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Shi W, Liang K, Wang R, Liu J, Lu C. Biased Symmetry Breaking in the Formation of Intercalated Layered Double Hydroxides: toward Control of Homochiral Supramolecular Assembly. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2303497. [PMID: 37376810 DOI: 10.1002/smll.202303497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 06/20/2023] [Indexed: 06/29/2023]
Abstract
Homochiral supramolecular assembly (HSA) based on achiral molecules has provided important clues to understand the origin of biological homochirality from the aspect of symmetry breaking. However, planar achiral molecules still face the challenge of forming HSA due to the lack of driving force for twisted stacking, which is a prerequisite for homochirality. Here, with the benefit of the formation of 2D intercalated layered double hydroxide (LDH, host-guest nanomaterials) in vortex motion, planar achiral guest molecules can form the chiral units with spatially asymmetrical structure in the confinement space of LDH. Once the LDH is removed, these chiral units are in a thermodynamic non-equilibrium state, which can be amplified to HSA by self-replicating. Especially, the homochiral bias can be predicted in advance by controlling the vortex direction. Therefore, this study breaks the bottleneck of complicated molecular design and provides a new technology to achieve HSA made of planar achiral molecules with definite handedness.
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Affiliation(s)
- Wenying Shi
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, P. Box 98, Beijing, 100029, P. R. China
| | - Kaixiang Liang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, P. Box 98, Beijing, 100029, P. R. China
| | - Ruixing Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, P. Box 98, Beijing, 100029, P. R. China
| | - Jing Liu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, P. Box 98, Beijing, 100029, P. R. China
| | - Chao Lu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, P. Box 98, Beijing, 100029, P. R. China
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2
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Ghaani MR, English NJ, Allen CCR. Magnetic-Field Manipulation of Naturally Occurring Microbial Chiral Peptides to Regulate Gas-Hydrate Formation. J Phys Chem Lett 2020; 11:9079-9085. [PMID: 33047960 DOI: 10.1021/acs.jpclett.0c02347] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Clathrate hydrates are nonstoichiometric crystalline inclusion compounds, wherein a water host lattice entraps small guest molecules in cavities, with methane hydrates being the most widespread in nature. Recent studies have shown that proteins and polypeptides produced by micro-organisms can accelerate methane-hydrate formation. However, the role of magnetic fields and chirality in such phenomena is heretofore unclear. Here, we find prima facie evidence of differently oriented magnetic fields of varying strength showing intricate control on the hydrate-formation kinetics by R and S versions of a prototypical aromatic peptide derived from a naturally occurring, hydrate-promoting source. We also discuss the wider implications of these results on chirality in the biosphere and hydrates in the environment.
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Affiliation(s)
- Mohammad Reza Ghaani
- School of Chemical and Bioprocess Engineering, University College Dublin, Belfield, Dublin 4, Ireland
| | - Niall J English
- School of Chemical and Bioprocess Engineering, University College Dublin, Belfield, Dublin 4, Ireland
| | - Christopher C R Allen
- School of Biological Sciences, Queen's University Belfast, University Road, Belfast BT7 1NN, Northern Ireland
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Abstract
The origin of biological homochirality, e.g., life selects the L-amino acids and D-sugar as molecular component, still remains a big mystery. It is suggested that mirror symmetry breaking plays an important role. Recent researches show that symmetry breaking can also occur at a supramolecular level, where the non-covalent bond was crucial. In these systems, equal or unequal amount of the enantiomeric nanoassemblies could be formed from achiral molecules. In this paper, we presented a brief overview regarding the symmetry breaking from dispersed system to gels, solids, and at interfaces. Then we discuss the rational manipulation of supramolecular chirality on how to induce and control the homochirality in the self-assembly system. Those physical control methods, such as Viedma ripening, hydrodynamic macro- and micro-vortex, superchiral light, and the combination of these technologies, are specifically discussed. It is hoped that the symmetry breaking at a supramolecular level could provide useful insights into the understanding of natural homochirality and further designing as well as controlling of functional chiral materials.
