نتایج جستجو برای: fluorescent chemosensor
تعداد نتایج: 88142 فیلتر نتایج به سال:
BACKGROUND Pseudomonas aeruginosa (PA) and Burkholderia cepacia complex (Bcc), commonly found in the lungs of cystic fibrosis (CF) patients, often produce cyanide (CN), which inhibits cellular respiration. CN in sputa is a potential biomarker for lung infection by CF pathogens. However, its actual concentration in the infected lungs is unknown. METHODS AND FINDINGS This work reports observati...
A Ca(2+)-specific chemosensor involving acyclic non-ether and non-carboxylato-type metal chelating ligands is rare. The tetradentate OONO artificial receptor, HL, possessing a sulfur-containing intermediate siderophore aeruginic acid, tethered to a rhodamine 6G based signalling unit in a single molecule has been synthesized. The fluoroionophore required excitation in the visible wavelength (510...
A new pyrene derivative (1) containing a diaminomaleonitrile moiety exhibits high selectivity for Cu2þ detection. Significant fluorescence enhancement was observed with chemosensor 1 in the presence of Cu2þ. However, the metal ions Agþ, Ca2þ, Cd2þ, Co2þ, Fe2þ, Fe3þ, Hg2þ, Mg2þ, Mn2þ, Ni2þ, Pb2þ, and Zn2þ produced only minor changes in fluorescence values for the system. The apparent association...
A new coumarin-appended thioimidazole-linked imine conjugate, viz. has been synthesized and characterized. has been found to recognize Cu(2+) selectively among a wide range of biologically relevant metal ions. The chemosensing behavior of has been demonstrated through fluorescence, absorption, visual fluorescence color changes, ESI-MS and (1)H NMR titrations. The chemosensor showed selectivity ...
[reaction: see text] The development of an ion-selective chemosensor for Cd(2+) allows generation of a "real-time" sensor. Immobilization of the chemosensor on quartz was achieved in a simple monolayer and in a thin film using a polymer intermediary. As intended, the thin film contains much more chemosensor than the monolayer and provides measurable responses to aqueous Cd(2+) concentrations be...
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