Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
We report a fully organic pyridine-tetrapyrrolic U-shaped acyclic receptor , which prefers a supramolecular pseudo-macrocyclic dimeric structure () in a less polar, non-coordinating solvent (e.g., CHCl). Conversely, when it is crystalized from a polar, coordinating solvent (e.g., ,-dimethylformamide, DMF), it exhibited an infinite supramolecular one-dimensional (1D) "zig-zag" polymeric chain, as inferred from the single-crystal X-ray structures. This supramolecular system acts as a potential receptor for strong acids, e.g., -toluenesulfonic acid (PTSA), methane sulfonic acid (MSA), HSO, HNO, and HCl, with a prominent colorimetric response from pale yellow to deep red. The receptor can easily be recovered from the organic solution of the host-guest complex by simple aqueous washing. It was observed that relatively stronger acids with p < -1.92 in water were able to interact with the receptor, as inferred from H NMR titration in tetrahydrofuran- (THF-) and ultraviolet-visible (UV-vis) spectroscopic titrations in anhydrous THF at 298 K. Therefore, this new dynamic supramolecular receptor system may have potentiality in materials science research.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8004224 | PMC |
| http://dx.doi.org/10.3390/molecules26061771 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Medical treatment of fibroids: FIGO best practice guidance.
Int J Gynaecol Obstet
September 2025
Department of Gynecology and Obstetrics, Justus Liebig University Giessen, Giessen, Germany.
Even though uterine fibroids are a widespread condition, the range of approved medical treatment options remains limited. In fact, only a few drugs are officially approved for the therapy of fibroids. In both the USA and the European Medicines Agency region, selected gonadotropin-releasing hormone (GnRH) antagonists have been approved for this indication.
View Article and Find Full Text PDFIntegrative profiling of lung cancer biomarkers EGFR, ALK, KRAS, and PD-1 with emphasis on nanomaterials-assisted immunomodulation and targeted therapy.
Front Immunol
September 2025
Department of Thoracic Surgery, Shenzhen People's Hospital (The First Affiliated Hospital, Southern University of Science and Technology; The Second Clinical Medical College, Jinan University), Shenzhen, Guangdong, China.
Background: Lung cancer remains the leading cause of cancer-related mortality globally, primarily due to late-stage diagnosis, molecular heterogeneity, and therapy resistance. Key biomarkers such as EGFR, ALK, KRAS, and PD-1 have revolutionized precision oncology; however, comprehensive structural and clinical validation of these targets is crucial to enhance therapeutic efficacy.
Methods: Protein sequences for EGFR, ALK, KRAS, and PD-1 were retrieved from UniProt and modeled using SWISS-MODEL to generate high-confidence 3D structures.
Case Report: Acute polymorphic psychosis and NMDA-R IgG antibodies in serum: a follow-up case study.
Front Immunol
September 2025
Department of Psychiatry and Psychotherapy, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
Introduction: Anti-N-methyl-D-aspartate receptor (NMDA-R) encephalitis is a neuropsychiatric disorder with additional psychiatric features caused by NMDA-R immunoglobulin G (IgG) antibodies in cerebrospinal fluid (CSF). This report presents the follow-up of a patient in whom we assumed mild NMDA-R encephalitis in the first psychotic episode.
Case Study: A patient with a prior episode of an acute polymorphic psychotic syndrome relapsed five and a half years later following a severe COVID-19 infection.
Adult onset cryopyrin-associated periodic syndrome due to germline missense mutation in in a previously healthy middle-aged woman.
Front Immunol
September 2025
Division of Rheumatology, Department of Internal Medicine, Seoul National University Hospital, Seoul, Republic of Korea.
Background: Cryopyrin-associated periodic syndrome (CAPS) is an autoinflammatory disease caused by a gain-of-function mutation in the gene, which regulates inflammasome-mediated interleukin-1β (IL-1β) production. This leads to recurrent episodes of fever, rash, and arthritis, typically beginning in childhood.
Objective: To demonstrate the role of a missense mutation, c.
Antibacterial and antiviral properties of punicalagin (Review).
Med Int (Lond)
August 2025
Department of Epidemiology, School of Public Health, Zhengzhou University, Zhengzhou, Henan 450001, P.R. China.
Punicalagin, a polyphenolic compound extracted from pomegranate peel, has received increasing attention in recent years due to its antibacterial and antiviral properties. Punicalagin is capable of inhibiting bacterial growth at sub-inhibitory concentrations by affecting cell membrane formation, disrupting membrane integrity, altering cell permeability, affecting efflux pumps, interfering with quorum sensing and influencing virulence factors. Additionally, punicalagin inhibits viruses by modulating enzyme activity, interacting with viral surface proteins, affecting gene expression, blocking viral attachment, disrupting virus receptor interaction and inhibiting viral replication.
View Article and Find Full Text PDF