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Cai L, Gao T, Wee ATS. Topology selectivity of a conformationally flexible precursor through selenium doping. Nat Commun 2024; 15:3235. [PMID: 38622157 PMCID: PMC11018763 DOI: 10.1038/s41467-024-47614-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2023] [Accepted: 04/05/2024] [Indexed: 04/17/2024] Open
Abstract
Conformational arrangements within nanostructures play a crucial role in shaping the overall configuration and determining the properties, for example in covalent/metal organic frameworks. In on-surface synthesis, conformational diversity often leads to uncontrollable or disordered structures. Therefore, the exploration of controlling and directing the conformational arrangements is significant in achieving desired nanoarchitectures. Herein, a conformationally flexible precursor 2,4,6-tris(3-bromophenyl)-1,3,5-triazine is employed, and a random phase consisting of C3h and Cs conformers is firstly obtained after deposition of the precursor on Cu(111) at room temperature to 365 K. At low coverage (0.01 ML) selenium doping, we achieve the selectivity of the C3h conformer and improve the nanopore structural homogeneity. The ordered two-dimensional metal organic nanostructure can be fulfilled by selenium doping from room temperature to 365 K. The formation of the conformationally flexible precursor on Cu(111) is explored through the combination of high-resolution scanning tunneling microscopy and non-contact atomic force microscopy. The regulation of energy diagrams in the absence or presence of the Se atom is revealed by density functional theory calculations. These results can enrich the on-surface synthesis toolbox of conformationally flexible precursors, for the design of complex nanoarchitectures, and for future development of engineered nanomaterials.
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Affiliation(s)
- Liangliang Cai
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117542, Singapore
| | - Tianhao Gao
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117542, Singapore
| | - Andrew T S Wee
- Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore, 117542, Singapore.
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Xu H, Chakraborty R, Adak AK, Das A, Yang B, Meier D, Riss A, Reichert J, Narasimhan S, Barth JV, Papageorgiou AC. On-Surface Isomerization of Indigo within 1D Coordination Polymers. Angew Chem Int Ed Engl 2024; 63:e202319162. [PMID: 38235942 DOI: 10.1002/anie.202319162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/10/2024] [Accepted: 01/17/2024] [Indexed: 01/19/2024]
Abstract
Natural products are attractive components to tailor environmentally friendly advanced new materials. We present surface-confined metallosupramolecular engineering of coordination polymers using natural dyes as molecular building blocks: indigo and the related Tyrian purple. Both building blocks yield identical, well-defined coordination polymers composed of (1 dehydroindigo : 1 Fe) repeat units on two different silver single crystal surfaces. These polymers are characterized atomically by submolecular resolution scanning tunnelling microscopy, bond-resolving atomic force microscopy and X-ray photoelectron spectroscopy. On Ag(100) and on Ag(111), the trans configuration of dehydroindigo results in N,O-chelation in the polymer chains. On the more inert Ag(111) surface, the molecules additionally undergo thermally induced isomerization from the trans to the cis configuration and afford N,N- plus O,O-chelation. Density functional theory calculations confirm that the coordination polymers of the cis-isomers on Ag(111) and of the trans-isomers on Ag(100) are energetically favoured. Our results demonstrate post-synthetic linker isomerization in interfacial metal-organic nanosystems.
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Affiliation(s)
- Hongxiang Xu
- Technical University of Munich, TUM School of Natural Sciences, Physics Department E20, James Franck Strasse 1, 85748, Garching, Germany
| | - Ritam Chakraborty
- Theoretical Sciences Unit & School of Advanced Materials, Jawaharlal Nehru Centre for Advanced Scientific Research Jakkur, Bangalore, 560054, India
| | - Abhishek Kumar Adak
- Theoretical Sciences Unit & School of Advanced Materials, Jawaharlal Nehru Centre for Advanced Scientific Research Jakkur, Bangalore, 560054, India
- Current address: The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, 34151, Trieste, Italy
| | - Arpan Das
- Theoretical Sciences Unit & School of Advanced Materials, Jawaharlal Nehru Centre for Advanced Scientific Research Jakkur, Bangalore, 560054, India
| | - Biao Yang
- Technical University of Munich, TUM School of Natural Sciences, Physics Department E20, James Franck Strasse 1, 85748, Garching, Germany
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, P. R. China
| | - Dennis Meier
- Technical University of Munich, TUM School of Natural Sciences, Physics Department E20, James Franck Strasse 1, 85748, Garching, Germany
| | - Alexander Riss
- Technical University of Munich, TUM School of Natural Sciences, Physics Department E20, James Franck Strasse 1, 85748, Garching, Germany
| | - Joachim Reichert
- Technical University of Munich, TUM School of Natural Sciences, Physics Department E20, James Franck Strasse 1, 85748, Garching, Germany
| | - Shobhana Narasimhan
- Theoretical Sciences Unit & School of Advanced Materials, Jawaharlal Nehru Centre for Advanced Scientific Research Jakkur, Bangalore, 560054, India
| | - Johannes V Barth
- Technical University of Munich, TUM School of Natural Sciences, Physics Department E20, James Franck Strasse 1, 85748, Garching, Germany
| | - Anthoula C Papageorgiou
- Technical University of Munich, TUM School of Natural Sciences, Physics Department E20, James Franck Strasse 1, 85748, Garching, Germany
- Laboratory of Physical Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Panepistimiopolis, 15771, Athens, Greece
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