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Tan KH, Cham HY, Awala H, Ling TC, Mukti RR, Wong KL, Mintova S, Ng EP. Effect of Extra-Framework Cations of LTL Nanozeolites to Inhibit Oil Oxidation. NANOSCALE RESEARCH LETTERS 2015; 10:956. [PMID: 26058517 PMCID: PMC4463947 DOI: 10.1186/s11671-015-0956-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Accepted: 05/26/2015] [Indexed: 06/04/2023]
Abstract
Lubricant oils take significant part in current health and environmental considerations since they are an integral and indispensable component of modern technology. Antioxidants are probably the most important additives used in oils because oxidative deterioration plays a major role in oil degradation. Zeolite nanoparticles (NPs) have been proven as another option as green antioxidants in oil formulation. The anti-oxidative behavior of zeolite NPs is obvious; however, the phenomenon is still under investigation. Herein, a study of the effect of extra-framework cations stabilized on Linde Type L (LTL) zeolite NPs (ca. 20 nm) on inhibition of oxidation in palm oil-based lubricant oil is reported. Hydrophilic LTL zeolites with a Si/Al ratio of 3.2 containing four different inorganic cations (Li(+), Na(+), K(+), Ca(2+)) were applied. The oxidation of the lubricant oil was followed by visual observation, colorimetry, fourier transform infrared (FTIR) spectroscopy, (1)H NMR spectroscopy, total acid number (TAN), and rheology analyses. The effect of extra-framework cations to slow down the rate of oil oxidation and to control the viscosity of oil is demonstrated. The degradation rate of the lubricant oil samples is decreased considerably as the polarizability of cation is increased with the presence of zeolite NPs. More importantly, the microporous zeolite NPs have a great influence in halting the steps that lead to the polymerization of the oils and thus increasing the lifetime of oils.
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Affiliation(s)
- Kok-Hou Tan
- />School of Chemical Sciences, Universiti Sains Malaysia, Penang, Malaysia
| | - Hooi-Ying Cham
- />School of Chemical Sciences, Universiti Sains Malaysia, Penang, Malaysia
| | - Hussein Awala
- />Laboratoire Catalyse & Spectrochimie, CNRS-ENSICAEN, Université de Caen, Caen, France
| | - Tau Chuan Ling
- />Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Rino R Mukti
- />Division of Inorganic and Physical Chemistry, Institut Teknologi Bandung, Bandung, Indonesia
| | - Ka-Lun Wong
- />Natural Sciences and Science Education, NIE, Nanyang Technological University, Singapore, Singapore
| | - Svetlana Mintova
- />Laboratoire Catalyse & Spectrochimie, CNRS-ENSICAEN, Université de Caen, Caen, France
| | - Eng-Poh Ng
- />School of Chemical Sciences, Universiti Sains Malaysia, Penang, Malaysia
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Tan KH, Awala H, Mukti RR, Wong KL, Rigaud B, Ling TC, Aleksandrov HA, Koleva IZ, Vayssilov GN, Mintova S, Ng EP. Inhibition of palm oil oxidation by zeolite nanocrystals. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:4655-4663. [PMID: 25897618 DOI: 10.1021/acs.jafc.5b00380] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The efficiency of zeolite X nanocrystals (FAU-type framework structure) containing different extra-framework cations (Li(+), Na(+), K(+), and Ca(2+)) in slowing the thermal oxidation of palm oil is reported. The oxidation study of palm oil is conducted in the presence of zeolite nanocrystals (0.5 wt %) at 150 °C. Several characterization techniques such as visual analysis, colorimetry, rheometry, total acid number (TAN), FT-IR spectroscopy, (1)H NMR spectroscopy, and Karl Fischer analyses are applied to follow the oxidative evolution of the oil. It was found that zeolite nanocrystals decelerate the oxidation of palm oil through stabilization of hydroperoxides, which are the primary oxidation product, and concurrently via adsorption of the secondary oxidation products (alcohols, aldehydes, ketones, carboxylic acids, and esters). In addition to the experimental results, periodic density functional theory (DFT) calculations are performed to elucidate further the oxidation process of the palm oil in the presence of zeolite nanocrystals. The DFT calculations show that the metal complexes formed with peroxides are more stable than the complexes with alkenes with the same ions. The peroxides captured in the zeolite X nanocrystals consequently decelerate further oxidation toward formation of acids. Unlike the monovalent alkali metal cations in the zeolite X nanocrystals (K(+), Na(+), and Li(+)), Ca(2+) reduced the acidity of the oil by neutralizing the acidic carboxylate compounds to COO(-)(Ca(2+))1/2 species.
