Correspondence, 13-31 August 1844 Letter. From Bunzen.
0000 - Gale Group | NCCO BritishPolitics
Stuart R. Batten, Neil R. Champness,
... 8950-8958), Online publication date: 14-Sep-2021. Bunzen H (2021) Chemical Stability of Metal‐organic Frameworks ... von Nidda H, Jirák D, Kerl K and Bunzen H (2020) In Vitro Studies of Fe 3 ...
Tópico(s): Polyoxometalates: Synthesis and Applications
2016 - Royal Society | Philosophical Transactions of the Royal Society A Mathematical Physical and Engineering Sciences
Correspondence, 13-31 August 1844 Letter. From Bunzen.
0000 - Gale Group | NCCO BritishPolitics
Karsten Heinz, Sven M. J. Rogge, Andreas Kalytta‐Mewes, Dirk Volkmer, Hana Bunzen,
Pores as high-pressure containers: MOFs with a flexible pore opening for long-term gas storage under ambient conditions in air.
Tópico(s): Enhanced Oil Recovery Techniques
2023 - Royal Society of Chemistry | Inorganic Chemistry Frontiers
... Diplomatic Despatches.: Volume 428 Letter. From M. De Bunzen. To Earl of Rosebery K. G. Tokio.
0000 - Gale Group | NCCO AsiaWest
Produção Nacional
Revisado por pares
Johannes W. M. Osterrieth, James Rampersad, David G. Madden, Nakul Rampal, Luka Skorić, Bethany Connolly, Mark D. Allendorf, Vitalie Stavila, Jonathan L. Snider, Rob Ameloot, João Marreiros, Conchi O. Ania, Diana C. S. Azevedo, Enrique Vilarrasa‐García, Bianca Ferreira dos Santos, Xian‐He Bu, Ze Chang, Hana Bunzen, Neil R. Champness, Sarah L. Griffin, Banglin Chen, Rui‐Biao Lin, Benoît Coasne, Seth M. Cohen, Jessica C. Moreton, Yamil J. Colón, Linjiang Chen, Rob Clowes, François‐Xavier Coudert, Yong Cui, Bang Hou, Deanna M. D’Alessandro, Patrick W. Doheny, Mircea Dincă, Chenyue Sun, Christian J. Doonan, Michael T. Huxley, Jack D. Evans, Paolo Falcaro, Raffaele Riccò, Omar K. Farha, Karam B. Idrees, Timur İslamoğlu, Pingyun Feng, Huajun Yang, Ross S. Forgan, Dominic Bara, Shuhei Furukawa, Eli Sanchez, Jorge Gascón, Selvedin Telalović, Sujit K. Ghosh, Soumya Mukherjee, M. E. Hill, Muhammed Munir Sadiq, Patricia Horcajada, Pablo Salcedo‐Abraira, Katsumi Kaneko, Radovan Kukobat, Jeff Kenvin, Seda Keskın, Susumu Kitagawa, Ken‐ichi Otake, Ryan P. Lively, Stephen J. A. DeWitt, Philip L. Llewellyn, Bettina V. Lotsch, Sebastian T. Emmerling, Alexander M. Pütz, Carlos Martí‐Gastaldo, Natalia M. Padial, Javier García‐Martínez, Noemi Linares, Daniel Maspoch, Jose A. Suárez del Pino, Peyman Z. Moghadam, Rama Oktavian, Russell E. Morris, Paul Wheatley, Jorge A. R. Navarro, Camille Petit, David Danaci, Matthew J. Rosseinsky, Alexandros P. Katsoulidis, Martin Schröder, Xue Han, Sihai Yang⧫, Christian Serre, Georges Mouchaham, David S. Sholl, Raghuram Thyagarajan, Daniel W. Siderius, Randall Q. Snurr, Rebecca B. Goncalves, Shane G. Telfer, Seok J. Lee, Valeska P. Ting, Jemma Rowlandson, Takashi Uemura, Tomoya Iiyuka, Monique A. Van Der Veen, Davide Rega, Véronique Van Speybroeck, Sven M. J. Rogge, Aran Lamaire, Krista S. Walton, Lukas W. Bingel, Stefan Wuttke, Jacopo Andreo, Omar M. Yaghi, Bing Zhang, Cafer T. Yavuz, Thien S. Nguyen, Félix Zamora, Carmen Montoro, Hong‐Cai Zhou, Angelo Kirchon, David Fairen‐Jimenez,
Porosity and surface area analysis play a prominent role in modern materials science. At the heart of this sits the Brunauer-Emmett-Teller (BET) theory, which has been a remarkably successful contribution to the field of materials science. The BET method was developed in the 1930s for open surfaces but is now the most widely used metric for the estimation of surface areas of micro- and mesoporous materials. Despite its widespread use, the calculation of BET surface areas causes a spread in reported ...
