Bartolome Soberats

Bartolome Soberats
University of the Balearic Islands | UIB · Department of Chemistry

PhD in Chemistry

About

58
Publications
6,482
Reads
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1,657
Citations
Citations since 2017
41 Research Items
1398 Citations
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2017201820192020202120222023050100150200250
2017201820192020202120222023050100150200250
2017201820192020202120222023050100150200250
Introduction
Bartolome (Tomeu) Soberats currently works at the Department of Chemistry of the University of the Balearic Islands. Dr. Soberats does research in supramolecular polymers and functional liquid crystals.
Additional affiliations
September 2017 - present
University of the Balearic Islands
Position
  • Professor
May 2016 - September 2017
University of Wuerzburg
Position
  • Group Leader
May 2015 - March 2016
University of Wuerzburg
Position
  • PostDoc Position

Publications

Publications (58)
Article
Full-text available
Crowding effects are crucial to maintaining functionality in biological systems, but little is known about their role in analogous artificial counterparts. Within the growing field of supramolecular polymer science, crowding effects have hitherto remained underappreciated. Herein, we show that crowding effects exhibit strong and distinct control ov...
Article
After more than three decades of extensive investigations in supramolecular polymers, strategies for self‐limiting growth still remain challenging. Herein, we exploit a new V‐shaped monomer design to achieve anti‐cooperatively formed oligomers with superior robustness and high luminescence. In toluene, the monomer‐oligomer equilibrium is shifted to...
Article
After more than three decades of extensive investigations in supramolecular polymers, strategies for self‐limiting growth still remain challenging. Herein, we exploit a new V‐shaped monomer design to achieve anti‐cooperatively formed oligomers with superior robustness and high luminescence. In toluene, the monomer‐oligomer equilibrium is shifted to...
Article
Thermoreversible polymorphe Übergänge in supramolekularen Polymeren werden in der Zuschrift (DOI: 10.1002/ange.202213345) von Juan Aragó, Bartolome Soberats et al. beschrieben. Dieses Verhalten wurde bei einer neuen Familie von Squaramiden beobachtet, die sich bei Raumtemperatur zu Partikeln anordnen und beim Abkühlen der Probe eine reversible morp...
Article
Thermoreversible polymorph transitions in supramolecular polymers are reported in the Communication (DOI: 10.1002/anie.202213345) by Juan Aragó, Bartolome Soberats et al. This behavior was observed in a new family of squaramides that self‐assemble into particles at room temperature and undergo a reversible morphological transformation into fibers b...
Article
Full-text available
Hydrogen‐bonded squaramide (SQ) supramolecular polymers exhibit uncommon thermoreversible polymorph transitions between particle‐ and fiber‐like nanostructures. SQs 1‐3 , with different steric bulk, self‐assemble in solution into particles ( AggI ) upon cooling to 298 K, and SQs 1 and 2 , with only one dendronic group, show a reversible transformat...
Article
Hydrogen‐bonded squaramide (SQ) supramolecular polymers exhibit uncommon thermoreversible polymorph transitions between particle‐ and fiber‐like nanostructures. SQs 1‐3 , with different steric bulk, self‐assemble in solution into particles ( AggI ) upon cooling to 298 K, and SQs 1 and 2 , with only one dendronic group, show a reversible transformat...
Article
Full-text available
Liquid crystals have been intensively studied as functional materials. Recently, integration of various disciplines has led to new directions in the design of functional liquid-crystalline materials in the fields of energy, water, photonics, actuation, sensing, and biotechnology. Here, recent advances in functional liquid crystals based on polymers...
Article
Full-text available
Liquid Crystals Liquid‐crystalline assemblies of a variety of molecules forming 1D, 2D, and 3D structures lead to new functions. Recent advances in functional liquid‐crystalline materials based on polymers, supramolecular complexes, gels, colloids, and inorganic‐based hybrids are highlighted by Takashi Kato and co‐workers in article number 2109063....
Article
Herein, we present a strategy to enable a maintained emissive behavior in the self‐assembled state by enforcing an anti‐cooperative self‐assembly involving weak intermolecular dye interactions. To achieve this goal, we designed a conformationally flexible monomer unit 1 with a central 1,3‐substituted (diphenyl)urea hydrogen bonding synthon that is...
Article
Full-text available
