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Pinar A, Márquez-Álvarez C, Grande-Casas M, Pérez-Pariente J. Template-controlled acidity and catalytic activity of ferrierite crystals. J Catal 2009. [DOI: 10.1016/j.jcat.2009.02.017] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Augugliaro V, Loddo V, López-Muñoz MJ, Márquez-Álvarez C, Palmisano G, Palmisano L, Yurdakal S. Home-prepared anatase, rutile, and brookite TiO2 for selective photocatalytic oxidation of 4-methoxybenzyl alcohol in water: reactivity and ATR-FTIR study. Photochem Photobiol Sci 2009; 8:663-9. [DOI: 10.1039/b818353h] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Álvaro-Muñoz T, Sastre E, Márquez-Álvarez C. Microwave-assisted synthesis of plate-like SAPO-34 nanocrystals with increased catalyst lifetime in the methanol-to-olefin reaction. Catal Sci Technol 2014. [DOI: 10.1039/c4cy00775a] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Microwave mediated synthesis produced SAPO-34 nanocrystals with increased catalyst lifetime in the methanol-to-olefin reaction owing to their plate-like crystal shape.
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Gascón V, Díaz I, Márquez-Álvarez C, Blanco RM. Mesoporous silicas with tunable morphology for the immobilization of laccase. Molecules 2014; 19:7057-71. [PMID: 24886935 PMCID: PMC6272017 DOI: 10.3390/molecules19067057] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 05/20/2014] [Accepted: 05/23/2014] [Indexed: 11/25/2022] Open
Abstract
Siliceous ordered mesoporous materials (OMM) are gaining interest as supports for enzyme immobilization due to their uniform pore size, large surface area, tunable pore network and the introduction of organic components to mesoporous structure. We used SBA-15 type silica materials, which exhibit a regular 2D hexagonal packing of cylindrical mesopores of uniform size, for non-covalent immobilization of laccase. Synthesis conditions were adjusted in order to obtain supports with different particle shape, where those with shorter channels had higher loading capacity. Despite the similar isoelectric points of silica and laccase and the close match between the size of laccase and the pore dimensions of these SBA-15 materials, immobilization was achieved with very low leaching. Surface modification of macro-/mesoporous amorphous silica by grafting of amine moieties was proved to significantly increase the isoelectric point of this support and improve the immobilization yield.
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Mamo W, Chebude Y, Márquez-Álvarez C, Díaz I, Sastre E. Comparison of glucose conversion to 5-HMF using different modified mordenites in ionic liquid and biphasic media. Catal Sci Technol 2016. [DOI: 10.1039/c5cy02070k] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Modified mordenites have been used in the direct conversion of glucose into 5-hydroxymethylfurfural (5-HMF) in two different media: the ionic liquid 1-butyl-3-methylimidazolium bromide ([BMIM]Br) and a biphasic system composed of water–acetone and ethyl acetate.
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Gascón V, Díaz I, Blanco RM, Márquez-Álvarez C. Hybrid periodic mesoporous organosilica designed to improve the properties of immobilized enzymes. RSC Adv 2014. [DOI: 10.1039/c4ra05362a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Hybrid organosilica supports synthesized with pore size adjusted to enzyme dimensions provide high stability in organic solvent systems and prevent leaching.
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Álvaro-Muñoz T, Márquez-Álvarez C, Sastre E. Effect of silicon content on the catalytic behavior of chabazite type silicoaluminophosphate in the transformation of methanol to short chain olefins. Catal Today 2013. [DOI: 10.1016/j.cattod.2013.04.031] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Álvaro-Muñoz T, Márquez-Álvarez C, Sastre E. Enhanced stability in the methanol-to-olefins process shown by SAPO-34 catalysts synthesized in biphasic medium. Catal Today 2013. [DOI: 10.1016/j.cattod.2013.03.015] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Mayoral A, Arenal R, Gascón V, Márquez-Álvarez C, Blanco RM, Díaz I. Designing Functionalized Mesoporous Materials for Enzyme Immobilization: Locating Enzymes by Using Advanced TEM Techniques. ChemCatChem 2013. [DOI: 10.1002/cctc.201200737] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Pinilla-Herrero I, Márquez-Álvarez C, Sastre E. Complex relationship between SAPO framework topology, content and distribution of Si and catalytic behaviour in the MTO reaction. Catal Sci Technol 2017. [DOI: 10.1039/c7cy01250k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three small-pore silicoaluminophosphates containing relatively large cavities in their structure (LEV, LTA and SAV) have been hydrothermally synthesized with various silicon concentrations.
