Article
Polymer Science
Yiwen Sun, Guangqun Zhai
Summary: This study focuses on the redox-initiated radical homo/co-polymerization of AAm using cerium(IV) ammonium nitrate (CAN) and investigates the mechanisms of co-polymerization under different conditions, as well as controlled radical homopolymerization. Different molecular weight ranges of PAAm-co-PDMAAm copolymers were obtained through these processes.
Article
Engineering, Environmental
Daliang Xu, Junfeng Zheng, Xin Zhang, Dachao Lin, Qieyuan Gao, Xinsheng Luo, Xuewu Zhu, Guibai Li, Heng Liang, Bart Van der Bruggen
Summary: Despite extensive research, fouling remains a major challenge for nanofiltration membranes. However, a highly antifouling membrane has been successfully fabricated by grafting poly(N-isopropylacrylamide) (PNIPAM) chains onto a bromine-containing polyamide layer. The resulting membrane exhibits double permeance compared to the pristine membrane, while maintaining the rejection of multivalent ions. Additionally, PNIPAM chains provide better deposition and adhesion resistance, reducing fouling and promoting flux recovery.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Tiziana Fuoco
Summary: The clever combination of ring-opening polymerization (ROP) and step-growth polymerization (SGP) allows for the design of a library of sequence-controlled polymers with diverse degradability functions. This strategy offers higher chemical diversity and control over primary structure, while being simple, effective, and atom-economical.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Polymer Science
Aurel Diacon, Edina Rusen, Florica Rizea, Adi Ghebaur, Daniela Berger, Raluca Somoghi, Andreea Matei, Petru Palade, Oana Tutunaru
Summary: The study developed an ATRP process for MMA polymerization using Fe(CO)(5) as co-initiator, demonstrating controlled characteristics and producing magnetic PMMA particles. The particles have porous characteristics and magnetic properties, making them suitable for use as catalyst supports, separation processes, or biomedical applications.
EUROPEAN POLYMER JOURNAL
(2021)
Review
Polymer Science
Alfred K. K. Fung, Michelle L. Coote
Summary: Atom transfer radical polymerization has become one of the most dominant methods in controlled radical polymerization since its invention 25 years ago. The rise in importance is largely due to increases in scope, reduced catalyst loading, and improved oxygen tolerance. These developments have been underpinned by an improved understanding of the mechanism, kinetics, and structure-reactivity trends.
POLYMER INTERNATIONAL
(2021)
Article
Polymer Science
Xiaoqiang Xue, Mingjian Feng, Hongting Pu, Fangli Cheng, Wenyan Huang, Hongjun Yang, Li Jiang, Qimin Jiang, Bibiao Jiang, Sridhar Komarneni
Summary: In this study, well-defined branched polystyrenes (BPS) were synthesized by combining self-condensing atom transfer radical copolymerization (ATRP) and Diels-Alder (DA)/retro-Diels-Alder (r-DA) reactions. The controlled synthesis of BPS with different morphologies was achieved through temperature induction, and the resulting BPS exhibited distinctive rheological behaviors in the melt and solution.
Article
Chemistry, Multidisciplinary
Neng Yang, Yu Jiang, Qinwen Tan, Jiahui Ma, Dezhi Zhan, Zhaohong Wang, Xin Wang, Daohong Zhang, Nikos Hadjichristidis
Summary: An efficient one-pot strategy for the structure-controlled synthesis of hyperbranched polymers (HBPs) has been developed. By using a latent inimer and regulating the temperature or stereochemistry, the release of maleimide (MI) and subsequent copolymerization can be controlled, leading to the synthesis of HBPs with various degrees of branching.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Yu Wang, Sushant P. Sahu, Alec J. Clay, Amanda J. Gildersleeve
Summary: By combining nitroxide radicals and ATRP active halogens into a functional reagent, simultaneous ATRP-NRC relay polymerization was successfully achieved, allowing for tailored macromolecular architecture and functionality by using different functional reagents.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Krushna K. Palodkar, N. N. Malleswara Rao, Soumya Iyer, Ramesh T. Puttalingaiah, Veera Sadhu, Tejraj M. Aminabhavi, Kakarla Raghava Reddy, Annadanam V. Sesha Sainath
Summary: Mono- and di-saccharide-based polymer architectures with different molecular weights and thermal stability were prepared through deacetylation. Deacetylated polymer architectures exhibited higher T-g values compared to acetylated ones. Maltose-based polymers showed higher thermal stability and T-g values than glucose-based polymers after deacetylation.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Shannon E. Wright, Aidan Clarkson, Jenna M. Korns, Ellie Haljun, Lila Lofving, Meheret Ourgessa, Yutan D. Y. L. Getzler
Summary: This paper presents a higher yielding and less toxic reagent utilizing synthesis method for gamma-(2-bromo-2-methylpropionate)-epsilon-caprolactone (BMPCL). By replacing pyridinium chlorochromate with a mild and nearly quantitative activated-DMSO mechanism, Swern oxidation, the yield is increased by approximately half while heavy metal usage is eliminated. Additionally, reducing the number of chromatographic purifications from three to one improves synthetic efficiency.
