On February 5, 2021, Quiroga-Campano, Cinthia; Gomez-Machuca, Horacio; Moris, Silvana; Pessoa-Mahana, Hernan; Jullian, Carolina; Saitz, Claudio published an article.Product Details of 574-98-1 The title of the article was Synthesis of calix[4]arenes bearing thiosemicarbazone moieties with naphthalene groups: Highly selective turn off/on fluorescent sensor for Cu(II) recognition.. And the article contained the following:
Calix[4]arenes-based fluorescent chemosensors containing thiosemicarbazone as a binding site and naphthalene as a fluorogenic unit in a 1,3-alternate (L1) and cone (L2) conformation, were synthesized and examined for their binding abilities towards anions and cations using different spectroscopic techniques. Both receptors L1 and L2, exhibited an off/on fluorescence behavior due to complex formation with Cu(II). They showed selective recognition of Cu(II) in presence of other cations and anions detecting up to 4.25 μg/L for L1 and 1.58 μg/L for L2, both in acetonitrile. The complexation behavior was studied by 1H NMR and FT-IR spectral anal., indicating that copper interacts with sulfur and with imine nitrogen of the thiosemicarbazone. No major differences in the selectivity and sensitivity were found between calix[4]arene receptors in 1,3-alternate and cone conformation. The 1H NMR spectra indicates that receptor L2 changed its conformation from cone to pinched cone, stiffening the conformation due to interaction of the thiosemicarbazone moiety with copper. The experimental process involved the reaction of 2-(2-Bromoethyl)isoindoline-1,3-dione(cas: 574-98-1).Product Details of 574-98-1
The Article related to calixarene fluorescent indicator copper ion, Placeholder for records without volume info and other aspects.Product Details of 574-98-1
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