Article
Multidisciplinary Sciences
Suchetana Sarkar, Kwan Ho Au-Yeung, Tim Kuehne, Albrecht Waentig, Dmitry A. Ryndyk, Thomas Heine, Gianaurelio Cuniberti, Xinliang Feng, Francesca Moresco
Summary: We investigated a prochiral thiophene-based molecule that self-assembles on the Au(111) surface forming islands with different domains using low temperature scanning tunneling microscopy. Two different conformations of the single molecule were observed in the domains, depending on the rotation of bromothiophene groups. By applying voltage pulses from the tip, single molecules could be switched between the two conformations. Scanning tunneling spectroscopy revealed that electronic resonances were mainly localized at the same positions in both conformations. Density-functional theory calculations supported the experimental findings. Moreover, we found that on Ag(111), only one configuration was present and the switching effect was suppressed.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Shijie Sun, Baijin Li, Boyu Fu, Zilin Ruan, Hui Zhang, Wei Xiong, Yong Zhang, Gefei Niu, Jianchen Lu, Xiaoqing Zuo, Lei Gao, Jinming Cai
Summary: Nanoscale low-dimensional chiral architectures have attracted increasing scientific interest due to their potential applications in chiral recognition, separation, and transformation. In this study, large-area two-dimensional chiral networks on Au(111) and one-dimensional metal-liganded chiral chains on Cu(111) were successfully constructed and characterized. The chiral transformation of the chiral networks on Au(111) was analyzed, and the electronic state information was studied using scanning tunneling spectroscopy. The combination of scanning tunneling microscopy and non-contact atomic force microscopy techniques enabled ultra-high-resolution characterization of chiral structures on low-dimensional surfaces.
CHINESE CHEMICAL LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Kwan Ho Au-Yeung, Tim Kuehne, Oumaima Aiboudi, Suchetana Sarkar, Olga Guskova, Dmitry A. Ryndyk, Thomas Heine, Franziska Lissel, Francesca Moresco
Summary: This article demonstrates that the ring-closure reaction of a single vinylheptafulvene adsorbed on the Au(111) surface can be induced by voltage pulses from the tip of a scanning tunneling microscope. The cyclization is accompanied by the elimination of HCN. Further experiments show that when inducing lateral movements by applying voltage pulses, the response of the single molecules changes with the ring closing reaction.
NANOSCALE ADVANCES
(2022)
Article
Chemistry, Physical
Simon Jaekel, Emile Durant, Monika Schied, Mats Persson, Jakub Ostapko, Michal Kijak, Jacek Waluk, Leonhard Grill
Summary: In this study, 22-oxahemiporphycene molecules were investigated using scanning tunneling microscopy and density functional theory calculations. Unlike other molecular switches, these molecules can exist in three different tautomers due to their asymmetry and three inequivalent binding positions of a hydrogen atom. The different tautomers can be identified from the appearance on the surface, and tunneling electrons can be used to tautomerize single molecules in a controllable way.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Yajie Bian, Junbo Cheng, Yuyi Zhang, Haitao Sun, Jun Zhang, Xiaolei Zhang, Qingyuan Jin
Summary: In this study, scanning tunneling microscopy was used to investigate the self-assembly of 2-(hydroxymethyl)benzimidazole (HMBI) molecules and the thermal stability of the assemblies on the herringbone structure of a reconstructed Au (111) surface. The results suggest that the arrangement of the molecules on the surface is collectively determined by hydrogen-bond interactions between HMBI molecules and the molecule-substrate interaction. After annealing, the molecules can dehydrogenate and form molecule-metal coordinated structures. Additionally, the herringbone structure of the substrate is found to be compressed in the metal coordinated structures compared to the native Au (111) surface, indicating a mutual influence between the adsorbate and substrate.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Hui Zhang, Jianchen Lu, Xin-Jing Zhao, Baijin Li, Hangjing Zhou, Yong Zhang, Gefei Niu, Boyu Fu, Lei Gao, Yuan-Zhi Tan, Jinming Cai
