1
|
Yan Y, Jiang L, Zhang S, Shen X, Huang C. Specific “light-up” sensor made easy: An aggregation induced emission monomer for molecular imprinting. Biosens Bioelectron 2022; 205:114113. [DOI: 10.1016/j.bios.2022.114113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 01/13/2022] [Accepted: 02/16/2022] [Indexed: 11/02/2022]
|
2
|
Szymanski G, Suzuki Y, Ohba T, Sulikowski B, Góra-Marek K, Tarach KA, Koter S, Kowalczyk P, Ilnicka A, Zięba M, Echegoyen L, Terzyk AP, Plonska-Brzezinska ME. Linking the Defective Structure of Boron-Doped Carbon Nano-Onions with Their Catalytic Properties: Experimental and Theoretical Studies. ACS APPLIED MATERIALS & INTERFACES 2021; 13:51628-51642. [PMID: 34677930 PMCID: PMC8569677 DOI: 10.1021/acsami.1c12126] [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: 06/29/2021] [Accepted: 10/10/2021] [Indexed: 06/13/2023]
Abstract
Defects are widely present in nanomaterials, and they are recognized as the active sites that tune surface properties in the local region for catalysis. Recently, the theory linking defect structures and catalytic properties of nanocatalysts has been most commonly described. In this study, we prepared boron-doped carbon nano-onions (B-CNOs) by applying an annealing treatment of ultradispersed nanodiamond particles and amorphous boron. These experimental conditions guarantee doping of CNOs with boron atoms in the entire carbon nanostructure, thereby ensuring structural homogeneity. In our research, we discuss the correlations between defective structures of B-CNOs with their catalytic properties toward SO2 and tert-butanol dehydration. We show that there is a close relationship between the catalytic properties of the B-CNOs and the experimental conditions for their formation. It is not only the mass of the substrates used for the formation of B-CNOs that is crucial, that is, the mass ratio of NDs to amorphous B, but also the process, including temperature and gas atmosphere. As it was expected, all B-CNOs demonstrated significant catalytic activity in HSO3- oxidation. However, the subsequent annealing in an air atmosphere diminished their catalytic activity. Unfortunately, no direct relationship between the catalytic activity and the presence of heteroatoms on the B-CNO surface was observed. There was a linear dependence between catalytic activity and Raman reactivity factors for each of the B-CNO materials. In contrast to SO2 oxidation, the B-CNO-a samples showed higher catalytic activity in tert-butanol dehydration due to the presence of Brønsted and Lewis acid sites. The occurence of three types of boron-Lewis sites differing in electron donor properties was confirmed using quantitative infrared spectroscopic measurements of pyridine adsorption.
Collapse
Affiliation(s)
- Grzegorz
S. Szymanski
- Faculty
of Chemistry, Physicochemistry of Carbon Materials Research Group, Nicolaus Copernicus University in Torun, Gagarin Street 7, 87-100 Torun, Poland
| | - Yuka Suzuki
- Graduate
School of Science, Chiba University, 1-33 Yayoi, Inage, 263-8522 Chiba, Japan
| | - Tomonori Ohba
- Graduate
School of Science, Chiba University, 1-33 Yayoi, Inage, 263-8522 Chiba, Japan
| | - Bogdan Sulikowski
- Jerzy
Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Science, Niezapominajek 8, 30-239 Cracow, Poland
| | - Kinga Góra-Marek
- Faculty
of Chemistry, Jagiellonian University in
Kraków, Gronostajowa
Street 2, 30-387 Kraków, Poland
| | - Karolina A. Tarach
- Faculty
of Chemistry, Jagiellonian University in
Kraków, Gronostajowa
Street 2, 30-387 Kraków, Poland
| | - Stanislaw Koter
- Faculty
of Chemistry, Department of Physical Chemistry, Nicolaus Copernicus University in Torun, Gagarin Street 7, 87-100 Torun, Poland
| | - Piotr Kowalczyk
- School
of
Engineering and Information Technology, Murdoch University, Murdoch, Western Australia 6150, Australia
| | - Anna Ilnicka
- Faculty
of Chemistry, Nicolaus Copernicus University
in Torun, Gagarin Street 7, 87-100 Torun, Poland
| | - Monika Zięba
- Faculty
of Chemistry, Physicochemistry of Carbon Materials Research Group, Nicolaus Copernicus University in Torun, Gagarin Street 7, 87-100 Torun, Poland
| | - Luis Echegoyen
- Department
of Chemistry, University of Texas at El
Paso, 500 W. University Avenue, El Paso, Texas 79968, United
States
| | - Artur P. Terzyk
- Faculty
of Chemistry, Physicochemistry of Carbon Materials Research Group, Nicolaus Copernicus University in Torun, Gagarin Street 7, 87-100 Torun, Poland
| | - Marta E. Plonska-Brzezinska
- Department
of Organic Chemistry, Faculty of Pharmacy with the Division of Laboratory
Medicine, Medical University of Bialystok, Mickiewicza 2A, 15-222 Bialystok, Poland
| |
Collapse
|
3
|
