Article
Chemistry, Multidisciplinary
Daniel Baranowski, Iulia Cojocariu, Alessandro Sala, Cristina Africh, Giovanni Comelli, Luca Schio, Massimo Tormen, Luca Floreano, Vitaliy Feyer, Claus M. Schneider
Summary: On-surface chemistry allows for the miniaturization of functional devices, with porphyrins being promising building blocks for exploring advanced nanoarchitecture. Covalently connecting molecular units can result in more stable molecular materials with improved charge transfer properties. The synthesis and properties of a covalent molecular network composed of interconnected constituents derived from halogenated nickel tetraphenylporphyrin on Au(111) are addressed in this study. The pi-extended two-dimensional material exhibits dispersive electronic features, while the functional Ni cores retain their single-active site character. The high robustness of transition metal cores provided by bottom-up constructed covalent nanomeshes opens up new possibilities.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Peter Knecht, Joachim Reichert, Peter S. Deimel, Peter Feulner, Felix Haag, Francesco Allegretti, Manuela Garnica, Martin Schwarz, Willi Auwaerter, Paul T. P. Ryan, Tien-Lin Lee, David A. Duncan, Ari Paavo Seitsonen, Johannes V. Barth, Anthoula C. Papageorgiou
Summary: This study investigates the binding of CO to Ru-porphyrins on an Ag(111) substrate, demonstrating that substituents can regulate the interfacial conformational adaptability, either promoting or obstructing the uptake of axial CO adducts. The research combines real-space visualization, manipulation experiments, and density-functional-theory calculations to provide insights into the functional interface.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Geochemistry & Geophysics
Shawn L. Riechers, Eugene S. Ilton, Odeta Qafoku, Yingge Du, Sebastien N. Kerisit
Summary: This study quantifies the effects of the nature of the mineral substrate and solution chemistry on the competitive heterogeneous growth between cobalt carbonate and cobalt hydroxide. The findings highlight the importance of lattice mismatch, heterogeneous nucleation barriers, and rates of heterogenous growth in influencing the outcome of geochemical reactions.
Article
Materials Science, Multidisciplinary
Sebastian Dahle, John Meuthen, Rene Gustus, Alexandra Prowald, Wolfgang Vioel, Wolfgang Maus-Friedrichs
Summary: The self-assembling films were used on pine wood substrates to alter surface wettability, with monodisperse polystyrene spheres deposited onto the substrate via dip coating. The resulting film had a polycrystalline FCC-like structure with typical domain sizes of 5-15 single spheres. Functionalization of this self-assembled coating through O-2 plasma treatment introduced hydroxyl and carbonyl groups, resulting in superhydrophilic behavior.
Article
Materials Science, Multidisciplinary
Chaitanya Mahajan, Vahid Hasannaeimi, Mayur Pole, Elizabeth Kautz, Bharat Gwalani, Sundeep Mukherjee
Summary: The effect of chemistry change on corrosion mechanisms and passive film characteristics of model Ni-P and Co-P metallic glass coatings on mild steel was investigated. Increasing phosphorus content enhanced corrosion resistance, with the presence of hypophosphite and phosphate anions observed on the corroded surfaces. Enrichment of phosphorus in the passive layer facilitated the restoration of the protective hypophosphite anion layer during dissolution. A correlation between electronic structure and corrosion resistance was established, as the relative work function increased with higher phosphorus content.
Article
Chemistry, Applied
Wugen Huang, Jun Cai, Jun Hu, Junfa Zhu, Fan Yang, Xinhe Bao
Summary: The atomic structures and electronic properties of Cr-doped ZnO(10 (1) over bar0) surfaces were investigated using a combined approach of STM and XPS, revealing the presence of isolated Cr atoms or Cr substituting Zn atoms. Thermal treatments above 600 K facilitated the redistribution of Cr atoms into the ZnO lattice, indicating a strong interaction between Cr and ZnO. Adsorption of CO at 78 K showed no preference for Cr3+ sites on the ZnO surface lattice, while re-dispersion of Cr atoms caused a significant band bending and negative XPS peak shifts.
