an energy accepting pentacene dimer (Pnc2 ). At focal point was modular SubPc approach, which based on decorating core with peripheral substituents to tailor fine-tune their optical properties. Transient measurements assisted corroborating that SubPcs act as...
We report here the synthesis of two novel subporphyrins (SubPs), in which macrocycle has been functionalized at its meso (1) or axial (2) position with tetracyanobuta-1,3-diene (TCBD)–aniline. In-depth spectroscopic, spectrometric, and electrochemical analyses were carried out both them, whose molecular structures determined by single-crystal X-ray diffraction studies. In case 2, Ra Sa enantiomers separable chiral HPLC presented a fairly good configurational stability room temperature,...
Due its complementary absorptions in the range of 450 and 600 nm, an energy-donating hexaaryl-subporphyrazine has been linked to a pentacene dimer, which acts primarily as energy acceptor secondarily singlet fission enabler. In corresponding conjugate, efficient intramolecular Förster resonance transfer (i-FRET) is modus operandi from subporphyrazine dimer. Upon transfer, dimer undergoes (i-SF), that is, converting excited state, via intermediate into pair correlated triplet states....
The recent development of organic polaritonic solar cells, in which sunlight absorbers and photon modes a resonator are hybridized as result their strong coupling, has revealed the potential this interaction offers to control enhance performance these devices. In approach, photovoltaic cell is built such way that it also behaves an optical cavity supporting spectrally well-defined resonances, match broad absorption bands dyes employed. Herein we focus on experimental theoretical analysis...
The synthesis of a series
Singlet fission (SF), which involves the conversion of a singlet excited state into two triplet excitons, holds great potential to boost efficiency photovoltaics. However, losses due triplet-triplet annihilation hamper efficient harvesting SF-generated limits an effective implementation in solar energy schemes. A fundamental understanding underlying structure-property relationships is thus crucial define design principles for cutting-edge SF materials, yet it remains elusive. Herein, we...
A porphyrazine featuring complementary absorption to a pentacene dimer was chosen fill the gap of latter in range 450 600 nm realize panchromatic through visible region out ca. 700 nm. Of even greater relevance is quantitative intramolecular Förster resonance energy transfer (i-FRET) funnel moieties, where efficient singlet fission (i-SF) converts excited state into corresponding triplet states. Remarkably, quantum yield either via direct excitation or indirect i-FRET up 200% ± 20% polar solvents.
In recent years, several tetracyanobuta-1,3-diene (TCBD) conjugates have been prepared by linking the tetracyano unit to various electroactive moieties. These push-pull conjugates, besides showing interesting physicochemical properties, are axially chiral, a feature arising from restricted rotation around central bond of butadiene. Yet, only in few cases, separation and isolation enantiomers successfully achieved, owing configurational lability corresponding enantiopure species. Herein, we...
Herein, both from the experimental and theoretical point of view, optical absorption properties a subphthalocyanine (SubPc), an organic macrocycle commonly used as sunlight harvester, coupled to metallic cavities are analyzed. How different electronic transitions characteristic this compound specifically those that give rise excitonic (Q band) charge transfer (CT couple cavity modes is investigated. It observed whereas CT band couples weakly cavity, Q show evidence hybridization with photon...
Abstract In the present work, energy donor 4,4‐difluoro‐4‐bora‐3a,4a‐diaza‐ s ‐indacene (BODIPY) is used for first time in combination with a pentacene dimer (Pnc 2 ) to provide conjugate BODIPYPnc that features absorption throughout large part of solar spectrum. Upon photoexcitation, singlet excited state BODIPY transferred via intramolecular Förster resonance transfer (FRET). Subsequently, undergoes fission. this process, correlated triplet pair generated from coupling an intermediate...
Several sulfonated cross-linked copolymers functionalized with hydroxyl and carboxylic groups have been synthesized. The amount of the cross-linking monomer was tailored (from 4% up to 40%) tune resulting micro- nano-morphologies, two types catalysts, namely, gel-type macroreticular were obtained. These employed in catalytic hydrolysis wheat straw pretreated 1-ethyl-3-methylimidazolium acetate obtain sugars. Remarkably, presence additional oxygenated enhances performances polymers by...
The synergy between panchromatic absorption and molecular singlet fission (SF) is exploited to optimize solar energy conversion.
Tunable emission from H-type supramolecular polymers prepared by self-assembly of tetraphenylethylene-based monomers is achieved harnessing the surface lattice resonances dielectric TiO 2 nanoparticles.
Abstract Owing to the electron‐donating and ‐accepting nature of corroles (Corr) phthalocyanines (Pc), respectively, we designed developed two novel covalently linked Corr‐Pc conjugates. The synthetic route allows preparation target conjugates in satisfying yields. Comprehensive steady‐state absorption, fluorescence, electrochemical assays enabled insights into energy electron‐transfer processes upon photoexcitation. Coordinating a pyridine‐appended subphthalocyanine (SubPc) Pc conjugate...
Peripherally metalated porphyrinoids are promising functional π-systems displaying characteristic optical, electronic, and catalytic properties. In this work, 5-(2-pyridyl)- 5,10,15-tri(2-pyridyl)-BIII -subporphyrins were prepared used to produce cyclometalated subporphyrins by reactions with [Cp*IrCl2 ]2 , which proceeded through an efficient C-H activation give the corresponding mono- tri-IrIII complexes, respectively. While mono-IrIII complex was obtained as a diastereomeric mixture, C3...
Four star-shaped electron acceptors (C
Abstract Die Synergie panchromatischer Lichtabsorption, die einen Großteil des sichtbaren Sonnenspektrums abdeckt, sowie intramolekularer Singulettspaltung (singlet fission, SF) wurde in einer Serie von Konjugaten realisiert, sich aus verschiedenen lichtsammelnden Subphthalocyaninen (SubPcs) und einem Pentacendimer (Pnc 2 ) als Energieakzeptor zusammensetzte. Im Fokus stand dabei ein Baukastenprinzip, das darauf basierte, den SubPc‐Kern dessen Peripherie mit unterschiedlichen Substituenten...
Abstract Peripherally metalated porphyrinoids are promising functional π‐systems displaying characteristic optical, electronic, and catalytic properties. In this work, 5‐(2‐pyridyl)‐ 5,10,15‐tri(2‐pyridyl)‐B III ‐subporphyrins were prepared used to produce cyclometalated subporphyrins by reactions with [Cp*IrCl 2 ] , which proceeded through an efficient C−H activation give the corresponding mono‐ tri‐Ir complexes, respectively. While mono‐Ir complex was obtained as a diastereomeric mixture,...
Abstract In recent years, several tetracyanobuta‐1,3‐diene (TCBD) conjugates have been prepared by linking the tetracyano unit to various electroactive moieties. These push–pull conjugates, besides showing interesting physicochemical properties, are axially chiral, a feature arising from restricted rotation around central bond of butadiene. Yet, only in few cases, separation and isolation enantiomers successfully achieved, owing configurational lability corresponding enantiopure species....