The Effect of Exchangeable Cations on the Sorption of Chlorophyllin By Montmorillonite

Kaufherr, N.

doi:10.1346/ccmn.1971.0190308

Cited by 12 publications

(2 citation statements)

References 5 publications

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“…Several earlier reports have indicated that porphyrins bind strongly to layered silicate surfaces. Model studies of the role of porphyrins in petroleum diagenesis have shown that various types of free base porphyrins can bind and undergo transalkylation reactions on montmorillonite under simulated geological conditions.3 Also, chlorophyllin has been found to bind to layered silicates, 4 and hemin has been intercalated as the hemin cation in montmorillonite. 5 The intercalation of metalloporphyrins in layered silicate structures could be of some interest for solid-state dioxygen binding and catalytic applications.…”

Section: Introductionmentioning

confidence: 99%

Porphyrin intercalation in mica-type silicates

Cady¹,

Pinnavaia²

1978

Inorg. Chem.

135

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m), 965 (m), 935 (w), 925 (w), 910 (w), 905 (w), 885 (m), 875 (w), 860 (w), 850 (s), 835 (s), 755 (w), 738 (m), 728 (m), 720 (m) cm-I.A yellow-brown band was eluted from the column in 60%CHzC12/hexane which upon rotary evaporation of solvent produced 60 mg (1.6%) of green-brown crystals of 111, (CSH5Fe)zC2B8H90H, mp >300 OC. Mass measurement calcd for 12C1z'H201'B856Fe2160+ 380.0957, found 380.0973; calcd for 12C1i13C'H~~'iB~57Fe2160+ 383.1000, found 383.1003. Infrared spectrum (NUJO~ mull): 3450 (w), 3090 (w), 2490 (vs), 1425 (m), 1415 (m), 1275 (m), 1150 (m), 1110 (s), 1070 (s), 1045 (w), 1020 (m), 1015 (m), 988 (m), 938 (w), 882 (m), 844 (s), 720 (w), 688 (m) cm-'.The silica gel was then extracted with CH3CN, yielding a deep green solution. Removal of CH3CN followed by addition of HzO, filtration, and addition of excess (CH3)4NC1 produced a green precipitate. The precipitate (150 mg) was dissolved in acetone and stripped onto silica gel and chromatographed on a 2 X 15 cm silica gel column. Elution with CH2C12 removed impurities while elution with 10% acetone/CH2Clz eluted the green band. Addition of 1propanol to the filtrate followed by slow rotary evaporation produced 84 mg (1.6%) of dark green crystals of 11, [(CH3)4N][C5HsFeC2-B9HIiFeC2B9fiil], mp >300 OC. (m), 995 (m), 977 (m), 950 (m), 883 (m), 860 (w), 840 (s), 760 (m), 740 (m), 724 (m) cm-I. Polyhedral Expansion of 1-(~s-C5H5)-1-Fe-2,3-CzB8Hlo. This reaction was performed as above with 0.98 g (4.06 mmol) of 1,-2,3-CSHSFeC2B8H10. To the reduced solution was added, as a solid, 6.5 g (19 mmol) of [CsH5FeC6H6][PF6]. The mixture was stirred 120 h under nitrogen and worked up as above. Elution of the chromatography column with hexane produced ferrocene, and elution with 20% CHzCl2-hexane yielded 60 mg of starting material. A red band eluted in CH2C12. Addition of a small amount of hexane followedInorganic Chemistry, Vol. 17, No. 6, 1978 1501 by rotary evaporation of the solvent produced 90 mg of red-purple crystals, mp >310 O C , whose mass and 'H NMR spectra were consistent with the formulation (CsH5Fe)2CZB8HI0. No 80.5-MHz "B NMR spectrum was observable for the paramagnetic species. The elemental analysis and magnetic susceptibility were close to that expected for CSH5FeC2B8Hlo, due presumably to solid-state decomposition.3, 291 (1973). (13) T. E. Paxson, M. K. Kaloustian, G. M. Tom, R.This paper reports the reactions of meso-tetraphenylporphyrin (TPPH2) with selected cations on the interlamellar surfaces of montmorillonite, a swelling layer lattice silicate related to mica. Strongly acidic hydrated Fe3+ and V 0 2 + ions react quantitatively with the free base porphyrin to afford the protonated porphyrin dication (TPPHZ+) in the form of intercalated monolayers. Monolayers of TPPH42+ are also formed by reaction of the free base porphyrin with hydronium ions on the silicate surfaces. Weakly acidic hydrated Na+ and Mg2+ on the surface-exchange sites afford only trace amounts of TPPHd2+.No porphyrin dication is formed with (n-C3H7)N+. Co2+, Cu2+, and Zn2+ reac...

