A5031132995- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Analytical Chemistry and Sensors
- Molecular Junctions and Nanostructures
- Perovskite Materials and Applications
- Advancements in Battery Materials
- Transition Metal Oxide Nanomaterials
- Advanced Battery Materials and Technologies
- Luminescence and Fluorescent Materials
- Organic Light-Emitting Diodes Research
- Porphyrin and Phthalocyanine Chemistry
- Graphene research and applications
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Advanced Battery Technologies Research
- Supercapacitor Materials and Fabrication
- Synthesis and Properties of Aromatic Compounds
- Fullerene Chemistry and Applications
- Electrochemical Analysis and Applications
- Supramolecular Self-Assembly in Materials
- Advanced Chemical Sensor Technologies
- Electrochemical sensors and biosensors
- Advanced Sensor and Energy Harvesting Materials
- Polydiacetylene-based materials and applications
- Fuel Cells and Related Materials
Institute of Organic Synthesis and Photoreactivity
2016-2025
National Research Council
2022-2024
Legambiente
2017
Consorzio Roma Ricerche
2014
Italian Institute of Technology
2012
University of Bologna
1994-2008
Bologna Research Area
2003
University of Palermo
2000
Universidade Estadual de Campinas (UNICAMP)
1996
Abstract The different exfoliation routes of graphite to produce graphene by sonication in solvent, chemical oxidation and electrochemical are compared. process roughening a flat substrate is directly visualized at the nanoscale scanning probe electron microscopy. etching damage properties exfoliated sheets compared Raman spectroscopy X‐ray diffraction analysis. results show trade‐off between speed preservation quality. A key step achieve efficient couple gas production mechanical on...
A graphite ‘flower’ is produced by V. Palermo and co-workers in order to study the production exfoliation mechanism of soluble graphene oxide nanosheets due chemical etching, electrochemical treatment, or sonication organic solvents bulk graphite. In background back cover image, same material visualized electron microscopy. The process roughening flat substrate upon directly at nanoscale on page 4684.
Several types of lithium ion conducting polymer electrolytes have been synthesized by hot‐pressing homogeneous mixtures the components, namely, poly(ethylene oxide) (PEO) as matrix, trifluoromethane sulfonate , and tetrafluoborate respectively, salt, gamma‐aluminate a ceramic filler. This preparation procedure avoids any step including liquids so that plasticizer‐free, composite can be obtained. These electrolyte enhanced electrochemical properties, such an ionic conductivity order at...
New low-gap thiophene-based regular copolymers are produced by anodic coupling of 3,4-ethylenedioxythiophene-2,5-substituted thieno[3,4-b]pyrazine (TP), cyclopenta[2,1-b;3,4-b']dithiophen-4-one (CO), and 4-dicyanomethylene-4H-cyclopenta[2,1-b;3,4-b']dithiophene (CN). The characterized cyclic voltammetry, FTIR reflection−absorption UV−vis spectroscopy, electrochemical quartz crystal microbalance analysis, in situ p- n-conductivity measurement. show low optical gaps (measured at the maximum...
Functional supramolecular architectures for bottom-up organic nano- and microtechnology are a high priority research topic. We discovered new recognition algorithm, resulting from the combination of thioalkyl substituents head-to-head regiochemistry substitution, to induce spontaneous self-assembly sulfur overrich octathiophenes into crystalline fibers combining charge mobility intense fluorescence. The were grown on various types surfaces either as superhelices or straight rods depending...
Abstract Newly synthesized thiophene (T) and benzothiadiazole (B) co‐oligomers of different size, alternation motifs, alkyl substitution types are reported. Combined spectroscopic data, electrochemical analysis, theoretical calculations show that the insertion a single electron‐deficient B unit into aromatic backbone strongly affects LUMO energy level. The additional units has only minor effect on electronic properties. Cast films oligomers with two alternated rings (B–T–B inner core)...
Abstract A facile and efficient method based on electrochemistry for the production of graphene‐based materials electronics is demonstrated. Uncharged acetonitrile molecules are intercalated in graphite by electrochemical treatment, owing to synergic action perchlorate ions dissolved acetonitrile. Then, decomposed with microwave irradiation, which causes gas rapid exfoliation, an increase volume up 600 %. Upon further processing purification, highly dispersible nanosheets obtained that can...
This study reveals the capability of nanostructured organic materials to undergo pseudomorphic transformations, a ubiquitous phenomenon occurring in mineral kingdom that involves replacement phase with new one while retaining original shape and volume. Specifically, it is demonstrated postoxidation process induced by HOF·CH3CN on preformed thiophene-based 1D nanostructures preserves their macro/microscopic morphology remarkably altering electro-optical properties forming oxygenated phase....
Supercapacitors are devices for applications requiring high operating power levels, such as secondary sources in electric vehicles (EVs) to provide peak acceleration and hill climbing. While electronically conducting polymers yield different redox supercapacitor configurations, with the n‐doped polymer negative electrode p‐doped positive one most promising EV applications. Indeed, this type of has a potential, is able deliver all doping charge and, when charged, both electrodes (p‐ n‐doped)...
