Double benzylidene ketones as photoinitiators for visible light photopolymerization

Article Chemistry, Applied

The three-component photoinitiating systems based on flavonol sulfonate and application in 3D printing

Jian You et al.

Summary: Three-dimensional printed photocurable shape-shifting polymers based on a three-component photo initiated system were studied, showing reversible modifications in shape through hydrophilic and thermal responses.

DYES AND PIGMENTS (2022)

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Article Chemistry, Applied

Near-infrared absorption of a benzothiophene-appended triphenylamine radical cation: A novel molecular design of NIR-II dye

Masafumi Yano et al.

Summary: A triphenylamine compound with three benzothiophene rings was synthesized with a high yield, showing absorption at 386 nm and NIR-II absorption at 1213 nm after one-electron oxidation. This compound demonstrated a high fluorescence quantum yield and thermostability.

DYES AND PIGMENTS (2022)

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Article Polymer Science

5,12-Dihydroindolo[3,2-a]carbazole: A promising scaffold for the design of visible light photoinitiators of polymerization

Fatima Hammoud et al.

Summary: The article presents a series of compounds based on the 5,12-dihydroindolo[3,2-a]carbazole scaffold, where selective introduction of different functional groups on the two carbazole moieties was achieved by controlling reaction conditions. Experimental evidence showed higher reactivity of one of the carbazoles, leading to the generation of asymmetrically substituted structures.

EUROPEAN POLYMER JOURNAL (2022)

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Article Polymer Science

Recent advances on visible light Phenothiazine-based photoinitiators of polymerization

Frederic Dumur

Summary: This review provides an overview of the recent developments concerning phenothiazine-based photoinitiators of polymerization, highlighting the evolution and structural changes of these molecules within photoinitiators. By comparing with reference photoinitiating systems, the pertinence of this approach is demonstrated.

EUROPEAN POLYMER JOURNAL (2022)

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Article Chemistry, Applied

A bis-acrylate functionalized enone as photoinitiator and crosslinker in photopolymerization

Tanlong Xue et al.

Summary: Enone dyes have attracted interest for their light absorption and photobleaching abilities in photoinitiation systems. A new bis-acrylate functionalized enone derivative, C3POAC, was synthesized and characterized for its potential dual role as a photoinitiator and a crosslinker. The reactivity of C3POAC was demonstrated through photolysis studies, showing efficient initiation with different acrylate monomers and polymerization profiles.

PROGRESS IN ORGANIC COATINGS (2022)

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Review Chemistry, Multidisciplinary

Advances in the E → Z Isomerization of Alkenes Using Small Molecule Photocatalysts

Tomas Nevesely et al.

Summary: Geometrical E → Z alkene isomerization, a critical topic in organic photochemistry, has seen significant advancements in recent years. By utilizing energy transfer catalysis, directed isomerization of alkenes can be achieved. This review summarizes the progress in the field of geometric alkene isomerization enabled by energy transfer catalysis from 2000 to 2020, and discusses the reaction mechanisms, induction models, and applications in total synthesis and regioselective reactions.

CHEMICAL REVIEWS (2022)

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Article Spectroscopy

BF2 group chelated AIE fluorescent probe for polarity mapping of lipid droplets in cells and in vivo

Chaofeng Lai et al.

Summary: The new fluorescent probes LDs-CA and LDs-BCA were designed to monitor the polarity and number variations of lipid droplets, showing strong positive solvatochromism effect and aggregation-induced emission effect in different solvents. These probes provided a powerful tool for fluorescence visualization of lipid droplets related biological processes and successfully imaged gastric fat in living obese mouse, suggesting a new idea for medical diagnostics.

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY (2022)

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Article Chemistry, Applied

Novel Norrish type I flavonoid photoinitiator for safe LED light with high activity and low toxicity by inhibiting the ESIPT process

Jian You et al.

Summary: A low-toxicity photoinitiator for photopolymerization under LED sources was developed and its photoinitiation activity was enhanced through chemical modification, leading to improved polymerization activity and reduced toxicity of the cured material.

DYES AND PIGMENTS (2021)

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Article Polymer Science

Recent advances on visible light photoinitiators of polymerization based on Indane-1,3-dione and related derivatives

Frederic Dumur

Summary: Visible light photoinitiators that can operate under low light intensity are actively researched to address safety concerns and high energy consumption issues associated with traditional UV photoinitiators. Among these, indane-1,3-dione has been identified as a promising scaffold for design of various structures in this last generation of photoinitiators. Comparisons with reference compounds are provided to evaluate the performance of these photoinitiators.