Herein, we present a strategy to enable a maintained emissive behavior in the self‐assembled state by enforcing an anti‐cooperative self‐assembly involving weak intermolecular dye interactions. To achieve this goal, we designed a conformationally flexible monomer unit 1 with a central 1,3‐substituted (diphenyl)urea hydrogen bonding synthon that is...
Article
Full-text available
Anti-cooperative supramolecular polymerization by attenuated growth exhibited by self-assembling units of two electron-donor benzo[1,2-b:4,5-b']dithiophene (BDT) derivatives (compounds 1a and 1b) and the electron-acceptor 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) (compound 2) is reported. Despite the apparent cooperative mechanism of 1 an...
Article
Full-text available
We report on a on the liquid‐crystalline (LC) and luminescent properties of a series of N ‐annulated perylenes ( 1 ‐ 4 ) alternating amide and ester groups in their molecular structure. We found that the LC properties of these compounds does not only depends on the number of hydrogen bonding (H‐bonding) units, but also on the relative position of t...
Article
CMOS-MEMS microresonators have become excellent candidates for developing portable chemical VOC sensing systems thanks to their extremely large mass sensitivity, extraordinary miniaturization capabilities, and on-chip integration with CMOS circuitry to operate as a self-sustained oscillator. This paper presents two 4-anchored MEMS plate resonators,...
Article
In the presence of Ag(I), the monoanion of a cyano-N-squaraine (I) generates an intense fluorescent turn-on response. Experimental evidence and DFT calculations reveal a sequence of deprotonationcoordination events in which the Ag(I) ions play a dual role as Lewis acid and coordinating metal. The observed effect is highly selective for Ag(I) compar...
Article
In article number 2006133, Juan Aragó, Antonio Costa, Bartolome Soberats, and co‐workers report that the macrocycle MSq self‐assembles into two different aggregates (A and B) depending of the Z,E conformation of the squaramide units. The different self‐assembly modes and the corresponding aggregates of MSq are represented in a tile‐matching puzzle...
Article
The rising interest on pathway complexity in supramolecular polymerization has prompted the finding of novel monomer designs able to stabilize kinetically trapped species and generate supramolecular polymorphs. In the present work, the exploitation of the Z/E (geometrical) isomerism of squaramide (SQ) units to produce various self‐assembled isoform...
Article
Squaramides are versatile compounds with a great capacity to interact via non-covalent interactions and therefore of interest for the development of supramolecular systems and functional materials. In the present work, a new series of aryl-squaramides amphiphiles (1-5) were prepared to form supramolecular polymers in water. Interestingly, only comp...
Article
We report on the bio-inspired growth of gold nanoparticles (GNPs) in biocompatible hydrogels to develop plasmonic hybrid materials. The new hydrogel (CS-Sq) is prepared from chitosan and diethylsquarate and is formed via non-covalent interactions rising between the in-situ formed ionic squaric acid derivatives and chitosan. Interestingly, when the...
Article
Full-text available
The functionalization of interfaces has become very important for the protection or modification of metal (metal oxides) surfaces. The functionalization of aluminum is particularly interesting because of its relevance in fabricating components for electronic devices. In this work, the utilization of squaramic acids for the functionalization of alum...
Article
Full-text available
Self-assembly of amphiphilic dyes and π-systems are more difficult to understand and to control in water compared to organic solvents due to the hydrophobic effect. Herein, we elucidate in detail the self-assembly of a series of archetype bolaamphiphiles bearing a naphthalene bisimide (NBI) π-core with appended oligoethylene glycol (OEG) dendrons o...
Article
Full-text available
Switching one-dimensional ion conductivities in organic materials is a challenging task. Recently we found that a liquid-crystalline (LC) N,N,N-trimethyl-3,4,5-tridodecyloxy-anilinium salt showed a remarkable change in the conductivities of about four orders of magnitude, which is triggered by a thermotropic LC phase transition between rectangular...
Article
Electrospinning is a well-established technique for the preparation of nanofibres from polymer solution or melt, however it is rarely applied for small molecules. Here we report a unique example of a liquid-crystalline (LC) diketopyrrolopyrrole (DPP) dye that was successfully used for electrospinning. Micrometric fibres with anisotropic alignment o...
Article
Full-text available
