1
|
Morgenstern A, Thomas R, Selyshchev O, Weber M, Tegenkamp C, Zahn DRT, Mehring M, Salvan G. Anchoring Atomically Precise Chiral Bismuth Oxido Nanoclusters on Gold: The Role of Amino Acid Linkers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024. [PMID: 38995738 DOI: 10.1021/acs.langmuir.4c01445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/14/2024]
Abstract
The adsorption of chiral molecules onto metallic surfaces triggers electron spin polarization at the interface, paving the way for applications in chiral opto-spintronics. However, the spin effects sensitively depend on the binding and ordering of the chiral species on surfaces. This study explores the adsorption of chiral thioether-functionalized atomically precise bismuth oxido nanoclusters (BiO-NCs) on gold (Au) surfaces, extending the conventional approach of using thiol-containing molecules and complexes to nanoclusters. Starting from the precursor [Bi38O45(NO3)20(dmso)28](NO3)4·4dmso (A), chiral BiO-NCs were synthesized by substituting the nitrates with N-(tert-butoxycarbonyl)-l-methionine (Boc-l-Met-O-) ligands to obtain [Bi38O45(Boc-l-Met-O)24] (2). The full exchange of nitrate by the Boc-l-methionine ligand was demonstrated by powder X-ray diffractograms, dynamic light scattering, electrospray ionization mass spectrometry, nuclear magnetic resonance, infrared, circular dichroism, and X-ray photoelectron spectroscopy. Compared to previously reported [Bi38O45(Boc-l-Phe-O)24(dmso)9] (1), BiO-NC 2 shows differences in the growth mode on a Au surface as revealed by scanning electron microscopy, wherefore a stronger binding of BiO-NC 2 is assumed. Anchoring of BiO-NC 2 to the Au surface through thioether groups induced a discernible change in the optical response of the Au surface analyzed by spectroscopic ellipsometry (SE). From the numerical modeling of the SE parameters, a layer thickness of ∼2 nm, corresponding to a monolayer of BiO-NC 2, was estimated for the samples prepared by dip coating. Thus, strong adsorption of BiO-NC 2 to the Au surface is concluded, which is an essential prerequisite for chiral-induced interface spin polarization.
Collapse
Affiliation(s)
- Annika Morgenstern
- Faculty of Natural Science, Institute of Physics, Semiconductor Physics, Chemnitz University of Technology, Chemnitz 09107, Germany
| | - Rico Thomas
- Faculty of Natural Science, Institute of Chemistry, Coordination Chemistry, Chemnitz University of Technology, Chemnitz 09107, Germany
| | - Oleksandr Selyshchev
- Faculty of Natural Science, Institute of Physics, Semiconductor Physics, Chemnitz University of Technology, Chemnitz 09107, Germany
- Center of Materials, Architectures and Integration of Nanomembranes, Chemnitz University of Technology, Chemnitz 09126, Germany
| | - Marcus Weber
- Faculty of Natural Science, Institute of Chemistry, Coordination Chemistry, Chemnitz University of Technology, Chemnitz 09107, Germany
- Center of Materials, Architectures and Integration of Nanomembranes, Chemnitz University of Technology, Chemnitz 09126, Germany
| | - Christoph Tegenkamp
- Faculty of Natural Science, Institute of Physics, Analysis of Solid Surfaces, Chemnitz University of Technology, Chemnitz 09107, Germany
| | - Dietrich R T Zahn
- Faculty of Natural Science, Institute of Physics, Semiconductor Physics, Chemnitz University of Technology, Chemnitz 09107, Germany
- Center of Materials, Architectures and Integration of Nanomembranes, Chemnitz University of Technology, Chemnitz 09126, Germany
| | - Michael Mehring
- Faculty of Natural Science, Institute of Chemistry, Coordination Chemistry, Chemnitz University of Technology, Chemnitz 09107, Germany
- Center of Materials, Architectures and Integration of Nanomembranes, Chemnitz University of Technology, Chemnitz 09126, Germany
| | - Georgeta Salvan
- Faculty of Natural Science, Institute of Physics, Semiconductor Physics, Chemnitz University of Technology, Chemnitz 09107, Germany
- Center of Materials, Architectures and Integration of Nanomembranes, Chemnitz University of Technology, Chemnitz 09126, Germany
| |
Collapse
|
2
|
Morgenstern A, Thomas R, Sharma A, Weber M, Selyshchev O, Milekhin I, Dentel D, Gemming S, Tegenkamp C, Zahn DRT, Mehring M, Salvan G. Deposition of Nanosized Amino Acid Functionalized Bismuth Oxido Clusters on Gold Surfaces. NANOMATERIALS 2022; 12:nano12111815. [PMID: 35683672 PMCID: PMC9182479 DOI: 10.3390/nano12111815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 05/13/2022] [Accepted: 05/19/2022] [Indexed: 11/16/2022]
Abstract
Bismuth compounds are of growing interest with regard to potential applications in catalysis, medicine, and electronics, for which their environmentally benign nature is one of the key factors. One thing that currently hampers the further development of bismuth oxido-based materials, however, is the often low solubility of the precursors, which makes targeted immobilisation on substrates challenging. We present an approach towards the solubilisation of bismuth oxido clusters by introducing an amino carboxylate as a functional group. For this purpose, the bismuth oxido cluster [Bi38O45(NO3)20(dmso)28](NO3)4·4dmso (dmso = dimethyl sulfoxide) was reacted with the sodium salt of tert-butyloxycabonyl (Boc)-protected phenylalanine (L-Phe) to obtain the soluble and chiral nanocluster [Bi38O45(Boc–Phe–O)24(dmso)9]. The exchange of the nitrates by the amino carboxylates was proven by nuclear magnetic resonance, Fourier-transform infrared spectroscopy, as well as elemental analysis and X-ray photoemission spectroscopy. The solubility of the bismuth oxido cluster in a protic as well as an aprotic polar organic solvent and the growth mode of the clusters upon spin, dip, and drop coating on gold surfaces were studied by a variety of microscopy, as well as spectroscopic techniques. In all cases, the bismuth oxido clusters form crystalline agglomerations with size, height, and distribution on the substrate that can be controlled by the choice of the solvent and of the deposition method.