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Alfayate A, Márquez-Álvarez C, Grande-Casas M, Sánchez-Sánchez M, Pérez-Pariente J. Ti(III)APO-5 materials as selective catalysts for the allylic oxidation of cyclohexene: Effect of Ti source and Ti content. Catal Today 2014. [DOI: 10.1016/j.cattod.2013.09.034] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Chen FJ, Gao ZR, Li J, Gómez-Hortigüela L, Lin C, Xu L, Du HB, Márquez-Álvarez C, Sun J, Camblor MA. Structure–direction towards the new large pore zeolite NUD-3. Chem Commun (Camb) 2021; 57:191-194. [DOI: 10.1039/d0cc07333d] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A subtle structure–direction allows the crystallization of the ordered and fully connected zeolite NUD-3 instead of disordered or interrupted versions.
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Awoke Y, Chebude Y, Márquez-Álvarez C, Díaz I. Solvent free epoxidation of vernonia oil using Ti-SBA-15 with tailor made particle morphology and pore size. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.09.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Pinilla-Herrero I, Márquez-Álvarez C, Sastre E. Methanol-to-olefin reaction on SAPO-35 catalysts synthesized with controlled crystal size and using mesoporogen additives. Catal Today 2016. [DOI: 10.1016/j.cattod.2015.11.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Guesh K, J. López-Muñoz M, Márquez-Álvarez C, Chebude Y, Diaz I. Ethiopian natural zeolites for photocatalysis. B CHEM SOC ETHIOPIA 2015. [DOI: 10.4314/bcse.v29i3.11] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Agúndez J, Ares C, Márquez-Álvarez C, Pérez-Pariente J. Catalytic oxidation of cyclohexene by supported gold nanoclusters synthesized in a two-liquid phases system containing eucalyptus essential oil. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.110922] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Mohammadnasabomran S, Márquez-Álvarez C, Pérez-Pariente J, Martínez A. Short-channel mesoporous SBA-15 silica modified by aluminum grafting as a support for CoRu Fischer–Tropsch synthesis catalysts. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02418j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Highly ordered short-channel mesoporous silica SBA-15 with large pores (11.2 nm) was synthesized from tetramethyl orthosilicate, using the block copolymer Pluronic PE-10400 as structure-directing agent, and triisopropylbenzene as a swelling agent.
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de la Serna R, Nieto D, Sainz R, Bernardo-Maestro B, Mayoral Á, Márquez-Álvarez C, Pérez-Pariente J, Gómez-Hortigüela L. GTM-3, an Extra-Large Pore Enantioselective Chiral Zeolitic Catalyst. J Am Chem Soc 2022; 144:8249-8256. [PMID: 35502872 PMCID: PMC9100664 DOI: 10.1021/jacs.2c01874] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The development of chiral zeolitic catalysts possessing extra-large pores and endowed with the capability of enantioselectively processing bulky products represents one of the greatest challenges in chemistry. Here, we report the discovery of GTM-3, an enantio-enriched extra-large pore chiral zeolite material with -ITV framework structure, obtained using a simple enantiopure organic cation derived from the chiral pool, N,N-ethyl-methyl-pseudoephedrinium, as the chiral-inductor agent. We demonstrate the enantio-enrichment of GTM-3 in one of the two enantiomorphic polymorphs using the two enantiomers of the organic cation. Interestingly, we prove the ability of this zeolitic material to perform enantioselective catalytic operations with very large substrates, here exemplified by the catalytic epoxide aperture of the bulky trans-stilbene oxide with alcohols, yielding unprecedented product enantiomeric excesses up to 30%. Our discovery opens the way for the use of accessible chiral zeolitic materials for the catalytic asymmetric synthesis of chiral pharmaceutical compounds.