GREEN CHEMISTRY LETTERS AND REVIEWS
(2022)
Article
Engineering, Chemical
Joseph J. Andry, Jaenic J. Lee, Jessica Wu, Katherine Xia, Eric S. Tillman
Summary: The study aims to find universal reaction conditions for different polymers to achieve high extents of coupling. By adjusting the choice of radical traps, high extents of coupling were successfully achieved for PSBr, PMABr, and PMMABr.
Review
Chemistry, Multidisciplinary
Ruoyu Li, Weina Kong, Zesheng An
Summary: This Minireview discusses the key roles enzymes play in reversible deactivation radical polymerization (Enz-RDRP) and highlights their applications in surface brush fabrication, sensing, polymerization-induced self-assembly, and high-throughput synthesis. The authors also reflect on the challenges and future directions of this emerging area.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Organic
Atul Kumar Sharma, Jagadeesh Malineni, Simon Box, Sina Ghiassinejad, Evelyne van Ruymbeke, Charles-Andre Fustin
Summary: This study presents a synthetic platform for mono-functionalized tridentate macrocycles based on a pyridine-2,6-bis-carboxamide motif. By synthesizing square planar palladium complex-based pseudorotaxanes with different axles and functional groups, the potential of this macrocycle family is demonstrated in preparing polymer materials with rotaxane junctions and mechanically-linked gels.
ORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Polymer Science
Xiaoling Xu, Mei Hong, Chunyang Bao, Yan Wang, Jing Chen, Die Li, Tianheng Wang, Qiang Zhang
Summary: The claw-type Schiff base Py(3)Tren was utilized as an active ligand for photoinduced atom transfer radical polymerization (Photo-ATRP) with CuBr2 as the catalyst, enabling temporal control of the polymerization process and synthesis of well-defined poly(MMA) with high chain-end functionality confirmed by in situ chain extension. The polymerization mechanism was elucidated through UV/vis spectroscopy and electrospray ionization mass spectrometry (ESI-MS) experiments.
Article
Materials Science, Multidisciplinary
Kun-Yu Wang, Liang Feng, Tian-Hao Yan, Jun-Sheng Qin, Chen-Xuan Li, Hong-Cai Zhou
Summary: Controlled morphology replication is a powerful method for creating materials with specific shapes and functions. This study presents a novel strategy for fabricating hierarchical metal-organic framework (MOF)-on-polymer hetero-architectures, which allows for the introduction of various sizes, distributions, and concentrations of MOFs into the polymer matrix. The compositions of both MOF and polymer components are highly tunable, resulting in a diverse library of MOF/polymer hetero-architectures.
ACS MATERIALS LETTERS
(2021)
Article
Chemistry, Physical
Cian Cummins, Quentin Flamant, Ranjeet Dwivedi, Alberto Alvarez-Fernandez, Nils Demazy, Ahmed Bentaleb, Gwenaelle Pound-Lana, Marc Zelsmann, Philippe Barois, Georges Hadziioannou, Alexandre Baron, Guillaume Fleury, Virginie Ponsinet
Summary: This work presents an experimental demonstration of a thin gold metallic metasurface with near-perfect visible light absorption. By using block copolymer templating, gold nanoresonators with different heights were engineered and fabricated on a supporting layer and a reflecting mirror, forming a film-coupled nanoparticle structure, which represents a step forward towards large area flat optics applications.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Polymer Science
Naser Pouriamanesh, Florian Le Goupil, Natalie Stingelin, Georges Hadziioannou
Summary: By limiting mass transport/segmental chain motion, the thermal phase behavior of VDF-based polymers can be controlled, leading to improved long-term dielectric properties. Using P(VDF-ter-TrFE-ter-CFE) as an example, highly entangled systems and rapid solvent extraction are shown to reduce the change in relative permittivity and enhance phase stability. Additionally, thermal analysis and rheometry data can reliably identify processing routes for any given VDF-based polymer without the need for complex characterization methodologies.