Collapse
Affiliation(s)
- Annika Morgenstern
- Semiconductor Physics, Institute of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany; (A.M.); (A.S.); (O.S.); (I.M.); (D.R.T.Z.)
| | - Rico Thomas
- Coordination Chemistry, Institute of Chemistry, Chemnitz University of Technology, 09107 Chemnitz, Germany; (R.T.); (M.W.)
| | - Apoorva Sharma
- Semiconductor Physics, Institute of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany; (A.M.); (A.S.); (O.S.); (I.M.); (D.R.T.Z.)
| | - Marcus Weber
- Coordination Chemistry, Institute of Chemistry, Chemnitz University of Technology, 09107 Chemnitz, Germany; (R.T.); (M.W.)
- Center of Materials, Architectures and Integration of Nanomembranes, Chemnitz University of Technology, 09126 Chemnitz, Germany;
| | - Oleksandr Selyshchev
- Semiconductor Physics, Institute of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany; (A.M.); (A.S.); (O.S.); (I.M.); (D.R.T.Z.)
| | - Ilya Milekhin
- Semiconductor Physics, Institute of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany; (A.M.); (A.S.); (O.S.); (I.M.); (D.R.T.Z.)
| | - Doreen Dentel
- Solid Surface Analysis, Institute of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany; (D.D.); (C.T.)
| | - Sibylle Gemming
- Center of Materials, Architectures and Integration of Nanomembranes, Chemnitz University of Technology, 09126 Chemnitz, Germany;
- Theoretical Physics of Quantum Mechanical Processes and Systems, Institute of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany
| | - Christoph Tegenkamp
- Solid Surface Analysis, Institute of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany; (D.D.); (C.T.)
| | - Dietrich R. T. Zahn
- Semiconductor Physics, Institute of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany; (A.M.); (A.S.); (O.S.); (I.M.); (D.R.T.Z.)
- Center of Materials, Architectures and Integration of Nanomembranes, Chemnitz University of Technology, 09126 Chemnitz, Germany;
| | - Michael Mehring
- Coordination Chemistry, Institute of Chemistry, Chemnitz University of Technology, 09107 Chemnitz, Germany; (R.T.); (M.W.)
- Center of Materials, Architectures and Integration of Nanomembranes, Chemnitz University of Technology, 09126 Chemnitz, Germany;
- Correspondence: (M.M.); (G.S.)
| | - Georgeta Salvan
- Semiconductor Physics, Institute of Physics, Chemnitz University of Technology, 09107 Chemnitz, Germany; (A.M.); (A.S.); (O.S.); (I.M.); (D.R.T.Z.)
- Center of Materials, Architectures and Integration of Nanomembranes, Chemnitz University of Technology, 09126 Chemnitz, Germany;
- Correspondence: (M.M.); (G.S.)
| |
Collapse
|
3
|
Photocatalytic water purification under visible light using carbon nitride materials and β-Bi2O3 immobilized on electrospun polyvinyl acetate fibers. SN APPLIED SCIENCES 2022. [DOI: 10.1007/s42452-022-04945-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
AbstractWe report on the immobilization of carbon nitride (CN) materials and β-Bi2O3 on electrospun polyvinyl acetate (PVAc) fiber substrates using a dispersion based dip coating process. The spinning process was optimized by variation of several parameters to finally obtain continuous droplet-free fibers at 15 kV and a flow rate of 50 µL min−1 using a needle with 1.2 mm diameter. The polymer substrates were coated with the β-Bi2O3 and CN materials, which were characterized using SEM and applied in the photocatalytic degradation of organic pollutants such as Rhodamine B (RhB), ethinyl estradiol (EE2) and triclosan using visible light irradiation. The pollutants were degraded with up to 50% of the initial concentration within 8 h. Different amounts of CN material were deposited to evaluate the photocatalytic activity per mass. Immobilized CN materials were shown to be of higher activity (2.0 × 10−10 mol mg−1 min−1) than β-Bi2O3 (1.3 × 10−10 mol mg−1 min−1) and the mixture CN/β-Bi2O3 (1.6 × 10−10 mol mg−1 min−1). Reference samples with CN particles partially embedded in the polymer fleece showed minor degradaton rates (18% RhB degradation within 8 h) as compared to coated fiber substrates (47% RhB degradation within 8 h). Minor leaching of the carbon nitride material and no leaching of β-Bi2O3 occurs as shown by NPOC (non purgeable organic carbon) and ICP-MS measurements.
