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515 results on '"van der Boom, Milko E."'

9. Inside Back Cover: Directing the Morphology, Packing, and Properties of Chiral Metal–Organic Frameworks by Cation Exchange (Angew. Chem. Int. Ed. 34/2022)

Author

Nasi, Hadar, primary, Chiara di Gregorio, Maria, additional, Wen, Qiang, additional, Shimon, Linda J. W., additional, Kaplan‐Ashiri, Ifat, additional, Bendikov, Tatyana, additional, Leitus, Gregory, additional, Kazes, Miri, additional, Oron, Dan, additional, Lahav, Michal, additional, and van der Boom, Milko E., additional

Published
2022
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10. Innenrücktitelbild: Directing the Morphology, Packing, and Properties of Chiral Metal–Organic Frameworks by Cation Exchange (Angew. Chem. 34/2022)

Author

Nasi, Hadar, primary, Chiara di Gregorio, Maria, additional, Wen, Qiang, additional, Shimon, Linda J. W., additional, Kaplan‐Ashiri, Ifat, additional, Bendikov, Tatyana, additional, Leitus, Gregory, additional, Kazes, Miri, additional, Oron, Dan, additional, Lahav, Michal, additional, and van der Boom, Milko E., additional

Published
2022
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14. Energy Transport in Dichroic Metallo‐organic Crystals: Selective Inclusion of Spatially Resolved Arrays of Donor and Acceptor Dyes in Different Nanochannels**.

Author

Wen, Qiang, Malik, Naveen, Addadi, Yoseph, Weißenfels, Maren, Singh, Vivek, Shimon, Linda J. W., Lahav, Michal, and van der Boom, Milko E.

Subjects
FLUORESCENCE resonance energy transfer, CRYSTALS, DYES & dyeing
Abstract

In this study, the precise positioning and alignment of arrays of two different guest molecules in a crystalline host matrix has been engineered and resulted in new optically active materials. Sub‐nm differences in the diameters of two types of 1D channels are sufficient for size‐selective inclusion of dyes. Energy transport occurs between the arrays of different dyes that are included in parallel‐positioned nanochannels by Förster resonance energy transfer (FRET). The color of individual micro‐sized crystals are dependent on their relative position under polarized light. This angular‐dependent behavior is a result of the geometrically constrained orientation of the dyes by the crystallographic packing of the host matrix and is concentration dependent. [ABSTRACT FROM AUTHOR]

Published
2023
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20. Strategies for electrooptic film fabrication. Influence of pyrrole-pyridine-based dibranched chromophore architecture on covalent self-assembly, thin-film microstructure, and nonlinear optical response

Author

Facchetti, Antonio, Shukla, Atindra D., Beverina, Luca, Stern, Charlotte E., Van Der Boom, Milko E., Pagani, Giorgio A., Dutta, Pulak, Marks, Tobin J., and Evmenenko, Guennadi

Subjects
Pyrrole -- Chemical properties, Pyrrole -- Atomic properties, Pyridine -- Chemical properties, Pyridine -- Atomic properties, Nuclear magnetic resonance spectroscopy -- Usage, Chemistry
Abstract

Several pyrrole-pyridin-based dibranched, heterocyclic 'push-pull' chromophore systems are synthesized and characterized. NMR and optical spectroscopy define the molecular structures and other physiochemical properties of chromophore monolayers and thin-film characterization emphasizes the importance of the chromophore molecular structure and film growth method on film microstructure and optical/electrooptic response.

Published
2006

21. Electrochromism or Water Splitting in Neutral Aqueous Solutions by a Metallo‐Organic Assembly.

Author

Malik, Naveen, Bendikov, Tatyana, Lahav, Michal, and van der Boom, Milko E.

