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Alić J, Biljan I, Štefanić Z, Šekutor M. Preparation and characterization of non-aromatic ether self-assemblies on a HOPG surface. NANOTECHNOLOGY 2022; 33:355603. [PMID: 35545006 DOI: 10.1088/1361-6528/ac6e72] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 05/11/2022] [Indexed: 06/15/2023]
Abstract
On-surface self-assemblies of aromatic organic molecules have been widely investigated, but the characterization of analogous self-assemblies consisting of fully sp3-hybridized molecules remains challenging. The possible on-surface orientations of alkyl molecules not exclusively comprised of long alkyl chains are difficult to distinguish because of their inherently low symmetry and non-planar nature. Here, we present a detailed study of diamondoid ethers, structurally rigid and fully saturated molecules, which form uniform 2D monolayers on a highly oriented pyrolytic graphite (HOPG) surface. Using scanning tunneling microscopy, various computational tools, and x-ray structural analysis, we identified the most favorable on-surface orientations of these rigid ethers and accounted for the forces driving the self-organization process. The influence of the oxygen atom and London dispersion interactions were found to be responsible for the formation of the observed highly ordered 2D ether assemblies. Our findings provide insight into the on-surface properties and behavior of non-aromatic organic compounds and broaden our understanding of the phenomena characteristic of monolayers consisting of non-planar molecules.
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Affiliation(s)
- Jasna Alić
- Department of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička 54, 10 000 Zagreb, Croatia
| | - Ivana Biljan
- Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10 000 Zagreb, Croatia
| | - Zoran Štefanić
- Department of Physical Chemistry, Ruđer Bošković Institute, Bijenička 54, 10 000 Zagreb, Croatia
| | - Marina Šekutor
- Department of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička 54, 10 000 Zagreb, Croatia
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2
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Li J, Niesner D, Fauster T. Negative electron affinity of adamantane on Cu(111). JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:135001. [PMID: 33412528 DOI: 10.1088/1361-648x/abd99a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 01/07/2021] [Indexed: 06/12/2023]
Abstract
Photoelectron spectroscopy is used to show that thick adamantane films on Cu(111) have a negative electron affinity of -0.3 ± 0.1 eV. The ionization potential is obtained as 8.55 ± 0.15 eV resulting in a band gap of 8.9 ± 0.1 eV. For films of about 1.4 monolayer thickness the electron affinity is close to zero and the valence bands are shifted toward the Fermi energy due to charge transfer from Cu 3d bands.
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Affiliation(s)
- Jieru Li
- Lehrstuhl für Festkörperphysik, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstraße 7, 91058 Erlangen, Germany
| | - Daniel Niesner
- Lehrstuhl für Festkörperphysik, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstraße 7, 91058 Erlangen, Germany
| | - Thomas Fauster
- Lehrstuhl für Festkörperphysik, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstraße 7, 91058 Erlangen, Germany
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3
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Jantayod A, Doonyapisut D, Eknapakul T, Smith MF, Meevasana W. Resistive switching in diamondoid thin films. Sci Rep 2020; 10:19009. [PMID: 33149239 PMCID: PMC7642435 DOI: 10.1038/s41598-020-76093-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Accepted: 09/17/2020] [Indexed: 11/09/2022] Open
Abstract
The electrical transport properties of a thin film of the diamondoid adamantane, deposited on an Au/W substrate, were investigated experimentally. The current I, in applied potential V, from the admantane-thiol/metal heterstructure to a wire lead on its surface exhibited non-symmetric (diode-like) characteristics and a signature of resistive switching (RS), an effect that is valuable to non-volatile memory applications. I(V) follows a hysteresis curve that passes twice through [Formula: see text] linearly, indicating RS between two states with significantly different conductances, possibly due to an exotic mechanism.
