Naslov
PH and metal sensing properties of benzimidazole based Schiff bases

Autori
Horak, Ema ; Hranjec, Marijana ; Perin, Nataša ; Vianello, Robert ; Krištafor, Svjetlana ; Steinberg, Ivana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
25. Hrvatski skup kemičara i kemijskih inženjera s međunarodnim sudjelovanjem ; 3. simpozij Vladimir Prelog : knjiga sažetaka = 25th Croatian Meeting of Chemist and Chemical Engineers with international participation. 3rd symposium “Vladimir Prelog” : Book of Abstracts / Šantić, Ana ; Đaković, Marijana - Zagreb : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI) ; Hrvatsko kemijsko drustvo, 2017, 262-262

ISBN
978-953-552327-7

Skup
25. Hrvatski skup kemičara i kemijskih inženjera s međunarodnim sudjelovanjem ; 3. simpozij Vladimir Prelog = 25th Croatian Meeting of Chemist and Chemical Engineers with international participation. 3rd symposium “Vladimir Prelog”

Mjesto i datum
Poreč, Hrvatska, 19.04.2017. - 22.04.2017

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
benzimidazoles ; Schiff bases ; chemosensors ; pH sensors

Sažetak
Intramolecular charge-transfer (ICT) organic systems based on electron donor-π-electron acceptor structures (D-π-A) are widely used as fluorescent chemosensors. Benzimidazole moiety is an attractive building block of such molecular structures due to multifunctionality of its heteroaromatic conjugated planar structure. Schiff bases are one of the most investigated classes of organic compounds as a result of their excellent chelating ability. They are frequently described as optical chemical sensors [1] or chemodosimeters [2] due to their desirable optical properties, where benzimidazole is often incorporated as a functional or electron accepting unit in a respective D-π-A system [3]. Benzimidazole based Schiff bases exhibit structural similarity with biomolecules which offers an interesting platform for development of novel optically responsive sensor molecules. The interactions of benzimdazole based Schiff bases 1-3 with different metal ions and effects of solvents and pH on their response have been studied by absorption and fluorescence spectroscopies. Basic photophysical properties are described in different solvents. Schiff bases exhibited naked-eye visible colour change upon protonation and pKa values around 4. The pKa is significantly increased upon immobilisation in bulk membrane (apparent pKa = 6.7). All compounds indicated good sensing properties for metal ions. Compound 2 is presented as colourimetric sensor for Al3+ and fluorimetric sensor for Cu2+ (Fig 1.) ion.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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