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Affiliation(s)
- Kok-Hou Tan
- †School of Chemical Sciences, Universiti Sains Malaysia, Penang, Malaysia
| | | | - Rino R Mukti
- §Division of Inorganic and Physical Chemistry, Institut Teknologi Bandung, Bandung, Indonesia
| | - Ka-Lun Wong
- ⊥National Institute of Education, Nanyang Technological University, Singapore
| | | | - Tau Chuan Ling
- #Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | | | - Iskra Z Koleva
- ΔFaculty of Chemistry and Pharmacy, University of Sofia, Sofia, Bulgaria
| | - Georgi N Vayssilov
- ΔFaculty of Chemistry and Pharmacy, University of Sofia, Sofia, Bulgaria
| | | | - Eng-Poh Ng
- †School of Chemical Sciences, Universiti Sains Malaysia, Penang, Malaysia
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Hallett-Tapley GL, Schepp NP, Cozens FL. The reactivity of diarylmethyl carbocations within non-protic zeolites. CAN J CHEM 2011. [DOI: 10.1139/v10-150] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The generation of diarylmethyl carbocations within non-protic zeolites (LiY, NaY, KY, RbY, CsY, and NaX) was carried out via laser excitation (266 nm or 266 nm / 308 nm) of diarylacetic acids. Rapid loss of CO2, followed by photochemical oxidation of the diarylmethyl radicals resulted in the formation of the diarylmethyl carbocations. The reactivity of the diarylmethyl carbocations was found to be highly dependent on the alkali metal counterion and the Si/Al ratio of the zeolite framework. Furthermore, the effect of various para-electron donating substituents (4-H, 3-CH3, 4-CH3, 4,4′-CH3, and 4-OCH3) on the diarylmethyl carbocation reactivity was investigated. Comparison of the Hammett plots constructed for the reactivity of the diarylmethyl carbocations in zeolites with those in solution (CH3CN–H2O (1:2) and TFE) showed decreased sensitivity of the electrophilic species towards para-electron donating substituents in the heterogeneous media. The leveling effect observed in the zeolite Hammett plots has been attributed to the presence of an isokinetic relationship, specifically, a low isokinetic temperature for the reaction of diarylmethyl carbocations with the aluminosilicate zeolite framework.
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Affiliation(s)
| | - Norman P. Schepp
- Department of Chemistry, Dalhousie University, Halifax, NS B3H 4J3, Canada
| | - Frances L. Cozens
- Department of Chemistry, Dalhousie University, Halifax, NS B3H 4J3, Canada
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Franco M, Rosenbach, N, Ferreira GB, Guerra ACO, Kover WB, Turci CC, Mota CJA. Rearrangement, Nucleophilic Substitution, and Halogen Switch Reactions of Alkyl Halides over NaY Zeolite: Formation of the Bicyclobutonium Cation Inside the Zeolite Cavity. J Am Chem Soc 2008; 130:1592-600. [DOI: 10.1021/ja0742939] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Marcelo Franco
- Universidade Federal do Rio de Janeiro, Instituto de Química, Av Athos da Silveira Ramos 149, CT Bloco A, Cidade Universitária 21941-909, Rio de Janeiro, Brazil and Centro Federal de Educação Tecnológica Celso Suckow da Fonseca, Rio de Janeiro, 20271-110, Brazil
| | - Nilton Rosenbach,
- Universidade Federal do Rio de Janeiro, Instituto de Química, Av Athos da Silveira Ramos 149, CT Bloco A, Cidade Universitária 21941-909, Rio de Janeiro, Brazil and Centro Federal de Educação Tecnológica Celso Suckow da Fonseca, Rio de Janeiro, 20271-110, Brazil
| | - Glaucio B. Ferreira
- Universidade Federal do Rio de Janeiro, Instituto de Química, Av Athos da Silveira Ramos 149, CT Bloco A, Cidade Universitária 21941-909, Rio de Janeiro, Brazil and Centro Federal de Educação Tecnológica Celso Suckow da Fonseca, Rio de Janeiro, 20271-110, Brazil
| | - Antônio C. O. Guerra
- Universidade Federal do Rio de Janeiro, Instituto de Química, Av Athos da Silveira Ramos 149, CT Bloco A, Cidade Universitária 21941-909, Rio de Janeiro, Brazil and Centro Federal de Educação Tecnológica Celso Suckow da Fonseca, Rio de Janeiro, 20271-110, Brazil
| | - W. Bruce Kover
- Universidade Federal do Rio de Janeiro, Instituto de Química, Av Athos da Silveira Ramos 149, CT Bloco A, Cidade Universitária 21941-909, Rio de Janeiro, Brazil and Centro Federal de Educação Tecnológica Celso Suckow da Fonseca, Rio de Janeiro, 20271-110, Brazil
| | - Cássia C. Turci
- Universidade Federal do Rio de Janeiro, Instituto de Química, Av Athos da Silveira Ramos 149, CT Bloco A, Cidade Universitária 21941-909, Rio de Janeiro, Brazil and Centro Federal de Educação Tecnológica Celso Suckow da Fonseca, Rio de Janeiro, 20271-110, Brazil
| | - Claudio J. A. Mota
- Universidade Federal do Rio de Janeiro, Instituto de Química, Av Athos da Silveira Ramos 149, CT Bloco A, Cidade Universitária 21941-909, Rio de Janeiro, Brazil and Centro Federal de Educação Tecnológica Celso Suckow da Fonseca, Rio de Janeiro, 20271-110, Brazil