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Affiliation(s)
- A Jantayod
- Department of Physics, Faculty of Science, Naresuan University, Phitsanulok, 65000, Thailand
- School of Physics, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand
| | - D Doonyapisut
- School of Physics, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand
| | - T Eknapakul
- School of Physics, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand
| | - M F Smith
- School of Physics, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand.
| | - W Meevasana
- School of Physics, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand
- Center of Excellence on Advanced Functional Materials, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand
- Thailand Center of Excellence in Physics (ThEP), MHESI, Bangkok, 10400, Thailand
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4
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Krongsuk S, Shinsuphan N, Amornkitbumrung V. Effect of the alkali metal (Li, Na, K) substitution on the geometric, electronic and optical properties of the smallest diamondoid: First principles calculations. Chin J Chem Eng 2019. [DOI: 10.1016/j.cjche.2018.05.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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5
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Sarap CS, Adhikari B, Meng S, Uhlig F, Fyta M. Optical Properties of Single- and Double-Functionalized Small Diamondoids. J Phys Chem A 2018; 122:3583-3593. [PMID: 29488764 DOI: 10.1021/acs.jpca.7b12519] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The rational control of the electronic and optical properties of small functionalized diamond-like molecules, the diamondoids, is the focus of this work. Specifically, we investigate the single- and double- functionalization of the lower diamondoids, adamantane, diamantane, and triamantane with -NH2 and -SH groups and extend the study to N-heterocyclic carbene (NHC) functionalization. On the basis of electronic structure calculations, we predict a significant change in the optical properties of these functionalized diamondoids. Our computations reveal that -NH2 functionalized diamondoids show UV photoluminescence similar to ideal diamondoids while -SH substituted diamondoids hinder the UV photoluminescence due to the labile nature of the S-H bond in the first excited state. This study also unveils that the UV photoluminescence nature of -NH2 diamondoids is quenched upon additional functionalization with the -SH group. The double-functionalized derivative can, thus, serve as a sensitive probe for biomolecule binding and sensing environmental changes. The preserved intrinsic properties of the NHC and the ideal diamondoid in NHC-functionalized-diamondoids suggests its utilization in diamondoid-based self-assembled monolayers (SAM), whose UV-photoluminescent signal would be determined entirely by the functionalized diamondoids. Our study aims to pave the path for tuning the properties of diamondoids through a selective choice of the type and number of functional groups. This will aid the realization of optoelectronic devices involving, for example, large-area SAM layers or diamondoid-functionalized electrodes.
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Affiliation(s)
- Chandra Shekar Sarap
- Institute for Computational Physics , Universität Stuttgart , Allmandring 3 , 70569 Stuttgart , Germany
| | - Bibek Adhikari
- Institute for Computational Physics , Universität Stuttgart , Allmandring 3 , 70569 Stuttgart , Germany
| | - Sheng Meng
- Institute of Physics , Chinese Academy of Sciences , Zhongguancun , Beijing 100190 , China
| | - Frank Uhlig
- Institute for Computational Physics , Universität Stuttgart , Allmandring 3 , 70569 Stuttgart , Germany
| | - Maria Fyta
- Institute for Computational Physics , Universität Stuttgart , Allmandring 3 , 70569 Stuttgart , Germany
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6
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Synthesis of 10-Methoxydiamantan-3-One. MOLBANK 2018. [DOI: 10.3390/m990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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7
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Wang YT, Zhao YJ, Liao JH, Yang XB. Theoretical investigations on diamondoids (C nH m, n = 10-41): Nomenclature, structural stabilities, and gap distributions. J Chem Phys 2018; 148:014306. [PMID: 29306287 DOI: 10.1063/1.5004437] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Combining the congruence check and the first-principles calculations, we have systematically investigated the structural stabilities and gap distributions of possible diamondoids (CnHm) with the carbon numbers (n) from 10 to 41. A simple method for the nomenclature is proposed, which can be used to distinguish and screen the candidates with high efficiency. Different from previous theoretical studies, the possible diamondoids can be enumerated according to our nomenclature, without any pre-determination from experiments. The structural stabilities and electronic properties have been studied by density functional based tight binding and first-principles methods, where a nearly linear correlation is found between the energy gaps obtained by these two methods. According to the formation energy of structures, we have determined the stable configurations as a function of chemical potential. The maximum and minimum energy gaps are found to be dominated by the shape of diamondoids for clusters with a given number of carbon atoms, while the gap decreases in general as the size increases due to the quantum confinement.
