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Zinc and manganese complexes of porphyrin triads have been synthesized and are shown to be efficient as highly sensitive and selective tripod optical sensors for amines at the picomolar level.
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http://dx.doi.org/10.1021/ic200727f | DOI Listing |
Sensors (Basel)
August 2025
Petroleum Engineering Department, Colorado School of Mines, Golden, CO 80401, USA.
This study investigates the performance of Distributed Acoustic Sensing (DAS) for detecting gas pipeline leaks under controlled experimental conditions, using multiple fiber cable types deployed both internally and externally. A 21 m steel pipeline with a 1 m test section was configured to simulate leakage scenarios with varying leak sizes (¼", ½", ¾", and 1"), orientations (top, side, bottom), and flow velocities (2-18 m/s). Experiments were conducted under two installation conditions: a supported pipeline mounted on tripods, and a buried pipeline laid on the ground and covered with sand.
View Article and Find Full Text PDFJMIR AI
August 2025
Centre de recherche intégrée pour un système apprenant en santé et services sociaux, Centre intégré de santé et de services sociaux de Chaudière-Appalaches, Lévis, QC, Canada.
Background: Delirium is prevalent in intensive care units (ICUs), often leading to adverse outcomes. Hypoactive delirium is particularly difficult to detect. Despite the development of new tools, the timely identification of hypoactive delirium remains clinically challenging due to its dynamic nature, lack of human resources, lack of reliable monitoring tools, and subtle clinical signs including hypovigilance.
View Article and Find Full Text PDFSci Rep
July 2025
Baltic Institute of Advanced Technology, Pilies St. 16-8, LT-01403, Vilnius, Lithuania.
Optical adiabatons are specific shape-invariant pulse pairs propagating at the reduced group velocity and without optical absorption in the medium. The purpose of this study is to analyze the possibility of adiabaton formation in multilevel atomic systems with the focus on M-type and double tripod (DT) systems having five energy levels and different interaction configurations. Findings show that the M-type atomic system is prone to intensity dependent group velocity and pulse front steepening which prevents the formation of long range optical adiabatons.
View Article and Find Full Text PDFChem Asian J
August 2025
Functional Organic Molecules Synthesis Laboratory, Department of Chemistry, University of Delhi, Delhi, 110007, India.
In this work, we designed and synthesized D-A type tripodal phenothiazine derivatives to examine the influence of different functional groups on the photophysical properties and response to external stimuli. The compounds show emission in both solution and solid-state. Intramolecular charge transfer (ICT) characteristics are evidenced by the fluorescence studies revealing positive solvatochromism in compounds.
View Article and Find Full Text PDFChemistry
May 2025
Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector 81, SAS Nagar, Knowledge City, Manauli, Punjab, India.
Electron-deficient heptazine-based molecular and polymeric materials are a fast-growing area of research with their exciting electronic and optical properties, finding potential applications in catalysis, optoelectronics etc. However, the continuous thirst for the design of heptazine-core-based molecular systems has grown in interest in the search for a new class of materials. Herein, we have synthesized two heptazine core-based C-symmetric tripodal molecular systems decorated with three azobenzene and phenylazo-3,5-dimethylisoxazole as photoswitchable units connected through ─NH linker.
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