Metal-Cation Recognition in Water by a Tetrapyrazinoporphyrazine-Based Tweezer Receptor

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388980%3A_____%2F16%3A00458228" target="_blank" >RIV/61388980:_____/16:00458228 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11160/16:10326170

Výsledek na webu

<a href="http://dx.doi.org/10.1002/chem.201504268" target="_blank" >http://dx.doi.org/10.1002/chem.201504268</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/chem.201504268" target="_blank" >10.1002/chem.201504268</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Metal-Cation Recognition in Water by a Tetrapyrazinoporphyrazine-Based Tweezer Receptor

Popis výsledku v původním jazyce

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+.

Název v anglickém jazyce

Metal-Cation Recognition in Water by a Tetrapyrazinoporphyrazine-Based Tweezer Receptor

Popis výsledku anglicky

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+.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CA - Anorganická chemie

OECD FORD obor

—

Projekt

<a href="/cs/project/GP14-02165P" target="_blank" >GP14-02165P: Červeně emitující fluorescenční senzory odvozené od struktury azaftalocyaninů: Studie aza-crownů jako rozpoznávací části</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Chemistry - A European Journal

ISSN

0947-6539

e-ISSN

—

Svazek periodika

22

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

10

Strana od-do

2417-2426

Kód UT WoS článku

000369855000029

EID výsledku v databázi Scopus

2-s2.0-84970883647