1
|
Omar S, Irran E, Wiedemann D, Baabe D, Grohmann A. Sterically crowded di-indazolyl-pyridines: Iron(II) complexation studies. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2023. [DOI: 10.1515/znb-2023-0311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
Abstract
Abstract
4-(2,6-Di(2H-indazol-2-yl)pyridin-4-yl)benzoic acid (1) and 10-(2,6-di(1H-pyrazol-1-yl)pyridin-4-yl)anthracene-9-carboxylic acid (2) were required for adsorption studies on Ag(111), with a view to subsequent iron(II) complexation and formation of well-ordered spin-responsive self-assembled monolayers. While the generation of these compounds has remained elusive, several intermediates and by-products were obtained, potentially useful as dipyrazolylpyridine-related derivatives and for metal ion coordination. 3,5-Dichloro-2,6-diindazolylpyridine-4-amine, which forms as a mixture of regioisomers, was synthesised, the mixture separated, and the components characterised (3,5-dichloro-2,6-di(2H-indazol-2-yl)pyridin-4-amine; 3,5-dichloro-2-(1H-indazol-1-yl)-6-(2H-indazol-2-yl)pyridin-4-amine; 3,5-dichloro-2,6-di(1H-indazol-1-yl)pyridin-4-amine). Their iron(II) complexes have been prepared and fully characterised, including single crystal X-ray structure determination. The complexes are instructive examples of the influence of ligand design (“steric jamming”) on the spin-crossover (SCO) activity of FeII centres. Bulky substitution, which entails twisted ligand conformation, increases intramolecular crowding. This prevents contraction of the metal coordination sphere, which would be a prerequisite for thermally inducible SCO. Mössbauer spectroscopy has revealed that the complexes remain predominantly high-spin (HS) between 20 and 200 K, and that a mixture of conformational HS isomers is present in the microcrystalline solid.
Collapse
Affiliation(s)
- Suhad Omar
- Institut für Chemie, Technische Universität Berlin , Straße des 17. Juni 135, 10623 Berlin , Germany
| | - Elisabeth Irran
- Institut für Chemie, Technische Universität Berlin , Straße des 17. Juni 135, 10623 Berlin , Germany
| | - Dennis Wiedemann
- Institut für Chemie, Technische Universität Berlin , Straße des 17. Juni 135, 10623 Berlin , Germany
- GfBU-Consult Gesellschaft für Umwelt- und Managementberatung mbH , Mahlsdorfer Straße 61b, 15366 Hoppegarten , Germany
| | - Dirk Baabe
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig , Hagenring 30, 38106 Braunschweig , Germany
| | - Andreas Grohmann
- Institut für Chemie, Technische Universität Berlin , Straße des 17. Juni 135, 10623 Berlin , Germany
| |
Collapse
|
2
|
Das S, Nascimbeni G, de la Morena RO, Ishiwari F, Shoji Y, Fukushima T, Buck M, Zojer E, Zharnikov M. Porous Honeycomb Self-Assembled Monolayers: Tripodal Adsorption and Hidden Chirality of Carboxylate Anchored Triptycenes on Ag. ACS NANO 2021; 15:11168-11179. [PMID: 34125529 PMCID: PMC8320238 DOI: 10.1021/acsnano.1c03626] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 06/08/2021] [Indexed: 06/12/2023]
Abstract
Molecules with tripodal anchoring to substrates represent a versatile platform for the fabrication of robust self-assembled monolayers (SAMs), complementing the conventional monopodal approach. In this context, we studied the adsorption of 1,8,13-tricarboxytriptycene (Trip-CA) on Ag(111), mimicked by a bilayer of silver atoms underpotentially deposited on Au. While tripodal SAMs frequently suffer from poor structural quality and inhomogeneous bonding configurations, the triptycene scaffold featuring three carboxylic acid anchoring groups yields highly crystalline SAM structures. A pronounced polymorphism is observed, with the formation of distinctly different structures depending on preparation conditions. Besides hexagonal molecular arrangements, the occurrence of a honeycomb structure is particularly intriguing as such an open structure is unusual for SAMs consisting of upright-standing molecules. Advanced spectroscopic tools reveal an equivalent bonding of all carboxylic acid anchoring groups. Notably, density functional theory calculations predict a chiral arrangement of the molecules in the honeycomb network, which, surprisingly, is not apparent in experimental scanning tunneling microscopy (STM) images. This seeming discrepancy between theory and experiment can be resolved by considering the details of the actual electronic structure of the adsorbate layer. The presented results represent an exemplary showcase for the intricacy of interpreting STM images of complex molecular films. They are also further evidence for the potential of triptycenes as basic building blocks for generating well-defined layers with unusual structural motifs.