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Affiliation(s)
- Ya-Ting Wang
- Department of Physics, South China University of Technology, Guangzhou 510640, People's Republic of China
| | - Yu-Jun Zhao
- Department of Physics, South China University of Technology, Guangzhou 510640, People's Republic of China
| | - Ji-Hai Liao
- Department of Physics, South China University of Technology, Guangzhou 510640, People's Republic of China
| | - Xiao-Bao Yang
- Department of Physics, South China University of Technology, Guangzhou 510640, People's Republic of China
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8
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Gallmann L, Jordan I, Wörner HJ, Castiglioni L, Hengsberger M, Osterwalder J, Arrell CA, Chergui M, Liberatore E, Rothlisberger U, Keller U. Photoemission and photoionization time delays and rates. STRUCTURAL DYNAMICS (MELVILLE, N.Y.) 2017; 4:061502. [PMID: 29308414 PMCID: PMC5732014 DOI: 10.1063/1.4997175] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 11/02/2017] [Indexed: 05/20/2023]
Abstract
Ionization and, in particular, ionization through the interaction with light play an important role in fundamental processes in physics, chemistry, and biology. In recent years, we have seen tremendous advances in our ability to measure the dynamics of photo-induced ionization in various systems in the gas, liquid, or solid phase. In this review, we will define the parameters used for quantifying these dynamics. We give a brief overview of some of the most important ionization processes and how to resolve the associated time delays and rates. With regard to time delays, we ask the question: how long does it take to remove an electron from an atom, molecule, or solid? With regard to rates, we ask the question: how many electrons are emitted in a given unit of time? We present state-of-the-art results on ionization and photoemission time delays and rates. Our review starts with the simplest physical systems: the attosecond dynamics of single-photon and tunnel ionization of atoms in the gas phase. We then extend the discussion to molecular gases and ionization of liquid targets. Finally, we present the measurements of ionization delays in femto- and attosecond photoemission from the solid-vacuum interface.
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Affiliation(s)
- L Gallmann
- Department of Physics, Institute of Quantum Electronics, ETH Zurich, 8093 Zurich, Switzerland
| | - I Jordan
- Laboratorium für Physikalische Chemie, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
| | - H J Wörner
- Laboratorium für Physikalische Chemie, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zurich, Switzerland
| | - L Castiglioni
- Department of Physics, University of Zurich, 8057 Zürich, Switzerland
| | - M Hengsberger
- Department of Physics, University of Zurich, 8057 Zürich, Switzerland
| | - J Osterwalder
- Department of Physics, University of Zurich, 8057 Zürich, Switzerland
| | - C A Arrell
- Laboratoire de Spectroscopie Ultrarapide (LSU), and Lausanne Centre for Ultrafast Science (LACUS), ISIC-FSB, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - M Chergui
- Laboratoire de Spectroscopie Ultrarapide (LSU), and Lausanne Centre for Ultrafast Science (LACUS), ISIC-FSB, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - E Liberatore
- Laboratory of Computational Chemistry and Biochemistry, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - U Rothlisberger
- Laboratory of Computational Chemistry and Biochemistry, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - U Keller
- Department of Physics, Institute of Quantum Electronics, ETH Zurich, 8093 Zurich, Switzerland
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9
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Beake EOR, Tucker MG, Dove MT, Phillips AE. Orientational Disorder in Adamantane and Adamantanecarboxylic Acid. Chemphyschem 2017; 18:459-464. [PMID: 28000340 DOI: 10.1002/cphc.201601219] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Indexed: 11/11/2022]
Abstract
The molecular crystals adamantane, C10 H16 , and adamantanecarboxylic acid, C10 H15 COOH, undergo order-disorder phase transitions at 208 and 250 K, respectively. Reverse Monte Carlo refinement of total neutron scattering data collected from deuterated samples immediately above these phase transitions shows that the high-temperature phases are well described by models in which the adamantyl groups are disordered over two sites. No correlation between the orientations of neighbouring molecules is observed. These results demonstrate that the intermolecular potential energy of these materials depends strongly on the orientation of the reference molecule but only very weakly on the orientations of its neighbours.