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4
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Nucleophilic substitution vs elimination reaction of bisulfide ions with substituted methanes: exploration of chiral selectivity by stereodirectional first-principles dynamics and transition state theory. J Mol Model 2019; 25:227. [PMID: 31317347 DOI: 10.1007/s00894-019-4126-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 07/07/2019] [Indexed: 10/26/2022]
Abstract
Control of molecular orientation is emerging as crucial for the characterization of the stereodynamics of kinetics processes beyond structural stereochemistry. The special role played in chiral discrimination phenomena has been particularly emphasized by Aquilanti and collaborators after their extensive probes of experimental control of molecular alignment and orientation. In this work, the manifestation of the Aquilanti mechanism has been demonstrated for the first time in first-principles molecular dynamics simulations: stationary points characterized on potential energy surfaces have been calculated for the study of chemical reactions occurring between the bisulfide anion HS- and oriented prototypical chiral molecules CHFXY (where X = CH3 or CN and Y = Cl or I). The important reaction channels are those corresponding to bimolecular nucleophilic substitution (SN2) and to bimolecular elimination (E2): their relative role has been assessed and alternative pathways due to the mirror forms of the oriented chiral molecule are revealed by the different reactivity of the two enantiomers of CHFCNI in SN2 reaction.
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Lombardi A, Palazzetti F. Chirality in molecular collision dynamics. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:063003. [PMID: 29350184 DOI: 10.1088/1361-648x/aaa1c8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Chirality is a phenomenon that permeates the natural world, with implications for atomic and molecular physics, for fundamental forces and for the mechanisms at the origin of the early evolution of life and biomolecular homochirality. The manifestations of chirality in chemistry and biochemistry are numerous, the striking ones being chiral recognition and asymmetric synthesis with important applications in molecular sciences and in industrial and pharmaceutical chemistry. Chiral discrimination phenomena, due to the existence of two enantiomeric forms, very well known in the case of interaction with light, but still nearly disregarded in molecular collision studies. Here we review some ideas and recent advances about the role of chirality in molecular collisions, designing and illustrating molecular beam experiments for the demonstration of chiral effects and suggesting a scenario for a stereo-directional origin of chiral selection.
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Affiliation(s)
- Andrea Lombardi
- Dipartimento di Chimica, Biologia e Biotecnologie, Università di Perugia, Via Elce di Sotto 8, 06123, Perugia, Italy. Consortium for Computational Molecular and Materials Sciences (CMS)2, Via Elce di Sotto, 8, 06123 Perugia, Italy
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Zagami R, Castriciano MA, Romeo A, Scolaro LM. Spectroscopic investigations on chiral J-aggregates induced by tartaric acid in alcoholic solution. J PORPHYR PHTHALOCYA 2017. [DOI: 10.1142/s1088424617500183] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Chiral J-aggregates of meso-tetrakis(4-sulfonatophenyl)porphyrin (TPPS[Formula: see text] have been obtained in ethanol solution triggered by addition of both enantiomeric forms of tartaric acid. A detailed spectroscopic investigation has been performed on aggregates obtained by a well-defined mixture protocol of reactants. Our findings show as both aggregation process and induced supramolecular chirality essentially depend on the concentration of the reactants. Contrary to what occurs in aqueous solution, TPPS4 in ethanol solution shows: (i) at low porphyrin concentration, an aggregation behavior characterized by a L-tartaric acid threshold whereas the D-tartaric does not work even at high concentrations, so revealing an enantiomeric discrimination; (ii) at high porphyrin concentration, a large kinetic discrimination of D- vs. L-enantiomer.
