Ratiometric Sensor Based on PtOEP-C6/Poly (St-TFEMA) Film for Automatic Dissolved Oxygen Content Detection

A ratiometric oxygen sensor based on a platinum octaethylporphyrin (PtOEP)–coumarin 6 (C6)/poly (styrene-trifluoroethyl methacrylate) (poly (St-TFEMA)) film was developed for automatic dissolved oxygen (DO) detection. The oxygen-sensing film according to the dynamic quenching mechanism was prepared by embedding platinum octaethylporphyrin (PtOEP) and coumarin 6 (C6) in poly (styrene-trifluoroethyl methacrylate) (poly (St-TFEMA)). The optical parameter (OP) was defined as the ratio of the oxygen-insensitive fluorescence from C6 to the oxygen-sensitive phosphorescence from PtOEP. A calibration equation expressing the correlation between the OP values and DO content described by a linear function was obtained. A program based on the Labview software was developed for monitoring the real-time DO content automatically. The influence of the excitation intensity and fluctuation on the OP values and the direct luminescence signal (integration areas) was compared, verifying the strong anti-interference ability of the sensor. The detection limit of the sensor was determined to be 0.10 (1) mg/L. The switching response time and recovery time of the sensor were 0.4 and 1.3 s, respectively. Finally, the oxygen sensor was applied to the investigation of the kinetic process of the DO content variation, which revealed an exponential relationship with time.

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Dissolved oxygen sensor based on fluorescence quenching of oxygen-sensitive ruthenium complex immobilized on silica–Ni–P composite coating

Sensors and Actuators B Chemical ◽

10.1016/j.snb.2005.11.044 ◽

2006 ◽

Vol 117 (1) ◽

pp. 172-176 ◽

Cited By ~ 28

Author(s):

Xiaoli Xiong ◽

Dan Xiao ◽

Martin. M.F. Choi

Keyword(s):

Fluorescence Quenching ◽

Dissolved Oxygen ◽

Composite Coating ◽

Oxygen Sensor ◽

Ruthenium Complex ◽

Oxygen Sensitive

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Dissolved oxygen sensor based on fluorescence quenching of oxygen-sensitive ruthenium complexes immobilized in sol–gel-derived porous silica coatings

The Analyst ◽

10.1039/an9962100785 ◽

1996 ◽

Vol 121 (6) ◽

pp. 785-788 ◽

Cited By ~ 114

Author(s):

Aisling K. McEvoy ◽

Colette M. McDonagh ◽

Brian D. MacCraith

Keyword(s):

Fluorescence Quenching ◽

Dissolved Oxygen ◽

Oxygen Sensor ◽

Sol Gel ◽

Porous Silica ◽

Ruthenium Complexes ◽

Silica Coatings ◽

Oxygen Sensitive

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Characterization and Correction of Temperature Effects on Ru(bpy)32+ Fluorescence Films Used in Dissolved Oxygen Sensor

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.875-877.567 ◽

2014 ◽

Vol 875-877 ◽

pp. 567-573

Author(s):

Xian De Zhao ◽

Wen Gang Zheng ◽

Da Ming Dong ◽

Shi Rui Zhang ◽

Lei Zi Jiao

Keyword(s):

Dissolved Oxygen ◽

Temperature Effect ◽

Fluorescence Intensity ◽

Oxygen Sensor ◽

Sodium Sulfite ◽

Correction Coefficient ◽

Sensitive Film ◽

Different Temperatures ◽

Oxygen Sensitive ◽

Sensitive Membrane

The spectral characteristic of the fluorescence film used in dissolved oxygen sensor is influenced by temperature. In this paper, we quantitatively studied the temperature effect of the dissolved oxygen sensitive film based on Ru (bpy)32+complexes. In order to study how it was affected, two experiments were designed. One experiment was carried out when the sensitive membrane was dipped into solution of saturated sodium sulfite, in which case, there was no oxygen interference. The other experiment was implemented when the sensitive film was exposed to air, while the influence of oxygen was constant. In the processes of both experiments, we adjusted the temperature around the sensitive membrane. When the temperature rising from 0°C to 45°C, the fluorescence intensity emitted from the sensitive film was reduced which in the first experiment decreased from 5030counts to 3845counts and in the second experiment from 2314counts to 1407counts. Then a method can correct the temperature effect was proposed. The curve of spectrum at 25°C was supposed to be the standard and spectrums at other temperatures was corrected to be consistent with it. The correction coefficient of every wavelength was got through our calculation. After multiplying the coefficients, fluorescence intensity at different temperatures was approximately equal and the differences caused by temperature were eliminated.

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