A5058150888- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Advanced Sensor and Energy Harvesting Materials
- Conducting polymers and applications
- Perovskite Materials and Applications
- Supramolecular Self-Assembly in Materials
- Chemical Synthesis and Analysis
- Molecular Sensors and Ion Detection
- Polydiacetylene-based materials and applications
- Photochromic and Fluorescence Chemistry
- Metal-Organic Frameworks: Synthesis and Applications
- Antimicrobial Peptides and Activities
- Supramolecular Chemistry and Complexes
- Ferroelectric and Piezoelectric Materials
- Acoustic Wave Resonator Technologies
- Innovative Energy Harvesting Technologies
- Coordination Chemistry and Organometallics
- Catalytic Cross-Coupling Reactions
- Luminescence and Fluorescent Materials
- Organoboron and organosilicon chemistry
- Organometallic Compounds Synthesis and Characterization
- Synthesis and characterization of novel inorganic/organometallic compounds
- Dielectric materials and actuators
- Solid-state spectroscopy and crystallography
- Crystal Structures and Properties
Tel Aviv University
2021-2024
Indian Institute of Science Education and Research Pune
2016-2022
Indian Institute of Science Education and Research Berhampur
2017-2018
Indian Institute of Science Education and Research Mohali
2017-2018
Indian Institute of Science Education and Research Kolkata
2017-2018
Savitribai Phule Pune University
2017-2018
Indian Institute of Science Education and Research, Bhopal
2017-2018
Indian Institute of Science Education and Research, Tirupati
2017-2018
Abstract This article provides a comprehensive overview of piezo‐ and ferro‐electric materials based on organic molecules organic–inorganic hybrids for mechanical energy harvesting. Molecular (organic hybrid) ferroelectric exhibit significant advantages over traditional due to their simple solution‐phase synthesis, light‐weight nature, thermal stability, flexibility, high Curie temperature, attractive properties. However, the design understanding ferroelectricity in hybrid piezoelectric...
Organic-inorganic hybrid ferroelectrics are an exciting class of molecular materials with promising applications in the area energy and electronics. The synthesis, ferroelectric piezoelectric harvesting behavior a 3d metal ion-containing A4 BX6 type organic-inorganic salt [Ph3 MeP]4 [Ni(NCS)6 ] (1) is now presented. P-E hysteresis loop studies on 1 show remnant polarization value 18.71 μC cm-2 , at room temperature. Composite thermoplastic polyurethane (TPU) devices 5, 10, 15 20 wt %...
Molecular ferroelectrics owing to their lightweight, flexibility, and phase stability are drawing attention in the fields of flexible electronics, optical devices, energy materials. In this paper, we report a series binary organoamino phosphonium salts containing triphenyl isopropylaminophosphonium (TPAP), diphenyl diisopropylaminophosphonium (DPDP), phenyl triisopropylaminophosphonium (PTAP), tetraisopropylaminophosphonium (TIAP) cations supported by lower symmetric tetrahedral BF4–, ClO4–,...
Artificial biomimetic chloride anionophores have shown promising applications as anticancer scaffolds. Importantly, stimuli-responsive transporters that can be selectively activated inside the cancer cells to avoid undesired toxicity normal, healthy are very rare. Particularly, light-responsive systems promise better applicability for photodynamic therapy because of their spatiotemporal controllability, low toxicity, and high tunability. Here, in this work, we report o-nitrobenzyl-linked,...
Fmoc–Lys(Fmoc)–Phe produced self-healing hydrogels with dye adsorption capability. The Phe groups facilitate the branching of fibers. Composite peptide edge-functionalized graphene oxide exhibited semiconductive behavior.
Synthetic chloride carriers are known to induce chloride-mediated apoptosis inside cancer cells. One of the main disadvantages is unfavorable cytotoxicity towards healthy cells due lack selectivity....
A new binary organic salt diphenyl diisopropylamino phosphonium hexaflurophosphate (DPDP⋅PF6 ) was shown to exhibit a good ferroelectric response and employed for mechanical energy harvesting application. The crystallizes in the monoclinic noncentrosymmetric space group Cc exhibits an H-bonded 1D chain structure due N-H⋅⋅⋅F interactions. Ferroelectric measurements on single crystals of DPDP⋅PF6 gave well-saturated rectangular hysteresis loop with remnant (Pr polarization value 6 μC cm-2 ....
We report here enhanced vibration and pressure sensing properties of nanocellulose reinforced flexible composite piezoelectric nanogenerators (PENGs). Surface fluorinated crystals (FNC) were incorporated into poly(vinylidene fluoride) (PVDF) electrospun nanofibers. Incorporation only 2 wt % FNC in PVDF resulted a significant enhancement sensitivity with very low detectable limit 10 Pa up to 18 mV/kPa. The PENGs also demonstrated high for forced continuous vibrations. 2FNC/PVDF composites an...
Photoswitchable acylhydrazone-based synthetic anionophores are reported. Single-crystal X-ray structure and 1H NMR titration studies confirmed the chloride binding in solid solution states. The ion transport activity of 1a was greatly attenuated through a phototriggered E to Z photoisomerization process, photoisomerized deactivated state showed high kinetic stability due an intramolecular hydrogen bond. Switchable "OFF–ON" achieved by application light acid-catalyzed reactivation process.
