1
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Oh YH, Lee SY, Kong X, Oh HB, Lee S. Thermodynamic Reversal and Structural Correlation of 24-Crown-8/Protonated Tryptophan and 24-Crown 8/Protonated Serine Noncovalent Complexes in the Gas Phase vs in Solution: Quantum Chemical Analysis. ACS OMEGA 2024; 9:23793-23801. [PMID: 38854571 PMCID: PMC11154897 DOI: 10.1021/acsomega.4c01782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Revised: 05/14/2024] [Accepted: 05/17/2024] [Indexed: 06/11/2024]
Abstract
We investigate the structures of 24-crown-8/H+/l-tryptophan (CR/TrpH+) and 24-crown-8/H+/l-serine (CR/SerH+) noncovalent host-guest complex both in the gas phase and in an aqueous solution by quantum chemical methods. The Gibbs free energies of the complex in the two phases are calculated to determine the thermodynamically most favorable conformer in each phase. Our predictions indicate that both the carboxyl and the ammonium in CR/TrpH+ and the ammonium in the CR/SerH+ complexes in the lowest Gibbs free energy configurations form hydrogen bonds (H-bonds) with the CR host in the gas phase, while the conformer with the "naked" (devoid of H-bond with the CR host) -CO2H (and/or -OH) is much less favorable (Gibbs free energy higher by >3.6 kcal/mol). In the solution phase, however, a "thermodynamic reversal" occurs, making the higher Gibbs free energy gas-phase CR/TrpH+ and CR/SerH+ conformers thermodynamically more favorable under the influence of solvent molecules. Consequently, the global minimum Gibbs free energy structure in solution is structurally correlated with the thermodynamically much less gas-phase conformer. Discussions are provided concerning the possibility of elucidating host-guest-solvent interactions in solution from the gas-phase host-guest configurations in molecular detail.
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Affiliation(s)
- Young-Ho Oh
- Department
of Chemistry, Konkuk University, Seoul 05029, Republic of Korea
- Department
of Applied Chemistry, Kyung Hee University, Gyeonggi 17104, Republic of Korea
| | - So Yeon Lee
- Department
of Chemistry, Sogang University, Seoul 121-742, Republic of Korea
| | - Xianglei Kong
- State
Key Laboratory of Elemento-Organic Chemistry, Frontiers Science Center
for New Organic Matter, and Tianjin Key Laboratory of Biosensing and
Molecular Recognition, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Han Bin Oh
- Department
of Chemistry, Sogang University, Seoul 121-742, Republic of Korea
| | - Sungyul Lee
- Department
of Applied Chemistry, Kyung Hee University, Gyeonggi 17104, Republic of Korea
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2
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Martínez-Haya B, Avilés-Moreno JR, Gámez F, Martens J, Oomens J, Berden G. A Dynamic Proton Bond: MH +·H 2O ⇌ M·H 3O + Interconversion in Loosely Coordinated Environments. J Phys Chem Lett 2023; 14:1294-1300. [PMID: 36723385 PMCID: PMC9923742 DOI: 10.1021/acs.jpclett.2c03832] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 01/26/2023] [Indexed: 06/18/2023]
Abstract
The interaction of organic molecules with oxonium cations within their solvation shell may lead to the emergence of dynamic supramolecular structures with recurrently changing host-guest chemical identity. We illustrate this phenomenon in benchmark proton-bonded complexes of water with polyether macrocyles. Despite the smaller proton affinity of water versus the ether group, water in fact retains the proton in the form of H3O+, with increasing stability as the coordination number increases. Hindrance in many-fold coordination induces dynamic reversible (ether)·H3O+ ⇌ (etherH+)·H2O interconversion. We perform infrared action ion spectroscopy over a broad spectral range to expose the vibrational signatures of the loose proton bonding in these systems. Remarkably, characteristic bands for the two limiting proton bonding configurations are observed in the experimental vibrational spectra, superimposed onto diffuse bands associated with proton delocalization. These features cannot be described by static equilibrium structures but are accurately modeled within the framework of ab initio molecular dynamics.