Collapse
Affiliation(s)
- Saunak Das
- Angewandte
Physikalische Chemie, Universität
Heidelberg, Im Neuenheimer Feld 253, D-69120 Heidelberg, Germany
| | - Giulia Nascimbeni
- Institute
of Solid State Physics, NAWI Graz, Graz
University of Technology, Petersgasse 16, 8010 Graz, Austria
| | | | - Fumitaka Ishiwari
- Laboratory
for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta,
Midori-ku, Yokohama 226-8503, Japan
| | - Yoshiaki Shoji
- Laboratory
for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta,
Midori-ku, Yokohama 226-8503, Japan
| | - Takanori Fukushima
- Laboratory
for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta,
Midori-ku, Yokohama 226-8503, Japan
| | - Manfred Buck
- EaStCHEM
School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, U.K.
| | - Egbert Zojer
- Institute
of Solid State Physics, NAWI Graz, Graz
University of Technology, Petersgasse 16, 8010 Graz, Austria
| | - Michael Zharnikov
- Angewandte
Physikalische Chemie, Universität
Heidelberg, Im Neuenheimer Feld 253, D-69120 Heidelberg, Germany
| |
Collapse
|
3
|
Dementyev P, Naberezhnyi D, Westphal M, Buck M, Gölzhäuser A. Carbon Nanomembranes from Aromatic Carboxylate Precursors. Chemphyschem 2020; 21:1006-1011. [PMID: 32202365 PMCID: PMC7317367 DOI: 10.1002/cphc.202000150] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 03/19/2020] [Indexed: 12/02/2022]
Abstract
Self-assembled monolayers (SAMs) serve as convenient platform for fabricating carbon nanomembranes (CNMs) of extended lateral dimensions. Highly porous CNMs are emerging as interesting materials for membrane technologies as they exhibit selectivity for water permeation and, owing to their reduced dimensionality, promise increased energy efficiency compared to established systems. In the present study terphenylcarboxylate SAMs, prepared on silver underpotential deposited on Au and irradiated by 100 eV electrons, were successfully converted into free-standing CNMs. Infrared and X-ray photoelectron spectroscopy reveal pronounced chemical changes both of the anchoring carboxylate moiety and the aromatic backbone upon electron irradiation. Permeation studies showed high specificity for water as demonstrated by the separation from tetrahydrofuran. Compared to thiols on gold, the standard CNM precursor system, the carboxylic acid based SAM exhibits equivalent characteristics. This suggests that electron-induced carbonization is insensitive to the particular choice of the anchor moiety and, therefore, the choice of precursor molecules can be extended to the versatile class of aromatic carboxylic acids.
Collapse
Affiliation(s)
- Petr Dementyev
- Physics of Supramolecular Systems and SurfacesBielefeld UniversityUniversitätsstr. 2533615BielefeldGermany
| | - Daniil Naberezhnyi
- Physics of Supramolecular Systems and SurfacesBielefeld UniversityUniversitätsstr. 2533615BielefeldGermany
| | - Michael Westphal
- Physics of Supramolecular Systems and SurfacesBielefeld UniversityUniversitätsstr. 2533615BielefeldGermany
| | - Manfred Buck
- EaStCHEM School of ChemistryUniversity of St Andrews North HaughSt AndrewsKY16 9STU.K.
