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Ali MA, Chen F, Hu Y, Lee SL. Structural Diversity of 2D Molecular Self-Assemblies Arising from Carboxyl Groups Attached to a Molecule: An STM Study at the Liquid-Solid Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024. [PMID: 39264220 DOI: 10.1021/acs.langmuir.4c02661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/13/2024]
Abstract
Understanding the molecular self-assembly behavior, especially at the microscopic level, sheds light on the rational design of artificial supramolecular systems at surfaces. In this work, scanning tunneling microscopy (STM) and force field simulations were utilized to explore two molecular systems where two and four carboxyl groups are symmetrically modified onto a skeleton. The two target molecules are 4,4'-(ethyne-1,2-diyl) dibenzoic acid (EBA) and 1,1'-ethynebenzene-3,3',5,5,'-tetracarboxylic acid (TCA). The former molecular assembly led to robust close packing, whereas the latter resulted in low-density arrangements that present significant adaption, namely, undergoing phase transformations upon external stimulations, e.g., sensitive to STM-polarity switching and guest molecule incorporations.
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Affiliation(s)
- Muhammad Atif Ali
- Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong, China 518060
- Institute of Microscale Optoelectronic, College of Optical Engineering, Shenzhen University, Shenzhen, Guangdong, China 518060
| | - Fang Chen
- Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong, China 518060
| | - Yi Hu
- Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong, China 518060
| | - Shern-Long Lee
- Institute for Advanced Study, Shenzhen University, Shenzhen, Guangdong, China 518060
- Institute of Microscale Optoelectronic, College of Optical Engineering, Shenzhen University, Shenzhen, Guangdong, China 518060
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Camilli L, Hogan C, Romito D, Persichetti L, Caporale A, Palummo M, Di Giovannantonio M, Bonifazi D. On-Surface Molecular Recognition Driven by Chalcogen Bonding. JACS AU 2024; 4:2115-2121. [PMID: 38938818 PMCID: PMC11200221 DOI: 10.1021/jacsau.4c00325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 05/17/2024] [Accepted: 05/20/2024] [Indexed: 06/29/2024]
Abstract
Chalcogen bonding interactions (ChBIs) have been widely employed to create ordered noncovalent assemblies in solids and liquids. Yet, their ability to engineer molecular self-assembly on surfaces has not been demonstrated. Here, we report the first demonstration of on-surface molecular recognition solely governed by ChBIs. Scanning tunneling microscopy and ab initio calculations reveal that a pyrenyl derivative can undergo noncovalent chiral dimerization on the Au(111) surface through double Ch···N interactions involving Te- or Se-containing chalcogenazolo pyridine motifs. In contrast, reference chalcogenazole counterparts lacking the pyridyl moiety fail to form regular self-assemblies on Au, resulting in disordered assemblies.
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Affiliation(s)
- Luca Camilli
- Department
of Physics, University of Rome “Tor
Vergata”, via della Ricerca Scientifica 1, 00133 Roma, Italy
| | - Conor Hogan
- Department
of Physics, University of Rome “Tor
Vergata”, via della Ricerca Scientifica 1, 00133 Roma, Italy
- CNR-Istituto
di Struttura della Materia (CNR-ISM), 00133 Roma, Italy
| | - Deborah Romito
- Department
of Organic Chemistry, Faculty of Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
| | - Luca Persichetti
- Department
of Physics, University of Rome “Tor
Vergata”, via della Ricerca Scientifica 1, 00133 Roma, Italy
| | - Antonio Caporale
- Department
of Physics, University of Rome “Tor
Vergata”, via della Ricerca Scientifica 1, 00133 Roma, Italy
| | - Maurizia Palummo
- INFN,
Department of Physics, University of Rome
“Tor Vergata”, via della Ricerca Scientifica 1, 00133 Roma, Italy
| | | | - Davide Bonifazi
- Department
of Organic Chemistry, Faculty of Chemistry, University of Vienna, Währinger Straße 38, 1090 Vienna, Austria
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Meng T, Xiao X, Deng K, Zeng Q. Study on 2D Molecular Networks of Flexible Pentacarboxylic Acid Ligands Induced by Ether Bonds in Response to Selective Guest Inclusion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:10737-10744. [PMID: 38718162 DOI: 10.1021/acs.langmuir.4c00886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
The flexibility of ligands allows for their bending, twisting, or rotation to adopt various conformations, leading to distinct symmetries during the self-assembled process. Flexible aromatic acid ligands modified by ether bonds are a promising type of self-assembled module when it comes to surfaces. Here, two pentacarboxylic acid ligands (H5L1 and H5L2) with minor skeleton differences have successfully self-assembled into disparate porous networks on the graphite surface and demonstrated excellent potential for the inclusion of guest molecules. The H5L1 molecule's network structure only accommodates coronene (COR) molecules. With fewer COR molecules, H5L1 molecules act as a host template to accommodate the COR molecules. When there are too many COR molecules, COR molecules will induce H5L1 molecules to transform into a new host-guest nanostructure. Additionally, H5L2 molecules showed the ability to capture C70 molecules and exhibited cavity selectivity. However, the assembled network of H5L2 was slightly deformed in attempts to trap the COR molecules. To understand these phenomena more deeply, various assembled mechanisms were analyzed in combination with building theoretical models and energy analysis. These results reveal the great potential of flexible aromatic acid ligands in two-dimensional self-assembly and host-guest systems for their application in related fields.