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Kataoka T, Mozer AJ, Tsukahara Y, Yamauchi T, Wada Y. Evidence for Encaging Luminescent Guest Molecules in the Inner Cages of Zeolite Host. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2007. [DOI: 10.1246/bcsj.80.2303] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Chrétien MN, Shen B, García H, English AM, Scaiano JC. Ship-in-a-Bottle Synthesis of Fluorescence-labeled Nanoparticles: Applications in Cellular Imaging¶. Photochem Photobiol 2007. [DOI: 10.1111/j.1751-1097.2004.tb00110.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Bein T. Host–Guest Interactions in Zeolites and Periodic Mesoporous Materials. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/s0167-2991(07)80806-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
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9
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Sakamoto M, Cai X, Fujitsuka M, Majima T. Properties and Reactivity of Xanthyl Radical in the Excited State. J Phys Chem A 2006; 110:9788-92. [PMID: 16898678 DOI: 10.1021/jp062118t] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The properties and reactivity of the 9-xanthyl radical (X(*)) in the doublet excited state (X(*)(D(1))) were investigated using nanosecond-picosecond two-color two-laser flash photolysis. The absorption and fluorescence spectra of X(*)(D(1)) were observed for the first time. The reactivity of X(*)(D(1)) toward a series of halogen donors and electron acceptors in acetonitrile and 1,2-dichloroethane (DCE) was investigated. It is confirmed that X(*)(D(1)) has a halogen abstraction ability from a series of halogen donors. On the basis of the solvent effect on the quenching rate constants of X(*)(D(1)), an electron transfer from X(*)(D(1)) to CCl(4) was indicated.
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Affiliation(s)
- Masanori Sakamoto
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan
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Cheng KAWY, Schepp NP, Cozens FL. Resolution of ultrafast pyrene excimer emission rise times in zeolites X and Y. Photochem Photobiol 2006; 82:132-8. [PMID: 16238452 DOI: 10.1562/2005-06-07-ra-565] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Pyrene has been a favorite photophysical probe molecule for zeolite research because of its ability to exhibit both monomer and excimer emission upon excitation. This study combines the use of ultrafast time-resolved fluorescence spectroscopy with steady-state fluorescence spectroscopy to study the excimer emission of pyrene incorporated within zeolites LiY, NaY, KY and NaX. The effects of sealing technique and coincorporated solvents are also explored. Pyrene excimer emission is resolvable with the use of an ultrafast streak camera under all conditions examined in this study with a rise-time range of 6.8 to 16.0 picoseconds. For each zeolite sample the addition of cosolvents decreases the rise time, with a greater decrease for polar solvents than for a nonpolar solvent. The presence of a detectable rise time for excimer emission indicates that pyrene excimer formation is a dynamic process when pyrene is embedded within the cavities of zeolite host materials.
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Affiliation(s)
- Karen A W Y Cheng
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, Canada, B3H 4J3
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Shea S, Schepp NP, Keirstead AE, Cozens FL. Dynamics of the transient species generated upon photolysis of diarylmethanes within zeolites Deprotonation and oxidation reactions. CAN J CHEM 2005. [DOI: 10.1139/v05-208] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The oxidation of diarylmethanes is a multistep process involving initial formation of a radical cation, deprotonation of the radical cation to the radical, and oxidation of the radical to the carbocation. The dynamics and efficiency of the last two steps in this process, namely deprotonation and oxidation, in acidic zeolites and non-acid zeolites are examined in the present work as a function of the acidity of the diarylmethane radical cations and the oxidation potential of the diarylmethyl radicals. Our results indicate that rate constants for deprotonation strongly depend on the acidity of the radical cations, but not on the composition of the zeolites. In addition, oxidation of the radicals to the diarylmethyl cations is strongly dependent on both the oxidation potential of the radicals and the oxidizing ability of the zeolite. This dependence allows oxidation potentials of the zeolites to be estimated.Key words: radical cations, carbocations, zeolites, laser flash photolysis.