| | - Armin Gölzhäuser
- Physics of Supramolecular Systems and SurfacesBielefeld UniversityUniversitätsstr. 2533615BielefeldGermany
| |
Collapse
|
4
|
Ortiz de la Morena R, Asyuda A, Lu H, Aitchison H, Turner K, Francis SM, Zharnikov M, Buck M. Shape controlled assembly of carboxylic acids: formation of a binary monolayer by intercalation into molecular nanotunnels. Phys Chem Chem Phys 2020; 22:4205-4215. [PMID: 32043099 DOI: 10.1039/c9cp06724h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Binary self-assembled monolayers (SAMs) combining a Y-shaped aromatic carboxylic acid (1,3,5-benzenetribenzoic acid, H3BTB) and a cage-type alicyclic carboxylic acid (adamantane carboxylic acid, AdCA) were investigated by scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), and near edge X-ray absorption fine structure (NEXAFS) spectroscopy. The SAMs, prepared by molecular adsorption from solution on Au substrates modified by underpotential deposition of Ag, exhibit a pronounced dependence of their structure on the assembly protocol. Exposing an H3BTB SAM to AdCA, the highly regular row structure of the native H3BTB layer persists and STM imaging does not show signs of AdCA adsorption. This is in striking contrast to the disordered arrangements of H3BTB and the presence of AdCA employing the inverted adsorption sequence or coadsorption of the two molecules. However, spectroscopic analysis of the H3BTB SAM exposed to AdCA reveals the presence also of the latter, suggesting that the AdCA molecules are hidden in the nanotunnels of the H3BTB monolayer. Direct evidence for the intercalation of AdCA is obtained by STM manipulation experiments which lay bare areas of AdCA molecules upon local removal of H3BTB. Surprisingly, these are densely packed and arranged into a highly ordered monolayer. Formation of such a compact AdCA layer is explained by expulsion of AdCA from the H3BTB nanotunnels of the surrounding intact mixed SAM, driven by release of stress in the nanotunnels built up when AdCA is intercalated.
Collapse
Affiliation(s)
| | - Andika Asyuda
- Angewandte Physikalische Chemie, Universität Heidelberg, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
| | - Hao Lu
- Angewandte Physikalische Chemie, Universität Heidelberg, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
| | - Hannah Aitchison
- EaStCHEM School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, UK.
| | - Kelly Turner
- EaStCHEM School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, UK.
| | - Stephen M Francis
- EaStCHEM School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, UK.
| | - Michael Zharnikov
- Angewandte Physikalische Chemie, Universität Heidelberg, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
| | - Manfred Buck
- EaStCHEM School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, UK.
| |
Collapse
|
5
|
Johnson KN, Hurlock MJ, Zhang Q, Hipps KW, Mazur U. Balancing Noncovalent Interactions in the Self-Assembly of Nonplanar Aromatic Carboxylic Acid MOF Linkers at the Solution/Solid Interface: HOPG vs Au(111). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:5271-5280. [PMID: 30945877 DOI: 10.1021/acs.langmuir.9b00204] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
This study explores directed noncovalent bonding in the self-assembly of nonplanar aromatic carboxylic acids on gold and graphite surfaces. It is the first step in developing a new design strategy to create two-dimensional surface metal-organic frameworks (SURFMOFs). The acid molecules used are tetraphenylethene-based and are typically employed in the synthesis of three-dimensional (3D) MOF crystalline solids. They include tetraphenylethene tetracarboxylic acid, tetraphenylethene bisphenyl carboxylic acid, and tetraphenylethene tetrakis-phenyl carboxylic acid. The two-dimensional structures formed from these molecules on highly ordered pyrolytic graphite (HOPG) and Au(111) are studied by scanning tunneling microscopy in a solution environment. The process of monolayer formation and final surface linker structures are found to be strongly dependent on the combination of the molecule and substrate used and are discussed in terms of intermolecular and molecule-substrate interactions, bonding geometry, and symmetry of the acid molecules. In the case of linker self-assembly on HOPG, the molecule-substrate interactions play a significant role in the resulting surface structure. When the acid molecules are adsorbed on Au(111), the intermolecular interactions tend to dominate over the weaker molecule-substrate bonding. Additionally, the interplay of π-π interactions and hydrogen bonding that directs the surface self-assembly on different supports can be modified by varying the linker concentration. This is particularly applicable for the case of the acid molecules adsorbing on the Au(111) substrate. Precise control over predesigned surface structures and orientation of the nonplanar aromatic carboxylic linkers open up an exciting prospect for manipulating the direction of SURFMOF growth in two dimensions and potentially in 3D.