CHINESE JOURNAL OF CATALYSIS
(2021)
Article
Biochemistry & Molecular Biology
Weronika Sofinska-Chmiel, Marta Goliszek, Marek Drewniak, Aldona Nowicka, Marcin Kusmierz, Agnieszka Adamczuk, Paulina Malinowska, Ryszard Maciejewski, Malgorzata Tatarczak-Michalewska, Eliza Blicharska
Summary: Determining the composition of kidney stones is crucial for treatment plans, understanding causes, and preventing recurrence. This study investigated the shape and chemical makeup of multicomponent kidney stones using techniques such as FTIR, XRD, and electron microscopy with the EDX detector. XPS was also used to gain a better understanding of the chemical structure, and FTIR microscopy was used for chemical mapping. This comprehensive examination of nephrolithiasis was made possible by utilizing modern research methods, particularly spectroscopic techniques.
Article
Chemistry, Physical
Xu Li, Keito Horiba, Ryoichi Sugiura, Tomoaki Yamada, Junji Yuhara
Summary: In this study, three different precursor Ba-O films on Pt(1 1 1) were characterized and oxide crystalline approximant (OCA) and oxide quasicrystal (OQC) films were prepared via Ti deposition and annealing. Analysis revealed phase transformation likely follows Ti reduction and Ba oxidation, leading to a change in surface atomic density. Structural models proposed for the OCA and OQC films involve cluster tiling of Ba atoms.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Terry R. Walton
Summary: This study developed a non-destructive method for measuring the electrodeposited thickness of gold on high-gold alloys, and found a linear relationship between gold thickness and plating time between 20 and 220 minutes.
Article
Chemistry, Physical
Bruno Robert, Valerie Flaud, Raphael Escalier, Ahmad Mehdi, Caroline Vigreux
Summary: The functionalization process of amorphous Ge25Se55Te20 chalcogenide thin films with three organosilanes has been studied by X-ray photoelectron spectrometry. The study reveals the formation of new oxidized environments after functionalization, indicating the covalent anchorage of organosilane precursors through the formation of Te-O-Si groups.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
G. T. Chavan, Anuja Yadav, B. Y. Fugare, Nanasaheb M. Shinde, M. S. Tamboli, S. S. Kamble, A. Sikora, J. Warycha, B. J. Lokhande, Seok-Won Kang, Ahyun Kim, Chan-Wook Jeon
Summary: This study explores the potential application of Co1-xCuxS/CoCuS thin films as materials for supercapacitors. The as-deposited thin films were characterized using various techniques. The results demonstrate that the sample-C-3 (x = 0.075) is suitable for energy storage applications, showing excellent supercapacitive performance and cycling stability, which suggests its potential as an alternative for efficient energy storage devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Jindong Ren, Matthias Freitag, Yuxiang Gao, Peter Bellotti, Mowpriya Das, Bertram Schulze Lammers, Harry Monig, Yuyang Zhang, Constantin G. Daniliuc, Shixuan Du, Harald Fuchs, Frank Glorius
Summary: This study demonstrated the reversible self-assembly of cyclohexyl cyclic (alkyl)(amino)-carbenes and the importance of cyCAAC-surface interactions. By analyzing the molecular surface geometry and exploring various surfaces, the study deepened our understanding of cyCAAC binding mode and provided insights for catalysis, biosensor design, and surface functionalization.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Zhiyu Yi, Le Lin, Xuda Luo, Yanxiao Ning, Qiang Fu
Summary: Mixed oxides are important in heterogeneous catalytic processes, and understanding the interaction between different oxide components is crucial for synthesizing high-performance catalysts. This study introduces trace amounts of metallic Zn species into chromium oxide nanostructures and investigates their impact on the reducibility of the oxides. The results show that the addition of Zn can significantly lower the reduction temperature of the Cr oxides and enhance their reducibility.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Applied
Zuzana Sirillova, Janka Hradilova, Michal Pech, Silvie Svarcova, Petr Bezdicka, Vilem Nedela, David Hradil
Summary: In order to study the use of gold nanoparticles in miniature painting, seven 19th century portraits were examined, and the presence of Purple of Cassius pigment was confirmed in four paintings. The particles were characterized using X-ray powder diffraction and environmental scanning electron microscopy, with an average size of 8-14 nm. Replication of the pigment preparation in the laboratory yielded a similar pigment, providing new insights into the use of Purple of Cassius in portrait miniatures.
