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Biomimetic polymeric nanoreactors with photooxidation-initiated therapies and reinvigoration of antigen-dependent and antigen-free immunity.
Biomaterials
March 2025
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China. Electronic address:
Immune cell-mediated anticancer modalities usually suffer from immune cell exhaustion and limited efficacy in solid tumors. Herein, the oxygen-carrying biomimetic nanoreactors (BNR2(O)) have been developed with photooxidation-driven therapies and antigen-dependent/antigen-free immune reinvigoration against xenograft tumors. The BNR2(O) composes polymeric nanoreactors camouflaged with cancer cell membranes can efficiently target homotypic tumors.
View Article and Find Full Text PDFHeterogenization of Homogeneous Donor-Acceptor Conjugated Polymers for Efficient Photooxidation: An Approach Toward Sustainable and Recyclable Photocatalysis.
ACS Appl Mater Interfaces
September 2024
Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
Recovery of homogeneous photocatalysts from reaction mixture is challenging, affecting the cost-effectiveness, and masks their advantages, including 4-8 fold higher catalytic activity than corresponding heterogeneous counterparts. Incorporation of long alkyl chains within the rigid π-conjugated backbone of conjugated polymers can augment their solubility in particular organic solvents; accordingly, they can function as homogeneous photocatalysts. Consequently, these polymers facilitate the recovery of catalysts through the reverse dissolution process, thus creating a well-suited platform to meet certain advantages of both homo- and heterogeneous photocatalysts.
View Article and Find Full Text PDFPhotosensitized Oxidative Damage from a New Perspective: The Influence of Before-Light and After-Light Reaction Conditions.
J Org Chem
September 2024
Department of Chemistry, Brooklyn College of the City University of New York, Brooklyn, New York 11210, United States.
Photooxidative damage is heavily influenced by the presence of bioactive agents. Conversely, bioactive agents influence the local environment, which in turn is perturbed by photooxidative damage. These sorts of processes give rise to a version of the "chicken-and-egg" quandary.
View Article and Find Full Text PDFAssessing the impact of simulated ocean acidification on the photodegradation of selected microplastics.
Mar Pollut Bull
October 2024
Laboratório de Microcontaminantes Orgânicos e Ecotoxicologia Aquática -, Instituto de Oceanografia -, Universidade Federal do Rio Grande (FURG). Caixa Postal 474, CEP: 96203-900, - Rio Grande, RS, Brazil.
Article Synopsis
- The study explored how ocean acidification affects the breakdown of three types of microplastics (PP, EPS, EVA) under UV light at different pH levels that mimic marine environments.
- Results showed that more acidic conditions led to higher degradation rates in the weathered microplastics, but EPS did not show significant changes.
- The findings suggest that saltwater acidification can intensify the photo-oxidation of microplastics, influenced by their composition.
Controlled Photooxidation via Singlet Oxygen Generation by Triplet Harvesting in a Heavy Atom Free Pure Organic Dithienylethene-Naphthalene Diimide.
Chemistry
November 2024
Department of Chemistry, Jadavpur University, Kolkata, 700032, India.
Noninvasive control over the reversible generation of singlet oxygen (O) has found the enormous practical implications in the field of biomedical science. However, metal-free pure organic emitters, connected with a photoswitch, capable of generating "on-demand" O via triplet harvesting remain exceedingly rare; therefore, the utilization of these organic materials for the reversible control of singlet oxygen production remains at its infancy. Herein, an ambient triplet mediated emission in quinoline-dithienylethene (DTE)-core-substituted naphthalene diimide (cNDI) derivative is unveiled via delayed fluorescence.
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