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Affiliation(s)
- Roberto Zagami
- CNR-ISMN, Istituto per lo Studio dei Materiali Nanostrutturati, c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, V.le F. Stagno D’Alcontres 31, 98166 Messina, Italy
| | - Maria Angela Castriciano
- CNR-ISMN, Istituto per lo Studio dei Materiali Nanostrutturati, c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, V.le F. Stagno D’Alcontres 31, 98166 Messina, Italy
| | - Andrea Romeo
- CNR-ISMN, Istituto per lo Studio dei Materiali Nanostrutturati, c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, V.le F. Stagno D’Alcontres 31, 98166 Messina, Italy
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali and C.I.R.C.M.S.B., V.le F. Stagno D’Alcontres 31, 98166 Messina, Italy
| | - Luigi Monsù Scolaro
- CNR-ISMN, Istituto per lo Studio dei Materiali Nanostrutturati, c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, V.le F. Stagno D’Alcontres 31, 98166 Messina, Italy
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali and C.I.R.C.M.S.B., V.le F. Stagno D’Alcontres 31, 98166 Messina, Italy
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7
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Ribo JM, El-Hachemi Z, Arteaga O, Canillas A, Crusats J. Hydrodynamic Effects in Soft-matter Self-assembly: The Case of J-Aggregates of Amphiphilic Porphyrins. CHEM REC 2017; 17:713-724. [DOI: 10.1002/tcr.201600133] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Josep M. Ribo
- Department of Inorganic and Organic Chemistry; University of Barcelona (UB); c. Martí I Franques 1 08- Barcelona Catalonia Spain
- Institute of Cosmos Sciences; IEEC-UB; c. Martí I Franques 1 08- Barcelona Catalonia Spain
| | - Zoubir El-Hachemi
- Department of Inorganic and Organic Chemistry; University of Barcelona (UB); c. Martí I Franques 1 08- Barcelona Catalonia Spain
- Institute of Cosmos Sciences; IEEC-UB; c. Martí I Franques 1 08- Barcelona Catalonia Spain
| | - Oriol Arteaga
- Department of Applied Physics; University of Barcelona (UB); c. Martí I Franques 1 08- Barcelona Catalonia Spain
- FEMAN Group; Institute of Nanoscience and Nanotechnology (IN2UB); c. Martí I Franques 1 08- Barcelona Catalonia Spain
| | - Adolf Canillas
- Department of Applied Physics; University of Barcelona (UB); c. Martí I Franques 1 08- Barcelona Catalonia Spain
- FEMAN Group; Institute of Nanoscience and Nanotechnology (IN2UB); c. Martí I Franques 1 08- Barcelona Catalonia Spain
| | - Joaquim Crusats
- Department of Inorganic and Organic Chemistry; University of Barcelona (UB); c. Martí I Franques 1 08- Barcelona Catalonia Spain
- Institute of Cosmos Sciences; IEEC-UB; c. Martí I Franques 1 08- Barcelona Catalonia Spain
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8
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Mineo P, Villari V, Scamporrino E, Micali N. New Evidence about the Spontaneous Symmetry Breaking: Action of an Asymmetric Weak Heat Source. J Phys Chem B 2015; 119:12345-53. [PMID: 26315854 DOI: 10.1021/acs.jpcb.5b07199] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
In the present study, we show how, in a stagnant water solution of uncharged aggregated achiral porphyrin-based molecules, a mirror-symmetry breaking (SB) can be induced and controlled by means of a weak asymmetric thermal gradient. In particular, it is shown that the optical activity of the aggregate porphyrin solution can be generated and reversed, in sign, only acting on the thermal ramp direction (heating or cooling). In order to avoid data misinterpretation, the aggregate structure modifications with the temperature change and the linear dichroism contribution to circular dichroism spectra were evaluated. A model simulation, using a finite element analysis approach describing the thermal flows, shows that small thermal gradients are able to give rise to asymmetric heat flow. The results reported here can be considered new evidence about the spontaneous symmetry breaking phenomenon induced by very weak forces having an important role in the natural chiral selective processes.
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Affiliation(s)
- Placido Mineo
- Dipartimento di Scienze Chimiche and I.N.S.T.M. UdR of Catania, Università di Catania , Viale Andrea Doria 6, I-95125 Catania, Italy.,CNR-IPCF Istituto per i Processi Chimico-Fisici , Viale F. Stagno d'Alcontres 37, I-98158 Messina, Italy
| | - Valentina Villari
- CNR-IPCF Istituto per i Processi Chimico-Fisici , Viale F. Stagno d'Alcontres 37, I-98158 Messina, Italy
| | - Emilio Scamporrino
- Dipartimento di Scienze Chimiche and I.N.S.T.M. UdR of Catania, Università di Catania , Viale Andrea Doria 6, I-95125 Catania, Italy
| | - Norberto Micali
- CNR-IPCF Istituto per i Processi Chimico-Fisici , Viale F. Stagno d'Alcontres 37, I-98158 Messina, Italy
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9
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Mineo P, Villari V, Scamporrino E, Micali N. Supramolecular chirality induced by a weak thermal force. SOFT MATTER 2014; 10:44-47. [PMID: 24651848 DOI: 10.1039/c3sm52322e] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We show that the unexpected chirality of aggregated structures based on an uncharged achiral porphyrin system originates from small temperature gradients that act as an asymmetrical physical perturbation; the consequent thermal force gives rise to the thermophoretic motion of the aggregates. We establish that the induced optical activity can be controlled, and even vanished, by minimizing the thermal force.