Here, we describe a simple approach to fabricate graphene-based field-effect-transistors (FETs), starting from aqueous solutions of graphene-oxide (GO), processed entirely under ambient conditions. The process relies on the site-selective reduction GO sheets deposited in between or surface micro/nanoelectrodes. same electrodes are first used for voltage-induced electrochemical reduction, and then as source drain contacts FETs, allowing straightforward production characterization ambipolar...
Organic molecular semiconductors are key components for a new generation of low cost, flexible, and large area electronic devices. In particular, ambipolar endowed with electroluminescent properties have the potential to enable photonic field-effect technology platform, whose building blocks emerging organic light-emitting transistor (OLET) To this aim, design innovative configurations combining effective electrical optical in solid state is highly desirable. Here, we investigate effect...
The synthesis via the Stille coupling of a new family oligomers derived from benzo[b]thiophene is reported. Owing to their branched molecular structure lacking any symmetry element, these compounds display low tendency crystallization and better film-forming properties than linear counterparts. Spin-coated films show photoluminescence efficiencies up 50 %. Light-emitting diodes with spin-coated as active layers markedly improved performance respect similar devices based on oligothiophenes,...
Abstract Four dyads comprised of corrole and coumarin units have been synthesised. Three coumarincarboxaldehydes were synthesized transformed into the corresponding trans ‐A 2 B‐corroles by reaction with 5‐(pentafluorophenyl)dipyrromethane. It has proven that this type direct condensation can lead to corroles in moderate yields. The hydroxybenzaldehydes vinylphosphonium salts identified as most general method for preparation formyl‐coumarins various patterns substituents. dyad consisting...
The design, synthesis and structure–property investigation of a new thienopyrrolyl dione substituted oligothiophene material showing reduced band gap energy, low lying LUMO energy level ambipolar semiconducting behaviour is described.
We describe the preparation of poly(3-hexylthiophene-S,S-dioxide) nanoparticles using Rozen's reagent, HOF·CH3CN, either on poly(3-hexylthiophene) (P3HT) or preformed P3HT (P3HT-NPs). In latter case, core-shell (P3HT@PTDO-NPs) are formed, as confirmed by X-ray photoelectron spectroscopy measurements, indicating presence oxygen outer shell. The different modalities lead to a fine-tuning chemical-physical properties nanoparticles. show that absorption and photoluminescence features,...
The cyclability performance of several composite polymer electrodes based on poly(thiophene) (pTh), poly(3‐methylthiophene) (pMeT), and poly[3‐(4‐fluorophenyl)thiophene] (pFPT), carbon, a binder is reported. These composites were tested for use as positive negative in supercapacitors electric vehicle (EV) applications. pTh characterized electrode, the pFPT negative, pMeT both electrode. Different types symmetric unsymmetric developed propylene carbonate‐tetraethylammonium tetrafluroborate...
A new class of oligothiophenes is realized by replacing the conventional linear structure with a branched benzo[b]thiophene‐based (see Figure). These compounds are used as active materials in light‐emitting diodes exhibiting record luminances up to 10 500 cd m –2 inset). Optical measurements and theoretical calculations show these performances mainly distorted molecular structure.
A platform is described for the first time facile synthesis of oligo‐ and polythiophene‐S‐oxides corresponding ‐S,S‐dioxides in short times, mild conditions, high yields. Employing ultrasound assistance, brominated thiophenes are selectively mono‐ or dioxygenated at room temperature. These building blocks then combined with metalated via microwave‐assisted cross‐coupling reactions through a “Lego‐like” strategy to afford unprecedented oligo/polythiophene‐S‐oxides mixed...
The electronic, optical, and redox properties of thiophene-based materials have made them pivotal in nanoscience nanotechnology. However, the exploitation oligothiophenes photodynamic therapy is hindered by their intrinsic hydrophobicity that lowers biocompatibility availability water environments. Here, we developed human serum albumin (HSA)–oligothiophene bioconjugates afford use insoluble physiological UV–vis electrophoresis proved conjugation oligothiophene sensitizers to protein....
A detailed photophysical characterization of a couple new perylene imide derivatives, carboxylic trisimide PIx, and an asymmetrically substituted bisimide PIa is presented. PIx have the lowest singlet excited state just below 2.6 eV. The dyes are remarkably fluorescent (ϕf = 0.37 ± 0.03 for ϕf 0.58 0.04 in toluene), but they also display efficient intersystem crossing. This leads to typical triplet photophysics/photochemistry, with intense absorption spectra oxygen (1Δg) photosensitization...
The synthesis and characterization of two thieno(bis)imide based n-type semiconductors with electron mobilities up to 0.3 cm(2) V(-1) s(-1) are described. relationships between the electronic features π-inner core functional properties new materials also discussed.