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Bracco Garcia, M.P. (author), Busch, H. (author), von Langermann, J. (author), Hanefeld, U. (author)
The first enantioselective synthesis was the selective addition of cyanide to benzaldehyde catalysed by a hydroxynitrile lyase (HNL). Since then these enzymes have developed into a reliable tool in organic synthesis. HNLs to prepare either the (R)- or the (S)-enantiomer of the desired cyanohydrin are available and a wide variety of reaction...
journal article 2016
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Yarulina, I. (author), Kapteijn, F. (author), Gascon Sabate, J. (author)
Interpretation of catalytic performance during the MTH process is hampered by heat transport phenomena. We demonstrate that large temperature rises can occur during fixed bed labscale catalyst testing of ZSM-5, even when a large catalyst bed dilution is applied. Formation of mesopores in ZSM-5 leads to partial mitigation of these effects because...
journal article 2016
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Dekker, N.H. (author), Ha, S. (author), Janissen, R. (author), Ussembayev, Y. (author), van Oene, M.M. (author), Solano Hermosilla, B.P. (author)
Titanium dioxide (TiO2) is a key component of diverse optical and electronic applications that exploit its exceptional material properties. In particular, the use of TiO2 in its single-crystalline phase can offer substantial advantages over its amorphous and polycrystalline phases for existing and yet-to-be-developed applications. However, the...
journal article 2016
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Perrin, M.L. (author), Galán García, E. (author), Eelkema, R. (author), Thijssen, J.M. (author), Grozema, F.C. (author), van der Zant, H.S.J. (author)
In the pursuit of down-sizing electronic components, the ultimate limit is the use of single molecules as functional devices. The first theoretical proposal of such a device, predicted more than four decades ago, is the seminal Aviram–Ratner rectifier that exploits the orbital structure of the molecule. The experimental realization of single...
journal article 2016
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Silvestri, C. (author), Riccio, M. (author), Poelma, R.H. (author), Morana, B. (author), Vollebregt, S. (author), Santagata, F. (author), Irace, A. (author), Zhang, G.Q. (author), Sarro, P.M. (author)
Thermal material properties play a fundamental role in the thermal management of microelectronic systems. The porous nature of carbon nanotube (CNT) arrays results in a very high surface area to volume ratio, which makes the material attractive for surface driven heat transfer mechanisms. Here, we report on the heat transfer performance of...
journal article 2016
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Szymańska, K. (author), Odrozek, K. (author), Zniszczoł, A. (author), Torrelo, G. (author), Resch, V. (author), Hanefeld, U. (author), Jarzębskia, A.B. (author)
Acyltransferase from Mycobacterium smegmatis (MsAcT) immobilised in continuous-flow microchannel (30-50 ?m dia.) reactors with hierarchical pore structure (4 cm3/g total pore volume) enabled quantitative, full and rapid transesterification of neopentylglycol with ethyl acetate in a biphasic 50/50 % system in less than one minute. MsAcT was...
journal article 2016
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Gorczak, N. (author), Renaud, N. (author), Galan, E. (author), Eelkema, R. (author), Siebbeles, L.D.A. (author), Grozema, F.C. (author)
Quantum interference is a well-known phenomenon that dictates charge transport properties of single molecule junctions. However, reports on quantum interference in donor-bridge-acceptor molecules are scarce. This might be due to the difficulties in meeting the conditions for the presence of quantum interference in a donor-bridge-acceptor system....
journal article 2016
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Castellanos Ortega, S. (author), Kapteijn, F. (author), Gascon Sabate, J. (author)
The ability of modulating the properties of metal–organic frameworks (MOF) on demand by external light-stimuli is a most appealing pathway to enhance their performance in storage and separation and to render novel advanced applications. Photoswitchable linkers of different nature have been inserted in several MOF structures either as integral...
journal article 2016
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Dolinska, J. (author), Chidambaram, A. (author), Adamkiewicz, W. (author), Estili, M. (author), Lisowski, W. (author), Iwan, M. (author), Palys, B. (author), Sudholter, E.J.R. (author), Marken, F. (author), Opallo, M. (author), Rassaei, L. (author)
Porous carbon nanohybrids are promising materials as high-performance electrodes for both sensing and energy conversion applications. This is mainly due to their high specific surface area and specific physicochemical properties. Here, new porous nanohybrid materials are developed based on exfoliated MoS2 nanopetals and either negatively charged...
journal article 2016
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Yarulina, I. (author), Goetze, J. (author), Gücüyener, C. (author), Van Thiel, L. (author), Dikhtiarenko, A. (author), Ruiz-Martinez, J. (author), Weckhuysen, B.M. (author), Gascon, J. (author), Kapteijn, F. (author)
A systematic study of the effect of physicochemical properties affecting catalyst deactivation, overall olefin selectivity and ethylene/propylene ratio during the methanol-to-olefins (MTO) reaction is presented for two zeolites with the DDR topology, namely Sigma-1 and ZSM-58. Both catalysts show high selectivity towards light olefins and...