Tópico(s): Catalytic Processes in Materials Science
2022 - | Advanced Materials
Diagnostics is an important part of medical practice. The information required for diagnosis is typically collected by performing diagnostic tests, some of which include imaging. Magnetic resonance imaging (MRI) is one of the most widely used and effective imaging techniques. To improve the sensitivity and specificity of MRI, contrast agents are used. In this review, the usage of metal–organic frameworks (MOFs) and composite materials based on them as contrast agents for MRI is discussed. MOFs are ...
Tópico(s): Advanced MRI Techniques and Applications
2022 - American Chemical Society | ACS Applied Materials & Interfaces
Claire L. Hobday, Simon Krause, Sven M. J. Rogge, Jack D. Evans, Hana Bunzen,
Miniaturization is a key aspect of materials science. Owing to the increase in quality experimental and computational tools available to researchers, it has become clear that the crystal size and morphology of porous framework materials, including metal-organic frameworks and covalent organic frameworks, play a vital role in defining the physicochemical behaviour of these materials. However, given the multiscale and multidisciplinary challenges associated with establishing how crystal size and morphology ...
Tópico(s): Membrane Separation and Gas Transport
2021 - Frontiers Media | Frontiers in Chemistry
Abstract Structural variety, tunable porosity and opportunities for functionalization make metal‐organic frameworks (MOFs) promising materials for applications in medicine as drug delivery systems. In this minireview, an overview of chemical stability of MOF nanocarriers at simulated body conditions is presented. Parameters such as a choice of buffer, pH value, nanoparticle size or surface modification are discussed, as well as analytical methods and approaches suitable to determine the material ...
Tópico(s): Dendrimers and Hyperbranched Polymers
2021 - Wiley | ChemNanoMat
Marthe Sönksen, Kornelius Kerl, Hana Bunzen,
Abstract Despite having a rich history as a poison, arsenic and its compounds have also gained a great reputation as promising anticancer drugs. As a pioneer, arsenic trioxide has been approved for the treatment of acute promyelocytic leukemia. Many in vitro studies suggested that arsenic trioxide could also be used in the treatment of solid tumors. However, the transition from bench to bedside turned out to be challenging, especially in terms of the drug bioavailability and concentration reaching ...
Tópico(s): Advanced biosensing and bioanalysis techniques
2021 - Wiley | Medicinal Research Reviews
Dardan Ukaj, Hana Bunzen, Jan Berger, Gregor Kieslich, Roland A. Fischer,
Electrically conductive metal–organic frameworks (MOFs) exhibit a large potential as working medium in next-generation electronic devices where electronic transport is paired with one or more other physicochemical properties. An important pathway in introducing electronic transport in MOFs is the postsynthetic incorporation of guest molecules in the porous host structures, where resulting host–guest interactions facilitate the creation of charge transport pathways. Here, we report the in-depth analysis ...
Tópico(s): Magnetism in coordination complexes
2021 - American Chemical Society | Chemistry of Materials
Jennifer Schnabel, Romy Ettlinger, Hana Bunzen,
Abstract Although arsenic and its compounds are mainly known as a poison, they also found applications as drugs in medicine. However, their distribution in a therapeutic dose is often problematic due to their high toxicity. One possibility how to address this issue is utilizing drug‐delivery systems. Herein, we report on a metal‐organic framework (MOF) called Zn‐MOF‐74, which comprises Zn(II) ions and 2,5‐dihydroxybenzene‐1,4‐dicarboxylate ligands, as a drug nanocarrier of arsenic trioxide. We synthetized ...
