A5001001181- Advanced Polymer Synthesis and Characterization
- Photopolymerization techniques and applications
- Innovative Microfluidic and Catalytic Techniques Innovation
- Additive Manufacturing and 3D Printing Technologies
- Antimicrobial agents and applications
- Photochromic and Fluorescence Chemistry
- Luminescence and Fluorescent Materials
- Nanoplatforms for cancer theranostics
- Polymer composites and self-healing
- Block Copolymer Self-Assembly
- Antifungal resistance and susceptibility
- Radical Photochemical Reactions
- Polymer Surface Interaction Studies
- Click Chemistry and Applications
- Microfluidic and Capillary Electrophoresis Applications
- Antimicrobial Peptides and Activities
- Injection Molding Process and Properties
- Chemical Synthesis and Analysis
- Photodynamic Therapy Research Studies
- Dendrimers and Hyperbranched Polymers
- Membrane Separation and Gas Transport
- Hydrogels: synthesis, properties, applications
- Nanofabrication and Lithography Techniques
- Supercapacitor Materials and Fabrication
- Epoxy Resin Curing Processes
ARC Centre of Excellence in Advanced Molecular Imaging
2016-2025
UNSW Sydney
2015-2025
Robert Bosch (Germany)
2021-2023
Cramer Fish Sciences (United States)
2019
The University of Sydney
2016
Queen's University Belfast
1994-2004
Queens University
1994
The production of a range acrylate and acrylamide polymers in completely open reaction vessels has been achieved utilizing the PET-RAFT polymerization technique with zinc tetraphenylporphyrin (ZnTPP) as photoredox catalyst. Polymerization was conducted under extremely mild conditions; low-intensity yellow light, ambient temperatures, dimethyl sulfoxide (DMSO) solvent were used. resulting display characteristics typical RAFT polymerization, narrow molecular weight distributions (typically, Đ...
We report a photoinduced living polymerization technique able to polymerize large range of monomers, including methacrylates, acrylates and acrylamides, in water biological media as well organic solvents. This employs ultra-low concentrations ruthenium-based photoredox catalyst (typically 1 ppm monomers) enables low energy visible LED light afford well-defined polymers with narrow polydispersities (Mw/Mn < 1.3). In this paper, different parameters, photocatalyst solvent effects, were...
Abstract In this study, porphyrinic zirconium (Zr) MOFs were investigated as heterogeneous photocatalysts for photoinduced electron transfer‐reversible addition‐fragmentation chain transfer (PET‐RAFT) polymerization of various monomers under a broad range wavelengths, producing polymers with high monomer conversions, narrow molecular weight distributions, low dispersity and good chain‐end fidelity. Screening Zr‐MOFs (Zn) containing Zn‐metalled ligands demonstrated that MOF‐525 the smallest...
Abstract RAFT facilitated digital light projection 3D printing of polymeric materials provides a convenient and facile route for inducing post‐fabrication transformations via reactivation dormant chain transfer agents. In this work, we report the use Norrish type I photoinitiator in conjunction with agent to produce variety open‐air printable resins that rapidly cure under visible irradiation. The photoinitiator‐RAFT system polymerizes extremely quickly high build rates up 9.1 cm h −1 ,...
Although 3D printing allows the macroscopic structure of objects to be easily controlled, controlling nanostructure printed materials has rarely been reported. Herein, we report an efficient and versatile process for fabricating with controlled nanoscale structural features. This approach uses resins containing macromolecular chain transfer agents (macroCTAs) which microphase separate during photoinduced form nanostructured materials. By varying length macroCTA, demonstrate a high level...
Molecular weight distribution plays an important role by giving specific properties to polymeric materials. Despite the recent progress in controlled/"living" radical polymerization, polymer chemists do not have ability tune and manipulate shape of molecular distributions (MWDs) (except for a few examples). In this article, new synthetic procedures been developed controlling MWDs using photoinduced electron/energy transfer–reversible addition-fragmentation chain transfer (PET-RAFT)...
