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Piergentili, I. (author), Cai, Mao (author), Klemm, B. (author), Xu, B. (author), Luo, Sanzhong (author), Eelkema, R. (author)
The redox balance in tumor and diseased cells often leads to the production of reactive oxygen species (ROS). Many ROS-responsive materials based on sulfur oxidation have been reported with the goal of achieving controlled delivery at the tumor. However, these materials often lack responsiveness to low ROS concentrations present in the tumor...
journal article 2023
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Zhao, Guofeng (author), Moulijn, J.A. (author), Kapteijn, F. (author), Dautzenberg, Frits M. (author), Xu, Bin (author), Lu, Yong (author)
Heterogeneous catalysis plays a pivotal role in the current chemical and energy vectors production. Notably, to fully utilize the intrinsic activity and selectivity of a catalyst, the chemical reactor has to be designed and operated optimally to achieve enhanced heat/mass transfer, well-defined contact time of reactants, uniform flow pattern,...
journal article 2023
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Zhang, W. (author), Li, Huanhuan (author), Younes, S.H.H. (author), Gómez De Santos, Patricia (author), Tieves, F. (author), Grogan, Gideon (author), Pabst, Martin (author), Alcalde, Miguel (author), Whitwood, Adrian C. (author), Hollmann, F. (author)
Aromatic hydroxylation reactions catalyzed by heme-thiolate enzymes proceed via an epoxide intermediate. These aromatic epoxides could be valuable building blocks for organic synthesis giving access to a range of chiral trans-disubstituted cyclohexadiene synthons. Here, we show that naphthalene epoxides generated by fungal peroxygenases can...
journal article 2021
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de Vrijer, T. (author), Ravichandran, Ashwath (author), Bouazzata, Bilal (author), Smets, A.H.M. (author)
Low-cost multijunction photovoltaic devices are the next step in the solar energy revolution. Adding a bottom junction with a low bandgap energy material through plasma enhanced chemical vapor deposition (PECVD) processing could potentially provide a low-cost boost in conversion efficiency. A logical candidate for this low bandgap material is...
journal article 2021
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Yoon, Jaeho (author), Kim, Jinhyun (author), Tieves, F. (author), Zhang, W. (author), Alcalde, Miguel (author), Hollmann, F. (author), Park, Chan Beum (author)
Peroxygenases have long inspired the selective oxyfunctionalization of various aliphatic and aromatic compounds, because of their broad substrate spectrum and simplicity of catalytic mechanism. This study provides a proof-of-concept of piezobiocatalysis by demonstrating peroxygenase-catalyzed oxyfunctionalization reactions fueled by...
journal article 2020
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Ampurdanés, Jordi (author), Bunea, S. (author), Urakawa, A. (author)
Electrolysis-assisted nitrate (NO<sub>3</sub><sup>−</sup>) reduction is a promising approach for its conversion to harmless N<sub>2</sub> from waste, ground, and drinking water due to the possible process simplicity by in-situ generation of H<sub>2</sub>/H/H<sup>+</sup> by water electrolysis and to the flexibility given by tunable redox...
journal article 2020
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Tieves, F. (author), Willot, S.J. (author), van Schie, M.M.C.H. (author), Rauch, M.C.R. (author), Younes, S.H.H. (author), Zhang, W. (author), Dong, J. (author), Gomez de Santos, P. (author), Hollmann, F. (author)
An increasing number of biocatalytic oxidation reactions rely on H <sub>2</sub> O <sub>2</sub> as a clean oxidant. The poor robustness of most enzymes towards H <sub>2</sub> O <sub>2</sub> , however, necessitates more efficient systems for in situ H <sub>2</sub> O <sub>2</sub> generation. In analogy to the well-known formate dehydrogenase to...
journal article 2019
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van Schie, M.M.C.H. (author), Zhang, W. (author), Tieves, F. (author), Choi, Da Som (author), Park, Chan Beum (author), Burek, Bastien O. (author), Bloh, Jonathan Z. (author), Arends, I.W.C.E. (author), Paul, C.E. (author), Alcalde, Miguel (author), Hollmann, F. (author)
Peroxygenases are very interesting catalysts for specific oxyfunctionalization chemistry. Instead of relying on complicated electron transport chains, they rely on simple hydrogen peroxide as the stoichiometric oxidant. Their poor robustness against H<sub>2</sub>O<sub>2</sub> can be addressed via in situ generation of H<sub>2</sub>O<sub>2<...
journal article 2019
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Chen, Ying (author), Zhang, Xun (author), van der Zwaag, S. (author), Sloof, W.G. (author), Xiao, Ping (author)
A self‐healing thermal barrier coating (TBC) system is manufactured by air plasma spraying (APS) and tested by thermal cycling. The ceramic topcoat in the self‐healing APS TBC system consists of an yttria stabilised zirconia (YSZ) matrix and contains self‐shielding aluminium containing MoSi2 healing particles dispersed close to the topcoat/bond...
journal article 2019
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Dong, J. (author), Fernandez Fueyo, E. (author), Hollmann, F. (author), Paul, C.E. (author), Pesic, M. (author), Schmidt, S. (author), Wang, Yonghua (author), Younes, S.H.H. (author), Zhang, W. (author)
Oxidation chemistry using enzymes is approaching maturity and practical applicability in organic synthesis. Oxidoreductases (enzymes catalysing redox reactions) enable chemists to perform highly selective and efficient transformations ranging from simple alcohol oxidations to stereoselective halogenations of non‐activated C−H bonds. For many of...
