Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2020 Apr 24;5(4):1020-1027.
doi: 10.1021/acssensors.9b02512. Epub 2020 Apr 8.

TADF-Emitting Zn(II)-Benzoporphyrin: An Indicator for Simultaneous Sensing of Oxygen and Temperature

Silvia E Zieger  1   2 , Andreas Steinegger  1 , Ingo Klimant  1 , Sergey M Borisov  1
Affiliations

TADF-Emitting Zn(II)-Benzoporphyrin: An Indicator for Simultaneous Sensing of Oxygen and Temperature

Silvia E Zieger et al. ACS Sens. .

Abstract

A new luminescent indicator is presented that enables simultaneous measurement of oxygen and temperature at a single wavelength. The indicator, an alkylsulfone-substituted Zn(II)-meso-tetraphenyltetrabenzoporphyrin, emits prompt and thermally activated delayed fluorescence (TADF). TADF is sensitive toward oxygen and temperature and is referenced against prompt fluorescence (PF) that is not affected by oxygen. The information on both parameters is accessed from the decay time of TADF and the temperature-dependent ratio of TADF and PF. Sensor foils, made from poly(styrene-co-acrylonitrile) and the indicator dye, enable temperature-compensated trace oxygen sensing (0.002-6 hPa pO2) at ambient conditions. Compared to the previously reported dual sensors based on two emitters, the new sensor significantly simplifies the experimental setup and eliminates risks of different leaching or photobleaching rates by utilizing only one indicator dye and operating at a single wavelength.

Keywords: dual sensor; fluorescence; molecular thermometer; optical oxygen sensing; temperature compensation.

PubMed Disclaimer

Conflict of interest statement

The authors declare no competing financial interest.

Figures

Figure 1
Figure 1
Chemical structure of Zn-OS.
Figure 2
Figure 2
Absorption (solid black line) and emission (dashed blue line) spectra of Zn-OS in toluene at 25 °C.
Figure 3
Figure 3
Response of the apparent luminescence decay time τ (A,B) and the intensity ratio (IDF/PF) (C,D) for the dual sensor to temperature (A,C) and oxygen (B,D). The response is exemplified for two different temperatures and oxygen partial pressures. The fit (indicated by dash-dot lines) is performed according to eqs 3 and 4.
Figure 4
Figure 4
Luminescence response of the Zn-OS/PSAN material to temperature and oxygen and illustration of the data analysis using analytical geometry. (A,B) Calibration planes (colored surfaces representing the mean values at each point) for the apparent luminescence decay time and the intensity ratio (delayed IDF vs prompt IPF luminescence). Horizontal gray planes exemplify the τ and IDF/PF obtained at given conditions. Curves resulting from the intersection of the calibration planes and horizontal gray planes are shown in yellow color. (C) Intersection curves (A,B) with the intercept point indicating the unique pair of temperature and pO2 values.
See this image and copyright information in PMC

References

    1. Borisov S. M.; Vasylevska A. S.; Krause C.; Wolfbeis O. S. Composite Luminescent Material for Dual Sensing of Oxygen and Temperature. Adv. Funct. Mater. 2006, 16, 1536–1542. 10.1002/adfm.200500778. - DOI
    1. Zelelow B.; Khalil G. E.; Phelan G.; Carlson B.; Gouterman M.; Callis J. B.; Dalton L. R. Dual Luminophor Pressure Sensitive Paint. Sens. Actuators, B 2003, 96, 304–314. 10.1016/S0925-4005(03)00547-1. - DOI
    1. Sung T.-W.; Lo Y.-L. Dual Sensing of Temperature and Oxygen Using PtTFPP-Doped CdSe/SiO2 Core–Shell Nanoparticles. Sens. Actuators, B 2012, 173, 406–413. 10.1016/j.snb.2012.07.028. - DOI
    1. Stich M. I. J.; Nagl S.; Wolfbeis O. S.; Henne U.; Schaeferling M. A Dual Luminescent Sensor Material for Simultaneous Imaging of Pressure and Temperature on Surfaces. Adv. Funct. Mater. 2008, 18, 1399–1406. 10.1002/adfm.200701199. - DOI
    1. Köse M. E.; Carroll B. F.; Schanze K. S. Preparation and Spectroscopic Properties of Multiluminophore Luminescent Oxygen and Temperature Sensor Films. Langmuir 2005, 21, 9121–9129. 10.1021/la050997p. - DOI - PubMed

Publication types