Collapse
|
4
|
Heteroleptic Zn(II) 3,5-diiodosalicylates: Structures, luminescence and features of non-covalent interactions in solid state. Polyhedron 2021. [DOI: 10.1016/j.poly.2020.114895] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
5
|
Weber M, Rüffer T, Speck F, Göhler F, Weimann DP, Schalley CA, Seyller T, Lang H, Mehring M. From a Cerium-Doped Polynuclear Bismuth Oxido Cluster to β-Bi 2O 3:Ce. Inorg Chem 2020; 59:3353-3366. [PMID: 31940184 DOI: 10.1021/acs.inorgchem.9b03240] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The simultaneous hydrolysis of Bi(NO3)3·5H2O and Ce(NO3)3·6H2O results in the formation of novel heterometallic bismuth oxido clusters with the general formula [Bi38O45(NO3)24(DMSO)28+δ]:Ce (DMSO = dimethyl sulfoxide; cerium content <1.50%), which is demonstrated by single-crystal X-ray diffraction analysis. The incorporation of cerium into the cluster core is a result of the interplay of hydrolysis and condensation of the metal nitrates in the presence of oxygen. Diffuse-reflectance UV-vis and X-ray photoelectron spectroscopy reveal the presence of CeIV in the final bismuth oxido clusters as a result of oxidation of the cerium source. The cerium atoms are statistically distributed mainly on the bismuth atom positions of the central [Bi6O9] motif of the [Bi38O45] cluster core. Hydrolysis and subsequent annealing of the bismuth oxido clusters in the temperature range of 300-400 °C provides β-Bi2O3:Ce samples with slightly lowered band gaps of approximately 2.3 eV compared to the undoped β-Bi2O3 (approximately 2.4 eV). The sintering behavior of β-Bi2O3 is significantly affected by the cerium dopant. Finally, differences in the efficiency of the as-prepared β-Bi2O3:Ce and undoped β-Bi2O3 samples in the photocatalytic decomposition of the biocide triclosan in an aqueous solution under visible-light irradiation are demonstrated.
Collapse
Affiliation(s)
- Marcus Weber
- Fakultät für Naturwissenschaften, Institut für Chemie, Professur Koordinationschemie, Technische Universität Chemnitz, 09111 Chemnitz, Germany.,Center for Materials, Architectures and Integration of Nanomembranes (MAIN), 09126 Chemnitz, Germany
| | - Tobias Rüffer
- Fakultät für Naturwissenschaften, Institut für Chemie, Professur Anorganische Chemie, Technische Universität Chemnitz, 09111 Chemnitz, Germany
| | - Florian Speck
- Fakultät für Naturwissenschaften, Institut für Physik, Professur für Experimentalphysik mit dem Schwerpunkt Technische Physik, Technische Universität Chemnitz, 09126 Chemnitz, Germany.,Center for Materials, Architectures and Integration of Nanomembranes (MAIN), 09126 Chemnitz, Germany
| | - Fabian Göhler
- Fakultät für Naturwissenschaften, Institut für Physik, Professur für Experimentalphysik mit dem Schwerpunkt Technische Physik, Technische Universität Chemnitz, 09126 Chemnitz, Germany.,Center for Materials, Architectures and Integration of Nanomembranes (MAIN), 09126 Chemnitz, Germany
| | - Dominik P Weimann
- Institut für Chemie und Biochemie der Freien, Universität Berlin, 14195 Berlin, Germany
| | - Christoph A Schalley
- Institut für Chemie und Biochemie der Freien, Universität Berlin, 14195 Berlin, Germany
| | - Thomas Seyller
- Fakultät für Naturwissenschaften, Institut für Physik, Professur für Experimentalphysik mit dem Schwerpunkt Technische Physik, Technische Universität Chemnitz, 09126 Chemnitz, Germany.,Center for Materials, Architectures and Integration of Nanomembranes (MAIN), 09126 Chemnitz, Germany
| | - Heinrich Lang
- Fakultät für Naturwissenschaften, Institut für Chemie, Professur Anorganische Chemie, Technische Universität Chemnitz, 09111 Chemnitz, Germany
| | - Michael Mehring
- Fakultät für Naturwissenschaften, Institut für Chemie, Professur Koordinationschemie, Technische Universität Chemnitz, 09111 Chemnitz, Germany.,Center for Materials, Architectures and Integration of Nanomembranes (MAIN), 09126 Chemnitz, Germany
| |
Collapse
|