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Section: Introductionmentioning

confidence: 99%

Porphyrin intercalation in mica-type silicates

Cady¹,

Pinnavaia²

1978

Inorg. Chem.

135

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“…As porfirinas são bem conhecidas por suas aplicações biológicas e catalíticas [25], e é de interesse a absorção e intercalação das porfirinas em lamelas [17]. Estudos da interação de lamelas com porfirinas foram motivados pela ocorrências de porfirinas em sedimentos e depósitos de petróleo [26,27].…”

Section: Porfirinasunclassified

Simulações computacionais de moléculas com aplicações em biociências

Suárez¹

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AgradecimentosOs meus sinceros agradecimentos À minha orientadora, Professora Helena Maria Petrilli, agradeço pela confiança depositada em mim, pela atenção e paciência que sempre teve e pelos sábios conselhos que com certeza vou levar comigo. À Prof. Dra. Lucy Vitória Credido Assali, Prof. Luis Gregório Dias e família pela ajuda em momentos delicados.Ao Prof. Dr. Breno Pannia Espósito, Prof. Vera R. Leopoldo Constantino e seu grupo de pesquisa do IQ, pela ajuda ao tratar e entender a Química envolvida neste presente trabalho. Agradecimentos especiais para o meus amigos Philippe Petersen, Arles Gil Rebaza e FilipeDalmatti por ter me ajudado muito para que este trabalho fosse realizado. A Sandra e Família, por serem pessoas muito boas e terem tido muita paciência comigo. À Rosana, pela sua calma e prontidão para resolver os problemas. À Adriana Rocio Cárdenas Arias, por seu amor e por ser a pessoa que mais me incentivou e me ajudou nos momentos difíceis.À meus pais René Diaz Barroso e Norma Suarez Cruz por ajudar a realizar meus sonhos. AbstractIn the present work we performed electronic structure calculations within the Kohn-Sham scheme of the density functional theory (DFT). We studied two molecules with potential applications in life sciences and medicine: ferrioxamine B and 5,10,15,23H (TMPyP) porphyrin. We used different methods and different exchange and correlation functionals, analyzing optical and vibrational properties and hyperfine interactions. In the case of ferrioxamine B, results in the crystalline phase (molecular crystal), and gas phase were compared with experimental results obtained using Mössbauer spectroscopy from the literature. We analyzed hyperfine parameters such as the electric quadrupole splitting, asymmetry parameter, hyperfine field and isomer shift. In the case of TMPyP porphyrin we analyzed vibrational properties in the gas phase and optical properties. For the electronic absorption, solvent effects and electronic charges states were analyzed. X XI

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Functionalizing Inorganic Solids: Towards Organic–Inorganic Nanostructured Materials for Intelligent and Bioinspired Systems

Ruiz-Hitzky

2003

The Chemical Record

128

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The design, preparation, and properties of organic-inorganic hybrid compounds are described and discussed with respect to their potential uses as intelligent and bioinspired materials. Several synthesis strategies based on intercalation in 2D solids, the grafting of organic groups onto silica and silicates, and the self-assembly of organo-silica materials are presented, focusing on the soft procedures that are used to modify the functionality of the inorganic substrates. The combination of both organic and inorganic moieties at the nanometer level forms the basis for preparing multifunctional solids that are provided with specific functions in response to different types of stimuli. In some cases these resemble materials that are found in biological systems. Examples include organic-inorganic membranes that are based on intercalated macrocyclic compounds and bi-layer vesicles that consist of alkyl long-chains arranged either in the confined region of layered silicates or as self-organized organo-silica micelles. The role of certain hybrid materials such as membranes provides a different approach to the development of artificial liposomes and other mimetic systems that have an organic-inorganic composition and nanostructural organization. Their potential uses for DDS or DNA-dense phases are also discussed and novel alternatives to bioinspired systems development are proposed.

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The Effect of Exchangeable Cations on the Sorption of Chlorophyllin By Montmorillonite

Cited by 12 publications

References 5 publications

Porphyrin intercalation in mica-type silicates

Porphyrin intercalation in mica-type silicates

Simulações computacionais de moléculas com aplicações em biociências

Functionalizing Inorganic Solids: Towards Organic–Inorganic Nanostructured Materials for Intelligent and Bioinspired Systems

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