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Wang Y, Zhu G, Wang M, Wu J, Fu D, Xie Q, Shi Q, Xu C, Han Y. Discovery of novel cage compounds of diamondoids using multi-dimensional mass spectrometry. Chem Eng Sci 2023. [DOI: 10.1016/j.ces.2023.118677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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George MAR, Dopfer O. Opening of the Diamondoid Cage upon Ionization Probed by Infrared Spectra of the Amantadine Cation Solvated by Ar, N 2 , and H 2 O. Chemistry 2022; 28:e202200577. [PMID: 35611807 PMCID: PMC9400954 DOI: 10.1002/chem.202200577] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Indexed: 01/18/2023]
Abstract
Radical cations of diamondoids, a fundamental class of very stable cyclic hydrocarbon molecules, play an important role in their functionalization reactions and the chemistry of the interstellar medium. Herein, we characterize the structure, energy, and intermolecular interaction of clusters of the amantadine radical cation (Ama+, 1‐aminoadamantane) with solvent molecules of different interaction strength by infrared photodissociation (IRPD) spectroscopy of mass‐selected Ama+Ln clusters, with L=Ar (n≤3) and L=N2 and H2O (n=1), and dispersion‐corrected density functional theory calculations (B3LYP−D3/cc‐pVTZ). Three isomers of Ama+ generated by electron ionization are identified by the vibrational properties of their rather different NH2 groups. The ligands bind preferentially to the acidic NH2 protons, and the strength of the NH…L ionic H‐bonds are probed by the solvation‐induced red‐shifts in the NH stretch modes. The three Ama+ isomers include the most abundant canonical cage isomer (I) produced by vertical ionization, which is separated by appreciable barriers from two bicyclic distonic iminium ions obtained from cage‐opening (primary radical II) and subsequent 1,2 H‐shift (tertiary radical III), the latter of which is the global minimum on the Ama+ potential energy surface. The effect of solvation on the energetics of the potential energy profile revealed by the calculations is consistent with the observed relative abundance of the three isomers. Comparison to the adamantane cation indicates that substitution of H by the electron‐donating NH2 group substantially lowers the barriers for the isomerization reaction.
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Affiliation(s)
| | - Otto Dopfer
- Institut für Optik und Atomare PhysikTechnische Universität BerlinHardenbergstr. 3610623BerlinGermany
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Mears KL, Stennett CR, Fettinger JC, Vasko P, Power PP. Inhibition of Alkali Metal Reduction of 1-Adamantanol by London Dispersion Effects. Angew Chem Int Ed Engl 2022; 61:e202201318. [PMID: 35255185 DOI: 10.1002/anie.202201318] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Indexed: 12/17/2022]
Abstract
A series of alkali metal 1-adamantoxide (OAd1 ) complexes of formula [M(OAd1 )(HOAd1 )2 ], where M=Li, Na or K, were synthesised by reduction of 1-adamantanol with excess of the alkali metal. The syntheses indicated that only one out of every three HOAd1 molecules was reduced. An X-ray diffraction study of the sodium derivative shows that the complex features two unreduced HOAd1 donors as well as the reduced alkoxide (OAd1 ), with the Ad1 fragments clustered together on the same side of the NaO3 plane, contrary to steric considerations. This is the first example of an alkali metal reduction of an alcohol that is inhibited from completion due to the formation of the [M(OAd1 )(HOAd1 )2 ] complexes, stabilized by London dispersion effects. NMR spectroscopic studies revealed similar structures for the lithium and potassium derivatives. Computational analyses indicate that decisive London dispersion effects in the molecular structure are a consequence of the many C-H⋅⋅⋅H-C interactions between the OAd1 groups.
