Hyperporphyrin effect on oxygen sensitivity of free meso -tetraphenylporphyrins

Topal, Sevinç Zehra; Ongun, Merve Zeyrek; Önal, Emel; Ertekin, Kadriye; Hirel, Catherine

doi:10.1016/j.dyepig.2017.05.022

Cited by 12 publications

(6 citation statements)

References 19 publications

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“…In our previous works, we found that poly(TMSP) is an ideal polymeric matrix according to the optical transparency, high diffusibility toward oxygen, and stability. Therefore, poly(TMSP) was selected as a polymeric support material due to the high polymer permeability (oxygen permeability coefficient (L = 7700 cm 3 (STP) cm/cm 2 .s.cm Hg) and rapidly in contact with molecular oxygen (11,18). Also, we found in our previous work that the best ionic liquid additive is the [BMIM][BF4 -] in terms of compatibility and oxygen gas solubility in a polymeric matrix and providing long-term stability to the indicator dye doped-sensing slides (39).…”

Section: Preparation Of H2tpp-based Oxygen Sensing Slidesmentioning

confidence: 99%

Enhancement of the O2 Sensitivity: ZnO, CuO, and ZnO/CuO Hybrid Additives' Effect on Meso-Tetraphenylporphyrin Dye

Ongun

2022

Journal of the Turkish Chemical Society Section A: Chemistry

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Semiconductor metal oxide materials have attracted great interest in gas sensors due to their high sensitivity to many target gases. In this study, an oxygen-sensitive optical chemical sensor was prepared in thin-film form by immobilizing meso-tetraphenylporphyrin (H2TPP) in silicon matrix in the presence of ZnO, CuO and ZnO/CuO hybrid nanoparticles as additives. Characterization of synthesized metal oxide powders was performed using XPS, XRD, SEM, and PL spectroscopy. Emission and decay time measurements of H2TPP-based materials were investigated between the concentration range of 0% and 100% [O2] in thin-film forms. The intensity-based signal drops of the additive-free form of porphyrin dye toward oxygen were calculated as 70%. Whereas, the oxygen sensitivities of H 2TPP-based sensor slides were measured as 80%, 75%, and 88% in the presence of ZnO, CuO, and ZnO/CuO hybrid particles, respectively. The usage of porphyrin dye with ZnO/CuO hybrid additive provided higher oxygen sensitivity, larger linear response range, higher Stern-Volmer constant (KSV) value and faster response time compared to the undoped form, ZnO and CuO additive-doped forms of H2TPP. The response and the recovery times of the porphyrin-based sensing slide along with ZnO/CuO hybrid particles have been measured as 10 and 20 s. These results make the H2TPP along with the metal oxide additives promising candidates as oxygen probes.

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Section: Preparation Of H2tpp-based Oxygen Sensing Slidesmentioning

confidence: 99%

Enhancement of the O2 Sensitivity: ZnO, CuO, and ZnO/CuO Hybrid Additives' Effect on Meso-Tetraphenylporphyrin Dye

Ongun

2022

Journal of the Turkish Chemical Society Section A: Chemistry

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“…In our previous studies, we optimized the concentration of the PFC in the poly(TMSP) based composites [13]. Optimal quantity of the PFC in the cocktail composition was investigated by different amounts of the PFC in the polymeric matrix.…”

Section: Effect Of Pfc On Oxygen Sensitivitymentioning

confidence: 99%

“…S 2-4). The best sensitivity was obtained when 2.0 mg of PFC was utilized in the matrix [13]. On the other hand, the length of the alkyl chain on the imidazolium part is also important in the interaction of the additive with the matrix.…”

Section: Effect Of Pfc On Oxygen Sensitivitymentioning

confidence: 99%

Development of Highly Sensitive Metal-Free Tetraphenylporphyrin-Based Optical Oxygen Sensing Materials along with ILs and AgNPs

Ongun¹

2019

Celal Bayar Üniversitesi Fen Bilimleri Dergisi

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An oxygen sensitive optical chemical sensor has been developed based on fluorescence quenching of the meso-tetraphenylporphyrin (H2TPP) immobilized in a silicone derivative along with silver nanoparticles (AgNPs) and different ionic liquids (ILs). Emission spectra of the H2TTP doped thin film exhibited an increment due to the formation of an associated complex between H2TPP and AgNPs. The offered thin films responded to the oxygen in the direction of quenching with extreme sensitivity. Emission and decaytime measurements of the H2TPP in thin solid matrices were studied in the concentration range of 0-100% p(O2). Utilization of the porphyrin dye along with AgNPs and ionic liquid as an additive exhibited higher oxygen sensitivity with respect to the additive-free forms and resulted in many advances such as linear response, improvement in sensor dynamics and extreme sensitivity. Together with additives, the mesotetraphenylporphyrin-based composites yielded higher Stern-Volmer constant (Ksv), faster response time, and larger linear response range when compared with the additive-free form. The response time of the sensor has been recorded as 90 s.

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“…This is due to the unavailability of the porphyrin core (i.e., the amine and imine groups) for small molecule recognition and activation, as they are shielded by the surrounding macrocycle. While there are reports on the use of free base porphyrins for sensing of VOCs, 57 water and ethanol, 136 and gases 43,46,[137][138][139][140][141] based on optical changes resulting from alterations in the microenvironment of the porphyrin, only few cases invoke a specific tailoring of the porphyrin skeleton towards improved substrate binding, anion recognition, 142,143 pH sensing, 95,144,145 or chiral sensors. 146 Similar to sensing, catalysis requires binding of the substrate to the active center; thus, molecular engineering of the tetrapyrrole scaffold can be used to increase selectivity and sensitivity.…”

Section: Towards Distortion-dependent Free Base Porphyrin Sensorsmentioning

confidence: 99%

Porphyrins in troubled times: a spotlight on porphyrins and their metal complexes for explosives testing and CBRN defense

2018

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Hyperporphyrin effect on oxygen sensitivity of free meso -tetraphenylporphyrins

Cited by 12 publications

References 19 publications

Enhancement of the O2 Sensitivity: ZnO, CuO, and ZnO/CuO Hybrid Additives' Effect on Meso-Tetraphenylporphyrin Dye

Enhancement of the O2 Sensitivity: ZnO, CuO, and ZnO/CuO Hybrid Additives' Effect on Meso-Tetraphenylporphyrin Dye

Development of Highly Sensitive Metal-Free Tetraphenylporphyrin-Based Optical Oxygen Sensing Materials along with ILs and AgNPs

Porphyrins in troubled times: a spotlight on porphyrins and their metal complexes for explosives testing and CBRN defense

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