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Affiliation(s)
- Placido Mineo
- Dipartimento di Scienze Chimiche and I.N.S.T.M. UdR of Catania, University of Catania, Viale Andrea Doria 6, I-95125 Catania, Italy.
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10
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Kasai T, Che DC, Okada M, Tsai PY, Lin KC, Palazzetti F, Aquilanti V. Directions of chemical change: experimental characterization of the stereodynamics of photodissociation and reactive processes. Phys Chem Chem Phys 2014; 16:9776-90. [DOI: 10.1039/c4cp00464g] [Citation(s) in RCA: 34] [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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11
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Romeo A, Castriciano MA, Occhiuto I, Zagami R, Pasternack RF, Scolaro LM. Kinetic control of chirality in porphyrin J-aggregates. J Am Chem Soc 2013; 136:40-3. [PMID: 24341960 DOI: 10.1021/ja410514k] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Detailed kinetic investigations demonstrate the fundamental role of kinetic parameters in the expression and transmission of chirality in supramolecular systems. The rate of the aggregation process leading to the formation of J-aggregates strongly affects the size of these nanoassemblies and the chiral induction.
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Affiliation(s)
- Andrea Romeo
- Istituto per lo Studio dei Materiali Nanostrutturati ISMN-CNR and †Dipartimento di Scienze Chimiche, University of Messina and CIRCMSB , 98166 Messina, Italy
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12
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Aligned molecules: chirality discrimination in photodissociation and in molecular dynamics. RENDICONTI LINCEI-SCIENZE FISICHE E NATURALI 2013. [DOI: 10.1007/s12210-013-0248-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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14
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Ueda T, Masuko S, Araoka F, Ishikawa K, Takezoe H. A General Method for the Enantioselective Formation of Helical Nanofilaments. Angew Chem Int Ed Engl 2013; 52:6863-6. [DOI: 10.1002/anie.201300658] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Indexed: 11/11/2022]
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15
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Ueda T, Masuko S, Araoka F, Ishikawa K, Takezoe H. A General Method for the Enantioselective Formation of Helical Nanofilaments. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201300658] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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16
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Ribó JM, El-Hachemi Z, Crusats J. Effects of flows in auto-organization, self-assembly, and emergence of chirality. RENDICONTI LINCEI-SCIENZE FISICHE E NATURALI 2013. [DOI: 10.1007/s12210-013-0233-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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18
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Barreto PR, Albernaz AF, Capobianco A, Palazzetti F, Lombardi A, Grossi G, Aquilanti V. Potential energy surfaces for interactions of H2O with H2, N2 and O2: A hyperspherical harmonics representation, and a minimal model for the H2O–rare-gas-atom systems. COMPUT THEOR CHEM 2012. [DOI: 10.1016/j.comptc.2011.12.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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19
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Electrostatic hexapole state-selection of the asymmetric-top molecule propylene oxide: Rotational and orientational distributions. Chem Phys 2012. [DOI: 10.1016/j.chemphys.2011.11.020] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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20
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Selection of supramolecular chirality by application of rotational and magnetic forces. Nat Chem 2012; 4:201-7. [PMID: 22354434 DOI: 10.1038/nchem.1264] [Citation(s) in RCA: 200] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Accepted: 01/04/2012] [Indexed: 11/09/2022]
Abstract
Many essential biological molecules exist only in one of two possible mirror-image structures, either because they possess a chiral unit or through their structure (helices, for example, are intrinsically chiral), but so far the origin of this homochirality has not been unraveled. Here we demonstrate that the handedness of helical supramolecular aggregates formed by achiral molecules can be directed by applying rotational, gravitational and orienting forces during the self-assembly process. In this system, supramolecular chirality is determined by the relative directions of rotation and magnetically tuned effective gravity, but the magnetic orientation of the aggregates is also essential. Applying these external forces only during the nucleation step of the aggregation is sufficient to achieve chiral selection. This result shows that an almost instantaneous chiral perturbation can be transferred and amplified in growing supramolecular self-assemblies, and provides evidence that a falsely chiral influence is able to induce absolute enantioselection.