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Affiliation(s)
- Edward O R Beake
- School of Physics and Astronomy, Queen Mary University of London, Mile End Road, London, E1 4NS, UK
| | - Matthew G Tucker
- ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Harwell Oxford, Didcot, OX11 0QX, UK.,Current address: Spallation Neutron Source, Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA
| | - Martin T Dove
- School of Physics and Astronomy, Queen Mary University of London, Mile End Road, London, E1 4NS, UK
| | - Anthony E Phillips
- School of Physics and Astronomy, Queen Mary University of London, Mile End Road, London, E1 4NS, UK
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10
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Adhikari B, Sivaraman G, Fyta M. Diamondoid-based molecular junctions: a computational study. NANOTECHNOLOGY 2016; 27:485207. [PMID: 27819796 DOI: 10.1088/0957-4484/27/48/485207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this work, we deal with the computational investigation of diamondoid-based molecular conductance junctions and their electronic transport properties. A small diamondoid is placed between the two gold electrodes of the nanogap and is covalently bonded to the gold electrodes through two different molecules, a thiol group and a N-heterocyclic carbene molecule. We have shown that the thiol linker is more efficient as it introduces additional electron paths for transport at lower energies. The influence of doping the diamondoid on the properties of the molecular junctions has been investigated. We find that using a nitrogen atom to dope the diamondoids leads to a considerable increase of the zero bias conductance. For the N-doped system we show an asymmetric feature of the I-V curve of the junctions resulting in rectification within a very small range of bias voltages. The rectifying nature is the result of the characteristic shift in the bias-dependent highest occupied molecular orbital state. In all cases, the efficiency of the device is manifested and is discussed in view of novel nanotechnological applications.
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Affiliation(s)
- Bibek Adhikari
- Institute for Computational Physics, Universität Stuttgart, Allmandring 3, D-70569 Stuttgart, Germany
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11
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12
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Hoc NT, Kushko AO, Fokin AA, Rodionov VN. Functional derivatives of diamantanone. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2016. [DOI: 10.1134/s1070428016080212] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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Adhikari B, Meng S, Fyta M. Carbene-mediated self-assembly of diamondoids on metal surfaces. NANOSCALE 2016; 8:8966-8975. [PMID: 27074198 DOI: 10.1039/c5nr08709k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
N-heterocyclic carbenes (NHC)s are emerging as an alternative class of molecules to thiol-based self-assembled monolayers (SAMs), making carbene-based SAMs much more stable under harsh environmental conditions. In this work, we have functionalized tiny diamondoids using NHCs in order to prepare highly stable carbene-mediated diamondoid SAMs on metal substrates. Using quantum-mechanical simulations and two different configurations for the carbene-functionalized diamondoids attached on gold, silver, and platinum surfaces we were able to study in detail these materials. Specifically, we focus on the binding characteristics, stability, and adsorption of the NHC-mediated diamondoid SAMs on the metal surfaces. A preferential binding to platinum surfaces was found, while a modulation of the work function in all cases was clear. The surface morphology of all NHC-based diamondoid SAMs was revealed through simulated STM images, which show characteristic features for each surface.
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Affiliation(s)
- Bibek Adhikari
- Institute for Computational Physics, Universität Stuttgart, Allmandring 3, 70569 Stuttgart, Germany.
| | - Sheng Meng
- Institute of Physics, Chinese Academy of Sciences, Zhongguancun, Beijing, 100190, China
| | - Maria Fyta
- Institute for Computational Physics, Universität Stuttgart, Allmandring 3, 70569 Stuttgart, Germany.
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14
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Balaban AT, Young DC, Plavec J, Pečnik K, Pompe M, Dahl JE, Carlson RMK. NMR spectral properties of the tetramantanes - nanometer-sized diamondoids. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2015; 53:1003-1018. [PMID: 26286373 DOI: 10.1002/mrc.4289] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Revised: 06/08/2015] [Accepted: 06/12/2015] [Indexed: 06/04/2023]
Abstract
Tetramantanes, and all diamondoid hydrocarbons, possess carbon frameworks that are superimposable upon the cubic diamond lattice. This characteristic is invaluable in assigning their (1)H and (13)C NMR spectra because it translates into repeating structural features, such as diamond-cage isobutyl moieties with distinctively complex methine to methylene signatures in COSY and HMBC data, connected to variable, but systematic linkages of methine and quaternary carbons. In all tetramantane C22H28 isomers, diamond-lattice structures result in long-range (4)JHH, W-coupling in COSY data, except where negated by symmetry; there are two highly symmetrical and one chiral tetramantane (showing seven (4)JHH). Isobutyl-cage methines of lower diamondoids and tetramantanes are the most shielded resonances in their (13)C spectra (<29.5 ppm). The isobutyl methylenes are bonded to additional methines and at least one quaternary carbon in the tetramantanes. W-couplings between these methines and methylenes clarify spin-network interconnections and detailed surface hydrogen stereochemistry. Vicinal couplings of the isobutyl methylenes reveal positions of the quaternary carbons: HMBC data then tie the more remote spin systems together. Diamondoid (13) C NMR chemical shifts are largely determined by α and β effects, however γ-shielding effects are important in [123]tetramantane. (1)H NMR chemical shifts generally correlate with numbers of 1,3-diaxial H-H interactions. Tight van der Waals contacts within [123]tetramantane's molecular groove, however, form improper hydrogen bonds, deshielding hydrogen nuclei inside the groove, while shielding those outside, indicated by Δδ of 1.47 ppm for geminal hydrogens bonded to C-3,21. These findings should be valuable in future NMR studies of diamondoids/nanodiamonds of increasing size.