Summary: This study systematically fabricated anthenes with varying lengths and analyzed their magnetic evolution on the Au(111) surface. The results revealed a transition in magnetic properties associated with the length of the anthenes, showing a weak exchange coupling and charge transfer-induced doublet in longer anthenes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Chemical
Wan-Tzu Yen, Ke-Hsuan Wang, Masaaki Yoshida, Murugesan Balamurugan, Takeshi Kawai, Shanmugamathan Venkatesan, Yuh-Lang Lee
Summary: In this study, dodecylamine is used as a model molecule to investigate its self-assembly behavior on an Au surface. The results show weak interaction and slow adsorption of DDA with the gold surface, with molecules arranged in a flat-lying orientation.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Chemistry, Multidisciplinary
Chong Chen, Pengcheng C. Ding, Zhuo Li, Guoqiang Q. Shi, Ye Sun, Lev N. Kantorovich, Flemming Besenbacher, Miao Yu
Summary: This study reports the super-robust complexes formed by xanthine and sodium and demonstrates their high thermal stability in a high-temperature environment. These findings support the theory of life originating from hydrothermal environments and reveal the robustness of the complexes and their ability to induce electron transfer in harsh conditions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Crystallography
Talha Ijaz, Xin Zhang, Xiaorui Chen, Xueting Xing, Simin Fang, Mengyuan Liu, Huan Lu, Fangsen Li, Jianzhi Gao, Minghu Pan
Summary: The self-assembly and photo-induced mechanical switching of azobenzene derivatives on Au (111) was studied, showing potential for nanoscale optical applications. The molecules experienced configurational changes upon UV light exposure, suggesting new possibilities for nanoscale photo-switch molecular devices.
Article
Chemistry, Multidisciplinary
Ana Barragan, Tomas Nicolas-Garcia, Koen Lauwaet, Ana Sanchez-Grande, Jose Urgel, Jonas Bjork, Emilio M. Perez, David Ecija
Summary: Nanocars are carbon-based single-molecules that can be precisely controlled on a surface at the atomic scale. The design of these molecules plays a crucial role in advancing the development of molecular machines and understanding self-assembly and other processes. In this study, we present the design and construction of a collection of minimalistic nanocars featuring an anthracene chassis and benzene derivatives as wheels. By using a scanning tunneling microscope (STM) tip to induce a dipole in the nanocar, we were able to manipulate it along the surface, achieving controlled and rapid displacement. The use of carbon monoxide functionalized tips prevented decomposition and accidental picking up of the nanocars during manipulation, leading to our success in the Nanocar Race II championship.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Donglin Li, Luye Sun, Yuanqi Ding, Mengxi Liu, Lei Xie, Yinfu Liu, Lina Shang, Yangfan Wu, Hui-Jun Jiang, Lifeng Chi, Xiaohui Qiu, Wei Xu
Summary: This study focuses on the role of water molecules in driving chiral separation on the surface when RNA base uracil selfassembles into homochiral structures upon water exposure. The findings provide insights into the general role of water molecules in the origin of homochirality in living systems, with implications for other biologically relevant molecules such as amino acids and sugars.
Article
Chemistry, Physical
Shuqiu Wang, Yuhan Zhu, Maxime van den Bossche, Jacek Goniakowski, Claudine Noguera, Martin R. Castell
Summary: A class of planar NbnOm atomic clusters, synthesized by evaporating metallic Nb onto an Au(111) substrate in an ultrahigh vacuum environment and subsequent oxidation at elevated temperatures, have been reported. The clusters are composed of structural units with four-, five-, and sixfold rotational symmetry and can assemble to form larger planar clusters. The interaction with the Au substrate significantly alters the atomic and electronic structures of the oxide clusters, including interfacial charge transfer and structural relaxation, enabling the coexistence of a large variety of cluster configurations.