A new twelvefold methoxy-triethyleneglycol-jacketed tetraphenoxy-perylene bisimide (MEG-PBI) amphiphile was synthesized that self-assembles into two types of supramolecular aggregates in water: red-coloured aggregates of low order and with weak exciton coupling among the PBIs and blue-coloured strongly coupled J-aggregates consisting of a highly or...
Article
Full-text available
Many discoid dyes self-assemble into columnar liquid-crystalline (LC) phases with packing arrangements that are undesired for photonic applications due to H-type exciton coupling. Here, we report a series of crystalline and LC perylene bisimides (PBIs) self-assembling into single or multi-stranded (two, three, and four strands) aggregates with pred...
Article
Full-text available
Supply of safe fresh water is currently one of the most important global issues. Membranes technologies are essential to treat water efficiently with low costs and energy consumption. Here, the development of self-organized nanostructured water treatment membranes based on ionic liquid crystals composed of ammonium, imidazolium, and pyridinium moie...
Article
The design and functions of liquid-crystalline (LC) polymers with classifying them into conventional-, supramolecular-, dendritic- and network-type LC polymers are described. LC polymers show new functions as new devices in the field of energy and environment by incorporating mesogenic moieties exhibiting photonic, electronic and ionic functions. S...
Article
We report on a new diketopyrrolopyrrole (DPP) dye that self-assembles via a unique hydrogen bonding motif into an unprecedented columnar liquid-crystalline (LC) structure. X-ray and polarized FT-IR experiments reveal that the DPPs organize into a one-dimensional assembly with the chromophores oriented parallel to the columnar axis. This columnar st...
Article
We report on a new diketopyrrolopyrrole (DPP) dye that self-assembles via a unique hydrogen bonding motif into an unprecedented columnar liquid-crystalline (LC) structure. X-ray and polarized FT-IR experiments reveal that the DPPs organize into a one-dimensional assembly with the chromophores oriented parallel to the columnar axis. This columnar st...
Article
The cover picture shows dye-coated TiO2 particles and a nanostructured liquid crystal that forms two-dimensional ion transport pathways, with ions (red spheres) localized in between non-polar layers (blue). Dye-sensitized solar cells employing these liquid-crystalline ion conductors as electrolytes show more efficient energy conversion when based o...
Article
We report on dye-sensitized solar cells employing non-volatile liquid-crystalline (LC) electrolytes that form nanostructures capable of efficient ion transport. The LC electrolyte consists of a cyclic carbonate-functionalized mesogen and an iodide-based ionic liquid that nanosegregates into lamellar structures exhibiting over 4 times higher ion con...
Article
The nanosegregated structures of columnar, smectic and bicontinuous cubic liquid crystals can provide well-organized, nano- and sub-nanosized 1D, 2D and 3D channels capable of ion and electron transport. The molecular shape, intermolecular interactions and nanosegregation of the molecular structures can influence their self-assembly into a range of...
Article
A new perylene bisimide (PBI) dye self-assembles through hydrogen bonds and π–π interactions into J-aggregates that in turn self-organize into liquid-crystalline (LC) columnar hexagonal domains. The PBI cores are organized with the transition dipole moments parallel to the columnar axis, which is an unprecedented structural organization in π-conjug...
Article
A new perylene bisimide (PBI) dye self-assembles through hydrogen bonds and π-π interactions into J-aggregates that in turn self-organize into liquid-crystalline (LC) columnar hexagonal domains. The PBI cores are organized with the transition dipole moments parallel to the columnar axis, which is an unprecedented structural organization in π-conjug...
Article
Full-text available
The self-assembly of perylene bisimide (PBI) dyes bearing oligo ethylene glycol (OEG) units in water affords responsive functional nanostructures characterized by their lower critical solution temperature (LCST). Tuning of the LCST is realized by a supramolecular approach that relies on two structurally closely related PBI-OEG molecules. The two PB...
Article
Nanostructured liquid-crystalline (LC) electrolytes have been developed for efficient and stable quasi-solid-state dye-sensitized solar cells (DSSCs). Two types of ionic LC assemblies for electrolytes have been designed: (i) noncovalent assemblies of two-component mixtures consisting of I2-doped imidazolium ionic liquids and carbonate-terminated me...
Article
A novel squaraine dye constitutes an unusual nematic mesogen absorbing in the near infrared region. Aligned thin films of the squaraine material are produced by mechanical shearing of the liquid-crystalline phase and feature remarkable anisotropic absorption of linearly polarized light in the spectral region between 600 and 1000 nm.
