A5053649007- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Polyoxometalates: Synthesis and Applications
- Metal-Organic Frameworks: Synthesis and Applications
- biodegradable polymer synthesis and properties
- Vanadium and Halogenation Chemistry
- Carbon dioxide utilization in catalysis
- Advanced Polymer Synthesis and Characterization
- Polymer crystallization and properties
- Surfactants and Colloidal Systems
- Polymer Nanocomposites and Properties
- Liquid Crystal Research Advancements
- Advanced Nanomaterials in Catalysis
- Concrete and Cement Materials Research
- Photodynamic Therapy Research Studies
- Silicone and Siloxane Chemistry
- Crystallography and molecular interactions
- Nanocluster Synthesis and Applications
- Dielectric materials and actuators
- Advanced Sensor and Energy Harvesting Materials
- Conducting polymers and applications
- Click Chemistry and Applications
- Pickering emulsions and particle stabilization
- Advanced Photocatalysis Techniques
- Layered Double Hydroxides Synthesis and Applications
Donostia International Physics Center
2016-2024
Material Physics Center
2016-2024
Ayuntamiento de San Sebastián
2020
University of the Basque Country
2007-2019
Ring closure click chemistry methods have been used to produce cyclic c-PLLA and c-PDLA of a number-average molecular weight close 10 kg/mol. The effects stereochemistry the polymer chains their topology on structure, nucleation, crystallization were studied in detail employing wide-angle X-ray scattering (WAXS), small-angle (SAXS), polarized light optical microscopy (PLOM), standard advanced differential scanning calorimetry (DSC). crystal structures linear PLAs are identical each other, no...
Abstract Organic solar cells incorporating non‐fullerene acceptors (NFAs) have reached remarkable power conversion efficiencies of over 18%. Unlike fullerene derivatives, NFAs tend to crystallize from solutions, resulting in bulk heterojunctions that include a crystalline acceptor phase. This must be considered any morphology‐function models. Here, it is confirmed high‐performing solution‐processed indacenodithienothiophene‐based NFAs, i.e., ITIC and its derivatives ITIC‐M, ITIC‐2F, ITIC‐Th,...
Reaction of in situ generated copper(II)-monosubstituted Keggin polyoxometalates and copper(II)-phenanthroline-oxalato complexes ammonium or rubidium acetate buffers led to the formation hybrid inorganic-metalorganic compounds E4[Cu(phen)(H2O)4]2[Cu4(phen)4(H2O)4(ox)3]0.6[Cu2(phen)2(H2O)4(ox)]0.4[Cu(phen)(ox)]0.8[{SiW11O39Cu(H2O)}2{Cu2(phen)2(ox)}].20H2O [E: Rb (1), NH4 (2)]. The two have been characterized by means elemental analysis, thermogravimetry, infrared electron paramagnetic...
The urban heat island effect has become a critical issue in areas, intensifying heat-related problems and increasing energy consumption. A sustainable cement formulation that combines ordinary Portland (OPC) with carbonated aggregate derived from Periwinkle shell powder for the development of an efficient cool material is presented. Through carbonation process, undergoes transformation, capturing carbon dioxide (CO2) converting it into calcite. resulting mixture exhibits high solar...
Two new hybrid compounds constructed from Keggin type polyoxometalates and copper(II) complexes of tetradentate ligands containing amine pyridyl groups, namely [Cu(bpmen)(H2O)][SiW12O40{Cu(bpmen)}] (1) [SiW12O40{Cu(bpmpn)(H2O)}2]·3H2O (2) (bpmen, N,N′-dimethyl-N,N′-bis-(pyridin-2-ylmethyl)-1,2-diaminoethane; bpmpn, N,N′-dimethyl-N,N′-bis(pyridin-2-ylmethyl)-1,3-diaminopropane), have been synthesized under hydrothermal conditions characterized by elemental analyses infrared Raman...
ABSTRACT The structure and thermal properties of linear low‐density polyethylene (LLDPE)/medium soft paraffin wax blends, prepared by melt mixing, were investigated differential scanning calorimetry (DSC) small‐ wide‐angle X‐ray scattering (SAXS WAXS). blends form a single phase in the as determined SAXS. Upon cooling from melt, two crystalline phases develop for with more than 10 wt % characterized widely different melting points. acts an effective plasticizer LLDPE, decreasing both its...
Poly(butylene succinate-ran-butylene azelate) random copolyesters were thermally fractionated by successive self-nucleation and annealing (SSA). The samples before after SSA analyzed differential scanning calorimetry (DSC) X-ray diffraction (WAXS SAXS). WAXS results indicate that a small degree of comonomer inclusion is present in the crystalline phases are formed copolymers depending on composition: PBS-like unit cell or/and PBAz-like cell, thus confirming isodimorphic behavior samples....
The synthesis of symmetric cyclo poly(ε-caprolactone)-block-poly(l(d)-lactide) (c(PCL-b-PL(D)LA)) by combining ring-opening polymerization ε-caprolactone and lactides subsequent click chemistry reaction the linear precursors containing antagonist functionalities is presented. two blocks can sequentially crystallize self-assemble into double crystalline spherulitic superstructures. cyclic chain topology significantly affects both nucleation crystallization each constituent, as gathered from a...
Herein, we elucidate the impact of tubular confinement on structure and relaxation behavior poly(vinylidene difluoride) (PVDF) how these affect para-/ferroelectric this polymer. We use PVDF nanotubes that were solidified in anodic aluminum oxide (AAO) templates. Dielectric spectroscopy measurements evidence a bimodal process for nanotubes: besides bulk-like α-relaxation, detect notably slower is associated with regions restricted dynamics at interface AAO pore. Strikingly, both interfacial...
A magnetorheological fluid with good properties (yield stress and reversibility), containing high magnetization FeCo nanoparticles as magnetic fillers is presented.