EUROPEAN POLYMER JOURNAL (2021)

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Article Chemistry, Physical

Synthesis and fluorescence quenching mechanism of novel naphthalimide derivative by nanographene oxide

Sanaz Seraj et al.

Summary: This study investigated the fluorescence quenching phenomenon of a novel naphthalimide derivative by nanographene oxide, revealing that the quenching was mainly due to a dynamic mechanism and involved an electron transfer process. important parameters such as binding constant, number of binding sites, and free energy change for the electron transfer process were calculated based on the fluorescence quenching data.

CHEMICAL PHYSICS LETTERS (2021)

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Article Chemistry, Applied

Synergistic effects of photoinduced electron transfer and heavy atom effect based on BODIPY for efficient triplet photosensitizers

Jae Moon Lee et al.

Summary: The newly designed donor-acceptor-heavy atom (D-A-H) compounds show outstanding performance in the field of triplet sensitizers, combining long triplet lifetime and high quantum yield.

DYES AND PIGMENTS (2021)

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Article Chemistry, Physical

Benzylidene piperidones as photosensitizers for visible light photopolymerization

Tianyu Hu et al.

Summary: Benzylidene piperidones with conjugated structure were synthesized and found to exhibit good photosensitizing properties to iodonium salts in LED photopolymerization. The synthesized dyes were effective initiators for radical polymerization and capable of deep curing under visible LED light source.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY (2021)

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Article Chemistry, Multidisciplinary

Radical-induced cationic frontal polymerisation for prepreg technology

Anh Dung Tran et al.

Summary: A new prepreg technology was established using a dual curing system, with HDDA and frontally polymerisable components based on epoxide resin. The study focused on the polymerisation of HDDA using BCPC as the radical initiator, without cationic ring-opening reaction of the epoxy. By investigating the effects of HDDA amount on radical polymerisation, stiffness of the gel, and thermal mechanical properties, the study successfully produced snowflake composite using RICFP-prepregs.

MONATSHEFTE FUR CHEMIE (2021)

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Article Chemistry, Physical

Facilitated interfacial charge separation using triphenylamine-zinc porphyrin dyad-sensitized TiO2 nanoparticles for photocatalysis

Yan Chen et al.

Summary: Three triphenylamine (TPA) substituted dichromophoric zinc porphyrins and a single zinc porphyrin were designed to construct dye-sensitized TiO2 nanoparticles for exploring the feasibility of dichromophoric dye design for photocatalysis. Among the investigated composites, XZP2/TiO2 showed the smallest charge transfer resistance and the longest electron lifetime, demonstrating the highest efficiency in photodegradation of polluted water samples. Electron paramagnetic resonance and radical quenching experiments revealed that superoxide radicals and holes are the priority reactive species at the porphyrin-sensitized TiO2 interface.

JOURNAL OF ALLOYS AND COMPOUNDS (2021)

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Article Chemistry, Physical

Enone dyes as visible photoinitiator in radical polymerization: The influence of peripheral N-alkylated (hetero)aromatic amine group

Tanlong Xue et al.

Summary: In this study, three enone dyes with different peripheral groups were synthesized and characterized to investigate their photoinitiation ability. The results showed that the peripheral group strongly affects the initiation efficiency, with different effects observed for different types of enone dyes. Experimental and theoretical calculations were performed to reveal the mechanism of the peripheral group's impact on the initiation efficiency.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY (2021)

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Article Chemistry, Applied

Mechanofluorochromism of Triphenylamine-BODIPY: Effect of twisted intramolecular charge transfer and restriction in rotation on fluorescence

Jae moon Lee et al.

Summary: This study demonstrated the mechanism of mechanofluorochromism based on D-A complexes by designing and synthesizing a specific compound and investigating the effect of external stimuli on molecular geometry. Experimental results showed a relationship between ICT and RIR characteristics and molecular geometry, highlighting the importance of geometry in determining emission properties.

DYES AND PIGMENTS (2021)

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Article Polymer Science

Design of photoinitiating systems based on the chalcone-anthracene scaffold for LED cationic photopolymerization and application in 3D printing

Shaohui Liu et al.

Summary: LEDs were used as irradiation sources in photopolymerization, with anthracene derivatives showing promising photoinitiation abilities for acrylates and epoxides. The in-silico designed chalcone-anthracenes exhibited broad absorption bands, leading to high final function conversions in the presence of three-component photoinitiating systems. The derivatives also sensitized sulfonium salts and showed good spatial resolution in 3D printing applications.