journal article 2018
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Zhang, W. (author), Gacs, Jenő (author), Arends, I.W.C.E. (author), Hollmann, F. (author)
The aerobic organocatalytic oxidation of alcohols was achieved by using water-soluble sodium anthraquinone sulfonate. Under visible-light activation, this catalyst mediated the aerobic oxidation of alcohols to aldehydes and ketones. The photo-oxyfunctionalization of alkanes was also possible under these conditions.
journal article 2017
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Fernandez Fueyo, E. (author), Younes, S.H.H. (author), Van Rootselaar, Stefan (author), Aben, René W M (author), Renirie, R. (author), Wever, Ron (author), Holtmann, Dirk (author), Rutjes, Floris P J T (author), Hollmann, F. (author)
A catalytic, enzyme-initiated (aza-) Achmatowicz reaction is presented. The involvement of a robust vanadium-dependent peroxidase from Curvularia inaequalis allows the simple use of H<sub>2</sub>O<sub>2</sub> and catalytic amounts of bromide.
journal article 2016
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Skupien, E. (author), Berger, R.J. (author), Santos, V.P. (author), Gascon, J. (author), Makkee, M. (author), Kreutzer, M.T. (author), Kooyman, P.J. (author), Moulijn, J.A. (author), Kapteijn, F. (author)
Benzyl alcohol oxidation was carried out in toluene as solvent, in the presence of the potentially inhibiting oxidation products benzaldehyde and benzoic acid. Benzoic acid, or a product of benzoic acid, is identified to be the inhibiting species. The presence of a basic potassium salt (K2CO3 or KF) suppresses this inhibition, but promotes the...
journal article 2014
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Honarmand Ebrahimi, K. (author), Dienemann, C. (author), Hoefgens, S. (author), Than, M.E. (author), Hagedoorn, P.L. (author), Hagen, W.R. (author)
The ubiquitous 24-meric iron-storage protein ferritin and multicopper oxidases such as ceruloplasmin or hephaestin catalyze oxidation of Fe(II) to Fe(III), using molecular oxygen as oxidant. The ferroxidase activity of these proteins is essential for cellular iron homeostasis. It has been reported that the amyloid precursor protein (APP) also...
journal article 2013
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Seshan, V. (author), Ullien, D. (author), Castellanos-Gomez, A. (author), Sachdeva, S. (author), Murthy, D.H.K. (author), Savenije, T.J. (author), Ahmad, H.A. (author), Nunney, T.S. (author), Janssens, S.D. (author), Haenen, K. (author), Nesládek, M. (author), Van der Zant, H.S.J. (author), Sudhölter, E.J.R. (author), De Smet, L.C.P.M. (author)
A high-temperature procedure to hydrogenate diamond films using molecular hydrogen at atmospheric pressure was explored. Undoped and doped chemical vapour deposited (CVD) polycrystalline diamond films were treated according to our annealing method using a H2 gas flow down to ?50 ml/min (STP) at ?850?°C. The films were extensively evaluated by...
journal article 2013
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Rosenberg, S.G. (author), Landheer, K. (author), Hagen, C.W. (author), Fairbrother, D.H. (author)
Using three different precursors [MeCpPtMe3, Pt(PF3)4, and W(CO)6], an ultra-high vacuum surface science approach has been used to identify and rationalize the effects of substrate temperature and electron fluence on the chemical composition and bonding in films created by electron beam induced deposition (EBID). X-ray photoelectron spectroscopy...
journal article 2012
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Ramanandan, G.K.P. (author), Ramakrishnan, G. (author), Planken, P.C.M. (author)
Terahertz (THz) transmission spectroscopy is used to measure the oxidation kinetics of copper thin films evaporated on silicon substrates. The transmission of broadband THz pulses from 1 to 7 THz through the copper film is measured while it gets oxidized at an elevated temperature in ambient air. The change in the transmitted THz electric field...
journal article 2012
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Wu, Y. (author), Wang, Y.M. (author), Song, G.M. (author), Li, X.W. (author)
Oxidation behavior of a Re-based diffusion barrier/Ni–Al coated single-crystal (SC) Ni-based TMS-82+ superalloy was studied to compare with those of the base and Ni–Al coated superalloys under cyclic air at 1150 °C for 200 h. The base superalloy showed a negative mass gain due to extensive oxide spallation, and the Ni–Al coated superalloy...
journal article 2011
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Faradzhev, N. (author), Sidorkin, V. (author)
The authors report on the interaction of atomic hydrogen with Sn and thin Ru film at room temperature. The study is done using a combination of photoelectron and low energy ion scattering spectroscopies as well as scanning electron microscopy. The adsorption of hydrogen on a Sn surface leads to the formation of stannane (SnH4), which...
journal article 2009
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Botman, A. (author), Hesselberth, M. (author), Mulders, J.J.L. (author)
Focused electron-beam-induced deposition (EBID) allows the rapid fabrication of three-dimensional nanodevices and metallic wiring of nanostructures, and is a promising technique for many applications in nanoresearch. The authors present two topics on platinum-containing nanostructures created by EBID. First, they report on a TEM study of the...
journal article 2008
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