Article
Chemistry, Analytical
Marina Galliani, Laura M. Ferrari, Esma Ismailova
Summary: This article proposes the fabrication of an organic sensor to monitor the integrity of surgical masks in order to ensure the health and safety of individuals during their use. The sensor does not affect the functionality and air permeability of the mask, and can track its barrier integrity through measuring humidity and respiration rate.
Article
Polymer Science
Guillaume Pino, Cian Cummins, Daniele Mantione, Nils Demazy, Alberto Alvarez-Fernandez, Stefan Guldin, Guillaume Fleury, Georges Hadziioannou, Eric Cloutet, Cyril Brochon
Summary: Our study reports the synthesis of high chi value BCPs which enable sub-10 nm line-space structures for a low degree of polymerization. These BCPs are a valuable addition to the toolbox for next-generation nanomanufacturing needs.
Article
Biochemistry & Molecular Biology
Lauriane Giraud, Stephane Grelier, Etienne Grau, Laurent Garel, Georges Hadziioannou, Brice Kauffmann, Eric Cloutet, Henri Cramail, Cyril Brochon
Summary: The synthesis of environmentally friendly pi-conjugated polymers is challenging. In this study, divanillin-based polyazomethines were synthesized using a potentially bio-based monomer. The polymerization process was achieved in 5 minutes with microwave irradiation and without any metallic catalyst, resulting in water as the only by-product. The structure and properties of the polyazomethines were characterized, and model compounds were used to confirm the E configuration and cross-conjugated nature of the divanillin-based polymers.
Article
Chemistry, Multidisciplinary
Xiaojiao Yuan, Cong Wang, Lorenzo Vallan, Anh Thy Bui, Gediminas Jonusauskas, Nathan D. McClenaghan, Chloe Grazon, Sabrina Lacomme, Cyril Brochon, Hynd Remita, Georges Hadziioannou, Eric Cloutet
Summary: Organic donor-acceptor-donor (D-A-D) polymers or small molecules are extensively examined in organic solar cells for their favorable properties. However, the study of conjugated small molecules with D-A-D structures as photocatalytically active materials is limited. This research demonstrates that the photocatalytic activity can be influenced by tuning the donor and acceptor units. In particular, the EBE trimer exhibits the best photophysical, chemical, and photocatalytic properties compared to other D-A-D combinations. The results suggest that organic small molecules with D-A-D structures offer new potential for efficient solar-to-chemical energy conversion.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Micah Barker, Tommaso Nicolini, Yasmina Al Yaman, Damien Thuau, Olga Siscan, Sasikumar Ramachandran, Eric Cloutet, Cyril Brochon, Lee J. Richter, Olivier J. Dautel, Georges Hadziioannou, Natalie Stingelin
Summary: A model mixed-conducting polymer blended with an amphiphilic block-copolymer shows significantly enhanced electro-chemical doping kinetics, resulting in faster electrochemical transistors with high transduction. This approach is robust, reproducible, and readily adaptable to other mixed conductors without exhaustive chemical modification.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Multidisciplinary
Cyril Routier, Lorenzo Vallan, Yohann Daguerre, Marta Juvany, Emin Istif, Daniele Mantione, Cyril Brochon, Georges Hadziioannou, Asa Strand, Torgny N. Nasholm, Eric Cloutet, Eleni Pavlopoulou, Eleni Stavrinidou
Summary: Increasing plants' photosynthetic efficiency is crucial for meeting the growing food demands of the population. In this study, we developed polyethyleneimine-based nanoparticles that can capture CO2 and enhance the carboxylation reaction in photosynthesis. These nanoparticles can be introduced to plants via leaf infiltration and do not have any toxic effects. Our results contribute to the development of a nanomaterials-based CO2-concentrating mechanism in plants that can potentially increase photosynthetic efficiency and overall CO2 storage.