EUROPEAN POLYMER JOURNAL (2021)

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Article Polymer Science

N-ethyl carbazole-1-allylidene-based push-pull dyes as efficient light harvesting photoinitiators for sunlight induced polymerization

Ke Sun et al.

Summary: This article explores a new method using a series of push-pull dyes for the free radical polymerization of acrylates, demonstrating the potential application of these novel multi-component photoinitiating systems under sunlight and successfully achieving the preparation of 3D patterns with precise shapes.

EUROPEAN POLYMER JOURNAL (2021)

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Article Chemistry, Applied

Photopolymerization and 3D/4D applications using newly developed dyes: Search around the natural chalcone scaffold in photoinitiating systems

Hong Chen et al.

Summary: Chalcones have been synthesized with 18 different derivatives, serving as catalysts for both free radical and cationic polymerization. These dyes show excellent efficiency in acrylate polymerization under LED 405 nm, and can also promote the cationic polymerization of EPOX. Additionally, stereoscopic 3D patterns were successfully fabricated using the DLW technique, demonstrating reversible swelling properties and shape-memory effects.

DYES AND PIGMENTS (2021)

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Article Chemistry, Applied

Color evolution of a pyrrole-based enone dye in radical photopolymerization formulations

Tanlong Xue et al.

Summary: A new pyrrole-based ketone derivative (C3PY) was synthesized and characterized for its color evolution in photopolymerization. It was found that C3PY could initiate acrylate polymerization as a photoinitiator, with enhanced monomer conversion when triethanolamine was added, while combination with iodonium salt resulted in colored polymer formation. Various experiments and calculations were conducted to study the chromatic mechanism of C3PY in different formulations, revealing potential compounds responsible for the deep color in acrylate polymer. Overall, this work sheds light on the color change of pyrrole-based ketone dye in radical photopolymerization and its implications for understanding the chromatic behaviors of other dyes in such processes.

DYES AND PIGMENTS (2021)

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Article Chemistry, Applied

Fluorescent-brightener-mediated thiol-ene reactions under visible-light LED: A green and facile synthesis route to hyperbranched polymers and stimuli-sensitive nanoemulsions

Xiao-ling Zuo et al.

Summary: The study demonstrates a one-pot synthetic strategy that integrates visible-light LED-triggered photopolymerization and a thiol-ene click reaction, enabling the efficient synthesis of smart nanoparticles with pH-, redox-, and UV-responsive properties. This approach addresses the issues of low energy consumption, environmental friendliness, and easy operation, while also offering the advantages of visible light and aqueous reaction conditions.

DYES AND PIGMENTS (2021)

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Review Chemistry, Multidisciplinary

Radical photoinitiation with LEDs and applications in the 3D printing of composites

Yijun Zhang et al.

Summary: This review discusses the radical initiation upon LED light irradiation and its application in additive manufacturing, with a focus on the benefits of 3D printing through photopolymerization technology. It also provides an overview of the development of 3D printing of composites through photopolymerization, highlighting the challenges related to light penetration in filled matrices and discussing popular applications of 3D printing in various fields.

CHEMICAL SOCIETY REVIEWS (2021)

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Article Chemistry, Applied

Synthesis of 2,6,9-substituted xanthen-3-one and solvent effect on structural and photophysical properties

Taro Koide et al.

DYES AND PIGMENTS (2020)

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Article Polymer Science

Ketone derivatives as photoinitiators for both radical and cationic photopolymerizations under visible LED and application in 3D printing

Yangyang Xu et al.

EUROPEAN POLYMER JOURNAL (2020)

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Article Polymer Science

Metalated porphyrins as versatile visible light and NIR photoinitiators of polymerization

Guillaume Noirbent et al.

EUROPEAN POLYMER JOURNAL (2020)

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Article Chemistry, Physical

Visible light and water-soluble photoinitiating system based on the charge transfer complex for free radical photopolymerization

Jingfang Li et al.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY (2020)

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Article Chemistry, Applied

High performance dyes based on triphenylamine, cinnamaldehyde and indane-1,3-dione derivatives for blue light induced polymerization for 3D printing and photocomposites

Mira Abdallah et al.

DYES AND PIGMENTS (2020)

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Article Polymer Science

New bimolecular photoinitiating systems based on terphenyl derivatives as highly efficient photosensitizers for 3D printing application

Emilia Hola et al.