Subjects
AQUEOUS solutions, ELECTROCHROMIC effect, OXIDATION of water, AQUEOUS electrolytes, PALLADIUM oxides, CATALYSTS
Abstract

Herein, two different functionalities of one metallo‐organic film assembled on the surface of a transparent metal‐oxide electrode are described. Two redox‐active elements, electrochromic iron–polypyridyl complexes and catalytically active palladium centers, operate by applying different potentials in aqueous solutions. The color of the material can be cycled 1500 times from dark purple to colorless by electrochemically addressing the Fe2+/3+ centers at 0.0–1.0 V (vs Ag/Ag+). The differences between the transmittance of these two states is high: ΔT = 52%. Catalytic water oxidation can occur by palladium oxide particles that form in situ by applying a higher potential (1.22–2.0 V vs Ag/Ag+), resulting in the formation of hydrogen and oxygen. The catalyst is active for at least 7 h in an aqueous electrolyte at pH = 6.9, with a Faradaic efficiency of ≈70%. [ABSTRACT FROM AUTHOR]

Published
2022
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22. Chiral and SHG-Active Metal–Organic Frameworks Formed in Solution and on Surfaces: Uniformity, Morphology Control, Oriented Growth, and Postassembly Functionalization

Author

Wen, Qiang, primary, Tenenholtz, Shira, additional, Shimon, Linda J. W., additional, Bar-Elli, Omri, additional, Beck, Lior M., additional, Houben, Lothar, additional, Cohen, Sidney R., additional, Feldman, Yishay, additional, Oron, Dan, additional, Lahav, Michal, additional, and van der Boom, Milko E., additional

Published
2020
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25. Formation of difluoromethylene-arenium complexes by consecutive aryl-CF3 C-C bond activation and C-F bond cleavage

Author

van der Boom, Milko E., Ben-David, Yehoshoa, and Milstein, David

Subjects
Platinum group -- Research, Coordination compounds -- Research, Transition metal compounds -- Research, Chemical bonds -- Research, Chemistry
Abstract

A study on the activation of C-C and C-F bonds through the insertion of platinum group metal complexes in solution reports on the consecutive C-C activation and C-F cleavage in one chemical system. The process involves selective metal insertion into a very strong aryl-CF3 C-C bond followed by reaction of the resulting RhIII-CF3 complex with protonic or Lewis acids to form unique difluoromethylene-arenium complexes by C-F cleavage and C-C bond formation.

Published
1999

28. Unusual Surface Texture, Dimensions and Morphology Variations of Chiral and Single Crystals.

Author

Singh, Vivek, Houben, Lothar, Shimon, Linda J. W., Cohen, Sidney R., Golani, Ofra, Feldman, Yishay, Lahav, Michal, and van der Boom, Milko E.

Subjects
SINGLE crystals, SURFACE texture, CRYSTAL structure, ELECTRON diffraction, MAGNITUDE (Mathematics)
Abstract

We demonstrate here a unique metallo‐organic material where the appearance and the internal crystal structure are in contradiction. The egg‐shaped (ovoid) crystals have a brain‐like texture. Although these micro‐sized crystals are monodispersed; like fingerprints their grainy surfaces are never exactly alike. Remarkably, our X‐ray and electron diffraction studies unexpectedly revealed that these structures are single‐crystals comprising a continuous coordination network of two differently shaped homochiral channels. By using the same building blocks under different reaction conditions, a rare series of crystals have been obtained that are uniquely rounded in their shape. In stark contrast to the brain‐like crystals, these isostructural and monodispersed crystals have a comparatively smooth appearance. The sizes of these crystals vary by several orders of magnitude. [ABSTRACT FROM AUTHOR]

Published
2021
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31. Site affinity effects upon charge injection into siloxane-based monolayer

Author

Zenkina, Olena V., Shukla, Atindra D., and Van Der Boom, Milko E.

Subjects
Siloxanes -- Atomic properties, Siloxanes -- Electric properties, Monomolecular films -- Design and construction, Polarization (Electricity) -- Analysis, Chemicals, plastics and rubber industries
Abstract

Submolecular electrical information is successfully derived by applying element-specific, chemically resolved electrical measurements to a covalently bound stilbazole-based monolayer on a silicon substrate. The pronounced affinity effects are found in response of adjacent atomic sites to external charge injection, accompanied by intramolecular polarization variations.

