Optical and electrochemical behavior of new nano-sized complexes based on gold-colloid and Co-porphyrin derivative in the presence of H 2 O 2

Fagadar‐Cosma, Eugenia; Sebarchievici, Iuliana; Lascu, Anca; Creanga, Ionela; Palade, Anca; Bîrdeanu, Mihaela; Țăranu, Bogdan-Ovidiu; Făgădar-Cosma, Gheorghe

doi:10.1016/j.jallcom.2016.06.246

Cited by 24 publications

(26 citation statements)

References 37 publications

(35 reference statements)

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“…e FT-IR, Raman, UV-Vis, and fluorescence spectroscopic data and AFM, SEM, TEM, and electrochemical characterizations of MnTTPCl were reported in already published papers [35] together with some specific characterizations for sensing applications of diclofenac, H 2 O 2 , and NO 2 gas [32,36]; β-carotene was purchased from Merck, and the gold colloid was synthesized according to recent literature data [37] and already characterized by UV-Vis, AFM, TEM, and STEM [31,38].…”

Section: Methodsmentioning

confidence: 99%

“…Based on our previous experience concerning the sensing capacity of hybrid nanomaterials formed between porphyrins and nanosized noble metals [30][31][32], the present work focuses on obtaining and investigating the hybrid (MnTTPCl/n-Au) UV-Vis response toward β-carotene in ethanol solutions ( Figure 1). A comparative study of the optical detecting capacity of this hybrid's components including chloro [5,10,15,20-tetrakis-(4-methylphenyl)porphyrinato manganese (III)] (MnTTPCl) and bare gold nanoparticles (n-Au) was also performed.…”

Section: Introductionmentioning

confidence: 99%

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Hybrid Mn-Porphyrin-Nanogold Nanomaterial Applied for the Spectrophotometric Detection ofβ-Carotene

Lascu

Bîrdeanu

Țăranu

et al. 2018

Journal of Chemistry

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A hybrid formed between Mn(III) tetratolyl-porphyrin chloride (MnTTPCl) and spherical gold colloid (n-Au), MnTTPCl/n-Au, was tested along with its component nanomaterials as promising candidates in the detection of β-carotene from ethanol solutions. Among the investigated nanomaterials, the largest β-carotene concentration interval detectable by UV-Vis spectrophotometry (9.80 × 10 −6 M-1.15 × 10 −4 M) was obtained when using the MnTTPCl/n-Au hybrid. is hybrid material gives rise to the widest absorption band, covering the range of 425 nm to 581 nm after treatment with β-carotene.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hybrid Mn-Porphyrin-Nanogold Nanomaterial Applied for the Spectrophotometric Detection ofβ-Carotene

Lascu

Bîrdeanu

Țăranu

et al. 2018

Journal of Chemistry

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“…Due to their ability to form amazing π-conjugated structures and to extend their aromaticity by tautomeric equilibria, porphyrins and metalloporphyrins deposited on various substrates are used for detection of either metal ions [7,8], anions [9,10,11], or gases [12,13] including molecular oxygen [14,15,16]. In the last decade, extensive ring fusion has become a novel target and Möbius aromatic molecules were reported [17] to be spontaneously generated.…”

Section: Introductionmentioning

confidence: 99%

Trace Oxygen Sensitive Material Based on Two Porphyrin Derivatives in a Heterodimeric Complex

et al. 2017

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The successful preparation of a novel dimer complex formed between 5,10,15,20-tetrakis(3,4-dimethoxyphenyl)-porphyrin Fe(III) chloride and (5,10,15,20-tetraphenylporphinato) dichlorophosphorus(V) chloride using the well-known reactivity of the P–X bond is reported. The obtained complex was characterized by UV-vis, Fourier transform infrared spectroscopy (FT-IR), fluorescence, 1H-NMR, 13C-NMR, and 31P-NMR spectroscopic techniques and also by additional Heteronuclear Single Quantum Coherence (HSQC) and Heteronuclear Multiple Bond Correlation (HMBC) experiments in order to correctly assign the NMR signals. Scanning electron microscopy (SEM) and EDX quantifications completed the characterizations. This novel porphyrin dimer complex demonstrated fluorescence sensing of H2O2 in water for low oxygen concentrations in the range of 40–90 µM proving medical relevance for early diagnosis of diseases such as Alzheimer’s, Parkinson’s, Huntington’s, and even cancer because higher concentrations of H2O2 than 50 μM are consideredcytotoxic for life. Due to its optical properties, this novel metalloporphyrin–porphyrin based complex is expected to show PDT and bactericidal activity under visible-light irradiation.

