The development of artificial receptors for efficient recognition of analytes in water is a challenging task. Homooxacalix[3]arene-based receptor , which is selective toward primary ammoniums in organic solvents, was transferred into water following two different strategies: direct solubilization and micellar incorporation. Extensive H NMR studies showed that recognition of ammoniums is only observed in the case of micellar incorporation, highlighting the beneficial effect of the microenvironment of the micellar core. The selectivity of the system for primary ammoniums over secondary and tertiary ones was also maintained. The hydrophobic effect plays an important role in the recognition properties, which are counterion-dependent due to the energy penalty for the dissociation of certain ammonium salts in the apolar micellar core. This study shows that the straightforward self-assembly process used for the encapsulation of artificial receptors in micelles is an efficient strategy for developing water-soluble nanosized supramolecular recognition systems.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.joc.2c01318 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Research review and transcriptomic insights into Benzalkonium chloride inhalation and disease association.
Ecotoxicol Environ Saf
January 2025
College of Pharmacy, Korea University, Sejong 30019, South Korea. Electronic address:
The widespread use of disinfectants, particularly during the coronavirus disease (COVID-19) pandemic, has significantly increased human exposure to biocides, raising concerns about their potential health risks, especially when inhaled. Benzalkonium chloride (BKC), a quaternary ammonium compound commonly used as a disinfectant and preservative, is a notable example because it is frequently used in household products and medical settings. Despite its broad usage, limited research has been conducted on the respiratory and systemic toxicities of BKC.
View Article and Find Full Text PDFOral Health-Related Quality of Life of Children Following Different Treatment Regimens of Silver Diammine Fluoride.
J Dent Child (Chic)
September 2024
Department of Oral Biology, Dr. Gerald Niznick College of Dentistry, Winnipeg, Manitoba, Canada.
To investigate the oral health-related quality of life (OHRQoL) of young children in a randomized clinical trial (RCT) of silver diammine fluoride (SDF) and five percent sodium fluoride varnish (NaFV) to manage early childhood caries (ECC). Children younger than 72 months of age with active dentinal caries lesions (ICDAS 5 or 6) in primary teeth received two applications of 38 percent SDF and five percent NaFV as part of an RCT testing three different frequency regimes (one, four, and six months apart). The Early Childhood Oral Health Impact Scale (ECOHIS) questionnaire was completed at three study visits.
View Article and Find Full Text PDFComponent analysis and source identification of atmospheric aerosols at the neighborhood scale in a coastal industrial city in China.
Environ Pollut
December 2024
State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.
A multiple-site filter-sampling observation study was conducted in a coastal industrial city (Rizhao, 35°10'59″N, 119°23'57″E) to understand the main components, formation mechanisms, and potential sources of particulate matter. The average (±σ) mass concentration of PM across all the sites was 42 (±27) μg/m, with high variability (6-202 μg/m). Water-soluble inorganic ions (WSIIs) were the major contributors (54%-60%) to PM with mean values for sulfate (13 μg/m), nitrate (6 μg/m), and ammonium (7 μg/m) (SNA).
View Article and Find Full Text PDFEffects of nitrogen deposition on soil nitrogen fractions and enzyme activities in wet meadow of the Qinghai-Tibet Plateau.
Sci Rep
December 2024
Wushan County Productivity Promotion Center, Tianshui, 741300, China.
Soil nitrogen (N) transformation is an essential portion of the N cycle in wetland ecosystems, governing the retention status of soil N by controlling the effective soil N content. N deposition produced by human activities changes the physical characteristics of soil, affecting N fractions and enzyme activities. To characterize these influences, three different N addition levels (N5, 5 g/m; N10, 10 g/m; N15, 15 g/m) were established using a wet meadow on the Qinghai-Tibet Plateau (QTP) as a control treatment (0 g/m).
View Article and Find Full Text PDFOccurrence and ecological risks of antibiotics and antiparasitics in surface water in urban lakes in Hanoi city, Vietnam.
Environ Sci Pollut Res Int
December 2024
Institute of Natural Products Chemistry, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Road, Cau Giay, Hanoi, Vietnam.
The presence of antibiotics in the environment is of significant concern due to their adverse effects on aquatic ecosystems. This study provides an assessment of potential ecological risks (RQ) associated with the concentrations of eight antibiotics and antiparasitics (amoxicillin-AMO, azithromycin-AZI, ciprofloxacine-CIP, ofloxacine-OFL, oxfendazole-OXF, lincomycin-LIN, sulfacetamide-SCE and sulfamethoxazole-SME) in the surface water of 13 urban lakes in Hanoi city, Vietnam during the period 2021-2023. The findings revealed considerable variations in the total concentrations of these 8 substances (T), ranging from below the method detection limit (< MDL) to 2240 ng L with an average of 330.
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!