Supported bimetallic polymers of porphyrins as new heterogeneous catalyst

Carballo, Romina; Orto, V. Campodall’; Rezzano, Irene

doi:10.1016/j.molcata.2007.10.035

Cited by 21 publications

(7 citation statements)

References 16 publications

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“…These devices showed a significantly high peroxidase activity at À 200 mV vs. Ag/AgCl, [10,11] which was in line with the synergistic catalytic effect observed in hetero-bimetallic systems [12].…”

Section: Introductionsupporting

confidence: 77%

Electrocatalytic Reduction of Hydrogen Peroxide by Nanostructured Bimetallic Films of Metalloporphyrins

Hamer¹,

Carballo²,

Rezzano³

2009

Electroanalysis

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We report the sequential electrochemical deposition of bimetallic films of porphyrins onto gold nanoparticles, previously deposited by SAM on gold surface. SEM analysis of EAu/polyFeCuPP and EAu/cys/AuNp/polyFeCuPP showed a heterogeneous distribution of material aggregates in the former (ca. 0.1 -1 mm), whereas the nanocomposite film exhibits a highly microporous structure in the micrometer diameter range. The sensitivity for H 2 O 2 detection increased four times (609 AE 6 mA M À1 cm À2 vs. 157 AE 3 mA M À1 cm À2) with a linear relationship in the range of 1 Â 10 À5 -2 Â 10 À3 M. The application of the particulate material to the first-generation biosensor of glucose is described.

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Section: Introductionsupporting

confidence: 77%

Electrocatalytic Reduction of Hydrogen Peroxide by Nanostructured Bimetallic Films of Metalloporphyrins

Hamer¹,

Carballo²,

Rezzano³

2009

Electroanalysis

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“…The reaction was monitored spectrophotometrically in the presence of excess of 4-aminoantipyrine (4-AAP), by following the absorbance increase at 498 nm due to the formation of the p-quinoneimide (p-QI) adduct (ɛ = 7290 M À 1 cm À 1 ). [63] As evident from Figure 10a, at pH 7, the complex catalyzes the H 2 O 2 oxidation of phenol to the quinone, at 25 °C. In these conditions, the uncatalyzed oxidation of phenol by H 2 O 2 is much slower, as shown in the inset of Figure 10a.…”

Section: Oxidation Of Phenol By H 2 O 2 Catalyzed By [Cu(py 2 Pn)] 2 +mentioning

confidence: 96%

Versatile Activity of a Copper(II) Complex Bearing a N₄‐Tetradentate Schiff Base Ligand with Reduced Oxygen Species

et al. 2022

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The reactivity of the Cu(II) complex of N,N'-bis(pyridin-2-ylmethylene)propane-1,3-diamine (py 2 pn), [Cu(py 2 pn)(ClO 4 ) 2 ], toward O 2and H 2 O 2 has been examined. The complex reacts with O 2 *À with fast second order kinetics, k McF = 4.05 × 10 6 M À 1 s À 1 , employing the Cu(II)/Cu(I) couple proved by spectroscopic detection of the reduced form at low temperature. At À 40 °C in DMF, the reaction of the complex with H 2 O 2 /Et 3 N yields an stable end-on Cu(II)-hydroperoxide, with k OOH = 0.31 min À 1 , the formation of which has been established by DFT calculations, electronic and EPR spectra. At room temperature, the end-on Cu(II)-hydroperoxide reacts with a second Cu(II) complex to evolve O 2 , with k CAT = 83.2 M À 2 s À 1 . The Cu(II)-hydroperoxide can mediate phenol oxidation, probably through a trigonal bipyramidal ternary transition state based on DFT analysis, favored over catalase activity when low proportion of catalyst is used. In these reactions, structural constraints imposed by the ligand distort the coordination geometry of the metal and controls reactivity.

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“…Accordingly, they can be good candidates for different applications containing adsorption and sensing, gas separation, drug delivery, and photocatalysis [20,[23][24][25][26][27][28][29][30][31][32][33][34][35][36][37]. MOFs with two or more metals in their structure provide opportunities in terms of multifunctionality for many applications [23,[38][39][40][41][42][43][44][45][46][47]. Due to the synergistic effects, mixed metal-MOFs can exhibit better performance in various applications compared to single-metal MOFs particularly in heterogeneous catalysis [45,[48][49][50][51][52][53][54][55][56][57].…”

Section: Introductionmentioning

confidence: 99%

Porphyrin based Ni/Co metal-organic framework: Preparation, characterization and photodegradation of 1,5-dihydroxynaphthalene

Bokaei

Rahim

Rabbani

2023

Preprint

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In this study, mixed-metal metal-organic frameworks (MM-MOFs) containing metal-based porphyrin moieties will be synthesized and characterized. Then, efficiency of MOFs with Co and Ni alone and Co/Ni together in the different molar ratios as nodes with Mn-TCPP and H2TCPP as a linker in the structure of bimetallic-MOFs were investigated for photodegradation of DHN to Juglone. Also, different effecting factors on photocatalytic activity containing solvent, oxidant, time, and type of lamp, were further optimized for the best MM-MOF. According to the results, Ni50%/Co50% TCPP-Mn with the molar ratio of 1:1 of Ni:Co shows the highest efficiency in the photocatalytic process which was up to 66.3% under xenon lamp irradiation with blowing of O2 as the source of oxidant. Therefore, the presence both of nickel and cobalt in the structure led to a synergistic effect in enhancement of photocatalytic activity application.

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Supported bimetallic polymers of porphyrins as new heterogeneous catalyst

Cited by 21 publications

References 16 publications

Electrocatalytic Reduction of Hydrogen Peroxide by Nanostructured Bimetallic Films of Metalloporphyrins

Electrocatalytic Reduction of Hydrogen Peroxide by Nanostructured Bimetallic Films of Metalloporphyrins

Versatile Activity of a Copper(II) Complex Bearing a N₄‐Tetradentate Schiff Base Ligand with Reduced Oxygen Species

Porphyrin based Ni/Co metal-organic framework: Preparation, characterization and photodegradation of 1,5-dihydroxynaphthalene

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Supported bimetallic polymers of porphyrins as new heterogeneous catalyst

Cited by 21 publications

References 16 publications

Electrocatalytic Reduction of Hydrogen Peroxide by Nanostructured Bimetallic Films of Metalloporphyrins

Electrocatalytic Reduction of Hydrogen Peroxide by Nanostructured Bimetallic Films of Metalloporphyrins

Versatile Activity of a Copper(II) Complex Bearing a N4‐Tetradentate Schiff Base Ligand with Reduced Oxygen Species

Porphyrin based Ni/Co metal-organic framework: Preparation, characterization and photodegradation of 1,5-dihydroxynaphthalene

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Versatile Activity of a Copper(II) Complex Bearing a N₄‐Tetradentate Schiff Base Ligand with Reduced Oxygen Species