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Affiliation(s)
- Bruno Martínez-Haya
- Department
of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013 Seville, Spain
| | | | - Francisco Gámez
- Departamento
de Química Física, Universidad Complutense, 28040 Madrid, Spain
| | - Jonathan Martens
- Institute
for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7, 6525ED Nijmegen, The Netherlands
| | - Jos Oomens
- Institute
for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7, 6525ED Nijmegen, The Netherlands
| | - Giel Berden
- Institute
for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7, 6525ED Nijmegen, The Netherlands
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3
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Zhang JQ, Liu J, Hu D, Song J, Zhu G, Ren H. Rapid and Simple Access to α-(Hetero)arylacetonitriles from Gem-Difluoroalkenes. Org Lett 2022; 24:786-790. [PMID: 34989584 DOI: 10.1021/acs.orglett.1c04336] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A scalable cyanation of gem-difluoroalkenes to (hetero)arylacetonitrile derivatives was developed. This strategy features mild reaction conditions, excellent yields, wide substrate scope, and broad functional group tolerance. Significantly, in this reaction, aqueous ammonia offers a "N" source for the "CN" reagent and entirely avoids the use of toxic cyanating reagents or metal catalysis. Hence, we provide a green and alternative method for the synthesis of arylacetonitriles.
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Affiliation(s)
- Jun-Qi Zhang
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
| | - Jiayue Liu
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
| | - Dandan Hu
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
| | - Jinyu Song
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
| | - Guorong Zhu
- Zhejiang Tianyu Pharmaceutical Co., Lddd., Jiangkou Development Zone, Huangyan 318020, Zhejiang, P. R. China
| | - Hongjun Ren
- Advanced Research Institute and Department of Chemistry, Taizhou University, Jiaojiang 318000, Zhejiang, P. R. China
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4
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Goda R, Kanazawa S, Machida S, Muramatsu S, Inokuchi Y. Conformation of Benzo-12-Crown-4 Complexes with Ammonium Ions Investigated by Cold Gas-Phase Spectroscopy. J Phys Chem A 2021; 125:10410-10418. [PMID: 34818015 DOI: 10.1021/acs.jpca.1c09091] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this study, we examined the conformation and intermolecular interactions of benzo-12-crown-4 (B12C4) complexes with NH4+, CH3NH3+ (MeNH3+), CH3CH2NH3+ (EtNH3+), and CH3CH2CH2NH3+ (PrNH3+) using cold gas-phase spectroscopy. All of the B12C4 complexes showed sharp vibronic features in the UV photodissociation spectra, and the position of the 0-0 band was close to that of the B12C4 complex with an isotropic K+ guest. This result suggests that the conformation of B12C4 is maintained despite oriented interactions with ammonium guests via anisotropic N-H···O interactions. Further, we measured the IR-UV double-resonance spectra of these complexes in the NH stretching region. In the IR-UV spectra of the EtNH3+ and PrNH3+ complexes, two distinct IR fingerprints were observed depending on the UV probe wavelength selected, indicating the existence of another (second) conformer for these complexes. Quantum chemical calculations clarified that the second conformer of the EtNH3+ and PrNH3+ complexes was partially stabilized by the C-H···π hydrogen bond. The conformation of B12C4 complexes with ammonium ions is strongly affected by the interaction between the alkyl chain of the ion guest and the benzene ring of the B12C4 host, although the main intermolecular interaction occurs between the NH3+ group and crown cavity through the N-H···O hydrogen bonds.
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Affiliation(s)
- Ryosuke Goda
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | - Saya Kanazawa
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | - Shiori Machida
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | - Satoru Muramatsu
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
| | - Yoshiya Inokuchi
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
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5
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Gámez F, Avilés-Moreno JR, Berden G, Oomens J, Martínez-Haya B. Proton in the ring: spectroscopy and dynamics of proton bonding in macrocycle cavities. Phys Chem Chem Phys 2021; 23:21532-21543. [PMID: 34549205 DOI: 10.1039/d1cp03033g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The proton bond is a paradigmatic quantum molecular interaction and a major driving force of supramolecular chemistry. The ring cavities of crown ethers provide an intriguing environment, promoting competitive proton sharing with multiple coordination anchors. This study shows that protons confined in crown ether cavities form dynamic bonds that migrate to varying pairs of coordinating atoms when allowed by the flexibility of the macrocycle backbone. Prototypic native crown ethers (12-crown-4, 15-crown-5 and 18-crown-6) and aza-crown ethers (cyclen, 1-aza-18-crown-6 and hexacyclen) are investigated. For each system, Infrared action spectroscopy experiments and ab initio Molecular Dynamics computations are employed to elucidate the structural effects associated with proton diffusion and its entanglement with the conformational and vibrational dynamics of the protonated host.