Hybrid materials possessing piezo- and ferroelectric properties emerge as excellent alternatives to conventional piezoceramics due their merits of facile synthesis, lightweight nature, ease fabrication mechanical flexibility. Inspired by the structural stability aminophosphonium compounds, here we report first A3 BX6 type cyanometallate [Ph2 (i PrNH)2 P]3 [Fe(CN)6 ] (1), which shows a saturation polarization (Ps ) 3.71 μC cm-2 . Compound 1 exhibits high electrostrictive coefficient (Q33 0.73...
Perovskite-structured compounds containing organic cations and inorganic anions have gained prominence as materials for next-generation electronic energy devices. Hybrid possessing ferro- piezoelectric properties are in recent focus mechanical harvesting (nanogenerator) applications. Here, we report the ferroelectric behavior of A2BX4-type halogenocuprate supported by heteroleptic phosphonium cations. These lead-free discrete Cu(II) halides [Ph3MeP]2[CuCl4] (1) [Ph3MeP]2[CuBr4] (2) exhibit a...
Abstract Phenylhydrazone‐based synthetic receptors are reported as stimuli‐responsive anion transporters. The X‐ray crystallographic studies confirmed the preorganized binding E ‐state and closed non‐binding Z ‐state. detailed ion transport mechanistic Cl − /anion exchange primary process. Their light‐stimulated ‐to‐ isomerization led to a substantial decrease in activity across lipid bilayer membrane. Reversible “OFF” “ON” switching was studied by light acid stimuli, respectively.
The emergence of a broad-spectrum antibacterial hydrogel by the co-assembly minimalistic amino acid-based building blocks affords novel class biomaterials.
Supramolecular helical structures formed by the assembly of biological and bio-inspired building blocks (typically amino acids peptides) are an exciting class materials with prospective applications in biomedical technologies electronics.
Abstract Organic–inorganic hybrid ferroelectrics are an exciting class of molecular materials with promising applications in the area energy and electronics. The synthesis, ferroelectric piezoelectric harvesting behavior a 3d metal ion‐containing A 4 BX 6 type organic–inorganic salt [Ph 3 MeP] [Ni(NCS) ] ( 1 ) is now presented. P‐E hysteresis loop studies on show remnant polarization value 18.71 μC cm −2 , at room temperature. Composite thermoplastic polyurethane (TPU) devices 5, 10, 15 20...
The isolation of carbon-centered diradicals is always challenging due to synthetic difficulties and their limited stability. Herein we report the synthesis a trans-1,4-cyclohexylene bridged bis-NHC-CAAC dimer derived thermally stable dicationic diradical. diradical character this compound was confirmed by EPR spectroscopy. variable temperature study suggests singlet state be marginally more than triplet (2J = -5.5 cm-1 (ΔE ST 0.065 kJ mol-1)). presence bridge instrumental for successful...
Abstract Sulfonic acid‐containing bioorganic monomers with wide molecular designability and abundant hydrogen bonding sites hold great potential to design diverse functional biocrystals but have so far not been explored for piezoelectric energy harvesting applications due the lack of strategies break centrosymmetry their assemblies. Here, a significant packing transformation from centrosymmetric into non‐centrosymmetric conformation by addition an amide terminus in sulfonic molecule is...
Synthesis of new cyclotetrasiloxane scaffolds containing peripherally functionalized 3-pyridyl moieties, [MeSiO(CH═CH(3)Py)]4 (L(1)) and [MeSiO(CH2CH2(3)Py)]4 (L(2)), their reactivity studies with certain d(10) metal ions are reported. The ligand L(1) is obtained by the Heck-coupling reaction tetramethyl tetravinyl tetrasiloxane (D4(vi)) 3-bromopyridine in presence Pd(0) catalysts. as-synthesized shows three stereoisomers, cis-trans-cis (L(1A)), cis-cis-trans (L(1B)), all-trans (L(1C)),...
Abstract A new binary organic salt diphenyl diisopropylamino phosphonium hexaflurophosphate (DPDP⋅PF 6 ) was shown to exhibit a good ferroelectric response and employed for mechanical energy harvesting application. The crystallizes in the monoclinic noncentrosymmetric space group Cc exhibits an H‐bonded 1D chain structure due N−H⋅⋅⋅F interactions. Ferroelectric measurements on single crystals of DPDP⋅PF gave well‐saturated rectangular hysteresis loop with remnant ( P r polarization value μC...
Molecular ferroelectric materials are an exciting class of for potential applications in energy and electronics. Herein, we report examples hydrogen-bonded binary salts diphenyl diisopropylamino phosphonium halides [Ph2(iPrNH)2P]·X [DPDP·X, X = Cl, Br, I] which show dielectric, piezoelectric NLO properties some potentially attributes at room temperature. The bromide salt was prepared by bromination the phosphine precursor Ph2PCl its subsequent treatment with isopropyl amine. chloride iodide...
Metal-mediated supramolecular assembly of a minimal β-sheet peptide revealed hetero terminal assembled into 3D porous honeycomb framework.