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Affiliation(s)
- Ting Meng
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology (NCNST), Beijing 100190, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
- College of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, Zhejiang 315211, P. R. China
| | - Xunwen Xiao
- College of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo, Zhejiang 315211, P. R. China
| | - Ke Deng
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology (NCNST), Beijing 100190, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Qingdao Zeng
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology (NCNST), Beijing 100190, P. R. China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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Yu L, Li S, Lu Y, Wang Z, Fu M, Wei S, Xu C, Wang Q, Liu X, Wang L. Phase Transitions of Naphthalene-2,3-carbonitride Steered by Solvent Effects and Metal Ion Concentration Variation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:1072-1078. [PMID: 38154099 DOI: 10.1021/acs.langmuir.3c03328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2023]
Abstract
The delicate regulation of structural phase transition can provide advanced approaches for fabricating desired and well-organized nanoarchitectures on surfaces. Introduction of metal ions into pure organic systems can facilitate the phase transition from hydrogen-bonded structures to metal-organic structures by coordinating with organic molecules. However, it remains a challenge to attain a phase transition dominated by variable metal coordination configurations through adjustment of the metal ion concentration. Herein, we report the phase transitions of naphthalene-2,3-carbonitride (2,3-DCN) molecules on highly oriented pyrolytic graphite (HOPG) under varying solvents and Cu2+ ion concentrations. By integrating data from scanning tunneling microscopy imaging and density functional theory calculations, it is demonstrated that phase transitions of 2,3-DCN occur through forming diverse coordination configurations where Cu2+ ions can coordinate with 2,3-DCN and 1-nonanoic acid or Cl- ions to form different ligand components with a coordination number of 4 when varying the molar ratios of 2,3-DCN to Cu2+ ion in the 1-nonanoic acid solvent. However, in the case of 1-heptanoic acid as a solvent, the self-assembly structure of 2,3-DCN only changes via the alteration of hydrogen bonding sites and Cu2+ ions do not coordinate with 2,3-DCN molecules. These findings provide valuable insights into the coordination behavior of metal ions in different solvents.
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Affiliation(s)
- Longnan Yu
- Department of Physics, Nanchang University, Nanchang 330031, China
| | - Sihao Li
- Department of Physics, Nanchang University, Nanchang 330031, China
| | - Yan Lu
- Department of Physics, Nanchang University, Nanchang 330031, China
| | - Zhongping Wang
- Department of Physics, Nanchang University, Nanchang 330031, China
| | - Mingming Fu
- Department of Physics, Nanchang University, Nanchang 330031, China
| | - Sheng Wei
- Department of Physics, Nanchang University, Nanchang 330031, China
| | - Changgang Xu
- Department of Physics, Nanchang University, Nanchang 330031, China
| | - Qing Wang
- Department of Physics, Nanchang University, Nanchang 330031, China
| | - Xiaoqing Liu
- Department of Physics, Nanchang University, Nanchang 330031, China
| | - Li Wang
- Department of Physics, Nanchang University, Nanchang 330031, China
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Sato Y, De Feyter S, Tahara K. Formation of Supramolecular Heterostacks at the Liquid-Solid Interface: Impact of Symmetry Mismatching on Structural Growth. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:16825-16832. [PMID: 37967133 DOI: 10.1021/acs.langmuir.3c02327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2023]
Abstract
The construction of intricate three-dimensional (3D) nanoarchitectures on surfaces through molecular self-assembly attracts attention not only from a crystal engineering viewpoint but also because of its potential in a range of applications, given the current interest in van der Waals heterostructures. We herein report the formation of porous structures on alkane buffer layers on graphite. A dehydrobenzo[12]annulene (DBA) derivative having six decyloxy chains forms hexagonal structures on n-pentacontane and n-hexacontane buffer layers through van der Waals interactions at the 1-octanoic acid/graphite interface. The structural features are very similar to those on the graphite surface, except for the slight structural distortion, which is attributed to the p2 symmetry of the buffer layer underneath. Moreover, based on the observation of small clusters of the DBA molecules, we discussed the nucleation and structural growth of the DBA network on a buffer layer. Finally, a hierarchical multicomponent structure was formed through the coadsorption of a heteromolecular cluster formed by a hydrogen-bonded isophthalic acid cyclic hexamer hosting a coronene molecule on the buffer layer. This study on supramolecular heterostacks provides insights into the construction of intricate 3D nanoarchitectures using self-assembly at interfaces.
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Affiliation(s)
- Yuta Sato
- Department of Applied Chemistry, School of Science and Technology, Meiji University, 1-1-1 Higashimita, Tama-ku, Kawasaki, Kanagawa 214-8571, Japan
| | - Steven De Feyter
- Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200 F, 3001 Leuven, Belgium
| | - Kazukuni Tahara
- Department of Applied Chemistry, School of Science and Technology, Meiji University, 1-1-1 Higashimita, Tama-ku, Kawasaki, Kanagawa 214-8571, Japan
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