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Affiliation(s)
- Francisco Gámez
- Department of Physical Chemistry, Universidad de Granada, Avenida de la Fuente Nueva s/n, 18071, Granada, Spain
| | - Juan R Avilés-Moreno
- Department of Applied Physical Chemistry, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Giel Berden
- FELIX Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7, 6525ED Nijmegen, The Netherlands
| | - Jos Oomens
- FELIX Laboratory, Institute for Molecules and Materials, Radboud University, Toernooiveld 7, 6525ED Nijmegen, The Netherlands
| | - Bruno Martínez-Haya
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, Ctra. de Utrera, km. 1, 41013 Seville, Spain.
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6
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Bessam S, Reguig FH, Krallafa AM, Martínez-Haya B. Dynamics of coordination of H 3O + and NH 4+ in crown ether cavities. Phys Chem Chem Phys 2021; 23:8633-8640. [PMID: 33876024 DOI: 10.1039/d1cp00575h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Crown ethers stand out for their ability to form inclusion complexes with metal cations and positively charged molecular moieties. Hydronium and ammonium interact strongly with crown ethers and potentially modulate their ionophoric activity in protic solvents and physiological environments commonly involved in (bio)technological applications. In this work, Born-Oppenheimer molecular dynamics (BOMD) computations are employed to gain insights into the coordination arrangements of H3O+ and NH4+ in the complexes with the native crown ethers 15-crown-5 (15c5) and 18-crown-6 (18c6). Both cations display dynamic changes in coordination inside the cavities of the crown ethers. On the one hand, hydronium explores different coordination arrangements, through rotation around its C3 axis in the 15c5 complex, and through breathing motions, involving rapid inversions of the O atom along the C3 axis in the 18c6 complex. On the other hand, ammonium undergoes a facile rotation in three dimensional space, leading to frequent changes in the NH bonds involved in the coordination with the crown ether. The reduced host-guest symmetry matching of the 15c5 macrocycle enhances the reorientation dynamics and, in the case of H3O+, it promotes short H-bonding distances yielding events of proton transfer to the crown ether. The infrared vibrational spectra predicted by the BOMD computations within this dynamic framework reproduce with remarkable accuracy the action spectra of the isolated complexes obtained in previous infrared laser spectroscopy experiments. The experimentally observed band positions and broadening can then be rationalized in terms of orientational diffusion of the cations, changes in the coordinating H-bonding pairs sustaining the complex and eventual proton bridge formation.
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Affiliation(s)
- S Bessam
- LCPM Laboratory, Faculty of Sciences, Chemistry Department, University of Oran 1, Ahmed BenBella, Oran, Algeria
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7
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Zhou D, Hao H, Ma Y, Zhong H, Dai Y, Cai K, Mukherjee S, Liu J, Bian H. Specific Host-Guest Interactions in the Crown Ether Complexes with K + and NH 4+ Revealed from the Vibrational Relaxation Dynamics of the Counteranion. J Phys Chem B 2020; 124:9154-9162. [PMID: 32965118 DOI: 10.1021/acs.jpcb.0c07032] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The specific host-guest interactions in the corresponding complexes of K+ and NH4+ with typical crown ethers were investigated by using FTIR and ultrafast IR spectroscopies. The counteranions, i.e., SCN-, were employed as a local vibrational probe to report the structural dynamics of the complexation. It was found that the vibrational relaxation dynamics of the SCN- was strongly affected by the cations confined in the cavities of the crown ethers. The time constant of the vibrational population decay of SCN- in the complex of NH4+ with the 18-crown-6 was determined to be 6 ± 2 ps, which is ∼30 times faster than that in the complex of K+ with the crown ethers. Control experiments showed that the vibrational population decay of SCN- depended on the size of the cavities of the crown ethers. A theoretical calculation further indicated that the nitrogen atom of SCN- showed preferential coordination to the K+ ions hosted by the crown ethers, while the NH4+ can form hydrogen bonds with the oxygen atoms in the studied crown ethers. The geometric constraints formed in the complex of crown ethers can cause a specific interaction between the NH4+ and SCN-, which can facilitate the intermolecular vibrational energy redistribution of the SCN-.