Collapse
Affiliation(s)
- Kristen N Johnson
- Department of Chemistry , Washington State University , Pullman , Washington 99163-4630 , United States
| | - Matthew J Hurlock
- Department of Chemistry , Washington State University , Pullman , Washington 99163-4630 , United States
| | - Qiang Zhang
- Department of Chemistry , Washington State University , Pullman , Washington 99163-4630 , United States
| | - K W Hipps
- Department of Chemistry , Washington State University , Pullman , Washington 99163-4630 , United States
- Materials Science & Engineering Program , Washington State University , Pullman , Washington 99163-2711 , United States
| | - Ursula Mazur
- Department of Chemistry , Washington State University , Pullman , Washington 99163-4630 , United States
- Materials Science & Engineering Program , Washington State University , Pullman , Washington 99163-2711 , United States
| |
Collapse
|
6
|
Li J, Tu B, Li X, Ma C, Chen C, Duan W, Xiao X, Zeng Q. Self-assembled flower structures formed by C3-symmetric aromatic carboxylic acids with meta-carboxyl groups. Chem Commun (Camb) 2019; 55:11599-11602. [DOI: 10.1039/c9cc05872a] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
H6BTE self-assembled into flower-like structures with two types of cavities at the HA/HOPG interface, and the guest molecule COR was only trapped in the A-type cavities at low and high concentrations of COR.
Collapse
Affiliation(s)
- Jianqiao Li
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology
- CAS Center for Excellence in Nanoscience
- National Center for Nanoscience and Technology (NCNST)
- Beijing 100190
- China
| | - Bin Tu
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology
- CAS Center for Excellence in Nanoscience
- National Center for Nanoscience and Technology (NCNST)
- Beijing 100190
- China
| | - Xiaokang Li
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology
- CAS Center for Excellence in Nanoscience
- National Center for Nanoscience and Technology (NCNST)
- Beijing 100190
- China
| | - Chunyu Ma
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology
- CAS Center for Excellence in Nanoscience
- National Center for Nanoscience and Technology (NCNST)
- Beijing 100190
- China
| | - Chen Chen
- CAS Key Laboratory of Standardization and Measurement for Nanotechnology
- CAS Center for Excellence in Nanoscience
- National Center for Nanoscience and Technology (NCNST)
- Beijing 100190
- China
| | - Wubiao Duan
- Department of Chemistry
- School of Science
- Beijing Jiaotong University
- Beijing 100044
- China
| | - Xunwen Xiao
- School of Materials and Chemical Engineering
- Ningbo University of Technology
- Ningbo 315211
- 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
- China
| |
Collapse
|
7
|
Aitchison H, Ortiz de la Morena R, Peifer R, Omar S, Lu H, Francis SM, Zharnikov M, Grohmann A, Buck M. Self-Assembly of Di(pyrazol-1-yl)pyridine-benzoic Acid on Underpotentially Deposited Ag from Solution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:9654-9664. [PMID: 30040426 DOI: 10.1021/acs.langmuir.8b01734] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Monolayers of 4-(2,6-di(1 H-pyrazol-1-yl)pyridine-4-yl)benzoic acid (DPP-BA) on Au substrates modified by an underpotential-deposited bilayer of Ag were studied by X-ray photoelectron spectroscopy (XPS), near edge X-ray absorption fine structure spectroscopy, and scanning tunneling microscopy. Highly crystalline layers are formed with molecules coordinatively bonding to the surface through the carboxylate moiety in a bidentate configuration. The molecules assemble to rows characterized by densely packed upright-orientated DPP units occupying an area of 41 Å2. The DPP units adopt a trans-trans conformation as inferred from the N 1s XPS spectra taken at different photon energies. Their alignment alternates between adjacent rows, giving rise to a herringbone pattern. The pronouncedly different structure of the weakly commensurate self-assembled monolayer (SAM) of DPP-BA on Ag compared to the commensurate SAM of a DPP thiol on Au is a manifestation of the shift from substrate-directed assembly in the latter case to assembly dominated by intermolecular interactions in the former case.