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Affiliation(s)
- Alexandru T Balaban
- Texas A&M University at Galveston, Department of Marine Sciences, 200 Seawolf Parkway, Galveston, TX, 77553, USA
| | | | - Janez Plavec
- Slovenian NMR Centre, National Institute of Chemistry, Ljubljana, Slovenia
| | - Klemen Pečnik
- Slovenian NMR Centre, National Institute of Chemistry, Ljubljana, Slovenia
| | - Matevž Pompe
- University of Ljubljana, Faculty of Chemistry and Chemical Technology, Aškerčeva 5, 1000, Ljubljana, Slovenia
| | - Jeremy E Dahl
- Stanford Institute for Materials and Energy Sciences, Stanford University, 476 Lomita Mall, Stanford, CA, 94305, USA
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA
| | - Robert M K Carlson
- Stanford Institute for Materials and Energy Sciences, Stanford University, 476 Lomita Mall, Stanford, CA, 94305, USA
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA, 94025, USA
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15
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Banerjee S, Stüker T, Saalfrank P. Vibrationally resolved optical spectra of modified diamondoids obtained from time-dependent correlation function methods. Phys Chem Chem Phys 2015; 17:19656-69. [PMID: 26151912 DOI: 10.1039/c5cp02615f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Optical properties of modified diamondoids have been studied theoretically using vibrationally resolved electronic absorption, emission and resonance Raman spectra. A time-dependent correlation function approach has been used for electronic two-state models, comprising a ground state (g) and a bright, excited state (e), the latter determined from linear-response, time-dependent density functional theory (TD-DFT). The harmonic and Condon approximations were adopted. In most cases origin shifts, frequency alteration and Duschinsky rotation in excited states were considered. For other cases where no excited state geometry optimization and normal mode analysis were possible or desired, a short-time approximation was used. The optical properties and spectra have been computed for (i) a set of recently synthesized sp(2)/sp(3) hybrid species with C[double bond, length as m-dash]C double-bond connected saturated diamondoid subunits, (ii) functionalized (mostly by thiol or thione groups) diamondoids and (iii) urotropine and other C-substituted diamondoids. The ultimate goal is to tailor optical and electronic features of diamondoids by electronic blending, functionalization and substitution, based on a molecular-level understanding of the ongoing photophysics.
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Affiliation(s)
- Shiladitya Banerjee
- Institut für Chemie, Universität Potsdam, Karl-Liebknecht-Straße 24-25, D-14476 Potsdam-Golm, Germany.