POLYMER CHEMISTRY (2020)

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Article Polymer Science

Molecular Origin of the Induction Period in Photoinitiated Cationic Polymerization of Epoxies and Oxetanes

Sungmin Park et al.

MACROMOLECULES (2019)

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Article Polymer Science

Curcuminoid-Based Difluoroboron Dyes as High-Performance Photosensitizers in Long-Wavelength (Yellow and Red) Cationic Photopolymerization

Weixiang Han et al.

MACROMOLECULAR RAPID COMMUNICATIONS (2019)

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Article Polymer Science

Photopolymerization of acrylate resin and ceramic suspensions with benzylidene ketones under blue/green LED

Hongyuan Fu et al.

POLYMER (2019)

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Article Chemistry, Physical

The effect of polyethylene glycoldiacrylate complexation on type II photoinitiator and promotion for visible light initiation system

Jingfang Li et al.

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY (2019)

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Review Chemistry, Multidisciplinary

Large-Area Organic Solar Cells: Material Requirements, Modular Designs, and Printing Methods

Guodong Wang et al.

ADVANCED MATERIALS (2019)

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Review Chemistry, Multidisciplinary

Printed Solar Cells and Energy Storage Devices on Paper Substrates

Francesca Brunetti et al.

ADVANCED FUNCTIONAL MATERIALS (2019)

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Article Chemistry, Physical

Twisted Intramolecular Charge Transfer States in Trinary Star-Shaped Triphenylamine-Based Compounds

Domantas Peckus et al.

JOURNAL OF PHYSICAL CHEMISTRY A (2018)

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Article Polymer Science

Facilely prepared blue-green light sensitive curcuminoids with excellent bleaching properties as high performance photosensitizers in cationic and free radical photopolymerization

Weixiang Han et al.

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Article Polymer Science

Successful UV-Induced RICFP of Epoxy-Composites

Nicolas Klikovits et al.

MACROMOLECULAR CHEMISTRY AND PHYSICS (2017)

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Review Chemistry, Organic

Recent Synthetic Methods for the Preparation of Charged and Uncharged Styryl-based NLO Chromophores: A Review

Zeynel Seferoglu

ORGANIC PREPARATIONS AND PROCEDURES INTERNATIONAL (2017)

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Review Chemistry, Multidisciplinary

Polymers for 3D Printing and Customized Additive Manufacturing

Samuel Clark Ligon et al.

CHEMICAL REVIEWS (2017)

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Threshold voltage modulation of polymer transistors by photoinduced charge-transfer between donor-acceptor dyads

Juho Kim et al.

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Organic Semiconductors based on Dyes and Color Pigments

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Article Polymer Science

D-D-A dyes with phenothiazine-carbazole/triphenylamine as double donors in photopolymerization under 455 nm and 532 nm laser beams

T. F. Zhou et al.

POLYMER CHEMISTRY (2016)

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Article Chemistry, Physical

Excimer Formation by Steric Twisting in Carbazole and Triphenylamine-Based Host Materials

Sergey A. Bagnich et al.

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Review Chemistry, Analytical

A perspective perception on the applications of light-emitting diodes

Govind B. Nair et al.

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Successful radical induced cationic frontal polymerization of epoxy-based monomers by C-C labile compounds

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Visible light sensitive photoinitiating systems: Recent progress in cationic and radical photopolymerization reactions under soft conditions

Pu Xiao et al.

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A Benzophenone-Naphthalimide Derivative as Versatile Photoinitiator of Polymerization Under Near UV and Visible Lights

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Review Polymer Science

Visible light initiating systems for photopolymerization: status, development and challenges

Jianzhong Shao et al.

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Article Engineering, Environmental

Photo-polymerization of acrylic/methacrylic gel-polymer electrolyte membranes for dye-sensitized solar cells

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CHEMICAL ENGINEERING JOURNAL (2013)

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Variations on the Benzophenone Skeleton: Novel High Performance Blue Light Sensitive Photoinitiating Systems

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Design of new Type I and Type II photoinitiators possessing highly coupled pyrene-ketone moieties

Mohamad-Ali Tehfe et al.

POLYMER CHEMISTRY (2013)

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Article Materials Science, Multidisciplinary

Characterization of mechanical properties of epoxy resin reinforced with submicron-sized ZnO prepared via in situ synthesis method

Ke Hong Ding et al.

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Two-Photon Absorption and the Design of Two-Photon Dyes

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MICROFLUIDICS AND NANOFLUIDICS (2008)

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Double benzylidene ketones as photoinitiators for visible light photopolymerization

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