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Affiliation(s)
- Kristian L Mears
- Department of Chemistry, University of California, One Shields Avenue, Davis, CA 95616, USA
| | - Cary R Stennett
- Department of Chemistry, University of California, One Shields Avenue, Davis, CA 95616, USA
| | - James C Fettinger
- Department of Chemistry, University of California, One Shields Avenue, Davis, CA 95616, USA
| | - Petra Vasko
- Department of Chemistry, University of Helsinki, P.O. Box 55 (A. I. Virtasen aukio 1), 00014, Helsinki, Finland
| | - Philip P Power
- Department of Chemistry, University of California, One Shields Avenue, Davis, CA 95616, USA
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Mears KL, Stennett CR, Fettinger JC, Vasko P, Power PP. Inhibition of Alkali Metal Reduction of 1‐Adamantanol by London Dispersion Effects. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kristian L. Mears
- Department of Chemistry University of California One Shields Avenue Davis CA 95616 USA
| | - Cary R. Stennett
- Department of Chemistry University of California One Shields Avenue Davis CA 95616 USA
| | - James C. Fettinger
- Department of Chemistry University of California One Shields Avenue Davis CA 95616 USA
| | - Petra Vasko
- Department of Chemistry University of Helsinki P.O. Box 55 (A. I. Virtasen aukio 1) 00014 Helsinki Finland
| | - Philip P. Power
- Department of Chemistry University of California One Shields Avenue Davis CA 95616 USA
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Mzyk A, Ong Y, Ortiz Moreno AR, Padamati SK, Zhang Y, Reyes-San-Martin CA, Schirhagl R. Diamond Color Centers in Diamonds for Chemical and Biochemical Analysis and Visualization. Anal Chem 2022; 94:225-249. [PMID: 34841868 DOI: 10.1021/acs.analchem.1c04536] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Aldona Mzyk
- University Medical Center Groningen, Groningen University, Antonius Deusinglaan 1, 9713 AW Groningen, The Netherlands
- Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta 25, 30-059 Krakow, Poland
| | - Yori Ong
- University Medical Center Groningen, Groningen University, Antonius Deusinglaan 1, 9713 AW Groningen, The Netherlands
| | - Ari R Ortiz Moreno
- University Medical Center Groningen, Groningen University, Antonius Deusinglaan 1, 9713 AW Groningen, The Netherlands
| | - Sandeep K Padamati
- University Medical Center Groningen, Groningen University, Antonius Deusinglaan 1, 9713 AW Groningen, The Netherlands
| | - Yue Zhang
- University Medical Center Groningen, Groningen University, Antonius Deusinglaan 1, 9713 AW Groningen, The Netherlands
| | - Claudia A Reyes-San-Martin
- University Medical Center Groningen, Groningen University, Antonius Deusinglaan 1, 9713 AW Groningen, The Netherlands
| | - Romana Schirhagl
- University Medical Center Groningen, Groningen University, Antonius Deusinglaan 1, 9713 AW Groningen, The Netherlands
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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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Barua SR, Quanz H, Olbrich M, Schreiner PR, Trauner D, Allen WD. Polytwistane. Chemistry 2014; 20:1638-45. [PMID: 24402729 DOI: 10.1002/chem.201303081] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2013] [Revised: 10/26/2013] [Indexed: 11/09/2022]
Abstract
Twistane, C10H16, is a classic D2-symmetric chiral hydrocarbon that has been studied for decades due to its fascinating stereochemical and thermodynamic properties. Here we propose and analyze in detail the contiguous linear extension of twistane with ethano (ethane-1,2-diyl) bridges to create a new chiral, C2-symmetric hydrocarbon nanotube called polytwistane. Polytwistane, (CH)n, has the same molecular formula as polyacetylene but is composed purely of C(sp(3))-H units, all of which are chemically equivalent. The polytwistane nanotube has the smallest inner diameter (2.6 Å) of hydrocarbons considered to date. A rigorous topological analysis of idealized polytwistane and a C236H242 prototype optimized by B3LYP density functional theory reveals that the polymer has a nonrepeating, alternating σ-helix, with an irrational periodicity parameter and an instantaneous rise (or lead) angle near 15 °. A theoretical analysis utilizing homodesmotic equations and explicit computations as high as CCSD(T)/cc-pVQZ yields the enthalpies of formation Delta(f)H(0)°(twistane) = -1.7 kcal mol(-1) and Delta(f)H(0)°(polytwistane) = +1.28 kcal (mol CH)(-1), demonstrating that the hypothetical formation of polytwistane from acetylene is highly exothermic. Hence, polytwistane is synthetically viable both on thermodynamic grounds and also because no obvious pathways exist for its rearrangement to lower-lying isomers. The present analysis should facilitate the preparation and characterization of this new chiral hydrocarbon nanotube.
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Affiliation(s)
- Shiblee R Barua
- Center for Computational Chemistry and Department of Chemistry, University of Georgia, Athens, GA 30602 (USA)
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Zhang J, Zhu Z, Feng Y, Ishiwata H, Miyata Y, Kitaura R, Dahl JEP, Carlson RMK, Fokina NA, Schreiner PR, Tománek D, Shinohara H. Evidence of Diamond Nanowires Formed inside Carbon Nanotubes from Diamantane Dicarboxylic Acid. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201209192] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Zhang J, Zhu Z, Feng Y, Ishiwata H, Miyata Y, Kitaura R, Dahl JEP, Carlson RMK, Fokina NA, Schreiner PR, Tománek D, Shinohara H. Evidence of Diamond Nanowires Formed inside Carbon Nanotubes from Diamantane Dicarboxylic Acid. Angew Chem Int Ed Engl 2013; 52:3717-21. [DOI: 10.1002/anie.201209192] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Revised: 12/17/2012] [Indexed: 11/07/2022]
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Patzer A, Schütz M, Möller T, Dopfer O. Infrared Spectrum and Structure of the Adamantane Cation: Direct Evidence for Jahn-Teller Distortion. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201108937] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Patzer A, Schütz M, Möller T, Dopfer O. Infrared Spectrum and Structure of the Adamantane Cation: Direct Evidence for Jahn-Teller Distortion. Angew Chem Int Ed Engl 2012; 51:4925-9. [DOI: 10.1002/anie.201108937] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2011] [Indexed: 11/08/2022]
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