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Rational design of nanoptodes architecture – Towards multifunctional sensors
- Stelmach, Emilia, Kłucińska, Katarzyna, Maksymiuk, Krzysztof, Michalska, Agata
- Talanta 2019 v.196 pp. 226-230
- cations, deprotonation, dyes, hydrogen ions
- Liposome type nano-optodes are reported. Probe architecture allows tailored – yet spontaneous – positioning of the reporter dye with chromophore group facing the sample solution. As a result the emission signal – related to competition between analyte cations and hydrogen ions, ultimately leading to deprotonation of chromoionophore and emission increase – can be read instantly after contact of the sensor with sample but also allows observation of optical signal in unique for these sensors days’ time scale, without loss of intensity. Possibility of optode signal observation in days’ time scale allows exploration of solvatochromic properties of applied chromoionophore group and estimation of sensor sample contact time as minute change in the position of chromophore group emission maximum.