FWF - Lumineszenz-Sensoren - Indicators for long-wave excitable luminescent sensors

Project: Research project

Project Details


The project is aimed to design luminescent sensors which can be interrogated with long-wave emitting light
sources. Most luminescent sensors described in the literature rely on indicators which are excitable in the blue and
green parts of the spectrum ( greater 550 nm) or even require excitation with the UV light. The established systems
used for practical applications also make use of such indicators. It is well known that short-waved excitation is
accompanied by many practical difficulties which become increasingly pronounced with decreasing of the
excitation wavelength. Those include interferences from the probed medium such inner filter effect,
autofluorescence and light straying. Instrumental aspects should also be considered. Cheap and high qualitative
optical and optoelectronic components are mostly available for the wavelength > 600 nm. Long-wave excitable
sensors are thus highly advantageous; their successful development is however hindered by lack of indicators with
desirable properties.
The long-wave excitable state-of-the-art indicators do not fully meet the requirements for their application in
luminescent sensors (such as brightness, photostability, solubility, sensitivity and suitability for immobilization).
The project is focused on synthesis and characterization of novel long-wave excitable luminescent indicators with
defined properties. These should be used to design sensors for dissolved oxygen, pH, as well as acidic and basic
gases, which is the aim of the second part of the project. The new materials will make possible to extend the optical
sensing technology to so far not realizable applications (such as subcutaneous sensing of the analytes), but also to
increase the reliability of the established methods.
Effective start/end date1/02/0921/12/12