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16
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Zhuk TS, Koso T, Pashenko AE, Hoc NT, Rodionov VN, Serafin M, Schreiner PR, Fokin AA. Toward an Understanding of Diamond sp2-Defects with Unsaturated Diamondoid Oligomer Models. J Am Chem Soc 2015; 137:6577-86. [DOI: 10.1021/jacs.5b01555] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Tatyana S. Zhuk
- Department
of Organic Chemistry, Kiev Polytechnic Institute, pr. Pobedy 37, 03056 Kiev, Ukraine
| | - Tatyana Koso
- Institute
of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, 35392 Giessen, Germany
| | - Alexander E. Pashenko
- Department
of Organic Chemistry, Kiev Polytechnic Institute, pr. Pobedy 37, 03056 Kiev, Ukraine
| | - Ngo Trung Hoc
- Department
of Organic Chemistry, Kiev Polytechnic Institute, pr. Pobedy 37, 03056 Kiev, Ukraine
| | - Vladimir N. Rodionov
- Department
of Organic Chemistry, Kiev Polytechnic Institute, pr. Pobedy 37, 03056 Kiev, Ukraine
| | - Michael Serafin
- Institute
of Inorganic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, 35392 Giessen, Germany
| | - Peter R. Schreiner
- Institute
of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, 35392 Giessen, Germany
| | - Andrey A. Fokin
- Department
of Organic Chemistry, Kiev Polytechnic Institute, pr. Pobedy 37, 03056 Kiev, Ukraine
- Institute
of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, 35392 Giessen, Germany
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17
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Adhikari B, Fyta M. Towards double-functionalized small diamondoids: selective electronic band-gap tuning. NANOTECHNOLOGY 2015; 26:035701. [PMID: 25549002 DOI: 10.1088/0957-4484/26/3/035701] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Diamondoids are nanoscale diamond-like cage structures with hydrogen terminations, which can occur in various sizes and with a diverse type of modifications. In this work, we focus on the structural alterations and the effect of doping and functionalization on the electronic properties of diamondoids, from the smallest adamantane to heptamantane. The results are based on quantum mechanical calculations. We perform a self-consistent study, starting with doping the smallest diamondoid, adamantane. Boron, nitrogen, silicon, oxygen, and phosphorus are chosen as dopants at sites which have been previously optimized and are also consistent with the literature. At a next step, an amine- and a thiol- group are separately used to functionalize the adamantane molecule. We mainly focus on a double functionalization of diamondoids up to heptamantane using both these atomic groups. The effect of isomeration in the case of tetramantane is also studied. We discuss the higher efficiency of a double-functionalization compared to doping or a single-functionalization of diamondoids in tuning the electronic properties, such as the electronic band-gap, of modified small diamondoids in view of their novel nanotechnological applications.
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Affiliation(s)
- Bibek Adhikari
- Institute for Computational Physics, University of Stuttgart, Allmandring 3, D-70569 Stuttgart, Germany
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18
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Clay WA, Dahl JEP, Carlson RMK, Melosh NA, Shen ZX. Physical properties of materials derived from diamondoid molecules. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2015; 78:016501. [PMID: 25551840 DOI: 10.1088/0034-4885/78/1/016501] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Diamondoids are small hydrocarbon molecules which have the same rigid cage structure as bulk diamond. They can be considered the smallest nanoparticles of diamond. They exhibit a mixture of properties inherited from bulk cubic diamond as well as a number of unique properties related to their size and structure. Diamondoids with different sizes and shapes can be separated and purified, enabling detailed studies of the effects of size and structure on the diamondoids' properties and also allowing the creation of chemically functionalized diamondoids which can be used to create new materials. Most notable among these new materials are self-assembled monolayers of diamondoid-thiols, which exhibit a number of unique electron emission properties.
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Affiliation(s)
- W A Clay
- Stanford Institute for Materials and Energy Science, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA. Geballe Laboratory for Advanced Materials, Department of Physics and Applied Physics, Stanford University, CA 94305
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19
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Maier FC, Sivaraman G, Fyta M. The role of a diamondoid as a hydrogen donor or acceptor in probing DNA nucleobases. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2014; 37:95. [PMID: 25339284 DOI: 10.1140/epje/i2014-14095-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Accepted: 10/01/2014] [Indexed: 06/04/2023]
Abstract
It has been shown that diamondoids can interact with DNA by forming relatively strong hydrogen bonds to DNA units, such as nucleobases. For this interaction to occur the diamondoids must be chemically modified in order to provide donor/acceptor groups for the hydrogen bond. We show here that the exact arrangement of an amine-modified adamantane with respect to a neighboring nucleobase has a significant influence on the strength of the hydrogen bond. Whether the diamondoid acts as a hydrogen donor or acceptor in the hydrogen binding to the nucleobase affects the electronic structure and thereby the electronic band-gaps of the diamondoid-nucleobase complex. In a donor arrangement of the diamondoid close to a nucleobase, the interaction energies are weak, but the electronic band-gaps differ significantly. Exactly the opposite trend is observed in an acceptor arrangement of the diamondoid. In each of these cases the frontier orbitals of the diamondoid and the nucleobase play a different role in the binding. The results are discussed in view of a diamondoid-based biosensing device.
