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, Multidisciplinary
Longfei Yao, Kuo Fu, Xuejuan Wang, Menglu He, Wannian Zhang, Peng-Yu Liu, Yu-Peng He, Guofeng Liu
Summary: The study focuses on the dynamic supramolecular chirality inversion (SMCI), which deepens understanding of chiral transfer and amplification and aids in the development of chiral nanomaterials. The researchers successfully developed a hierarchical coassembly system based on mPAzPCC and various metal ions, achieving effective chirality transfer and temporal-controlled SMCI. The work provides insight into metal ion-mediated supramolecular asymmetric catalysis and bioinspired chiral sensing.
Article
Chemistry, Multidisciplinary
Shuai Huang, Haifeng Yu, Quan Li
Summary: This paper summarizes recent studies on chirality transfer induced self-assembly based on various supramolecular interactions, and discusses the impact of different environments and system states on the expression of chirality, as well as the driving forces that facilitate chiral bias and the role of supramolecular interactions.
Article
Chemistry, Physical
Yuanyuan Gu, Lijia Liu, Yudan Wang, Chunhong Zhang, Toshifumi Satoh
Summary: Hierarchical chiral self-assembly of an amphiphilic helical poly(phe-nylacetylene) homopolymer containing bi-valine pendants was achieved by adding a polar solvent into the polymer solution. The influences of solvent components and temperature on the supramolecular chirality and morphologies of ordered nanostructures were investigated. Various morphologies including spheres, beads-string micelles, vesicles, nanorods, flower-like, and blocky nanostructures were obtained. The chiral property endowed by bi-valine pendants in the polyphenylacetylene backbone was transferred and enhanced in high-ordered supramolecular self-assemblies. The increase of polar solvent fraction significantly promoted the aggregation of multi micelles.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Fengru Zheng, Jiayi Lu, Zhiwen Zhu, Hao Jiang, Yuyi Yan, Yu He, Shaoxuan Yuan, Qiang Sun
Summary: The application of supramolecular chemistry on solid surfaces has been widely studied. Machine learning (ML) has become an exciting tool in material research, allowing for efficient and accurate predictions of molecular properties. In this work, a graph neural network was used to predict the self-assembly of functional polycyclic aromatic hydrocarbons (PAHs) on metal surfaces. The model showed better predictive performance compared to traditional ML algorithms, and its generalization was verified through comparisons with experimental results of different functionalized molecules.
Article
Chemistry, Multidisciplinary
Fengru Zheng, Jiayi Lu, Zhiwen Zhu, Hao Jiang, Yuyi Yan, Yu He, Shaoxuan Yuan, Qiang Sun
Summary: In this study, a graph neural network was used to predict the self-assembly of functional polycyclic aromatic hydrocarbons (PAHs) on metal surfaces. Experimental data from scanning tunneling microscopy (STM) were used to train the model. Compared to traditional machine learning algorithms, our model exhibited better predictive performance. The generalization of the model was further verified by comparing the predictions with experimental results of different functionalized molecules. Our results demonstrate the possibility of using trained experimental data sets to predict and design nanostructures with functional molecules.
Article
Chemistry, Multidisciplinary
Keigo Tashiro, Takuho Saito, Hironari Arima, Natsuki Suda, Balaraman Vedhanarayanan, Shiki Yagai
Summary: Chemists have constructed sophisticated artificial nanostructured systems through self-assembly, including scissor-shaped photochromic dyads that hierarchically self-assemble into discrete nanostructures with photoresponsive properties. These nanostructures, such as azobenzene dyads, can be dissociated and reorganized through the photoisomerization of azobenzene units, enabling controllable and adjustable structures.
