New dicyanovinyl-substituted 1-(alkyl)aryl-2-(2'-thienyl)pyrroles 2 were synthesized and characterized. The solvatochromic behavior of the compounds was investigated. All derivatives showed reversible oxidation reduction on CV time scale. hyperpolarizabilities (β) measured using hyper-Rayleigh scattering. results are among highest β values reported for donor−acceptor-substituted thienylpyrroles.

This work explores the self-assembly and optical properties of a novel chiral, aromatic-rich Boc-Phe-Phe dipeptide derivative functionalized with benzothiazole bicyclic ring, which forms supramolecular structures. Leveraging well-known self-assembling capabilities diphenylalanine dipeptides, this modified introduces heterocyclic unit that significantly enhances fluorescence resulting nanostructures. The derivative’s rich aromatic character drives formation structures through...

In recent decades, substantial progress has been made in embedding molecules, nanocrystals, and nanograins into nanofibers, resulting a new class of hybrid functional materials with exceptional physical properties. Among these materials, nanofibers exhibiting ferroelectric, piezoelectric, pyroelectric, multiferroic, nonlinear optical characteristics, have attracted considerable attention undergone improvements. This review critically examines developments, focusing on strategies for...

This work explores the self-assembly and optical properties of a novel chiral, aromatic-rich Boc-Phe-Phe dipeptide derivative functionalized with benzothiazole bicyclic ring that forms supramolecular structures. Leveraging well-known self-assembling capabilities diphenylalanine dipeptides, this modified introduces heterocyclic unit significantly enhances fluorescence resulting nanostructures. The derivative's rich aromatic character drives formation structures through self-organization...

(Boc=tert-butoxycarbonyl)-p-nitro-L-phenylalanyl-p-nitro-L-phenylalanine, a dipeptide characterised by acentric symmetry, self-assembles into microtapes. This study explores its thermal, structural, and nonlinear optical properties. Thermogravimetric analysis reveals an onset degradation temperature of 190 ºC,...

Electrospinning of an aqueous poly(vinyl alcohol) and glycine solution has been used to produce nanofibers with embedded crystalline exclusively in the form β polymorph. The β-glycine nanocrystals are highly oriented within polymer fibers present good polar properties. Piezoelectric nonlinear optical responses have quantitatively examined showing piezoelectric coefficient deff = 12.5 pm/V effective susceptibility two times greater than that potassium dihydrogen phosphate (KDP). Additionally,...

In-plane aligned nanofibers of organic 2-methyl-4-nitroaniline (MNA) were produced by the electrospinning technique using a 1:1 weight ratio with poly(l-lactic acid). The fibers are capable enormous efficient optical second harmonic generation as strong pure MNA crystals in powder form. Structural, spectroscopic, and polarimetry studies show that crystallizes within an orientation which aromatic rings predominantly orientated edge-on respect to plane fiber array their dipole moments axis....

Dipeptide biomaterials are strong piezoelectric materials that can convert applied mechanical forces into electricity. We have developed large-scale hybrid electrospun arrays containing N-tert-butoxycarbonyl (Boc) diphenylalanine in the form of nanotubes embedded biocompatible polymers. These nanofibers exhibit properties when a periodic force is applied. The nanostructured were produced by electrospinning technique. Optical absorption measurements show four bands spectral region 240-280 nm...

Nanostructured dipeptide self-assemblies exhibiting quantum confinement are of great interest due to their potential applications in the field materials science as optoelectronic for energy harvesting devices. Cyclic dipeptides an emerging outstanding group ring-shaped dipeptides, which, because multiple interactions, self-assemble supramolecular structures with different morphologies showing and photoluminescence. Chiral cyclic may also display piezoelectricity pyroelectricity properties...

Dual self-assembly of dipeptides into microspheres and microtapes. Quantum confinement in self-assembled structures dipeptides. Self-assembly as nanospheres nanotubes blue luminescent electrospun fibers.

We report excellent piezoelectric and pyroelectric properties of electrospun nanofibers based on the hybrid ferroelectric 1,4-diazabicyclo[2.2.2]octane perrhenate (dabcoHReO4). Ferroelectric nanoparticles are embedded into fibers being naturally aligned with major polarization component along fiber axis. A flexible nanogenerator consisting an array dabcoHReO4 provides a voltage above 100 mV under moderate strain level. The coefficient in as-electrospun mat is similar to that poled...

We report the synthesis, structural and ferroelectric characterization of continuous well-aligned nanofibres barium titanate produced by electrospinning technique. The fibres with average diameter 150–400 nm consist connected nanoparticles BaTiO3 stacked together to form shape a long filament. tetragonal phase in obtained was revealed x-ray diffraction Raman spectroscopy has been also confirmed second harmonic generation (SHG) piezoresponse force microscopy (PFM). temperature dependence SHG...

Using the electrospinning technique nanofibers consisting of organic nonlinear optical 3-nitroaniline (3NA, C

Nanostructured dipeptide self-assemblies exhibiting quantum confinement are of great interest due to their potential applications in the field materials science as optoelectronic for energy harvesting devices. Among those, aromatic cyclo-dipeptides containing amino acid tryptophan wide-band gap semiconductors displaying high mechanical rigidity, photoluminescence and piezoelectric properties be used power generation. In this work, we report fabrication hybrid systems based on chiral...

Currently, magnetocaloric refrigeration technologies are emerging as ecofriendly and more energy-efficient alternatives to conventional expansion–compression systems. However, major challenges remain. A particular concern is the mechanical properties of materials, namely, their fatigue under cycling difficulty in processing shaping. Nevertheless, past few years, using multistimuli thermodynamic cycles with multicaloric refrigerants has led higher heat-pumping efficiencies. To address...

Abstract Growth kinetics of zinc (tris) thiourea sulphate (ZTS) crystals investigated as a function supersaturation is reported in this communication. Crystal growth rates were normal to the (100), (010) and (001) faces under conditions employed for bulk crystal growth. The (100) found follow continuous model (R G = Cσ) with respect whereas was satisfy birth spread (B+S) Aσ 5/6 exp(‐B/σ)). observed studied face are agreement mechanism predicted from estimated α (Jackson) factor. (© 2004...

In this work, we introduce lead-free organic ferroelectric perovskite N-methyl-N'-diazabicyclo[2.2.2]octonium)-ammonium triiodide (MDABCO-NH4I3) nanocrystals embedded in three different polymer fibers fabricated by the electrospinning technique, as mechanical energy harvesters. Molecular ferroelectrics offer advantage of structural diversity and tunability, easy fabrication, flexibility. Organic-inorganic hybrid materials are new low-symmetry emerging that may be used harvesters because...

An effective control of the second harmonic generation (SHG) efficiency in electrospun nanofibers nonlinear optically active 2-methyl-4-nitroaniline and carrier polymer poly(l-lactic acid) (MNA-PLLA) is presented. The SHG MNA-PLLA fibers strongly depends on diameter can be increased up to an order magnitude by controlling electrospinning processing parameters. For optimal process conditions, with optical coefficient that two orders greater than counterpart bulk powder MNA may obtained. work...

Intense well polarized second harmonic light was generated by poly(methyl methacrylate) nanofibres with embedded para-nitroaniline nanocrystals. Subwavelength diameter fibres were electro-spun using a 1:2 weight ratio of chromophore to polymer. Analysis the indicates that molecules, which nominally crystalize in centrosymmetric space group, organized into noncentrosymmetric structures leading order susceptibility dominated single tensor element. Under best deposition conditions, nanofibrers...