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Guesh K, Mayoral Á, Chebude Y, López-Muñoz MJ, Márquez-Álvarez C, Diaz I. Effect of thermal treatment on the photocatalytic behavior of TiO 2 supported on zeolites. NEW J CHEM 2018. [DOI: 10.1039/c8nj01737a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photocatalysts based on TiO2 supported on two different synthetic zeolites (faujasite CBV 760: SiO2/Al2O3 = 60 and mordenite CBV 21A, SiO2/Al2O3 = 20), containing 10 wt% and 40 wt% TiO2 loading, have been synthesized using a sol–gel method without any further calcination.
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García-Ruiz M, Solís-Casados DA, Aguilar-Pliego J, Márquez-Álvarez C, Sastre-de Andrés E, Sanjurjo-Tartalo D, Sáinz-Vaque R, Grande-Casas M. Synthesis of 10 and 12 Ring Zeolites (MCM-22, TNU-9 and MCM-68) Modified with Zn and Its Potential Application in the Reaction of Methanol to Light Aromatics and Olefins. Top Catal 2020. [DOI: 10.1007/s11244-020-01242-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Gao Z, Márquez-Álvarez C, Balestra SRG, Yu H, Villaescusa LA, Camblor MA. Mechanism of the Low-Temperature Organic Removal from Imidazolium-Containing Zeolites by Ozone Treatment: Fluoride Retention in Double-4-Rings. Inorg Chem 2024; 63:9953-9966. [PMID: 38757795 PMCID: PMC11134512 DOI: 10.1021/acs.inorgchem.4c01021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 04/18/2024] [Accepted: 05/08/2024] [Indexed: 05/18/2024]
Abstract
For zeolites synthesized using imidazolium cations, the organic matter can be extracted at very low temperatures (100 °C) using ozone. This is possible for zeolites with 12-ring or larger pores but requires higher temperatures in medium-pore zeolites. The first chemical events in this process occur fast, even at room temperature, and imply the loss of aromaticity likely by the formation of an adduct between ozone and the imidazole ring through carbons C4 and C5. Subsequent rupture of the imidazole ring provides smaller and more flexible fragments that can desorb more readily. This process has been studied experimentally, mainly through infrared spectroscopy, and theoretically by density functional theory. Amazingly, fluoride anions occluded in the small double-four-ring units (d4r) during the synthesis remain inside the cage throughout the whole process when the temperature is not too high (≤150 °C). However, fluoride in larger cages in MFI ends up bonded to silicon in penta or hexacoordinated units, likely out of the cages, after ozone treatment at 150 °C. For several germanosilicate zeolites, the process allows their subsequent degermanation to yield stable high-silica zeolites. Quaternary ammonium cations require harsher conditions that eventually also extract fluoride from zeolite cages, including the d4r unit.
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Yu H, Kim EJ, Gao ZR, Lee JH, Balestra SRG, Ma C, Li J, Márquez-Álvarez C, Marler B, Hong SB, Camblor MA. Structure, and Phase Transformations of HPM-3: A Layered Precursor of the Neutral Aluminophosphate with JSN Topology. Inorg Chem 2024; 63:24429-24439. [PMID: 39652748 PMCID: PMC11918533 DOI: 10.1021/acs.inorgchem.4c04881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2024]
Abstract
The structure of HPM-3, a layered aluminophosphate prepared using 1,2,3-trimethylimidazolium (123TMI) as an organic structure-directing agent by the fluoride route, has been solved by continuous rotation electron diffraction (cRED), and Rietveld refined against synchrotron powder X-ray diffraction data. Charge balance of the occluded cation is achieved through F- anions and dangling Al(OP)3OH groups. Half of the Al is pentacoordinated in negatively charged Al(OP)4-F-Al(OP)4 pairs. The layers in HPM-3, denoted as jsn, are observed in the fully connected metalloaluminophosphate molecular sieves with JSN topology. Thus, HPM-3 can be a precursor to a JSN metal-free aluminophosphate if a topotactic condensation can be reached, which proved to be difficult but feasible. Treatments under different conditions resulted in a number of known (PST-27 and AlPO4-5 by a disruptive transformation) or new phases (through mild thermal treatments). Among the latter, a layered phase with a shorter interlayer space, denoted as HPM-3S, contains half the amount of organic as HPM-3. This is afforded by the capability of 123TMI compounds to sublimate at relatively low temperatures. HPM-3S still contains the same jsn layers. Therefore, the transformation of HPM-3 into HPM-3S is topotactic but without reaching condensation. Among the phases appearing under calcination conditions at relatively low temperature (<350 °C), we observed solids compatible with the JSN topology, but with poor crystallinity. This is attributed to a wrong alignment in HPM-3 of the dangling Al(OP)3OH and P(OAl)3═O that should connect adjacent layers in a topotactic condensation, which favors 1-dimensional stacking disorder by random shifts of layers during the thermal treatments. However, detemplation at a much lower temperature (175 °C) using O3 finally afforded an aluminophosphate molecular sieve with JSN topology with only moderate stacking disorder. This is just the third reported 2D-to-3D topotactic condensations in aluminophosphates.