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“…Few years later, electrodes prepared with membrane containing Pt(II)-tetraphenylporphyrin responded to iodide with the Nernstian slope of 58.8 mV per decade, in 10 −5 to 10 −2 M iodide activity range. The same study revealed that Pt(II)-octaethylporphyrin exhibits enhanced selectivity for iodide-ion recognition than Pt(II)-tetraphenylporphyrin [15].In the last decade, our team demonstrated expertise in optical [16], fluorescent [17,18] and electrochemical [19,20] detection of minute concentrations of hydrogen peroxide, in a range that is highly relevant for medical tests, using as sensitive materials Mn(III)-and Co(II)-metalloporphyrinates. Our next approach was to synthesize and test the sensitivity toward H 2 O 2 of other metalloporphyrin structures, especially Pt-derivatives, for improving selectivity, sensitivity, and the detection concentration domain, preserving high accuracy.The main purpose of this work was to synthesize a novel fluorescent Pt-metalloporphyrin with the capability of recognizing and monitoring ROS species, especially H 2 O 2 .…”

mentioning

confidence: 96%

“…In the last decade, our team demonstrated expertise in optical [16], fluorescent [17,18] and electrochemical [19,20] detection of minute concentrations of hydrogen peroxide, in a range that is highly relevant for medical tests, using as sensitive materials Mn(III)-and Co(II)-metalloporphyrinates. Our next approach was to synthesize and test the sensitivity toward H 2 O 2 of other metalloporphyrin structures, especially Pt-derivatives, for improving selectivity, sensitivity, and the detection concentration domain, preserving high accuracy.…”

mentioning

confidence: 99%

Novel Platinum-Porphyrin as Sensing Compound for Efficient Fluorescent and Electrochemical Detection of H2O2

et al. 2020

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Metalloporphyrins are highly recognized for their capacity to act as sensitive substances used in formulation of optical, fluorescent, and electrochemical sensors. A novel compound, namely Pt(II)-5,10,15,20-tetra-(4-allyloxy-phenyl) porphyrin, was synthesized by metalation with PtCl2(PhCN)2 of the corresponding porphyrin base and was fully characterized by UV-vis, fluorimetry, FT-IR, 1H-NMR, and 13C-NMR methods. The fluorescence response of this Pt-porphyrin in the presence of different concentrations of hydrogen peroxide was investigated. Besides, modified glassy carbon electrodes with this Pt-porphyrin (Pt-Porf-GCE) were realized and several electrochemical characterizations were comparatively performed with bare glassy carbon electrodes (GCE), in the absence or presence of hydrogen peroxide. The Pt-porphyrin demonstrated to be a successful sensitive material for the detection of hydrogen peroxide both by fluorimetric method in a concentration range relevant for biological samples (1.05–3.9 × 10−7 M) and by electrochemical method, in a larger concentration range from 1 × 10−6 M to 5 × 10−5 M. Based on different methods, this Pt-porphyrin can cover detection in diverse fields, from medical tests to food and agricultural monitoring, proving high accuracy (correlation coefficients over 99%) in both fluorimetric and electrochemical measurements.

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Optical and electrochemical behavior of new nano-sized complexes based on gold-colloid and Co-porphyrin derivative in the presence of H 2 O 2

Cited by 24 publications

References 37 publications

Hybrid Mn-Porphyrin-Nanogold Nanomaterial Applied for the Spectrophotometric Detection ofβ-Carotene

Hybrid Mn-Porphyrin-Nanogold Nanomaterial Applied for the Spectrophotometric Detection ofβ-Carotene

Trace Oxygen Sensitive Material Based on Two Porphyrin Derivatives in a Heterodimeric Complex

Novel Platinum-Porphyrin as Sensing Compound for Efficient Fluorescent and Electrochemical Detection of H2O2

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