Ludwig M, Hillebrecht H. First-principles calculation of 11B solid-state NMR parameters of boron-rich compounds II: the orthorhombic phases MgB 7 and MgB 12C 2 and the boron modification γ-B 28. Phys Chem Chem Phys 2021; 23:3883-3897. [PMID: 33539490 DOI: 10.1039/d0cp06073a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Based on the work on referencing 11B nuclear magnetic resonance (NMR) spectra for molecular icosahedral boranes and the subsequent transfer to the rhombohedral boron-rich borides of the α-rB12 type, we show that the magic angle spinning (MAS) NMR spectra of boron-rich borides with four or five symmetry-independent boron atoms can also be calculated. The calculations are performed on the level of density functional theory (DFT) using the gauge-including projector-augmented wave (GIPAW) approach. As model compounds o-MgB12C2 and MgB7 are used, for which the experimental spectra could be calculated in excellent agreement with a deviation of 1 to 2 ppm. Based on the calculations, the different B atoms can be assigned to the respective signals, taking into account the quadrupolar coupling constants Cq from computation of the electric field gradient (EFG) with its main axis Vzz. It is shown that due to the specific geometric conditions of icosahedra, the magnitudes of Vzz for the boron atoms involved in exohedral B-B bonds to neighbouring icosahedra depend only on the valence electron density of the bond critical point and the distance. This also applies to the bonds to the interstitial B2 unit in MgB7, but not to bonds to the heteroatom of the C2 dumbbell in o-MgB12C2. Both results are in line with our previous observations for the rhombohedral species (α-rB12; B12X2 with X = P, As, O). Finally, the spectrum of γ-B28 was calculated, whose structure also contains B12 icosahedra and interstitial B2 dumbbells. Here, a very similar bonding situation is found for the icosahedron, but the calculations show that the situation for the B2 unit is clearly different. In general, the only parameter that needs to be varied to fit calculated and measured spectra is the linewidth, as this cannot be calculated. For the cases of o-MgB12C2 and MgB7 signal areas are related to corresponding site multiplicities. A prerequisite for the successful application of the chosen method seems to be the presence of a semiconductor with a sufficiently large band gap, which is the case for the compounds investigated.
Collapse
Affiliation(s)
- Martin Ludwig
- Institut für Anorganische und Analytische Chemie, Albert-Ludwigs-Universität, Albertstr. 21, 79104 Freiburg, Germany.
| | - Harald Hillebrecht
- Institut für Anorganische und Analytische Chemie, Albert-Ludwigs-Universität, Albertstr. 21, 79104 Freiburg, Germany.
| |
Collapse
|
4
|
Ludwig M, Hillebrecht H. First-principles calculation of 11B solid-state NMR parameters of boron-rich compounds I: the rhombohedral boron modifications and B 12X 2 (X = P, As, O). Phys Chem Chem Phys 2021; 23:470-486. [PMID: 33320120 DOI: 10.1039/d0cp04061d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
In the present study, solid-state nuclear magnetic resonance (NMR) spectra under magic angle spinning conditions of the rhombohedral structures α-B and B12P2 are reported together with the corresponding parameter sets from first principles calculations on α-B B12X2 (X = P, As, O). With the combination of density functional theory (DFT) and the gauge-including projector-augmented wave (GIPAW) approach as the theoretical tools at hand the computed 11B parameters lead to unambiguous explanation of the measurements. Thereby, we overcome common obstacles of processing recorded NMR spectra of solid-state compounds with several crystallographic positions, in particular non-trivial signal assignments and parameter determination due to peak overlap or even unexpected intensity/area ratios. In fact, we find very good agreement between the theoretical results and measured spectra without applying fitting procedures. Using the Perdew-Burke-Ernzerhof (PBE) functional, the results of the common construction types for pseudopotentials and referencing methods for the chemical shift determination are compared. Suggestions and conclusions from experimental 11B NMR studies on parameters according to the icosahedral positions are critically discussed, for instance the early suspected correlation to chemical shifts is not confirmed. Regarding the electric field gradient (EFG) a detailed explanation for obtaining small deviations amongst all investigated structures of the icosahedral polar sites compared to the equatorial sites is given. Our results show an important link between the exohedral bonding situation of compounds with icosahedral structure elements and the main axis of the EFG and therefore, also measurable quadrupole coupling constants if certain geometrical conditions are fulfilled. Finally, this work also contributes to establishing the number of unique sites measured by solid-state NMR methods within the modification of β-B.