journal article 2016
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Vita, F. (author), Hegde, M. (author), Portale, G. (author), Bras, W. (author), Ferrero, C. (author), Samulski, E.T. (author), Francescangeli, O. (author), Dingemans, T. (author)
We report the structural characterization of the nematic phase of 2,6-biphenyl naphthalene (PPNPP). This lath-like all-aromatic mesogen provides a valuable benchmark for classical theories of nematic order. PPNPP exhibits a very high temperature nematic phase (417–489 °C) above an enantiotropic smectic A phase. X-ray diffraction reveals a...
journal article 2016
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Markey, K. (author), Putzeys, T. (author), Horcajada, P. (author), Devic, T. (author), Guillou, N. (author), Wübbenhorst, M. (author), Van Cleuvenbergen, S. (author), Verbiest, T. (author), De Vos, D.E. (author), Van der Veen, M.A. (author)
Polar metal–organic frameworks have potential applications as functional non-linear optical, piezoelectric, pyroelectric and ferroelectric materials. Using second harmonic generation microscopy we found that fluoride doping of the microporous iron(III) terephthalate MOF MIL-53(Fe) induces a polar organization in its structure, which was not...
journal article 2016
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Galán, E. (author), Perrin, M.L. (author), Lutz, M. (author), Van der Zant, H.S.J. (author), Grozema, F.C. (author), Eelkema, R. (author)
We have described the synthesis of novel biphenylethane-based wires for molecular electronics. Exceptional single-molecule diode behavior was predicted for unsymmetrically substituted biphenylethane derivatives, synthesized here using the so far unexplored unsymmetrically substituted 1,2-bis(4-bromophenyl)ethanes as key intermediates, which were...
journal article 2016
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Island, J.O. (author), Kuc, A. (author), Diependaal, E.H. (author), Bratschitsch, R. (author), Van der Zant, H.S.J. (author), Heine, T. (author), Castellanos-Gomez, A. (author)
We present photoluminescence (PL) spectroscopy measurements of single-layer MoSe2 as a function of uniform uniaxial strain. A simple clamping and bending method is described that allows for application of uniaxial strain to layered, 2D materials with strains up to 1.1% without slippage. Using this technique, we find that the electronic band gap...
journal article 2016
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Sachdeva, S. (author), Pustovarenko, A. (author), Sudhölter, E.J.R. (author), Kapteijn, F. (author), De Smet, L.C.P.M. (author), Gascon, J. (author)
A study of a copper-based metal–organic framework (MOF) synthesized by an electrochemical route is presented. Morphological and adsorption properties of the MOF synthesized as bulk powder and on supported copper surfaces were investigated. Differences in these properties and structural refinement studies indicate that when 4,4?,4??-s-triazine-2...
journal article 2016
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Valero-Romero, M.J. (author), Sartipi, S. (author), Sun, X. (author), Rodríguez-Mirasol, J. (author), Cordero, T. (author), Kapteijn, F. (author), Gascon, J. (author)
Mesoporous H-ZSM-5–carbon composites, prepared via tetrapropylammonium hydroxide (TPAOH) post treatment of H-ZSM-5 followed by deposition of pyrolytic carbon, have been used as the support for the preparation of Co-based Fischer–Tropsch catalysts. The resulting catalysts display an improved performance during Fischer–Tropsch synthesis (FTS),...
journal article 2016
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Zadpoor, A.A. (author)
The emerging concept of mechanical meta-materials has received increasing attention during the last few years partially due to the advances in additive manufacturing techniques that have enabled fabricating materials with arbitrarily complex micro/nano-architectures. The rationally designed micro/nano-architecture of mechanical meta-materials...
journal article 2016
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Tang, K. (author), Besseling, N.A.M. (author)
This article presents a study of layer-by-layer (LbL) formation of poly-electrolyte multilayers (PEMs). Upon increasing ionic strength LbL growth patterns vary from linear for the lowest salt concentrations ([NaCl] = 0, 0.001, and 0.01 M) to exponential (for [NaCl] = 0.5 and 1 M). The slope of the linear growth at the lowest ionic strengths...
journal article 2015
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Boukany, P.E. (author), Wang, S.Q. (author), Ravindranath, S. (author), James Lee, L.J. (author)
Recent shear experiments in well-entangled polymer solutions demonstrated that interfacial wall slip is the only source of shear rate loss and there is no evidence of shear banding in the micron scale gap. In this work, we experimentally elucidate how molecular parameters such as slip length, b, influence shear inhomogeneity of entangled...
journal article 2015
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Al-Kutubi, H. (author), Rassaei, L. (author), Olthuis, W. (author), Nelson, G.W. (author), Foord, J.S. (author), Holdway, P. (author), Carta, M. (author), Malpass-Evans, R. (author), McKeown, N.B. (author), Tsang, S.C. (author), Castaing, R. (author), Forder, T.R. (author), Jones, M.D. (author), He, D. (author), Marken, F. (author)
The highly rigid molecular structure of Polymers of Intrinsic Microporosity (PIM) – associated with a high thermolysis threshold – combined with the possibility to fill intrinsic micropores allows the direct “one-step” templated conversion of metal nitrates into nano-structured metal oxides. This is demonstrated here with PIM-EA-TB and with PIM...
journal article 2015
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