Article
Chemistry, Multidisciplinary
Matteo Briganti, Giulia Serrano, Lorenzo Poggini, Andrea Luigi Sorrentino, Brunetto Cortigiani, Luana Carol de Camargo, Jaisa Fernandes Soares, Alessandro Motta, Andrea Caneschi, Matteo Mannini, Federico Totti, Roberta Sessoli
Summary: In this study, the structural and chemical properties of [CpTi(cot)] on Au(111) were investigated using experimental and computational methods. It was found that the adsorbed molecules have two orientations, with the standing ones experiencing charge delocalization towards the surface. This orientation-dependent molecule-surface hybridization opens up possibilities for selective control of molecule-substrate spin delocalization in hybrid interfaces.
Article
Chemistry, Multidisciplinary
Ana Barragan, Roberto Robles, Lucia Vitali, Nicolas Lorente
Summary: Thioether polymers are synthesized by the thermal annealing of 4-bromo-4-mercaptobiphenyl adsorbed on the surface of Au(111), forming intermolecular C-S bonds through four reaction steps involving sulfhydryl or bromine molecular functional groups. The simultaneous occurrence of dehalogenation and dissociation of the S-Au bond is necessary to overcome the competitive formation of C-C bonds. The electronic properties of the phenyl-sulfur bond and the polymer vary with the ligand length, suggesting a broader perspective for this chemical synthesis.
Article
Chemistry, Physical
Ping Zhang, Linjie Chen, Shaoxiang Sheng, Wenqi Hu, Huiru Liu, Chen Ma, Zijia Liu, Baojie Feng, Peng Cheng, Yiqi Zhang, Lan Chen, Jin Zhao, Kehui Wu
Summary: This study investigated the adsorption and self-assembly structures of melamine molecules on an Ag(111) surface using low temperature scanning tunneling microscopy (STM) combined with tip-enhanced Raman spectroscopy (TERS). Two ordered self-assembly phases of melamine molecules on Ag(111) were observed, and it was found that the dehydrogenation of melamine can be controlled by annealing the sample or through a tip-enhanced photo-catalytic effect.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Organic
Joseph Z. Hamilton, Nathaniel T. Kadunce, Michael D. McDonald, Laura Rios, Albert R. Matlin
TETRAHEDRON LETTERS
(2015)
Article
Chemistry, Physical
Laura Rios, Joonhee Lee, Nicholas Tallarida, V. Ara Apkarian
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2016)
Article
Chemistry, Physical
Rebecca L. M. Gieseking, Joonhee Lee, Nicholas Tallarida, Vartkess Ara Apkarian, George C. Schatz
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2018)
Article
Multidisciplinary Sciences
Joonhee Lee, Nicholas Tallarida, Xing Chen, Lasse Jensen, V. Ara Apkarian
Article
Chemistry, Multidisciplinary
Joonhee Lee, Nicholas Tallarida, Laura Rios, Shawn M. Perdue, Vartkess Ara Apkarian
Article
Chemistry, Physical
Stephen S. Sasaki, Yan-Ning Zhang, Shirshendu Dey, Nicholas Tallarida, Patrick Z. El-Khoury, V. A. Apkarian, Ruqian Wu
JOURNAL OF PHYSICAL CHEMISTRY C
(2014)
Article
Education & Educational Research
Dimitri R. Dounas-Frazer, Laura Rios, Benjamin Pollard, Jacob T. Stanley, H. J. Lewandowski
PHYSICAL REVIEW PHYSICS EDUCATION RESEARCH
(2018)
Article
Multidisciplinary Sciences
Joonhee Lee, Kevin T. Crampton, Nicholas Tallarida, V. Ara Apkarian
Article
Education & Educational Research
Laura Rios, Benjamin Pollard, Dimitri R. Dounas-Frazer, H. J. Lewandowski
PHYSICAL REVIEW PHYSICS EDUCATION RESEARCH
(2019)
Article
Chemistry, Multidisciplinary
Nicholas Tallarida, Joonhee Lee, Vartkess Ara Apkarian
Article
Chemistry, Multidisciplinary
Joonhee Lee, Nicholas Tallarida, Xing Chen, Pengchong Liu, Lasse Jensen, Vartkess Ara Apkarian
