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New Schiff base ligands with two metal binding sites have been prepared. Copper and zinc complexes of the ligands, which serve as models for rigid, conjugated metallopolymers, were synthesized and characterized. The copper complexes display only weak intramolecular antiferromagnetic interactions, suggesting that the polymer structure is not useful for developing magnetic materials. Preliminary investigations of the novel polymers, including the preparation of a conjugated zinc-containing polymer, are reported.
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http://dx.doi.org/10.1039/b903963e | DOI Listing |
ACS Appl Mater Interfaces
September 2025
College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, P. R. China.
Exhaled breath analysis offers noninvasive, early lung cancer detection via volatile organic compound (VOC) biomarkers, surpassing blood-based methods. Surface-enhanced Raman spectroscopy (SERS) is ideal for this purpose, combining molecular fingerprint specificity with single-molecule sensitivity. However, conventional SERS substrates face a fundamental limitation: while porous materials such as metal-organic frameworks effectively adsorb VOCs through their subnanometer pores (0.
View Article and Find Full Text PDFFEBS J
September 2025
Neutron Scattering Division, Oak Ridge National Laboratory, USA.
Serine hydroxymethyltransferase (SHMT) is a critical enzyme in the one-carbon (1C) metabolism pathway catalyzing the reversible conversion of L-Ser into Gly and concurrent transfer of 1C unit to tetrahydrofolate (THF) to give 5,10-methylene-THF (5,10-MTHF), which is used in the downstream syntheses of biomolecules critical for cell proliferation. The cellular 1C metabolism is hijacked by many cancer types to support cancer cell proliferation, making SHMT a promising target for the design and development of novel small-molecule antimetabolite chemotherapies. To advance structure-assisted drug design, knowledge of SHMT catalysis is crucial, but can only be fully realized when the atomic details of each reaction step governed by the acid-base catalysis are elucidated by visualizing active site hydrogen atoms.
View Article and Find Full Text PDFColloids Surf B Biointerfaces
September 2025
Kafkas University, Faculty of Arts and Sciences, Department of Chemistry, Kars, Turkiye.
The synthesis of two Schiff base (SB) compounds, 3-phenyl-4-(5-nitrofuran-1-yl)methyleneamino-4,5-dihydro-1H-1,2,4-triazol-5-one (3‒PNM) and 1-acetyl-3-phenyl-4-(5-nitrofuran-1-yl)methyleneamino-4,5-dihydro-1H-1,2,4-triazol-5-one (1-APNM) was successful. The structures of 3-PNM and 1-APNM were determined using ¹H/¹C-NMR and IR spectroscopy. Absorption and fluorescence spectroscopy were used to evaluate the compounds' interactions with BSA.
View Article and Find Full Text PDFInt J Biol Macromol
September 2025
Institute of Chemical Industry of Forest Products, CAF, Nanjing 210042, Jiangsu Province, China; Huaqiao University, Xiamen 361000, Fujian Province, China.
Biosens Bioelectron
September 2025
Cancer Research Institute, The First Affiliated Hospital, University of South China, Hengyang, 421001, PR China; State Key Laboratory of Chemo/Biosensing and Chemometrics, School of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, PR China. Electronic address:
A highly sensitive, selective, and simple method for detecting uranyl ions (UO) is crucial for human health and environmental safety. Amidoxime-based nanomaterials have been widely employed for UO detection, but their higher affinity for vanadium than UO limits their practical applications. Herein, a novel covalent organic polymer fluorescent probe (TT-COP) for UO detection was innovatively developed by a one-step Schiff-base condensation reaction between 3,3',5,5'-tetramethylbenzidine (TMB) and 2,4,6-triformylphloroglucinol (Tp).
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