Collapse
Affiliation(s)
- Martin Ludwig
- Institut für Anorganische und Analytische Chemie, Albert-Ludwigs-Universität, Albertstr. 21, 79104 Freiburg, Germany.
| | | |
Collapse
|
5
|
Knitsch R, Han D, Anke F, Ibing L, Jiao H, Hansen MR, Beweries T. Fe(II) Hydride Complexes for the Homogeneous Dehydrocoupling of Hydrazine Borane: Catalytic Mechanism via DFT Calculations and Detailed Spectroscopic Characterization. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00053] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Robert Knitsch
- Institute for Physical Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstr. 28/30, 48149 Münster, Germany
| | - Delong Han
- Leibniz-Institut für Katalyse an der Universität Rostock e.V., Albert-Einstein-Strasse 29a, 18059 Rostock, Germany
| | - Felix Anke
- Leibniz-Institut für Katalyse an der Universität Rostock e.V., Albert-Einstein-Strasse 29a, 18059 Rostock, Germany
| | - Lukas Ibing
- Institute for Physical Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstr. 28/30, 48149 Münster, Germany
- MEET Battery Research
Center, Westfälische Wilhelms-Universität Münster, Corrensstr. 46, 48149 Münster, Germany
| | - Haijun Jiao
- Leibniz-Institut für Katalyse an der Universität Rostock e.V., Albert-Einstein-Strasse 29a, 18059 Rostock, Germany
| | - Michael Ryan Hansen
- Institute for Physical Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstr. 28/30, 48149 Münster, Germany
| | - Torsten Beweries
- Leibniz-Institut für Katalyse an der Universität Rostock e.V., Albert-Einstein-Strasse 29a, 18059 Rostock, Germany
| |
Collapse
|
6
|
Mykhailiv O, Brzezinski K, Sulikowski B, Olejniczak Z, Gras M, Lota G, Molina‐Ontoria A, Jakubczyk M, Echegoyen L, Plonska‐Brzezinska ME. Boron‐Doped Polygonal Carbon Nano‐Onions: Synthesis and Applications in Electrochemical Energy Storage. Chemistry 2017; 23:7132-7141. [DOI: 10.1002/chem.201700914] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Olena Mykhailiv
- Institute of Chemistry University of Bialystok Ciolkowskiego 1 K 15-245 Bialystok Poland
| | - Krzysztof Brzezinski
- Institute of Chemistry University of Bialystok Ciolkowskiego 1 K 15-245 Bialystok Poland
| | - Bogdan Sulikowski
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences Niezapominajek 8 30-239 Cracow Poland
| | - Zbigniew Olejniczak
- Institute of Nuclear Physics Polish Academy of Sciences Radzikowskiego 152 31-342 Cracow Poland
| | - Malgorzata Gras
- Poznan University of Technology Institute of Chemistry and Technical Electrochemistry Berdychowo 4 60-965 Poznan Poland
| | - Grzegorz Lota
- Poznan University of Technology Institute of Chemistry and Technical Electrochemistry Berdychowo 4 60-965 Poznan Poland
| | | | - Michal Jakubczyk
- Faculty of Chemistry Warsaw University of Technology Noakowskiego 3 00-664 Warsaw Poland
| | - Luis Echegoyen
- Department of Chemistry University of Texas at El Paso 500 W. University Ave. El Paso TX 79968 USA
| | | |
Collapse
|