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Chrétien MN, Shen B, García H, English AM, Scaiano JC. Ship-in-a-Bottle Synthesis of Fluorescence-labeled Nanoparticles: Applications in Cellular Imaging¶. Photochem Photobiol 2004; 80:434-7. [PMID: 15623326 DOI: 10.1562/0031-8655(2004)080<0434:ssofna>2.0.co;2] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Fluorescein (2-(6-hydroxy-3-oxo-(3H)-xanthen-9-yl)benzoic acid) has been prepared inside the pores of zeolite-Y via ship-in-a-bottle synthesis. Fluorescein, whose dimensions prevent it from entering through the approximately 7 A windows of the faujasite zeolite used, was prepared by the acid-catalyzed reaction of resorcinol and phthalic anhydride. In this article we report initial spectroscopic data as well as an example of the usefulness of these fluorescence-labeled nanoparticles for imaging applications such as confocal fluorescence microscopy. Encapsulated fluorescein shows a remarkable increase in photostability.
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Affiliation(s)
- Michelle N Chrétien
- Center for Catalysis Research and Innovation, Department of Chemistry, University of Ottawa, Ottawa, Canada
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Hashimoto S. Zeolite photochemistry: impact of zeolites on photochemistry and feedback from photochemistry to zeolite science. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2003. [DOI: 10.1016/s1389-5567(03)00003-0] [Citation(s) in RCA: 168] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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García H, Roth HD. Generation and reactions of organic radical cations in zeolites. Chem Rev 2002; 102:3947-4007. [PMID: 12428983 DOI: 10.1021/cr980026x] [Citation(s) in RCA: 257] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hermenegildo García
- Departamento de Química/Instituto de Tecnología Química UPV-CSIC, Universidad Politécnica de Valencia, Camino de Vera s/n, Apartado 22012, E-46071-Valencia, Spain
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Pischel U, Galletero MS, Garcı́a H, Miranda MA, Nau WM. Photophysical properties and fluorescence quenching of 2,3-diazabicyclo[2.2.2]oct-2-ene in zeolites. Chem Phys Lett 2002. [DOI: 10.1016/s0009-2614(02)00711-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Klumpp DA, Lau S, Garza M, Schick B, Kantardjieff K. Electrophilic Chemistry of Biologically Important α-Ketoacids. J Org Chem 1999. [DOI: 10.1021/jo9901945] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Douglas A. Klumpp
- Department of Chemistry, California State Polytechnic University, 3801 West Temple Avenue, Pomona, California 91768, and W. M. Keck Center for Molecular Structure, Department of Chemistry and Biochemistry, California State University, Fullerton, California, 92831
| | - Siufu Lau
- Department of Chemistry, California State Polytechnic University, 3801 West Temple Avenue, Pomona, California 91768, and W. M. Keck Center for Molecular Structure, Department of Chemistry and Biochemistry, California State University, Fullerton, California, 92831
| | - Manuel Garza
- Department of Chemistry, California State Polytechnic University, 3801 West Temple Avenue, Pomona, California 91768, and W. M. Keck Center for Molecular Structure, Department of Chemistry and Biochemistry, California State University, Fullerton, California, 92831
| | - Brian Schick
- Department of Chemistry, California State Polytechnic University, 3801 West Temple Avenue, Pomona, California 91768, and W. M. Keck Center for Molecular Structure, Department of Chemistry and Biochemistry, California State University, Fullerton, California, 92831
| | - Katherine Kantardjieff
- Department of Chemistry, California State Polytechnic University, 3801 West Temple Avenue, Pomona, California 91768, and W. M. Keck Center for Molecular Structure, Department of Chemistry and Biochemistry, California State University, Fullerton, California, 92831
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Casades I, Fornés V, Gigante B, Garcı́a H. Spectroscopic characterization of aggregates of squaric acid and squaric acid/bipyridine incorporated within basic zeolites. Chem Phys Lett 1999. [DOI: 10.1016/s0009-2614(99)00406-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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