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Gao ZR, Yu H, Chen FJ, Mayoral A, Niu Z, Niu Z, Li X, Deng H, Márquez-Álvarez C, He H, Xu S, Zhou Y, Xu J, Xu H, Fan W, Balestra SRG, Ma C, Hao J, Li J, Wu P, Yu J, Camblor MA. Interchain-expanded extra-large-pore zeolites. Nature 2024; 628:99-103. [PMID: 38538794 DOI: 10.1038/s41586-024-07194-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 02/12/2024] [Indexed: 04/01/2024]
Abstract
Stable aluminosilicate zeolites with extra-large pores that are open through rings of more than 12 tetrahedra could be used to process molecules larger than those currently manageable in zeolite materials. However, until very recently1-3, they proved elusive. In analogy to the interlayer expansion of layered zeolite precursors4,5, we report a strategy that yields thermally and hydrothermally stable silicates by expansion of a one-dimensional silicate chain with an intercalated silylating agent that separates and connects the chains. As a result, zeolites with extra-large pores delimited by 20, 16 and 16 Si tetrahedra along the three crystallographic directions are obtained. The as-made interchain-expanded zeolite contains dangling Si-CH3 groups that, by calcination, connect to each other, resulting in a true, fully connected (except possible defects) three-dimensional zeolite framework with a very low density. Additionally, it features triple four-ring units not seen before in any type of zeolite. The silicate expansion-condensation approach we report may be amenable to further extra-large-pore zeolite formation. Ti can be introduced in this zeolite, leading to a catalyst that is active in liquid-phase alkene oxidations involving bulky molecules, which shows promise in the industrially relevant clean production of propylene oxide using cumene hydroperoxide as an oxidant.
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García-Molina G, Peters E, Palmeri R, Awoke Y, Márquez-Álvarez C, Blanco RM. Enzymatic synthesis of Hydroxytyrosol from Oleuropein for valorization of an agricultural waste. Bioengineered 2024; 15:2396647. [PMID: 39235136 PMCID: PMC11382736 DOI: 10.1080/21655979.2024.2396647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 07/11/2024] [Accepted: 07/23/2024] [Indexed: 09/06/2024] Open
Abstract
Oleuropein (OP) is an appreciated compound present not only in fruits but also in leaves of olive trees, which can be transformed into hydroxytyrosol (HT), a substance with high antioxidant activity. In this work, the transformation of an agricultural residue containing OP (olive leaves or wastewater from mills) to the high added value compound HT is accomplished through different enzymatic strategies. Different enzymes were used, immobilized on various supports by diverse binding forces: beta-glucosidase encapsulated in siliceous material, esterases and lipases immobilized on hydrophobic supports (octyl-functionalized amorphous silica and periodic mesoporous organosilica), and esterase immobilized on amine-functionalized ordered mesoporous silica. All these biocatalysts were tested for oleuropein hydrolysis through two different reaction approaches: a) split of glucosidic bond catalyzed by beta-glucosidase (β-glu), followed by hydrolysis of the aglycon and further ester hydrolysis. 5 mg·mL-1 of β-glu fully hydrolyzed 5 mM OP at pH 7 and 50°C in 7 days, and further enzymatic hydrolysis of the aglycon yielded near to 0.5 mM HT in the best conditions tested. b) via direct hydrolysis of the ester bond to produce hydroxytyrosol in a one-step reaction using esterases or lipases. The latter reaction pathway catalyzed by lipase from Penicillium camemberti immobilized on octyl-silica (4 mg·mL-1) at 35°C and pH 6 directly produced 6.8 mM HT (1 mg·mL-1), transforming in 12 days near to 30% of the initial 25 mM OP from a commercial olive leaves extract.
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