Pregled bibliografske jedinice broj: 271901
PH optical sensors based on sol-gels: Chemical doping versus covalent immobilization
pH optical sensors based on sol-gels: Chemical doping versus covalent immobilization // Analytica Chimica Acta, 367 (1998), 1-3; 159-165 (međunarodna recenzija, članak, znanstveni)
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Naslov
PH optical sensors based on sol-gels: Chemical doping versus covalent immobilization
Autori
Lobnik, A. ; Oehme, I. ; Murković, Ivana ; Wolfbeis, O.S.
Izvornik
Analytica Chimica Acta (0003-2670) 367
(1998), 1-3;
159-165
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
optical sensors; aminofluorescein; pH; sol-gel; covalent immobilization; ormosil
Sažetak
PH sensitive fluorescent sol-gels were obtained by both covalent immobilization of aminofluorescein (AF) via isocyanate or epoxy groups, and by co-condensation of tetramethoxysilane (TMOS) and phenyltrimethoxysilane (Ph-TriMOS) in the presence of AE The gel precursors were deposited on glass supports, cured, and characterized in terms of response to pH, pK(a) values, effects of ionic strength, response time, leaching, long-term stability, and photostability. The addition of Ph-TriMOS is found to exhibit a pronounced effect on the performance of the materials. Sensor layers based on TMOS doped with AF were found to be most appropriate for purposes of sensing pH in giving large relative signal changes and displaying rapid response times over the pH range 4-9.
Izvorni jezik
Engleski
Znanstvena područja
Kemija
POVEZANOST RADA
Ustanove:
Fakultet kemijskog inženjerstva i tehnologije, Zagreb
Profili:
Ivana Steinberg
(autor)
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
