Article
Polymer Science
Hongwei Lu, Xiaoqun Zhu
Summary: In this work, a new D-π-A-π-D LED photoinitiator BBFC was designed with high molar excitation coefficient and photoinitiation efficiency, based on the principle of inhibition of photoisomerization. Introduction of a benzene ring on the BFC significantly improved the absorption wavelength, molar excitation coefficient and photoinitiation efficiency of BBFC. The characterization and theoretical calculation confirmed that BBFC has no photoisomerization due to the steric effect, and it exhibited higher initiation efficiency compared to commercial photoinitiator ITX under air condition.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Polymer Science
Chaima Brahmi, Mahmoud Benltifa, Mariem Ghali, Frederic Dumur, Corine Simonnet-Jegat, Valerie Monnier, Fabrice Morlet-Savary, Latifa Bousselmi, Jacques Lalevee
Summary: This study introduces a new photocatalytic material that combines polymers and polyoxometalates, effectively degrading organic compounds in water, especially bisphenol-A. The material shows excellent photocatalytic performance under different sources of irradiation.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Loic Buchon, Jean-Michel Becht, Laurent Rubatat, Wei Wang, Hua Wei, Pu Xiao, Jacques Lalevee
Summary: This research synthesized and characterized four potential phosphine oxide photoinitiators and evaluated their efficiency in photopolymerization at 405 nm wavelength. Two of the obtained photoinitiators showed better performance than the widely used commercial photoinitiator. Additionally, one of the synthesized photoinitiators was successfully used in 3D printing of thermoplastics and exhibited lower cytotoxicity compared to the benchmark structure.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Remi Canterel, Jacques Lalevee, Elodie Bourgeat-Lami, Emmanuel Lacote, Muriel Lansalot
Summary: Polystyrene particles were successfully synthesized in a mixture of ethanol and water using visible light and an optimized photoinitiating system. The addition of a base and the use of a specific stabilizer significantly improved the reproducibility and allowed for the formation of larger, narrowly distributed particles.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Davide Campagna, Robert Goestl
Summary: This study reports a mechanochemical protecting group for secondary amines that can be activated in polymers through force-induced reactions. The research demonstrates that this protecting group can produce free amines in polymers through bond scission, similar to its photochemical counterpart. Additionally, the protecting group is applied in a force-activated organocatalytic reaction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Polymer Science
Prashil D. Desai, Ramandand N. Jagtap
Summary: This study synthesized epoxy resins using different types of bisphenols to produce bisphenol-based epoxy acrylate (BEA), which were then subjected to UV curing experiments after adding a photoinitiator and evaluating the structural and performance properties of the resins.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Editorial Material
Chemistry, Multidisciplinary
Joakim B. Jakobsen, Magnus H. Ronne, Kim Daasbjerg, Troels Skrydstrup
Summary: The reduction of carbon dioxide is crucial for producing non-fossil-fuel-based feedstocks and mitigating greenhouse gas emissions. Amines play a critical role in these transformations, acting as CO2 trapping agents, proton shuttles, electron donors, and facilitators of CO2 reductions through formamide derivatives.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Polymer Science
Cansu Esen, Markus Antonietti, Baris Kumru
Summary: The incorporation of metal-free semiconductor graphitic carbon nitride (g-CN) into polymer systems offers new opportunities, such as acting as a photoredox polymer initiator. By decorating the inner surface of polymer beads with organomodified g-CN through suspension photopolymerization, beads with different properties can be prepared for dye degradation experiments. Additionally, photoinduced surface modification allows for easy transformation of the beads for various applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Polymer Science
Xabier Lopez de Pariza, Erick Cordero Jara, Nicolas Zivic, Fernando Ruiperez, Timothy E. Long, Haritz Sardon
Summary: The study investigates six novel photoacid generators based on anthrone and anthraquinone chromophores capable of producing three different acids upon light irradiation to trigger the ring-opening polymerization of cyclic esters. The efficiency of the catalyst is strongly related to the chromophore and sulfonate substituent. The study confirms their use as effective catalysts for cationic ring-opening polymerization of epsilon-CL in various conditions.
Article
Chemistry, Multidisciplinary
Kun-You Chung, Zachariah A. Page
Summary: This article introduces a new type of visible light photoinitiator that can polymerize acrylic-based resins to maximum conversion using low energy green light. The photoinitiator has the ability to access long-lived triplet excited states, which is promising for next generation manufacturing and biomedical applications.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Andrea Capasso, Joao Rodrigues, Matteo Moschetta, Francesco Buonocore, Giuliana Faggio, Giacomo Messina, Min Jung Kim, Junyoung Kwon, Ernesto Placidi, Fabio Benfenati, Mattia Bramini, Gwan-Hyoung Lee, Nicola Lisi
Summary: This study investigates the influence of graphene films with different electrical properties on the growth and maturation of primary cortical neurons, finding that high electrical conductivity alone is not essential for graphene-based neuronal interfaces. The results emphasize the importance of considering other physico-chemical characteristics, such as the atomic structure, in the design of functional and bio-friendly templates for neuroscience applications, expanding the spectrum of carbon-based materials suitable for such purposes.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Haruka Fukunishi, Mikihiro Hayashi, Shuto Ito, Naoki Kishi
Summary: This study proposes a practical patterning technique called digital photopatterning, using a commercial LCD 3D printer to integrate polymeric materials with distinct properties. The technique allows for precise control over material heterogeneity by irradiating a parent cross-linked film swollen by additional monomers and a photo radical initiator area-selectively. By exploring different combinations of parent film and monomers, unique functions such as shape morphing and arbitrary gel patterning within the film have been demonstrated. This practical and versatile technique has potential applications in materials science and engineering.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Chemistry, Physical
Fatemeh S. Tahsildaran F, Brendan Moore, Termeh Bashiri, Hatsuki Otani, Pavle Djuricanin, Rasoul Malekfar, Amir Hossein Farahbod, Takamasa Momose
Summary: This study investigated the effects of 147 nm vacuum ultraviolet radiation on H2O, HDO, and D2O isolated in solid parahydrogen matrices, revealing the photochemical reactions and pathways of these molecules.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Aicha Amior, Hamid Satha, Alessandra Vitale, Roberta Bongiovanni, Sara Dalle Vacche
Summary: This study focused on the preparation of composite self-standing films by combining microfibrillated cellulose (MFC) with photocured matrices. The influence of matrix polarity and surface tension on the properties of the composites was investigated. The results showed that the selection of matrix and the weight fraction of MFC affected the conversion and rate of the curing reaction, as well as the water vapor permeability of the films.
Article
Chemistry, Multidisciplinary
Kathleen J. Berger, Julia L. Driscoll, Mingbin Yuan, Balu D. Dherange, Osvaldo Gutierrez, Mark D. Levin
Summary: The study reports a reaction that selectively deaminates primary amines and anilines under mild conditions with remarkable functional group tolerance, including pharmaceutical compounds, amino acids, amino sugars, and natural products. An anomeric amide reagent facilitates the reaction through the intermediacy of an unprecedented monosubstituted isodiazene intermediate, simplifying deamination and enabling strategic applications of iminium and amine-directed chemistries as traceless methods. Mechanistic and computational studies support the intermedicacy of a primary isodiazene, which exhibits unexpected divergence from previously studied secondary isodiazenes, leading to cage-escaping, free radical species undergoing a chain hydrogen-atom transfer process with aliphatic and diazenyl radical intermediates.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)