Tópico(s): Nanoparticle-Based Drug Delivery
2020 - Wiley | ChemNanoMat
Ali Javed, Ina Strauß, Hana Bunzen, Jürgen Caro, Michael Tiemann,
Large Co-MOF-74 crystals of a few hundred micrometers were prepared by solvothermal synthesis, and their structure and morphology were characterized by scanning electron microscopy (SEM), IR, and Raman spectroscopy. The hydrothermal stability of the material up to 60 °C at 93% relative humidity was verified by temperature-dependent XRD. Proton conductivity was studied by impedance spectroscopy, using a single crystal. By varying the relative humidity (70–95%), temperature (21–60 °C), and orientation ...
Tópico(s): Fuel Cells and Related Materials
2020 - Multidisciplinary Digital Publishing Institute | Nanomaterials
Romy Ettlinger, Natalia Moreno, Natalia Ziółkowska, Aladin Ullrich, Hans‐Albrecht Krug von Nidda, Daniel Jirák, Kornelius Kerl, Hana Bunzen,
Abstract Theragnostics represent a combination of therapy and diagnosis within one system. Herein, Fe 3 O 4 ‐ZIF‐8 core–shell nanoparticles are developed and suggested as candidates for theragnostic applications in cancer treatment. A drug loaded metal–organic framework ZIF‐8 (zeolitic imidazolate framework‐8) represents the therapeutic tool, while the Fe 3 O 4 core is included to enable the material visualization by magnetic resonance imaging (MRI). A reliable synthesis of Fe 3 O 4 ‐ZIF‐8 core–shell ...
Tópico(s): Nanoparticle-Based Drug Delivery
2020 - Wiley | Particle & Particle Systems Characterization
Werner R. Heinz, Iker Agirrezabal-Tellería, Raphael Junk, Jan Berger, Junjun Wang, Dmitry Sharapa, Miryam Gil-Calvo, Ignacio Luz, Mustapha Soukri, Felix Studt, Yuemin Wang, Christof Wöll, Hana Bunzen, Markus Drees, Roland A. Fischer,
A methodology is introduced for controlled postsynthetic thermal defect engineering (TDE) of precious group metal-organic frameworks (PGM-MOFs). The case study is based on the Ru/Rh analogues of the archetypical structure [Cu3(BTC)2] (HKUST-1; BTC = 1,3,5-benzenetricarboxylate). Quantitative monitoring of the TDE process and extensive characterization of the samples employing a complementary set of analytical and spectroscopic techniques reveal that the compositionally very complex TDE-MOF materials result ...
Tópico(s): X-ray Diffraction in Crystallography
2020 - American Chemical Society | ACS Applied Materials & Interfaces
M. Uhl, Jonas K. H. Fischer, Pit Sippel, Hana Bunzen, P. Lunkenheimer, Dirk Volkmer, A. Loidl,
In the present work, we employ broadband dielectric spectroscopy to study the molecular dynamics of the prototypical glass former glycerol confined in two microporous zeolitic imidazolate frameworks (ZIF-8 and ZIF-11) with well-defined pore diameters of 1.16 and 1.46 nm, respectively. The spectra reveal information on the modified α relaxation of the confined supercooled liquid, whose temperature dependence exhibits clear deviations from the typical super-Arrhenius temperature dependence of the bulk ...
Tópico(s): Solid-state spectroscopy and crystallography
2019 - American Institute of Physics | The Journal of Chemical Physics
Romy Ettlinger, Natalia Moreno, Dirk Volkmer, Kornelius Kerl, Hana Bunzen,
Abstract Previous results revealed that arsenic trioxide might be used as promising therapeutic agent for the treatment of some solid tumours as atypical teratoid rhabdoid tumours (ATRT). However, in order to become an approved drug for solid tumour treatment, the active formulation has to get more efficient and feasible—but at the same time less toxic. One of the possibilities to achieve this dichotomy is to use nanomedicine tools. Herein, we report on the Zn‐based metal–organic framework ZIF‐8 ( ...