Article
Chemistry, Multidisciplinary
Weiqiu Kang, Xianhe Gao, Hongbo Li, Yang Wei, Chao Wang, Ziqi Tian
Summary: An efficient approach is reported to induce the hierarchical self-assembly of perovskite CsPbBr3 nanocrystals by phase transition, which leads to the formation of asymmetric Cs4PbBr6 nanorods with circularly polarized luminescent response. The conversion process from CsPbBr3 nanocubes to Cs4PbBr6 nanocrystals is found to involve an interface phase transition initiated by cysteine molecules. The Cs4PbBr6 nanocrystals then sequentially aggregate to form nanoclusters, which further self-assemble into chiral Cs4PbBr6 nanorods. Molecular dynamics simulations reveal the gradual approach of Cs4PbBr6 nanochains to form an asymmetric structure, supported by the simulated circular dichroism spectrum.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Longfei Yao, Kuo Fu, Guofeng Liu
Summary: This study investigates the effect of solvent on chirality transfer and energy transmission in supramolecular polymer system and identifies the hierarchical assembly behavior regulated by the solvent effect. A designed AIE-core building block shows morphologic transformations with chirality amplification for both CD and CPL measurements. Time-dependent CD test demonstrates the hierarchical assembly of aggregates. The results contribute to the development of supramolecular materials with enhanced CPL performance and dynamic chirality.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Mohammad Reza Safari, Frank Matthes, Claus M. Schneider, Karl-Heinz Ernst, Daniel E. Buergler
Summary: The interaction between chirality and magnetism has fascinated scientists for many years. Recently, chirality-induced spin selectivity has regained attention. Experimental observations have shown significant spin polarization when electron travels through layers of chiral molecules. However, the exact mechanism behind this phenomenon remains unclear.
Article
Chemistry, Multidisciplinary
Jan Voigt, Kevin Martin, Egzona Neziri, Milos Baljozovic, Christian Wackerlin, Narcis Avarvari, Karl-Heinz Ernst
Summary: The dimerization of hexahelicene on a gold(111) surface was investigated using scanning tunneling microscopy and time-of-flight secondary mass spectrometry. The coupling of (rac)-2-bromo-hexahelicene led to the formation of (M,M)- and (P,P)-diastereomers of 2,2'-bis(hexahelicene), while the formation of the (M,P)-diastereomer was not observed. Cooling caused the bis(hexahelicene) to aggregate into an ordered two-dimensional lattice with partly randomly distributed enantiomers. The specific diastereomeric coupling is attributed to the surface alignment of the reactant and the steric overcrowding in a potential surface-confined (M,P)-product.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Polymer Science
Jiacheng Zhang, Shanlong Li, Yucheng Yin, Luoxing Xiang, Fugui Xu, Yiyong Mai
Summary: This study reports the self-assembly of a copolymer into helical nanowires through pi-pi stacking and solvophobic interaction. The chirality of the nanowires is found to be tunable by adding different chiral compounds. This research is significant for expanding the library of ordered self-assembled structures of alternating copolymers and constructing helical supramolecular structures.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Johannes Seibel, Giulio Fittolani, Hossein Mirhosseini, Xu Wu, Stephan Rauschenbach, Kelvin Anggara, Peter H. Seeberger, Martina Delbianco, Thomas D. Kuehne, Uta Schlickum, Klaus Kern
Summary: Carbohydrates have significant potential as structural materials, but their design is lagging behind that of proteins and nucleic acids. This study uses high-resolution scanning tunneling microscopy to investigate the three-dimensional structure and intermolecular interactions of cellulose oligomers. The results demonstrate enantioselective interactions that can drive the separation of cellulose chains and promote the formation of engineered carbohydrate assemblies.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Terefe G. Habteyes, Eric R. Westphal, Kenneth M. Plackowski, Paul G. Kotula, Melissa L. Meyerson, Stephanie L. White, W. Cody Corbin, Koushik Ghosh, John K. Grey
Summary: Carbon dots prepared from citric acid and urea can self-assemble into nanowire structures. The self-assembly process and the interplay between different chemical constituents at the nanoscale were revealed using scattering-type scanning near-field optical microscopy. Residual citrate was found to promote the tautomerization of melamine molecules, forming long-range and highly directional hydrogen-bonding networks in the nanowires. This self-assembly mechanism can be utilized to fabricate functional structures on arbitrary surfaces.