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21
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Lee HN, Chao I, Su TM. Asymmetry in the internal energies of the optical rotamers of 1-bromo-2-chloroethane in oriented-molecule/surface scattering: A classical molecular dynamics study. Chem Phys Lett 2011. [DOI: 10.1016/j.cplett.2011.09.095] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Baei MT, Moradi AV, Torabi P, Moghimi M. Adsorption properties of H2O2 trapped inside a boron phosphide nanotube. MONATSHEFTE FUR CHEMIE 2011. [DOI: 10.1007/s00706-011-0548-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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24
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Aligned molecular collisions and a stereodynamical mechanism for selective chirality. RENDICONTI LINCEI-SCIENZE FISICHE E NATURALI 2011. [DOI: 10.1007/s12210-011-0123-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Elango M, Maciel GS, Palazzetti F, Lombardi A, Aquilanti V. Quantum chemistry of C(3)H(6)O molecules: structure and stability, isomerization pathways, and chirality changing mechanisms. J Phys Chem A 2010; 114:9864-74. [PMID: 20575571 DOI: 10.1021/jp1034618] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Electronic structure calculations were carried out to study the various isomers of formula C(3)H(6)O, as a part of our current quantum chemical and dynamical approaches to intra- and intermolecular kinetics for the C(n)H(2n)O (n = 1, 2, 3) molecules. The usefulness of the GRRM (global reaction route mapping) program developed by Ohno and Maeda in predicting the structure of all isomers and of the transition states connecting them is fully exploited. All the isomers are identified as local minima on the MP2/CC-PVDZ potential energy surface. Acetone is the most stable isomer. In increasing order of stability the others are propanal, 2-propenol, 1-propenol, allyl alcohol, methyl vinyl ether, cyclopropanol, propylene oxide, and oxetane. Various isomerization paths connecting them are identified. All the transition states are fully characterized using intrinsic reaction coordinate calculations. The isomerization reactions may proceed through a single step or involve an intermediate species which is either a carbene or a diradical. Special attention is devoted to propylene oxide, a favorite molecule in current photochemical and stereodynamical studies because of its chiral nature. It is a rigid molecule, and chirality switching is found to be supported by its isomers. Two different chirality switching mechanisms which are assisted by propanal and allyl alcohol are presented.
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Affiliation(s)
- Munusamy Elango
- Dipartimento di Chimica, Universita di Perugia, 06123 Perugia, Italy
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26
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Che DC, Palazzetti F, Okuno Y, Aquilanti V, Kasai T. Electrostatic hexapole state-selection of the asymmetric-top molecule propylene oxide. J Phys Chem A 2010; 114:3280-6. [PMID: 20099859 DOI: 10.1021/jp909553t] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Rotational state-selection of the asymmetric-top molecule propylene oxide was carried out using an electrostatic hexapole field of 85-cm length. Molecular beam intensities were monitored by a quadrupole mass spectrometer. It was found that beam intensities of molecular beams for pure propylene oxide and those seeded in He and in Ar increased with increasing hexapole voltages. The hexapole voltage dependence of the beam intensity, which is called the focusing curve, was interpreted by computer simulation of the trajectories of molecules in the hexapolar field due to the Stark effect, as a function of rotational temperatures of molecular beams. The calculated best fit focusing curves, when compared with the experimental results, demonstrated that the rotational temperatures, associated with the distribution of states of a given rotational angular momentum J, are similar to the translational temperatures. It was found that the M = 0 states (where M is the projection of J along the direction of the electrostatic field) and negative values of the pseudoquantum number tau of propylene oxide can be selected using our experimental setup. These results suggest that the hexapole electric field is a tool even for the selection of rotational and orientation states of asymmetric-top molecules.