Tópico(s): Multicomponent Synthesis of Heterocycles
2019 - Wiley | Chemistry - A European Journal
Romy Ettlinger, Marthe Sönksen, Monika Graf, Natalia Moreno, Dmytro Denysenko, Dirk Volkmer, Kornelius Kerl, Hana Bunzen,
As 2 O 3 was introduced as an anion into MOF nanoparticles via a postsynthetic ligand exchange; material cytotoxicity was investigated in vitro .
Tópico(s): Nanoplatforms for cancer theranostics
2018 - Royal Society of Chemistry | Journal of Materials Chemistry B
Hana Bunzen, Ali Javed, Danielle Klawinski, A. Lamp, Maciej Grzywa, Andreas Kalytta‐Mewes, Michael Tiemann, Hans‐Albrecht Krug von Nidda, Thorsten Wagner, Dirk Volkmer,
Herein we present a new proton-conducting iron(II) metal–organic framework (MOF) of an unusual structure formed by chains of alternating bistriazolate-p-benzoquinone anions and iron(II) cations with four axially coordinated water molecules. These chains assemble via π–π stacking between the aromatic units to form a three-dimensional grid-like network with channel pores filled with water molecules. The material was structurally characterized by single-crystal XRD analysis, and its water and thermal ...
Tópico(s): Advanced battery technologies research
2018 - American Chemical Society | ACS Applied Nano Materials
Hana Bunzen, Felicitas Kolbe, Andreas Kalytta‐Mewes, Germán Sastre, Eike Brunner, Dirk Volkmer,
One of the main problems of gas storage in porous materials is that many molecules of interest adsorb too weakly to be retained effectively. To enhance gas storage in metal–organic frameworks (MOFs), we propose the use of kinetic trapping, i.e., a process where the guest gas is captured in the voids at loading conditions and not released immediately at normal conditions. In this approach, the diffusion-limiting pore size and the framework flexibility have to be matched to the gas, requiring flexible ...
Tópico(s): Lanthanide and Transition Metal Complexes
2018 - American Chemical Society | Journal of the American Chemical Society
da Silva, Francisco Giovanni David Vieira,
Tópico(s): Linguistics and Language Studies
2016 - | Revista Linguagem & Ensino
Hana Bunzen, Maciej Grzywa, Manuel Hambach, Sebastian Spirkl, Dirk Volkmer,
Scaling down the size of metal–organic framework (MOF) particles is a challenging but important task for extending the spectrum of potential MOF applications. Herein, we describe downsizing particles of MFU-4, a benzobistriazolate-based Zn(II)-MOF, which can be prepared by either solvothermal or microwave-assisted synthesis. We report on combining various synthetic strategies leading to a production of nanosized MOF crystals of well-defined sizes and shape. Our approaches include varying reaction ...
Tópico(s): Dendrimers and Hyperbranched Polymers
2016 - American Chemical Society | Crystal Growth & Design
Tamas W. Werner, S. Reschke, Hana Bunzen, Hans‐Albrecht Krug von Nidda, J. Deisenhofer, A. Loidl, Dirk Volkmer,
The pentanuclear Co(II) complex [Co5Tp*4(Me2bta)6] containing N-donor ligands (5,6-dimethyl benzotriazolate; Me2bta6) and N-donor capping ligands (tris(3,5-dimethyl-1-pyrazolyl)borate; Tp*) was prepared by a simple and efficient ligand exchange reaction from [Co5Cl4(Me2bta)6] and tetra-n-butyl ammonium tris(3,5-dimethyl-1-pyrazolyl)borate. Compared to the precursor complex [Co5Cl4(Me2bta)6], which contains one Co(II) ion in octahedral and four Co(II) ions in tetrahedral coordination geometry, the title ...
Tópico(s): Organometallic Complex Synthesis and Catalysis
2016 - American Chemical Society | Inorganic Chemistry
Christoph Gütz, Rainer Hovorka, Niklas Struch, Jens Bunzen, Georg Meyer‐Eppler, Zheng‐Wang Qu, Stefan Grimme, Filip Topić, Kari Rissanen, Mario Cetina, Marianne Engeser, Arne Lützen,
A tris(bipyridine) ligand 1 with two BINOL (BINOL = 2,2'-dihydroxy-1,1'-binaphthyl) groups has been prepared in two enantiomerically pure forms. This ligand undergoes completely diastereoselective self-assembly into D2-symmeteric double-stranded trinuclear helicates upon coordination to copper(I) and silver(I) ions and to D3-symmetric triple-stranded trinuclear helicates upon coordination to copper(II), zinc(II), and iron(II) ions as demonstrated by mass spectrometry, NMR and CD spectroscopy in combination ...