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Affiliation(s)
- Frank C Maier
- Institute for Computational Physics, Universität Stuttgart, Allmandring 3, 70596, Stuttgart, Germany
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20
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Abstract
We predict the stability of diamondoids made up of boron and nitrogen instead of carbon atoms. The results are based on quantum-mechanical calculations within density functional theory (DFT) and show some very distinct features compared to the regular carbon-based diamondoids. These features are evaluated with respect to the energetics and electronic properties of the boron nitride diamondoids as compared to the respective properties of the carbon-based diamondoids. We find that BN-diamondoids are overall more stable than their respective C-diamondoid counterparts. The electronic band-gaps (E(g)) of the former are overall lower than those for the latter nanostructures but do not show a very distinct trend with their size. Contrary to the lower C-diamondoids, the BN-diamondoids are semiconducting and show a depletion of charge on the nitrogen site. Their differences in the distribution of the molecular orbitals, compared to their carbon-based counterparts, offer additional bonding and functionalization possibilities. These tiny BN-based nanostructures could potentially be used as nanobuilding blocks complementing or substituting the C-diamondoids, based on the desired properties. An experimental realization of boron nitride diamondoids remains to show their feasibility.
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Affiliation(s)
- Maria Fyta
- Institute for Computational Physics, Universität Stuttgart, Allmandring 3, 70569 Stuttgart, Germany
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21
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Computational study of adamantanes using floating basis functions. Struct Chem 2014. [DOI: 10.1007/s11224-014-0398-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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22
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Fokin AA, Zhuk TS, Pashenko AE, Osipov VV, Gunchenko PA, Serafin M, Schreiner PR. Functionalization of homodiamantane: oxygen insertion reactions without rearrangement with dimethyldioxirane. J Org Chem 2014; 79:1861-6. [PMID: 24433143 DOI: 10.1021/jo4026594] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Homodiamantane bromination and nitroxylation are accompanied by contraction of the seven-membered ring to give the corresponding substituted 1-diamantylmethyl derivatives. In contrast, CH-bond hydroxylations with dimethyldioxirane retain the cage and give both apically and medially substituted homodiamantanes. The product ratios are in accord with the barriers for the oxygen insertion computed with density functional theory methods only if solvation is included through a polarizable continuum model. B3LYP-D3 and M06-2X computations with a 6-31G(d,p) basis set on the oligomeric van der Waals complexes predict the potential of homodiamantane derivatives for surface modifications with conformationally slightly flexible diamondoid homologues.
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Affiliation(s)
- Andrey A Fokin
- Department of Organic Chemistry, Kiev Polytechnic Institute , pr. Pobedy 37, 03056 Kiev, Ukraine
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23
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Gunawan MA, Hierso JC, Poinsot D, Fokin AA, Fokina NA, Tkachenko BA, Schreiner PR. Diamondoids: functionalization and subsequent applications of perfectly defined molecular cage hydrocarbons. NEW J CHEM 2014. [DOI: 10.1039/c3nj00535f] [Citation(s) in RCA: 110] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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24
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Li FH, Fabbri JD, Yurchenko RI, Mileshkin AN, Hohman JN, Yan H, Yuan H, Tran IC, Willey TM, Bagge-Hansen M, Dahl JEP, Carlson RMK, Fokin AA, Schreiner PR, Shen ZX, Melosh NA. Covalent attachment of diamondoid phosphonic acid dichlorides to tungsten oxide surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:9790-9797. [PMID: 23855923 DOI: 10.1021/la401781e] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Diamondoids (nanometer-sized diamond-like hydrocarbons) are a novel class of carbon nanomaterials that exhibit negative electron affinity (NEA) and strong electron-phonon scattering. Surface-bound diamondoid monolayers exhibit monochromatic photoemission, a unique property that makes them ideal electron sources for electron-beam lithography and high-resolution electron microscopy. However, these applications are limited by the stability of the chemical bonding of diamondoids on surfaces. Here we demonstrate the stable covalent attachment of diamantane phosphonic dichloride on tungsten/tungsten oxide surfaces. X-ray photoelectron spectroscopy (XPS) and Fourier-transform infrared (FTIR) spectroscopy revealed that diamondoid-functionalized tungsten oxide films were stable up to 300-350 °C, a substantial improvement over conventional diamondoid thiolate monolayers on gold, which dissociate at 100-200 °C. Extreme ultraviolet (EUV) light stimulated photoemission from these diamondoid phosphonate monolayers exhibited a characteristic monochromatic NEA peak with 0.2 eV full width at half-maximum (fwhm) at room temperature, showing that the unique monochromatization property of diamondoids remained intact after attachment. Our results demonstrate that phosphonic dichloride functionality is a promising approach for forming stable diamondoid monolayers for elevated temperature and high-current applications such as electron emission and coatings in micro/nano electromechanical systems (MEMS/NEMS).