Collapse
Affiliation(s)
- Hannah Aitchison
- EaStCHEM School of Chemistry , University of St Andrews , North Haugh , St Andrews KY16 9ST , U.K
| | | | - Raphael Peifer
- Institut für Chemie , Technische Universität Berlin , Straße des 17. Juni 135 , 10623 Berlin , Germany
| | - Suhad Omar
- Institut für Chemie , Technische Universität Berlin , Straße des 17. Juni 135 , 10623 Berlin , Germany
| | - Hao Lu
- Angewandte Physikalische Chemie , Universität Heidelberg , Im Neuenheimer Feld 253 , 69120 Heidelberg , Germany
| | - Stephen M Francis
- EaStCHEM School of Chemistry , University of St Andrews , North Haugh , St Andrews KY16 9ST , U.K
| | - Michael Zharnikov
- Angewandte Physikalische Chemie , Universität Heidelberg , Im Neuenheimer Feld 253 , 69120 Heidelberg , Germany
| | - Andreas Grohmann
- Institut für Chemie , Technische Universität Berlin , Straße des 17. Juni 135 , 10623 Berlin , Germany
| | - Manfred Buck
- EaStCHEM School of Chemistry , University of St Andrews , North Haugh , St Andrews KY16 9ST , U.K
| |
Collapse
|
8
|
Lipton-Duffin J, Abyazisani M, MacLeod J. Periodic and nonperiodic chiral self-assembled networks from 1,3,5-benzenetricarboxylic acid on Ag(111). Chem Commun (Camb) 2018; 54:8316-8319. [DOI: 10.1039/c8cc04380a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An activated reaction can lead to a diversity of intermolecular bonding motifs through partially-reacted molecules.
Collapse
Affiliation(s)
- Joshua Lipton-Duffin
- School of Chemistry, Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
- Institute for Future Environments
| | - Maryam Abyazisani
- School of Chemistry, Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
| | - Jennifer MacLeod
- School of Chemistry, Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Brisbane
- Australia
- Institute for Future Environments
| |
Collapse
|
9
|
Briones D, Leo P, Cepeda J, Orcajo G, Calleja G, Sanz R, Rodríguez-Diéguez A, Martínez F. Alkaline-earth metal based MOFs with second scale long-lasting phosphor behavior. CrystEngComm 2018. [DOI: 10.1039/c8ce00479j] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three MOFs based on alkaline-earth metals and aromatic carboxylate linkers show blue fluorescence that turns into green long-lasting phosphorescence.
Collapse
Affiliation(s)
- David Briones
- Departamento de Tecnología Química y Ambiental
- Universidad Rey Juan Carlos
- 28933 Móstoles
- Spain
| | - Pedro Leo
- Departamento de Tecnología Química y Ambiental
- Universidad Rey Juan Carlos
- 28933 Móstoles
- Spain
| | - Javier Cepeda
- Departamento de Química Aplicada
- Facultad de Química
- Universidad del País Vasco (UPV/EHU)
- 20018 Donostia
- Spain
| | - Gisela Orcajo
- Departamento de Tecnología Química
- Energética y Mecánica
- Universidad Rey Juan Carlos
- 28933 Móstoles
- Spain
| | - Guillermo Calleja
- Departamento de Tecnología Química
- Energética y Mecánica
- Universidad Rey Juan Carlos
- 28933 Móstoles
- Spain
| | - Raúl Sanz
- Departamento de Tecnología Química y Ambiental
- Universidad Rey Juan Carlos
- 28933 Móstoles
- Spain
| | | | - Fernando Martínez
- Departamento de Tecnología Química y Ambiental
- Universidad Rey Juan Carlos
- 28933 Móstoles
- Spain
| |
Collapse
|