Article
Chemistry, Physical
Amanda R. Haines, John C. Hemminger
Summary: This study investigates the stability of CuOx and TiO2 nanoparticles on a HOPG substrate, revealing that reducing potentials can cause mobility and agglomeration of TiO2 nanoparticles, affecting their diameter and structure. These results highlight the importance of stability studies in understanding degradation mechanisms of model electrochemical catalysts.
Review
Chemistry, Multidisciplinary
Peter Bellotti, Huan-Ming Huang, Teresa Faber, Frank Glorius
Summary: The emergence of modern photocatalysis has revolutionized late-stage C-H functionalization, offering unprecedented regio- and chemoselectivities. This Review focuses on the strategies of small-molecule drugs, agrochemicals, and natural products, highlighting the main mechanistic scenarios and comparing established ionic chemistry and photocatalyzed radical-based manifolds. The authors aim to provide a comprehensive overview of the current state-of-the-art and address the challenges and future directions in this field.
Article
Biochemistry & Molecular Biology
Yanjun Zheng, Tristan Wegner, Daniele Di Iorio, Marco Pierau, Frank Glorius, Seraphine V. Wegner
Summary: The nongenetic modification of cell membranes with proteins is a straightforward method in cellular engineering. A cholesterol analogue called CHIM-NTA has been developed for specific membrane immobilization of polyhistidine-tagged proteins, particularly in the liquid-ordered (Lo) domains. It can integrate into phase-separated giant unilamellar vesicles (GUVs) and live cell membranes, enabling the nongenetic modification of cell surfaces with proteins.
ACS CHEMICAL BIOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Yujie Liang, Fritz Paulus, Constantin G. Daniliuc, Frank Glorius
Summary: We report a BF3-catalyzed [2 + 2] cycloaddition reaction between aldehydes and bicyclo[1.1.0]butanes (BCBs) to access polysubstituted 2-oxabicyclo[2.1.1]hexanes. A new BCB containing an acyl pyrazole group was discovered, which not only facilitates the reactions but also allows for diverse downstream transformations. Additionally, aryl and vinyl epoxides can be used as substrates that undergo cycloaddition with BCBs after in situ rearrangement to aldehydes. These results will promote the exploration of complex sp(3)-rich bicyclic frameworks and BCB-based cycloaddition chemistry.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Biochemistry & Molecular Biology
Maurice Dellin, Ina Rohrbeck, Purva Asrani, Julian A. Schreiber, Nadine Ritter, Frank Glorius, Bernhard Wuensch, Thomas Budde, Louisa Temme, Timo Struenker, Birgit Stallmeyer, Frank Tuettelmann, Sven G. Meuth, Marc Spehr, Johann Matschke, Andrea Steinbicker, Christos Gatsogiannis, Raphael Stoll, Nathalie Strutz-Seebohm, Guiscard Seebohm
Summary: The study identified two binding sites, PS1 and S0, for PI(3,5)P-2 on the KCNQ1/KCNE1 channel, and found that binding of PI(3,5)P-2 to both sites is necessary for stabilizing the channel's open state.
BIOLOGICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Milena Merkel, Amala Elizabeth, Marcus Boeckmann, Harry Moenig, Cornelia Denz, Nikos L. Doltsinis
Summary: The formation of surface relief gratings in thin azopolymeric films was studied. Molecular dynamics simulations were conducted and compared with experimental results. The simulations considered the photoisomerization dynamics and the orientation of the transition dipole moment, while the experiments used a spatial light modulator to illuminate the azopolymer film. It was observed that local heating and movement of molecules led to the formation of valleys, and the polarization of the incident light only had a small effect on the formation of grain-like structures in the valleys.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Akash Kaithal, Himadri Sekhar Sasmal, Subhabrata Dutta, Felix Schafer, Lisa Schlichter, Frank Glorius
Summary: This study reports a catalytic approach to synthesizing cis-selective saturated carbo-and heterocyclic germanium compounds with a 3D framework through the hydrogenation of readily accessible aromatic germanes with a 2D framework. Nishimura's catalyst exhibited the best hydrogenation reactivity, achieving an isolated yield of up to 96%. The synthesized products showed versatile applications in coupling reactions and demonstrated orthogonal reactivity with boranes or silanes, acquiring a three-dimensional structure with high stability.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Roman Kleinmans, Subhabrata Dutta, Kristers Ozols, Huiling Shao, Felix Schafer, Rebecca E. Thielemann, Hok Tsun Chan, Constantin G. Daniliuc, Kendall N. Houk, Frank Glorius