Article
Environmental Sciences
Farah Qazi, Esmaeil Shahsavari, Steven Prawer, Andrew S. Ball, Snjezana Tomljenovic-Hanic
Summary: Polyaromatic hydrocarbons (PAHs) are considered as primary pollutants due to their toxic effects. Traditional identification methods are laborious and do not consider the heterogeneous distribution of PAHs. Confocal microscopy is proposed as a rapid and accurate technique for direct analysis of PAHs in soil samples without the complexity of sample pre-processing.
ENVIRONMENTAL POLLUTION
(2021)
Article
Chemistry, Physical
Jonathan Derouin, Rachael G. Farber, Marie E. Turano, Erin V. Iski, Daniel R. Killelea
Article
Chemistry, Physical
Rachael G. Farber, Marie E. Turano, Eleanor C. N. Oskorep, Noelle T. Wands, Erin V. Iski, Daniel R. Killelea
JOURNAL OF PHYSICAL CHEMISTRY C
(2017)
Article
Chemistry, Multidisciplinary
Erin V. Iski, Esmeralda N. Yitamben, Li Gao, Nathan P. Guisinger
ADVANCED FUNCTIONAL MATERIALS
(2013)
Article
Chemistry, Medicinal
Heather L. Tierney, April D. Jewell, Ashleigh E. Baber, Erin V. Iski, E. Charles H. Sykes
Article
Chemistry, Physical
EunKyung Cho, Esmeralda N. Yitamben, Erin V. Iski, Nathan P. Guisinger, T. F. Kuech
JOURNAL OF PHYSICAL CHEMISTRY C
(2012)
Article
Chemistry, Physical
Esmeralda N. Yitamben, L. Niebergall, Rees B. Rankin, Erin V. Iski, Richard A. Rosenberg, Jeffrey P. Greeley, V. S. Stepanyuk, Nathan P. Guisingert
JOURNAL OF PHYSICAL CHEMISTRY C
(2013)
Article
Chemistry, Physical
Erin V. Iski, April D. Jewell, Heather L. Tierney, Georgios Kyriakou, E. Charles H. Sykes
Article
Chemistry, Physical
Jesse A. Phillips, Lauren K. Harville, Heather R. Morgan, Lauren E. Jackson, Gabriel LeBlanc, Erin V. Iski
Article
Multidisciplinary Sciences
Brian Kiraly, Erin V. Iski, Andrew J. Mannix, Brandon L. Fisher, Mark C. Hersam, Nathan P. Guisinger
NATURE COMMUNICATIONS
(2013)
Article
Chemistry, Multidisciplinary
Nathan P. Guisinger, Andrew J. Mannix, Rees B. Rankin, Brian Kiraly, Jesse A. Phillips, Seth B. Darling, Brandon L. Fisher, Mark C. Hersam, Erin V. Iski
ADVANCED MATERIALS INTERFACES
(2019)
Article
Chemistry, Multidisciplinary
Jesse A. Phillips, Gregory H. Jones, Erin Iski
JOURNAL OF CHEMICAL EDUCATION
(2019)
Article
Nanoscience & Nanotechnology
Jesse A. Phillips, K. P. Boyd, I. Baljak, L. K. Harville, Erin V. Iski
Article
Materials Science, Coatings & Films
Kennedy P. S. Boyd, Jesse A. Phillips, Maria A. Paszkowiak, Kassidy K. Everett, Emily A. Cook, Erin Iski
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2020)
Article
Materials Science, Coatings & Films
Kennedy P. S. Boyd, Emily A. Cook, Maria A. Paszkowiak, Erin V. Iski
Summary: The study showed that the presence of an Ag monolayer can drastically alter the interactions between amino acids and surfaces, leading to surface roughening despite the chemical similarity of Au and Ag. This research highlights the ability of Ag thin films to markedly change surface chemistry under extremely mild conditions.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2021)