Improvement of the O-2 detection: substituent's effect on Pd(II) meso-tetraphenylporphyrin probes

Ongun, Merve Zeyrek and Topal, Sevinç Zehra and Yel, Zübeyde and Ertekin, Kadriye and Önal, Emel and Hirel Aslan, Catherine (2019) Improvement of the O-2 detection: substituent's effect on Pd(II) meso-tetraphenylporphyrin probes. Sensors and Actuators B: Chemical, 288 . pp. 316-324. ISSN 0925-4005

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Luminescence-based sensors are among the most promising tools for detection of oxygen gas. Improving the performance of such sensors is still an issue that requires an optimization of its composition which includes an oxygen sensitive probe embedded in a polymeric matrix with or without additives. Our approach is based on design of oxygen sensitive probes and aims at understanding the relationship between the structural variation of the probe and its oxygen sensing ability. In this context, our choice focuses on a non-symmetric palladium meso-tetraphenylporphyrin bearing three electron donor hexyloxy (-OC6H13) and one electron withdrawing phenylacetylide substituents (3-Pd). Poly (trimethylsilyl propyne) [poly(TMSP)] was privileged as polymeric matrix material due to is high oxygen permeability, also silver nanoparticles (AgNPs) were added to magnify the sensor sensitivity. The AgNP supported 3-Pd-doped poly(TMSP) microfiber [AgNP-(3-Pd)MF] in its optimal composition shows an exceptional intensity ratio value I-0/I-100 = 335, a high Stern-Volmer constant (K-SV = 6.4274%(-1)), a short response time (2 s), and quite low limit of detection (4.66 x 10(-4)%(-1)).
Item Type: Article
Uncontrolled Keywords: Oxygen sensor; Phosphorescence; Palladium meso-tetraphenylporphyrins; Microfibers; Poly(1-trimethylsilyl-1-propyne); Silver nanoparticles (AgNPs)
Divisions: Sabancı University Nanotechnology Research and Application Center
Depositing User: Catherine Hirel Aslan
Date Deposited: 10 May 2019 11:25
Last Modified: 31 Jul 2023 13:37

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