Herein, a detailed investigation of the adsorption and dynamics of C60 and C70 fullerenes hosted in a self-assembled, two-dimensional, nanoporous porphyrin network on a solid Ag surface is presented. Time-resolved scanning tunneling microscopy (STM) studies of these supramolecular systems at the molecular scale reveal distinct host-guest interactions giving rise to a pronounced dissimilar mobility of the two fullerenes within the porphyrin network. Furthermore, long-range coverage-dependent interactions between the all-carbon guests, which clearly affect their mobility and are likely mediated by a complex mechanism involving the Ag substrate and the flexible porphyrin host network, are observed. At increased fullerene coverage, this unprecedented interplay results in the formation of large fullerene chains and islands. By applying a lattice gas model with nearest-neighbor interactions and by evaluating the fullerene-pair distribution functions, the respective coverage-dependent guest-guest interaction energies are estimated.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/cphc.200600186 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Proteomic and metabolomic insights into the impact of topping treatment on cigar tobacco.
Front Plant Sci
February 2025
Haikou Cigar Research Institute, Hainan Province Company, China National Tobacco Corporation, Haikou, China.
Top removal is a widely utilized method in production process of tobacco, but little is known regarding the way it impacts protein and metabolic regulation. In this study, we investigated the underlying processes of alterations in cigar tobacco leaves with and without top removal, using a combined proteomic and metabolomic approach. The results revealed that: (1) Topping significantly affected superoxide anion (O ) levels, superoxide dismutase (SOD) activity, and malondialdehyde (MDA) content, (2) In the cigar tobacco proteome, 385 differentially expressed proteins (DEPs) were identified, with 228 proteins upregulated and 156 downregulated.
View Article and Find Full Text PDFGraphene-based FETs for advanced biocatalytic profiling: investigating heme peroxidase activity with machine learning insights.
Mikrochim Acta
March 2025
Institute of Microelectronics and Microsensors, Johannes Kepler University, Linz, Austria.
Graphene-based field-effect transistors (GFETs) are rapidly gaining recognition as powerful tools for biochemical analysis due to their exceptional sensitivity and specificity. In this study, we utilize a GFET system to explore the peroxidase-based biocatalytic behavior of horseradish peroxidase (HRP) and the heme molecule, the latter serving as the core component responsible for HRP's enzymatic activity. Our primary objective is to evaluate the effectiveness of GFETs in analyzing the peroxidase activity of these compounds.
View Article and Find Full Text PDFRational Fabrication of a Robust, Exfoliatable Catechol-Porphyrin Covalent Network for Enhanced HO Photosynthesis.
Small
March 2025
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fujian, 350108, China.
Covalent organic frameworks (COFs) containing dioxin-linkages are highly valued for their exceptional chemical stability, which is essential for practical use. However, research on dioxin-based COFs remains limited. Herein, a unique nonplanar 2D COF, designated as TCP-COF, constructed from catechol-porphyrin units interconnected by 1,4-dioxin bonds, exhibiting a staggered AAA stacking pattern, is presented.
View Article and Find Full Text PDFPCR array analysis reveals a novel expression profile of ferroptosis-related genes in idiopathic pulmonary fibrosis.
BMC Pulm Med
February 2025
Lung Transplant Center, The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi People's Hospital, Wuxi Medical Center, Nanjing Medical University, 299 Qingyang Road, Wuxi, 214023, Jiangsu, China.
Background: Idiopathic pulmonary fibrosis (IPF) is a chronic, irreversible, and fatal disease characterized by progressive interstitial lung fibrosis. Given its insidious onset and poor outcome, there is an urgent need to elucidate the molecular mechanisms underlying IPF and identify effective therapeutic targets and diagnosis and prognosis biomarkers. Ferroptosis is an iron-dependent form of programmed cell death that occurs as lipid peroxides accumulate.
View Article and Find Full Text PDF"Turn-on" mode fluorescence detection of amines based on a cationic covalent organic framework linked with C-C single bond.
J Hazard Mater
February 2025
Research Centre for Analytical Sciences, College of Chemistry, Nankai University, Tianjin 300071, PR China. Electronic address:
Developing methods to detect amine pollutants at trace levels is urgently needed due to their high toxicity to both human health and environment. Covalent organic frameworks (COFs) have emerged as promising candidates for amine sensing due to their exceptional stability when exposed to corrosive amines. While several COF-based sensors have recently been developed for amine detection, to the best of our knowledge, fluorescent "turn-on" sensors have been limited to imine-linked COFs.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!