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Affiliation(s)
- Dock-Chil Che
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka, 560-0043, Japan.
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Arteaga O, Canillas A, Crusats J, El-Hachemi Z, Jellison GE, Llorca J, Ribó JM. Chiral biases in solids by effect of shear gradients: a speculation on the deterministic origin of biological homochirality. ORIGINS LIFE EVOL B 2010; 40:27-40. [PMID: 19924561 DOI: 10.1007/s11084-009-9184-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2009] [Accepted: 10/07/2009] [Indexed: 10/20/2022]
Abstract
We present an experimental approach to the study of the chirality of three CM2 meteorite solid samples by direct measurement of the optical activity (circular birefringence; CB). The measurements are based on transmission two modulator generalized ellipsometry in conjuction with microscope optics to map the CB of the samples. In spite of the complexity of such optical analysis, these first results indicate the presence of optically active areas in the meteorite solid matrix. In the case of the Murchison sample the statistics of the CB mapping shows a bimodal distribution with a bias to negative CB values. The composition of the active areas probably corresponds to serpentines and other poorly identified phyllosilicate phases. The results are compatible with the hypothesis that in a mineral-based scenario for the origin of life a CB sign bias in the chiral fractures originated by mechanical and flow shear gradients on clays could be later transferred to the reactions of the absorbed organic compounds.
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Affiliation(s)
- Oriol Arteaga
- Department de Física Aplicada i Optica, IN2UB, Universitat de Barcelona, Barcelona, Catalonia, Spain
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Abstract
There are few unambiguous reports describing the transfer of chirality from stirring vortices down to the level of electronic transitions. In this tutorial review the methods reported are discussed as well as the structural trends that seem to be necessary conditions in order to detect this phenomenon.
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Affiliation(s)
- Joaquim Crusats
- Department of Organic Chemistry and Institute of Cosmos Science, University of Barcelona., c. Martí i Franquès 1, 08028-Barcelona, Catalonia, Spain
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29
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Ramachandran C, Fazio DD, Sathyamurthy N, Aquilanti V. Guest species trapped inside carbon nanotubes. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2009.03.068] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Aquilanti V, Ragni M, Bitencourt ACP, Maciel GS, Prudente FV. Intramolecular Dynamics of RS−SR′ Systems (R, R′ = H, F, Cl, CH3, C2 H5): Torsional Potentials, Energy Levels, Partition Functions. J Phys Chem A 2009; 113:3804-13. [DOI: 10.1021/jp8094215] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vincenzo Aquilanti
- Dipartimento di Chimica, Università di Perugia, 06123 Perugia, Italy, and Instituto de Física, Universidade Federal da Bahia, 40210-340 Salvador, Bahia, Brazil
| | - Mirco Ragni
- Dipartimento di Chimica, Università di Perugia, 06123 Perugia, Italy, and Instituto de Física, Universidade Federal da Bahia, 40210-340 Salvador, Bahia, Brazil
| | - Ana C. P. Bitencourt
- Dipartimento di Chimica, Università di Perugia, 06123 Perugia, Italy, and Instituto de Física, Universidade Federal da Bahia, 40210-340 Salvador, Bahia, Brazil
| | - Glauciete S. Maciel
- Dipartimento di Chimica, Università di Perugia, 06123 Perugia, Italy, and Instituto de Física, Universidade Federal da Bahia, 40210-340 Salvador, Bahia, Brazil
| | - Frederico V. Prudente
- Dipartimento di Chimica, Università di Perugia, 06123 Perugia, Italy, and Instituto de Física, Universidade Federal da Bahia, 40210-340 Salvador, Bahia, Brazil
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Maciel GS, Barreto PRP, Palazzetti F, Lombardi A, Aquilanti V. A quantum chemical study of H2S2: Intramolecular torsional mode and intermolecular interactions with rare gases. J Chem Phys 2008; 129:164302. [DOI: 10.1063/1.2994732] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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32