Published
2006

33. Electrochromic Metallo-Organic Nanoscale Films: Fabrication, Color Range, and Devices

Author

Elool Dov, Neta, Shankar, Sreejith, Cohen, Dana, Bendikov, Tatyana, Rechav, Katya, Shimon, Linda J. W., Lahav, Michal, and van der Boom, Milko E.

Abstract

In this study, we demonstrate a versatile approach for the formation of electrochromic nanoscale assemblies on transparent conductive oxides on both rigid and flexible substrates. Our method is based on the application of alternating spin-coated layers of well-defined metal polypyridyl complexes and a palladium(II) salt to form electrochemically addressable films with a high chromophore density. By varying the central metal ion of the polypyridyl complexes (Os, Ru, and Fe) and their ligands and by mixing these complexes, coatings with a wide range of colors can be achieved. These coatings cover a large area of RGB color space. The coloration intensities of these nanoscale films can be tuned by the number of deposition steps. The materials have very attractive ON/OFF ratios, electrochemical stabilities, and coloration efficiencies. Reversible color-to-colorless and color-to-color transitions were demonstrated, and the films were further integrated into sandwich cells.

Published
2024
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38. Metallic Nanocrystal Ripening on Inorganic Surfaces

Author

Ranjan, Priyadarshi, primary, Kaplan-Ashiri, Ifat, additional, Popovitz-Biro, Ronit, additional, Cohen, Sidney R., additional, Houben, Lothar, additional, Tenne, Reshef, additional, Lahav, Michal, additional, and van der Boom, Milko E., additional

Published
2018
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39. Sorting of Molecular Building Blocks from Solution to Surface

Author

Keisar, Hodaya, primary, de Ruiter, Graham, additional, Velders, Aldrik H., additional, Milko, Petr, additional, Gulino, Antonino, additional, Evmenenko, Guennadi, additional, Shimon, Linda J. W., additional, Diskin-Posner, Yael, additional, Lahav, Michal, additional, and van der Boom, Milko E., additional

Published
2018
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41. Decoration of Inorganic Nanostructures by Metallic Nanoparticles to Induce Fluorescence, Enhance Solubility, and Tune Band Gap

Author

Ranjan, Priyadarshi, primary, Shankar, Sreejith, additional, Popovitz-Biro, Ronit, additional, Cohen, Sidney R., additional, Kaplan-Ashiri, Ifat, additional, Dadosh, Tali, additional, Shimon, Linda J. W., additional, Višić, Bojana, additional, Tenne, Reshef, additional, Lahav, Michal, additional, and van der Boom, Milko E., additional

Published
2018
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42. Tubular Hybrids: A Nanoparticle—Molecular Network

Author

Ranjan, Priyadarshi, primary, Shankar, Sreejith, additional, Popovitz-Biro, Ronit, additional, Cohen, Sidney R., additional, Pinkas, Iddo, additional, Tenne, Reshef, additional, Lahav, Michal, additional, and van der Boom, Milko E., additional

Published
2018
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44. Electrochemical characteristics of a self-propagating molecular-based assembly

Author

Motiei, Leila, Lahav, Michal, Gulino, Antonino, Iron, Mark A., and van der Boom, Milko E.

Subjects
Indium -- Electric properties, Indium -- Chemical properties, Tin compounds -- Electric properties, Tin compounds -- Chemical properties, Oxides -- Electric properties, Oxides -- Chemical properties, Electron transport -- Analysis, Chemicals, plastics and rubber industries
Published
2010

45. Stepwise assembly of coordination-based metal-organic networks

Author

Kaminker, Revital, Motiei, Leila, Gulino, Antonino, Fragala, Ignazio, Shimon, Linda J.W., Evmenenko, Guennadi, Dutta, Pulak, Iron, Mark A., and van der Boom, Milko E.