Summary: The ortho-selective intermolecular photocycloaddition of bicyclic aza-arenes is reported, utilizing a strain-release approach. This reaction enables the construction of C-(sp(3))-rich bicyclo-[2.1.1]-hexanes directly connected to N-heteroarenes. Photophysical experiments and DFT calculations reveal the mechanism of this selective intermolecular photocycloaddition.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Nanoscience & Nanotechnology
Florian Bosse, Christian Gutheil, D. Thao Nguyen, Matthias Freitag, Mowpriya Das, Bonnie J. J. Tyler, Thorsten Adolphs, Andreas H. H. Schaefer, Heinrich F. F. Arlinghaus, Frank Glorius, Bart Jan Ravoo
Summary: Planar gold surfaces modified with N-heterocyclic carbene (NHC) were found to be more susceptible to wet chemical etching compared to undecorated areas. The selective decoration of NHCs on gold was achieved by microcontact printing, and the etching behavior could be tuned by changing the concentration of the NHC precursor. Surface patterning was confirmed by time-of-flight secondary-ion mass spectrometry and Kelvin probe force microscopy. The ability to selectively remove gold through surface ligand functionalization enables novel applications of NHCs in materials chemistry and nanofabrication.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Mowpriya Das, Markus Kohlstaedt, Maria Enders, Stephan Burger, Himadri Sekhar Sasmal, Birger Zimmermann, Andreas Schaefer, Bonnie J. Tyler, Heinrich F. Arlinghaus, Ingo Krossing, Uli Wuerfel, Frank Glorius
Summary: This study demonstrates the modification of ITO surface using N-heterocyclic carbenes (NHCs) precursor, IPr-CO2, via spin coating method. The modified ITO electrodes exhibit significantly reduced work function and provide high electron selectivity contacts in organic photovoltaic devices.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Fritz Paulus, Colin Stein, Corinna Heusel, Tobias J. Stoffels, Constantin G. Daniliuc, Frank Glorius
Summary: In this study, a novel three-component 1,2,5-trifunctionalization reaction driven by visible light energy transfer-catalysis was reported. Selective installation of three different functional groups was achieved in one step by utilizing imine-based bifunctional reagents and two distinct alkenes. Mechanistic studies and downstream modifications demonstrated the synthetic utility of the obtained products.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Review
Chemistry, Multidisciplinary
Peter Bellotti, Frank Glorius
Summary: The concept of strain in organic compounds is essential for understanding the synthesis and properties of organic compounds. Recent advancements in strain-release reactions and photocatalysis have opened up new possibilities for creating unique chemical architectures and expanding the field of strain research.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Huamin Wang, Johannes E. Erchinger, Madina Lenz, Subhabrata Dutta, Constantin G. Daniliuc, Frank Glorius
Summary: This study presents a photoredox strategy that enables the high regio- and syn-selective difunctionalization of bicyclo[1.1.0]-butanes (BCBs). By cleaving C-S sigma bonds, sulfur-alkynylation, -alkenylation, and -allylation of BCBs can be achieved under mild conditions, demonstrating the generality of this approach.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Linda Quach, Egy Adhitama, Valentin Goeldner, Ankita Das, Feleke Demelash, Martin Winter, Uwe Karst, Tobias Placke, Frank Glorius
Summary: Film-forming electrolyte additives are crucial for the performance and safety of high-energy-density lithium-ion batteries. This study synthesized derivatives and conducted analyses to investigate the impact of molecular substrate parameters on battery performance. The research aims to enhance the fundamental understanding of influential substrate parameters and guide the design of electrolyte additives for high-energy-density lithium-ion batteries.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Damla Yesilpinar, Martin Vondracek, Patrik Cermak, Harry Monig, Jaromir Kopecek, Ondrej Caha, Karel Carva, Cestmir Drasar, Jan Honolka
Summary: We investigated the effect of low concentrations of iron on the physical properties of SnS van der Waals crystals grown from the melt. Through scanning tunneling microscopy (STM) and photoemission spectroscopy, we studied Fe-induced defects and observed an electron doping effect in the band structure of the native p-type SnS semiconductor. Our results showed that Fe preferentially occupies donor-like interstitial Fe-int sites in close proximity to V-Sn defects along the high-symmetry c-axis of SnS, leading to a reduction of p-type carrier concentrations.
