Porphyrin Adsorption by Clay Minerals

Kosiur, David R.

doi:10.1346/ccmn.1977.0250503

Cited by 24 publications

(14 citation statements)

References 28 publications

(21 reference statements)

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“…Porphyrin molecules, especially the water-soluble derivatives, have a high affinity to be adsorbed in the layered structure of kaolinite. 41 For separation, we stirred the synthesis product mixture with kaolinite in acidic conditions, which promotes the sorption of porphyrin ( Figure 2 a). Then, we sedimented the kaolinite particles by centrifugation: the porphyrin partitioned in the kaolinite sediment, while the CDs remained in solution.…”

Section: Resultsmentioning

confidence: 99%

Dual Fluorescence in Glutathione-Derived Carbon Dots Revisited

et al. 2022

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Dual-fluorescence carbon dots have great potential as nanosensors in life and materials sciences. Such carbon dots can be obtained via a solvothermal synthesis route with glutathione and formamide. In this work, we show that the dual-fluorescence emission of the synthesis products does not originate from a single carbon dot emitter, but rather from a mixture of physically separate compounds. We characterized the synthesis products with UV–vis, Raman, infrared, and fluorescence spectroscopy, and identified blue-emissive carbon dots and red-emissive porphyrin. We demonstrate an easy way to separate the two compounds without the need for time-consuming dialysis. Understanding the nature of the system, we can now steer the synthesis toward the desired product, which paves the way for a cheap and environmentally friendly synthesis route toward carbon dots, water-soluble porphyrin, and mixed systems.

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Section: Resultsmentioning

confidence: 99%

Dual Fluorescence in Glutathione-Derived Carbon Dots Revisited

et al. 2022

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“…Recently, there has been much interest in the immobilization of porphyrins, phthalocyanines and their metallo derivatives on inorganic supports. A large number of mineral structures including layered double hydroxides, − clays, ,,− zeolites, , layered phosphates and phosphonates, , and silica and alumina 19-21 have been involved.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Hybrid Organo−Mineral Materials: Anionic Tetraphenylporphyrins in Layered Double Hydroxides

Bonnet¹,

Forano²,

Roy³

et al. 1996

Chem. Mater.

135

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meso-Tetrakis(p-carboxyphenyl)porphyrin (pTCPP), the atropoisomer (RRRR) of mesotetrakis(o-carboxyphenyl)porphyrin (oTCPP), and the ammonium salt of the meso-tetrakis-(p-sulfonatophenyl)porphyrin (noted pTSPP) were intercalated into [Zn-Al] layered double hydroxide (LDH) using different preparative methods. Coprecipitation at constant pH in a porphyrinic solution of zinc and aluminum salts or anionic exchange of pTCPP on a [Zn-Al-Cl] precursor led to pure LDH phases, while products obtained from the calcinationreconstruction method on a [Zn-Al-Cl] precursor contain a significant amount of ZnO. Powder X-ray diffraction and UV-visible diffuse reflectance spectroscopy of LDH intercalated with pTCPP, oTCPP, and pTSPP show complete intercalation. Interlayer spacing ranging from 18.54 Å for [Zn-Al-oTCPP] to 22.91 Å for [Zn-Al-pTSPP] and 22.73 Å for [Zn-Al-pTCPP], determined from PXRD patterns, reveal different orientations of the anionic macrocyles between the hyroxylated layers. This selective arrangement is discussed in terms of layer charge density, isomeric substitution of the anionic groups on the meso tetraphenylporphyrins, and guest molecules and host matrix interactions.

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“…The interaction of porphyrins with clays has been widely studied since the late 1970's [12][13][14][15][16]. The presence of porphyrins is evidence for the biological source of petroleum.…”

Section: Introductionmentioning

confidence: 99%

“…The presence of porphyrins is evidence for the biological source of petroleum. Porphyrins exist in both animals and plants tissue [15]. When porphyrins are adsorbed on clay saturated with metal cations in the exchange sites, metalloporphyrin complexes form [16].…”

Section: Introductionmentioning

confidence: 99%

Montmorillonite Surface as a Catalyst for the Formation of Sat Metal Tetra (P-Sulphophenyl) Porphyrins

Hassen

Silver

2020

Jurnal Teknologi

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The adsorption of the water-soluble tetra(p-sulphophenyl)porphyrin (TPPS) compound on Fe(II), Fe(III), Cu(II), Co(II), Ni(II), Zn(II), Cd(II), Sn(IV) and UO22+ metal ion-exchanged montmorillonite (MMT) facilitated the formation of the SAT metal-TPPS MMT complexes of these cations (where SAT indicates sitting atop, ie the metal is above the porphyrin plane and is bound to external ligands in this case the MMT surface). All the resulting powder samples have a brown-orange colour due to the presence of the metal-TPPS-MMT complexes of these cations. Heating the solid powder samples caused demetallation and changed the colour of the powder from brown-orange colour of the metal-TPPS-MMT complex to the green colour of the diacid porphyrin on the clay. When such samples were exposed to the open atmosphere where they could absorb water vapour, the brown-orange colour appeared again due to the remetallation. The cation remained in the vicinity of the TPPS molecule upon demetallation, which makes the metallation-demetallation process reversible. The TPPS has been found to be adsorbed only on the external surface, and can be intercalated using sodium ions in solution with the compound to open the clay lattice. The reactions were monitored using visible absorption spectra, diffuse reflectance spectra, Mössbauer spectroscopy and X-ray diffraction.

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Porphyrin Adsorption by Clay Minerals

Cited by 24 publications

References 28 publications

Dual Fluorescence in Glutathione-Derived Carbon Dots Revisited

Dual Fluorescence in Glutathione-Derived Carbon Dots Revisited

Synthesis of Hybrid Organo−Mineral Materials: Anionic Tetraphenylporphyrins in Layered Double Hydroxides

Montmorillonite Surface as a Catalyst for the Formation of Sat Metal Tetra (P-Sulphophenyl) Porphyrins

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