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Bitencourt ACP, Ragni M, Maciel GS, Aquilanti V, Prudente FV. Level distributions, partition functions, and rates of chirality changing processes for the torsional mode around O–O bonds. J Chem Phys 2008; 129:154316. [DOI: 10.1063/1.2992554] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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33
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Elementary Processes in Atmospheric Chemistry: Quantum Studies of Intermolecular Dimer Formation and Intramolecular Dynamics. ADVANCES IN QUANTUM CHEMISTRY 2008. [DOI: 10.1016/s0065-3276(07)00215-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
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34
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Maciel GS, Bitencourt ACP, Ragni M, Aquilanti V. Quantum Study of Peroxidic Bonds and Torsional Levels for ROOR‘ Molecules (R, R‘ = H, F, Cl, NO, CN). J Phys Chem A 2007; 111:12604-10. [DOI: 10.1021/jp076017m] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
| | | | - Mirco Ragni
- Dipartimento di Chimica, Università di Perugia, 06123 Perugia, Italy
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Barreto PRP, Vilela AFA, Lombardi A, Maciel GS, Palazzetti F, Aquilanti V. The Hydrogen Peroxide−Rare Gas Systems: Quantum Chemical Calculations and Hyperspherical Harmonic Representation of the Potential Energy Surface for Atom−Floppy Molecule Interactions. J Phys Chem A 2007; 111:12754-62. [DOI: 10.1021/jp076268v] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Patricia R. P. Barreto
- Laboratório Associado de Plasma (LAP), Instituto Nacional de Pesquisas Espaciais (INPE)/MCT, CP 515, São José dos Campos, São Paulo, CEP 1224 7-9 70, Brazil, Instituto de Física, Universidade de Brasília, Brasília, DF, CEP 70919-970, Brazil, and Dipartimento di Chimica, Universitá di Perugia, 06100 Perugia, Italy
| | - Alessandra F. A. Vilela
- Laboratório Associado de Plasma (LAP), Instituto Nacional de Pesquisas Espaciais (INPE)/MCT, CP 515, São José dos Campos, São Paulo, CEP 1224 7-9 70, Brazil, Instituto de Física, Universidade de Brasília, Brasília, DF, CEP 70919-970, Brazil, and Dipartimento di Chimica, Universitá di Perugia, 06100 Perugia, Italy
| | - Andrea Lombardi
- Laboratório Associado de Plasma (LAP), Instituto Nacional de Pesquisas Espaciais (INPE)/MCT, CP 515, São José dos Campos, São Paulo, CEP 1224 7-9 70, Brazil, Instituto de Física, Universidade de Brasília, Brasília, DF, CEP 70919-970, Brazil, and Dipartimento di Chimica, Universitá di Perugia, 06100 Perugia, Italy
| | - Glauciete S. Maciel
- Laboratório Associado de Plasma (LAP), Instituto Nacional de Pesquisas Espaciais (INPE)/MCT, CP 515, São José dos Campos, São Paulo, CEP 1224 7-9 70, Brazil, Instituto de Física, Universidade de Brasília, Brasília, DF, CEP 70919-970, Brazil, and Dipartimento di Chimica, Universitá di Perugia, 06100 Perugia, Italy
| | - Federico Palazzetti
- Laboratório Associado de Plasma (LAP), Instituto Nacional de Pesquisas Espaciais (INPE)/MCT, CP 515, São José dos Campos, São Paulo, CEP 1224 7-9 70, Brazil, Instituto de Física, Universidade de Brasília, Brasília, DF, CEP 70919-970, Brazil, and Dipartimento di Chimica, Universitá di Perugia, 06100 Perugia, Italy
| | - Vincenzo Aquilanti
- Laboratório Associado de Plasma (LAP), Instituto Nacional de Pesquisas Espaciais (INPE)/MCT, CP 515, São José dos Campos, São Paulo, CEP 1224 7-9 70, Brazil, Instituto de Física, Universidade de Brasília, Brasília, DF, CEP 70919-970, Brazil, and Dipartimento di Chimica, Universitá di Perugia, 06100 Perugia, Italy
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36
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Maciel GS, Bitencourt ACP, Ragni M, Aquilanti V. Studies of the dynamics around the O–O bond: Orthogonal local modes of hydrogen peroxide. Chem Phys Lett 2006. [DOI: 10.1016/j.cplett.2006.10.073] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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