We report a photoinduced electron/energy transfer–reversible addition-fragmentation chain transfer (PET-RAFT) dispersion polymerization mediated by 5,10,15,20-tetraphenyl-21H,23H-porphine zinc (ZnTPP) under low energy red (λmax = 635 nm) or yellow light 560 nm). By varying the degrees of for hydrophobic block, nanoparticles different morphologies (spheres, wormlike micelles, and vesicles) were formed at high monomer conversion (>98%) visible irradiation. Interestingly, encapsulation ZnTPP...
Abstract Reversible addition‐fragmentation chain‐transfer (RAFT) polymerization is a valuable tool for synthesizing macromolecules with controlled topologies and diverse chemical functionalities. However, the application of RAFT to additive‐manufacturing processes has been prevented due slow rates typical systems. In this work, we developed optimized rapid visible (green) light mediated process applied it an open‐air 3D printing system. The reaction components are non‐toxic, metal free...
By examining structurally similar halogenated xanthene dyes, this study establishes a guiding principle for resolving structure–property–performance relationships in the photocontrolled PET-RAFT polymerization system (PET-RAFT: photoinduced electron/energy transfer–reversible addition–fragmentation chain transfer). We investigated effect of halogen substituents on photophysical and electrochemical properties dyes acting as photocatalysts their resultant performance polymerization....
Abstract The application of photochemistry to polymer and material science has led the development complex yet efficient systems for polymerization, post‐functionalization, advanced materials production. Using light activate chemical reaction pathways in these not only leads exquisite control over dynamics, but also allows synthetic protocols be easily achieved. Compared polymerization mediated by thermal, chemical, or electrochemical means, photoinduced can potentially offer more versatile...
Natural biopolymers, such as DNA and proteins, have uniform microstructures with defined molecular weight, precise monomer sequence, stereoregularity along the polymer main chain that affords them unique biological functions. To reproduce structurally perfect polymers understand mechanism of specific functions through chemical approaches, researchers proposed using synthetic an alternative due to their broad diversity relatively simple manipulation. Herein, we report a new methodology...
We report for the first time use of phthalocyanine compounds, in conjunction with common solvent N-methyl-2-pyrrolidone (NMP), as a photoinitiation system radical polymerization under various visible and near-infrared wavelengths. A library redox-inactive metallic compounds were investigated their ability to act photosensitizers these new two-component systems, (meth)acrylate (meth)acrylamide monomers. Conventional conditions was successful, moreover, addition reversible...
We report a novel semicontinuous method for producing polymer mixtures with tailored molecular weight distributions (MWDs) and chemical compositions. In contrast to recent methods disclosed the production of MWDs, current approach allows MWD be at any point in multistep process. Optimization photoflow polymerization process has been performed, where fractions variable compositions can produced independently processed downstream. This independent processing complex tedious operations...
In this work, we adopted a fully computer-guided strategy in discovering an efficient pH-switchable organic photocatalyst (OPC), unprecedentedly turning colorless at pH 5 and recovering strong visible-light absorption photoactivity 7. This is the first example of OPC design guided by comprehensive density functional theory (DFT) studies covering electrostatic, electrochemical, photophysical predictions. Characterization designed after synthesis confirmed computational We applied to mediate...
The combination of high-throughput (HTP) processes and flow-mediated synthesis allows large data sets to be generated quickly while also permitting quantities materials prepared in a continuous fashion. In this work, the benefits well-plate-based HTP polymerization chemistry are used streamline screening upscaling value-added biomedical through robust photopolymerization strategy, namely, photoinduced electron/energy transfer-reversible addition–fragmentation chain transfer (PET-RAFT)...
Abstract Ultrathin porphyrinic 2D MOFs, ZnTCPP nanosheets (TCPP: 5,10,15,20‐(tetra‐4‐carboxyphenyl) porphyrin) were employed as heterogeneous photocatalysts to activate PET‐RAFT polymerization under various wavelengths ranging from violet orange light. High rates, oxygen tolerance, and precise temporal control achieved. The polymers showed narrow molecular weight distributions good chain‐end fidelity. applied in stereolithographic 3D printing an open‐air environment blue light yield...