Hydrothermal reaction of the Keggin-type [α-GeW11O39]8– anion with copper(II) complexes tetradentate N-donor ligands N,N′-dimethyl-N,N′-bis-(pyridine-2-ylmethyl)-1,2-diaminoethane (bpmen) or N,N′-dimethyl-N,N′-bis-(pyridine-2-ylmethyl)-1,3-diaminopropane (bpmpn) results in three new hybrid compounds [Cu(bpmen)(H2O)][GeW12O40{Cu(bpmen)}]·3.5H2O (1), [GeW12O40{Cu(bpmpn)(H2O)}2]·3H2O (2), and [Cu(bpmpn)(H2O)][GeW12O40{Cu(bpmpn)}]·8H2O (3). All have been characterized by elemental analyses...
The sequential crystallization of poly(ethylene oxide)-<italic>b</italic>-poly(ε-caprolactone)-<italic>b</italic>-poly(<sc>l</sc>-lactide) (PEO-<italic>b</italic>-PCL-<italic>b</italic>-PLLA) triblock terpolymers, in which the three blocks are able to crystallize separately and sequentially from melt, is presented.
High molar mass SCLCPs were synthesized by miniemulsion polymerization, and the phase behavior of polymers was investigated a combination DSC, PLM, SAXS WAXS.
Employing the hydroxyl groups on surface of Cloisite® 30B montmorillonite (Cl30B), ring-opening polymerization L-lactide was performed with a metal-free catalyst to yield PLLA-g-Cl30B nanohybrid low Mn grafted PLLA chains (i.e., 9 kg mol−1). This then melt mixed PLA 4032D from NatureWorks, which is slow-crystallizing as it contains 2% D-isomers and has high value 123 The samples were characterized by TEM, WAXS, SAXS, DSC Polarized Light Optical Microscopy (PLOM) in order study their...
Cyclic polymers behave different than linear due to the lack of end groups and smaller coil dimensions. Herein, we demonstrate that cyclic polyethylene glycol (PEG) can be used as an alternative classical PEG ligands for gold nanoparticle (AuNP) stabilization. We observed brush height on AuNPs diameter 4.4 13.2 nm increases identically brushes with (Nσ1/2)0.7 (N, number monomers in a chain σ, grafting density) are more stretched their analogues when compared unperturbed Such structural...
We have investigated how variations in primary structure (distribution of monomeric units, chain length) and degree branching affect the crystallization behavior polysulfides. In particular, we used copolymers crystallizable (ethylene sulfide, ES) non-crystallizable (propylene PS) prepared via anionic ring-opening mechanism. PS units interrupt ES sequences; therefore, strong differences thermal properties are expected between with a gradient (single addition ES/PS mixtures) or semirandom...
This work introduces rationally designed, improved amphiphilic single-chain polymer nanoparticles (SCNPs) for imaging and photodynamic therapy (PDT) in zebrafish embryo xenografts. SCNPs are ultrasmall polymeric with sizes similar to proteins, making them ideal biomedical applications. Amphiphilic result from the self-assembly water of isolated synthetic chains through intrachain hydrophobic interactions, mimicking natural biomacromolecules and, specially, proteins (in size when loaded...
Geopolymers, a class of sustainable inorganic materials derived from natural and recycled resources, hold promise for various applications, including thermoelectric power generation. This study delves into the properties Ikere white (IKW)-geopolymer, kaolin clay, by employing rigorous measurements thermal conductivity, electrical Seebeck coefficient. The investigation elucidates pivotal role temperature ions in shaping performance IKW-geopolymer. Electrical conductivity analysis pinpoints...
The main challenge for the preparation of protein single-chain nanoparticles (SCNPs) is natural complexity these macromolecules. Herein, we report suitable conditions to produce "neat" bovine serum albumin (BSA) from partially denatured BSA, which involves denaturation in urea and intramolecular cross-linking below overlap concentration. We use two disuccinimide ester linkers containing three six methylene spacer groups: disuccinimidyl glutarate (DSG) suberate (DSS), respectively....
The 3D hybrid framework [{Cu(cyclam)}3 (κ-Mo8 O27 )] ⋅ 14H2 O (1) (cyclam=1,4,8,11-tetraazacyclotetradecane) undergoes sequential single-crystal-to-single-crystal transformations upon heating to afford two different anhydrous phases (2 a and 3 a). These transitions modify the dimensionality enable isomerization of κ-octamolybdate ) anions into λ a) μ (3 forms through metal migration. Hydration involves condensation one water molecule cluster γ-Mo8 isomer in 4, which dehydrates back 6...
A new hybrid inorganic-organometallic salt has been obtained from the reaction of Keggin-type silicotungstate anion with ferrocene in a water/methanol mixture as result partial oxidation molecules to ferrocenium cations. Single-crystal X-ray diffraction analysis reveals presence four (FeIII) cations and one (FeII) molecule per plenary Keggin crystal structure [FeIII (Cp)₂]₄[SiW12O40]·[FeII(Cp)₂]·2CH₃OH (1). Compound 1 thus constitutes first example literature which species coexist...
Three new hybrid inorganic-metalorganic compounds containing Keggin-type polyoxometalates, neutral copper(II)-picolinate complexes and guanidinium cations have been synthesized in bench conditions characterized by elemental analysis, infrared spectroscopy single-crystal X-ray diffraction: the isostructural [C(NH2)3]4[{XW12O40}{Cu2(pic)4}]·[Cu2(pic)4(H2O)]2·6H2O [X = Si (1), Ge (3)] [C(NH2)3]8[{SiW12O40}2{Cu(pic)2}3{Cu2(pic)4(H2O)}2]·8H2O (2). The three show a pronounced two-dimensional...