A combined DOSY and XRD study indicates that a carboxylcalix[5]arene receptor is able to encapsulate α,ω-diamines of appropriate length by means of a proton-transfer-mediated recognition process followed by salt-bridge-assisted bis-endo-complexation.
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http://dx.doi.org/10.1021/ol500673n | DOI Listing |
Biosens Bioelectron
December 2024
College of Chemistry, Jilin University, 130012, Changchun, China. Electronic address:
Acetylcholinesterase (AChE) and AChE inhibitors play critical roles in the early diagnosis and treatment of Alzheimer's disease (AD). Herein, a fluorescence/colorimetry/smartphone triple-mode sensing platform was constructed for both AChE activity monitoring and AChE inhibitor screening by exploring a Cu (I) compound, CuI (SR) (R = CHCHNH), as a fluorescent probe. In comparison of most other fluorescent probes, CuI (SR) presented exceptional stability against pH, temperature, UV irradiation, redox agents, and metal ions, as well as good recyclability due to its unique chemical structure.
View Article and Find Full Text PDFAdv Mater
December 2024
Division of Advanced Materials, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, China.
Semiconducting single-wall carbon nanotubes (s-SWCNTs) represent one of the most promising materials for surpassing Moore's Law and developing the next generation of electronic devices. Despite numerous developed approaches, reducing the contact resistance of s-SWCNTs networks remains a significant challenge in achieving further enhancements in electronic performance. In this study, antimony triiodide (SbI) is efficiently encapsulated within high-purity s-SWCNTs films at low temperatures, forming 1D SbI@s-SWCNTs vdW heterostructures.
View Article and Find Full Text PDFSensors (Basel)
November 2024
Department of Physics and Space Science, Royal Military College of Canada, Kingston, ON K7K 7B4, Canada.
Zr-2.5%Nb pressure tubes (PTs) house uranium fuel bundles in the fuel channels of CANDU nuclear reactors. Preventing a failure mode caused by contact of the PT with an outer calandria tube (CT) is performed by inspection using eddy current (EC) testing and ultrasonic testing (UT) to measure the PT-CT gap.
View Article and Find Full Text PDFMaterials (Basel)
November 2024
School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China.
With cellulose as the precursor and ethylenediamine as the N source, N-doped graphene quantum dots (N-GQDs) were synthesized by a simple and feasible one-pot hydrothermal method. The whole process did noSchemet need a strong acid or strong base and avoided interference from inorganic salt residues. The whole process lasted only 3 h and avoided any complex postprocessing.
View Article and Find Full Text PDFJ Mater Chem A Mater
December 2024
Empa, Swiss Federal Laboratories for Materials Science and Technology Dübendorf 8600 Switzerland
Battery research often encounters the challenge of determining chemical information, such as composition and elemental oxidation states, of a layer buried within a cell stack in a non-destructive manner. Spectroscopic techniques based on X-ray emission or absorption are well-suited and commonly employed to reveal this information. However, the attenuation of X-rays as they travel through matter creates a challenge when trying to analyze layers buried at depths exceeding hundred micrometers from the sample's surface.
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