Article
Chemistry, Multidisciplinary
Xiaojiao Yuan, Neus Sunyer-Pons, Aleix Terrado, Jose Luis Leon, Georges Hadziioannou, Eric Cloutet, Katherine Villa
Summary: Small molecule organic semiconductors (SMOSs) are a new class of photocatalysts with visible light absorption, tunable bandgap, good dispersion, and solubility. This study presents a 3D-printed hierarchical porous structure based on an organic conjugated trimer, EBE, which allows for the recovery and reusability of SMOSs. The 3D-printed EBE photocatalyst exhibits a longer lifetime and higher photocatalytic activity compared to the powder-state EBE.
Article
Nanoscience & Nanotechnology
Hajar Mousavi, Laura M. Ferrari, Amelia Whiteley, Esma Ismailova
Summary: In bioelectronics, conducting polymer coatings are used to reduce the impedance of metallic electrodes and facilitate the translation of bioelectrical signals. These coatings can be made by thin film deposition from a solution or direct synthesis via electrodeposition. The mechanical stability of such coatings is a challenge due to poor adhesion and film cracking.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Florian Le Goupil, Guillaume Payrot, Sokha Khiev, Wiljan Smaal, Georges Hadziioannou
Summary: Flexible temperature sensors printed on flexible substrates using low-cost silver particle ink and screen-printing process allow temperature monitoring in wearable healthcare devices. The sensors achieve high temperature resolution of 10 m degrees C and demonstrate versatility for various applications including in situ heat flux measurements and thermal conductivity measurements on thin polymer films.
Article
Engineering, Biomedical
Marina Galliani, Laura M. Ferrari, Guenaelle Bouet, David Eglin, Esma Ismailova
Summary: Inkjet printing is a cost-efficient technique for device prototyping and manufacturing, offering digital design freedom, non-contact, and additive fabrication. This study proposes a tailor-made ink formulation based on non-hazardous materials for developing green electronic devices that interface with humans. The developed ink exhibits high-resolution inkjet printability on multiple wearable substrates, with enhanced electrical properties, mechanical flexibility, and water stability. Cytocompatibility evaluations show no harmful effects on human mesenchymal stem cells. A printed wearable touch sensor capable of tracking human steps is fabricated, demonstrating the viability of materials and processes for biocompatible devices.
APL BIOENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Florent Pawula, Solene Perrot, Georges Hadziioannou, Guillaume Fleury
Summary: Among functional materials, pi-conjugated polymers are attractive for large-scale or wearable applications due to their electronic and soft-matter properties. Poly (3,4-ethylenedioxythiophene) (PEDOT) based materials are considered as the flagships of polymer electronics because of their tunable doping level for different electronic transport behaviors. Nanopatterning of pi-conjugated polymers, such as PEDOT, is of high interest for future developments in polymer electronics and can be achieved through block copolymer lithography using self-assembled poly(styrene)-block-poly(methyl methacrylate) (PS-b-PMMA) layers as masks. By re-doping the nanotextured PEDOT:Tos layer, doped-PEDOT nanostructures with recovered electronic states can be obtained.
ORGANIC ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Silvia Mariotti, Daniele Mantione, Samy Almosni, Milutin Ivanovi, Takeru Bessho, Miwako Furue, Hiroshi Segawa, Georges Hadziioannou, Eric Cloutet, Thierry Toupance
Summary: This study focuses on the development of perovskite solar cells with improved efficiency and stability. By using K+-doped formamidinium (FA)-based perovskite as the absorber layer, the researchers were able to fabricate efficient solar cells with low hysteresis and better stability. The novelty of this work lies in the use of poly(ionic liquid)s (PILs) as additives for the absorber layer, which have been shown to enhance device performance and reduce degradation. Both ionic liquids (ILs) and PILs are valuable passivation molecules for perovskite grain boundaries, promoting charge diffusion and protecting the perovskite layer.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Correction
Chemistry, Multidisciplinary
Daniela Parker, Yohann Daguerre, Gwennael Dufil, Daniele Mantione, Eduardo Solano, Eric Cloutet, Georges Hadziioannou, Torgny Nasholm, Magnus Berggren, Eleni Pavlopoulou, Eleni Stavrinidou
MATERIALS HORIZONS
(2022)
