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Shape-responsive host-guest chemistry: metal-free tetracationic porphyrin nonplanarity promoted by clay mineral interactions assessed by theoretical simulations.
Dalton Trans
January 2025
Departamento de Física dos Materiais e Mecânica, Instituto de Física, Universidade de São Paulo, C. P. 66318, São Paulo, SP, 05508-090, Brazil.
Distortions in the porphyrin core from planarity can trigger a unique structure-property relationship, imparting its basicity, chemical stability, redox potential, and excited-state energetics, among other properties. The colour change promoted by such distortion is signed by red shifts in its electronic absorption spectra. The adsorption of guest -substituted free-base porphyrin species onto inorganic hosts, such as clay minerals (layered aluminium or magnesium silicates), is known to further promote colour changes.
View Article and Find Full Text PDFEffective multicolor visual biosensor for ochratoxin A detection enabled by DNAzyme catalysis and gold nanorod etching.
Mikrochim Acta
December 2024
Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, People's Republic of China.
A novel detection technique is introduced that offers sensitive and reliable ochratoxin A (OTA) detection. The method leverages the etching of gold nanorods (AuNRs) stabilized by hexadecyl trimethyl ammonium bromide (CTAB) using the oxidized form of 3,3',5,5'-tetramethyl benzidine sulfate (TMB), creating a susceptible multicolor visual detection system for OTA. The visual detection is enabled by Mg-assisted DNAzyme catalysis combined with the catalytic hairpin assembly (CHA) signal amplification strategy.
View Article and Find Full Text PDFChlorophyll-Inspired Magnesium Porphyrin Array Membrane for Vis-Light-Enhanced Osmotic Energy Conversion.
ACS Appl Mater Interfaces
December 2024
Key Laboratory of Bio-Inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
Osmotic energy, a renewable clean energy, can be directly converted into electricity through ion-selective membranes. Inspired by the magnesium porphyrin (Mg) in plant chlorophyll, which absorbs vis-light and promotes photoelectric conversion, we demonstrate a Mg array membrane, realizing vis-light-enhanced ion transport regulation ability and osmotic energy conversion. The Mg arrays are self-assembled by a Mg-cored block copolymer under the coordination effect of block copolymer self-assembly and Mg π-π stacking, providing chloride-selective transport channels.
View Article and Find Full Text PDFFar-red light mediates light energy capture and distribution in soybeans (Glycine max L.) under the shade.
Plant Physiol Biochem
October 2023
College of Agronomy, Sichuan Agricultural University, Chengdu, 611130, PR China; Sichuan Engineering Research Center for Crop Strip Intercropping System, Chengdu, 611130, PR China. Electronic address:
Shade avoidance syndrome (SAS) is an important measure of how plants respond to shade. Shade conditions are characterized by low light density and low red-to-far-red light (R/FR) ratio. However, low light intensity and low R/FR ratio play considerable and diverse roles in SAS.
View Article and Find Full Text PDFHybrid Hydrogels of Polyacrylamide and Self-assembly Photodynamic Nanoparticles with Diverse Adhesion for Infected Chronic Wound Healing.
Biomacromolecules
November 2024
National Engineering Research Center for Biomaterials, College of Biomedical Engineering, Sichuan University, Chengdu 610065, China.
The healing of infected wounds is challenging for patients. In this paper, a hybrid hydrogel with strong tissue adhesion, self-healing, and antibiosis without antibiotics was developed as a dressing to promote the healing of infected chronic wounds. Acrylamide (PAM) was polymerized with ,-methylene bis(acrylamide) (BIS) as the substrate, and self-assembled nanoparticles of carboxymethyl chitosan and chlorin e6 (CMCS/Ce6 NPs) trapped with magnesium (Mg) ions were dispersed in the hydrogel substrate.
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