Počet záznamů: 1
Metal-Cation Recognition in Water by a Tetrapyrazinoporphyrazine-Based Tweezer Receptor
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SYSNO ASEP 0458228 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Metal-Cation Recognition in Water by a Tetrapyrazinoporphyrazine-Based Tweezer Receptor Tvůrce(i) Lochman, L. (CZ)
Švec, J. (CZ)
Roh, J. (CZ)
Kirakci, Kaplan (UACH-T) SAI, RID, ORCID
Lang, Kamil (UACH-T) SAI, RID, ORCID
Zimčík, P. (CZ)
Nováková, V. (CZ)Celkový počet autorů 7 Zdroj.dok. Chemistry - A European Journal. - : Wiley - ISSN 0947-6539
Roč. 22, č. 7 (2016), s. 2417-2426Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova cations ; crown compounds ; fluorescent probes ; phthalocyanines ; sensors Vědní obor RIV CA - Anorganická chemie Institucionální podpora UACH-T - RVO:61388980 UT WOS 000369855000029 EID SCOPUS 84970883647 DOI 10.1002/chem.201504268 Anotace A series of zinc azaphthalocyanines with two azacrowns in a rigid tweezer arrangement were prepared and the fluorescence sensing properties were investigated. The size-driven recognition of alkali and alkaline earth metal cations was significantly enhanced by the close cooperation of the two azacrown units, in which both donor nitrogen atoms need to be involved in analyte binding to switch the sensor on. The mono- or biphasic character of the binding isotherms, together with the binding stoichiometry and magnitude of association constants (K-A), indicated specific complexation of particular analytes. Water solvation was shown to play an important role and resulted in a strong quenching of sensor fluorescence in the ON state. The lead compound was embedded into silica nanoparticles and advantageous sensing properties towards K+ were demonstrated in water ((F)=671nm, apparent K-A=82m(-1), increase of 17x), even in the presence of (supra)physiological concentrations of Na+ and Ca2+. Pracoviště Ústav anorganické chemie Kontakt Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Rok sběru 2017
Počet záznamů: 1