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Affiliation(s)
- Fei Hua Li
- Geballe Laboratory for Advanced Materials, Stanford University, 476 Lomita Mall, Stanford, California 94305, United States
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Stauss S, Shizuno T, Miyazoe H, Kiyooka E, Terashima K. Reaction yields of diamondoid synthesis by plasmas generated in supercritical xenon. ACTA ACUST UNITED AC 2013. [DOI: 10.14723/tmrsj.38.619] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sven Stauss
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo
| | - Tomoki Shizuno
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo
| | - Hiroyuki Miyazoe
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo
- Current address: IBM Thomas J. Watson Research Center
| | - Eiichiro Kiyooka
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo
| | - Kazuo Terashima
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo
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Fokin AA, Butova ED, Barabash AV, Huu NN, Tkachenko BA, Fokina NA, Schreiner PR. Preparative Synthesis of Vinyl Diamondoids. SYNTHETIC COMMUN 2012. [DOI: 10.1080/00397911.2012.667491] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Affiliation(s)
- Lukas Gallmann
- Physics Department, Eidgenössische Technische Hochschule Zürich, CH-8093 Zurich, Switzerland;
| | - Claudio Cirelli
- Physics Department, Eidgenössische Technische Hochschule Zürich, CH-8093 Zurich, Switzerland;
| | - Ursula Keller
- Physics Department, Eidgenössische Technische Hochschule Zürich, CH-8093 Zurich, Switzerland;
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Gunchenko PA, Fokin AA. Mechanisms of activation of C—H bonds in framework compounds: theory and experiment. THEOR EXP CHEM+ 2012. [DOI: 10.1007/s11237-012-9226-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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29
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Voskuhl J, Waller M, Bandaru S, Tkachenko BA, Fregonese C, Wibbeling B, Schreiner PR, Ravoo BJ. Nanodiamonds in sugar rings: an experimental and theoretical investigation of cyclodextrin–nanodiamond inclusion complexes. Org Biomol Chem 2012; 10:4524-30. [DOI: 10.1039/c2ob06915f] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Fokin AA, Gerbig D, Schreiner PR. σ/σ- and π/π-Interactions Are Equally Important: Multilayered Graphanes. J Am Chem Soc 2011; 133:20036-9. [DOI: 10.1021/ja206992j] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Andrey A. Fokin
- Department of Organic Chemistry, Kiev Polytechnic Institute, 37 Pobeda Avenue, Kiev 03056, Ukraine
| | - Dennis Gerbig
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, D-35392 Giessen, Germany
| | - Peter R. Schreiner
- Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, D-35392 Giessen, Germany
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Abstract
We prepared novel C5-modified triphosphates and phosphoramidites with a diamondoid functionally linked to the nucleobase. Using primer extension experiments with different length templates we investigated whether the modified triphosphates were enzymatically incorporated into DNA and whether they were further extended. We found that all three modified nucleotides can be incorporated into DNA using a single-nucleotide incorporation experiment, but only partially using two templates that demand for multiple incorporation of the modified nucleotides. The modified phosphoramidites were introduced into oligonucleotides utilizing DNA synthesizer technology. The occurring oligonucleotide structures were examined by circular dichroism (CD) and melting temperature (T(m)) measurements and were found to adapt similar helix conformations as their unmodified counterparts.
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Affiliation(s)
- Yan Wang
- Department of Chemistry, University of Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany
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32
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Heinemann N, Leissner T, Grunau J, Rohwer T, Andreyev O, Bauer M. Two-photon photoemission from ex-situ prepared butanethiol SAMs on Au (111). Chem Phys 2011. [DOI: 10.1016/j.chemphys.2011.03.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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