Subjects
Organometallic compounds -- Structure, Organometallic compounds -- Chemical properties, Palladium -- Chemical properties, Palladium -- Electric properties, Photoelectron spectroscopy -- Usage, Pyridine -- Structure, Pyridine -- Chemical properties, Chemistry
Abstract

Metal-organic networks (MONs) are created by a stepwise solution deposition approach from vinylpyridine-based building blocks and Pd[Cl.sub.2]. The X-ray photoelectron spectroscopy (XPS) elemental composition has shown the formation of a palladium coordination-based network.

Published
2010

46. Self-propagating molecular assemblies as interlayers for efficient inverted bulk-heterojunction solar cells

Author

Motiei, Leila, Yan Yao, Choudhury, Joyanta, He Yan, Marks, Tobin J., van der Boom, Milko E., and Facchetti, Antonio

Subjects
Solar cells -- Composition, Carbonates -- Chemical properties, Cesium -- Chemical properties, Cesium -- Electric properties, Voltage -- Measurement, Electron transport -- Analysis, Solar batteries -- Composition, Chemistry
Abstract

The first application of self-propagating molecule-based assemblies (SPMAs) as efficient electron-transporting layers for inverted organic photovoltaic (OPV) cells is reported. The findings for the dependence of cell response parameters on interlayer thickness could be used to optimize device performance.

Published
2010

47. Long-range through-bond heteronuclear communication in platinum complexes

Author

Zenkina, Olena V., Konstantinovski, Leonid E., Shimon, Linda J.W., Diskin-Posner, Yael, Iron, Mark A., and van der Boom, Milko E.

Subjects
Density functionals -- Analysis, Nuclear magnetic resonance spectroscopy -- Usage, Platinum compounds -- Chemical properties, Platinum compounds -- Structure, Spin coupling -- Analysis, Chemistry
Published
2009

48. Electrochromic behavior of a self-propagating molecule-based assembly

Author

Motiei, Leila, Lahav, Michal, Freeman, Dalia, and van der Boom, Milko E.

Subjects
Indium -- Chemical properties, Indium -- Optical properties, Oxidation-reduction reaction -- Analysis, Polymerization -- Analysis, Tin alloys -- Chemical properties, Tin alloys -- Structure, Tin alloys -- Optical properties, Chemistry
Abstract

A metallo-supramolecular network has undergone reversible redox chemistry on indium-tin oxide (ITO) coated glass substrates with concurrent color change. The switching time, long-term stability, and coloration efficiency are competitive with polymeric materials such as the PEDOT.

Published
2009

49. Self-propagating assembly of a molecular-based multilayer

Author

Motiei, Leila, Altman, Marc, Gupta, Tarkeshwar, Lupo, Fabio, Gulino, Antonino, Evmenenko, Guennadi, Dutta, Pulak, and van der Boom, Milko E.

Subjects
Organometallic compounds -- Chemical properties, Organometallic compounds -- Structure, Osmium -- Chemical properties, Palladium -- Chemical properties, Polyelectrolytes -- Chemical properties, Pyridine -- Chemical properties, Chemistry
Abstract

A hybrid structure consisting of a robust and structurally well-defined polypyridyl osmium complex and palladium precursor are constructed by using an iterative two-step assembly method. The studies have shown that the important characteristics of polyelectrolyte-based films and the molecular self-assembly (SA) are analogous, showing that the rich chemistry of surfaces engineered with molecular-based multilayers are extended to the functions of polyelectrolyte-based films.

Published
2008

50. Assembly of crystalline halogen-bonded materials by physical vapor deposition

Author

Shirman, Tanya, Freeman, Dalia, Posner, Yael Diskin, Feldman, Isai, Facchetti, Antonio, and van der Boom, Milko E.

Subjects
Silicon -- Chemical properties, Dielectric films -- Structure, Thin films -- Structure, Vapor-plating -- Usage, Chemistry
Abstract

The article discusses the properties and growth of the crystalline halogen-bonded thin films that are self-assembled on silicon substrates by the method of physical vapor deposition (PVD). The microstructures of the films are shown to be completely independent of the chemistry of the substrate surface.

Published
2008

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