Article
Full-text available
We herein report that molecular assembly of wedge-shaped mesomorphic diols and a protic salt results in the formation of anhydrous one-dimensional (1D) and 2D proton-conductive materials. The protic salt has been obtained by stoichiometric neutralization of imidazole with benzenesulfonic acid. The protic salt is incorporated into the hydrogen-bonde...
Article
We demonstrate switching of ionic conductivities in wedge-shaped liquid-crystalline (LC) ammonium salts. A thermoreversible phase transition between the rectangular columnar (Colr) and hexagonal columnar (Colh) phases is used for the switch. The ionic conductivities in the Colh phase are about four orders of magnitude higher than those in the Colr...
Article
Full-text available
We describe the development of self-assembled one- and three-dimensional lithium ion conductors composed of zwitterionic liquid crystals, lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) and propylene carbonate (PC). Two types of wedge-shaped zwitterions based on imidazolium dicyanoethenolate and sulfonate were synthesized. These compounds alone...
Patent
Full-text available
A liquid crystalline compound and an electrolyte material in which the conductivity switches between ion conductivity and non-ion conductivity depending on changes in temperature, and thus a switching function can be obtained are proposed. The liquid crystalline compound has a columnar liquid crystal phase in which an ammonium group is linked with...
Article
Nanostructured liquid-crystalline (LC) ion transporters have been developed and applied as new electrolytes for dye-sensitized solar cells (DSSCs). The new electrolytes are two-component liquid crystals consisting of a carbonate-based mesogen and an ionic liquid that self-assemble into two-dimensional (2D) nanosegregated structures forming well-def...
Article
The photocontrol of macroscopic alignment of nanostructured 2D ion-transporting pathways is described. The uniplanar homogenous alignment of thermotropic smectic (Sm) liquid-crystalline (LC) phase has been successfully achieved via photoinduced reorientation of the azobenzene groups of the imidazolium-based LC material. The ionic layers of the Sm L...
Article
The hydrolysis of a choline carbonate through a metal-free, enzyme-like mechanism has been achieved using a 2-aminobenzimidazole-based deep cavitand as catalyst. The supramolecular catalysis involves three steps: host-guest binding, carbamoylation and enzyme-like hydrolysis. Interestingly the rate-determining step proceeds through a programmed hydr...
Article
Herein we describe anhydrous proton transportation through 3D interconnected pathways formed by self-assembled molecular complexes. A thermotropic bicontinuous cubic (Cubbi) phase has been successfully obtained by mixing a wedge-shaped sulfobetaine with benzenesulfonic acid in different ratios. These ionic complexes exhibit the Cubbi phase in a wid...
Article
New tripodal squaramide-based hosts have been synthesised and structurally characterised by spectroscopic methods. In 2.5 % (v/v) [D(6)]DMSO in CDCl(3), compound 4 formed dimeric assemblies [log K(dim)=3.68(8)] as demonstrated by (1)H NMR spectroscopy and UV dilution experiments. AFM and SEM analyses revealed the formation of a network of bundled f...
Article
Alkynylation of aryl iodides with propargylic amines has been achieved by means of a Sonogashira coupling using “on water” methods. The use of less than 0.2 mol% of tetrakis(triphenylphosphine)palladium [Pd(PPh3)4] and 1.5 mol% copper(I) iodide [CuI] in the presence of diisopropylethylamine (DIPEA) allows the coupling to proceed at 95 °C yielding m...
Article
Two sensing ensembles based on the common squaramide host 2 and the acid-base indicators Cresol Red (CR) and Bromocresol Green (BG) are described. Both couples were characterized in EtOH-H2O mixtures by UV-Vis spectroscopy. Analysis of the binding curves and the corresponding Job plots indicate 1 : 1 binding between the indicators CR or BG and host...
Article
Synthetic anionic receptors are fundamental to the understanding of the mechanism of recognition phenomena, which is the basis of many fundamental biological processes. Recognition studies and X-ray crystallography techniques provide accurate information on the structure of the molecular complexes and the nature of the interactions involved. Here,...
Article
The combination of squaramide units with tetraalkylammonium groups leads two hosts that bind distinctively dianions in water-ethanol mixtures. The formation of complexes of 2:1 stoichiometry with host was supported by ITC, fluorescence, and (1)H NMR data.

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