Tópico(s): DNA and Nucleic Acid Chemistry
2014 - American Chemical Society | Journal of the American Chemical Society
Hana Bunzen, Nonappa Nonappa, Elina Kalenius, Sami Hietala, Erkki Kolehmainen,
1-2-3 gel! Subcomponent self-assembly is introduced as a new design route towards multistimuli-responsive metallogels. It offers a rapid and facile access to supramolecular gels and allows to design smart materials with diverse functional and structural properties by simply exchanging one (or more) of the components. Herein, the exchange of the metal ions is emphasized (see scheme).
Tópico(s): Supramolecular Chemistry and Complexes
2013 - Wiley | Chemistry - A European Journal
Hana Bunzen, Erkki Kolehmainen,
In this work, a steroidal gelator containing an imine bond was synthesized, and its gelation behavior as well as a sensitivity of its gels towards acids was investigated. It was shown that the gels were acid-responsive, and that the gelator molecules could be prepared either by a conventional synthesis or directly in situ during the gel forming process. The gels prepared by both methods were studied and it was found that they had very similar macro- and microscopic properties. Furthermore, the possibility ...
Tópico(s): Photochromic and Fluorescence Chemistry
2013 - Multidisciplinary Digital Publishing Institute | Molecules
Muxin Han, Reent Michel, Bice He, Yu‐Sheng Chen, Dietmar Stalke, Michael John, Guido H. Clever,
... 16, 11792. 27 27aT. Weilandt, U. Kiehne, J. Bunzen, G. Schnakenburg, A. Lützen, Chem. Eur. J. 2010, ...
Tópico(s): Molecular Sensors and Ion Detection
2012 - Wiley | Angewandte Chemie International Edition
Jens Bunzen, Junji Iwasa, Pia Bonakdarzadeh, Eri Numata, Kari Rissanen, Sota Sato, Makoto Fujita,
Critical structural switch: A small initial difference in the angle within bidentate ligands (see scheme) is amplified into an incommensurable difference in the resultant structures (M12L24 or M24L48). This molecular-level emergent behavior was predicted from the empirical threshold of the ligand bend angle, determined by a ligand mixing experiment, for the critical M12L24/M24L48 switchover.
Tópico(s): Polyoxometalates: Synthesis and Applications
2012 - Wiley | Angewandte Chemie International Edition
Jens Bunzen, Junji Iwasa, Pia Bonakdarzadeh, Eri Numata, Kari Rissanen, Sota Sato, Makoto Fujita,
Entschiedener Übergang: Ein kleiner Unterschied im Winkel eines zweizähnigen Liganden (siehe Schema) führt zur Bildung inkommensurabler Komplexstrukturen (M12L24 und M24L48). Der M12L24/M24L48-Wechsel wurde aus dem empirischen Grenzwert des Ligandwinkels vorhergesagt, der durch ein Ligandenmischexperiment bestimmt wurde. Detailed facts of importance to specialist readers are published as "Supporting Information". Such documents are peer-reviewed, but not copy-edited or typeset. They are made available ...
Tópico(s): Magnetism in coordination complexes
2012 - Wiley | Angewandte Chemie
Produção Nacional
Revisado por pares
O objetivo do presente trabalho é realizar uma breve reflexão sobre o surgimento e a ascensão da disciplina escolar Português, responsável pelo ensino formal da língua materna nas escolas. Nesse sentido, destacaremos discussões sobre a fabricação de um espaço/tempo para que os alunos aprendam a se apropriar dos saberes escolares e metadiscursos sobre a língua escrita. Ao nos basear nos estudos sobre as disciplinas escolares, apresentamosuma interpretação sobre o surgimento da disciplina escolar ...
Tópico(s): Second Language Learning and Teaching
2011 - Editora Universitária Champagnat - PUCPRESS | Revista Diálogo Educacional