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Affiliation(s)
- Dexia Zhou
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Hongxing Hao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Yinhua Ma
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Hongmei Zhong
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, Fujian Normal University, Fuzhou, Fujian 350007, China
| | - Ya'nan Dai
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, Fujian Normal University, Fuzhou, Fujian 350007, China
| | - Kaicong Cai
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, Fujian Normal University, Fuzhou, Fujian 350007, China
| | - Somnath Mukherjee
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Jing Liu
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Hongtao Bian
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
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8
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Mishra M, Jomon KJ, Krishnan VRS, Nizam A. [18-C-6H 3O +]: an in-situ generated macrocyclic complex and an efficient, novel catalyst for synthesis of pyrano[2,3-c]pyrazole derivatives. Sci Rep 2020; 10:14342. [PMID: 32868818 PMCID: PMC7459110 DOI: 10.1038/s41598-020-70665-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 07/14/2020] [Indexed: 01/19/2023] Open
Abstract
Synthesis of small aromatic heterocycles is of greater importance in the organic chemistry due to their vibrant applications in pharmaceuticals, agrochemicals and veterinary products. Pyranopyrazoles are one such class of heterocycles associated with numerous applications. Hence herein we report a multicomponent crown ether catalyzed, ultrasound irradiated methodology to make different functionalized pyranopyrazoles in a single step. This technique involves the in-situ generation of [18-C-6H3O+][OH−] complex, which in turn activates the aromatic aldehyde and aids in the facile nucleophilic addition.
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Affiliation(s)
- Manisha Mishra
- Department of Chemistry, CHRIST (Deemed to be University), Hosur Road, Bangalore, 560029, India
| | - K J Jomon
- Department of Chemistry, CHRIST (Deemed to be University), Hosur Road, Bangalore, 560029, India
| | - V R Sriram Krishnan
- Department of Chemistry, CHRIST (Deemed to be University), Hosur Road, Bangalore, 560029, India
| | - Aatika Nizam
- Department of Chemistry, CHRIST (Deemed to be University), Hosur Road, Bangalore, 560029, India.
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9
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Kubo M, Kida M, Muramatsu S, Inokuchi Y. Induced Fit of Crown Cavity to Ammonium Ion Guests and Photoinduced Intracavity Reactions: Cold Gas-Phase Spectroscopy of Dibenzo-18-Crown-6 Complexes with NH 4+, CH 3NH 3+, and CH 3CH 2NH 3. J Phys Chem A 2020; 124:3228-3241. [PMID: 32255649 DOI: 10.1021/acs.jpca.0c02341] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ultraviolet photodissociation (UVPD) spectra of dibenzo-18-crown-6 (DB18C6) complexes with NH4+, CH3NH3+ (MeNH3+), and CH3CH2NH3+ (EtNH3+) [NH4+(DB18C6), MeNH3+(DB18C6), and EtNH3+(DB18C6), respectively] were observed under cold gas-phase conditions. We also measured the infrared (IR)-UV double-resonance spectra of these complexes in the NH stretching region to examine the encapsulation structure. The UVPD and IR-UV spectra were analyzed using quantum chemical calculations. All the ammonium complexes show sharp 0-0 bands at positions close to that of the K+(DB18C6) complex; the conformation of the DB18C6 component in the ammonium complexes is similar to that in K+(DB18C6). In addition, the ammonium complexes each have another type of isomer that the K+(DB18C6) complex does not show in the gas phase. In these isomers, the conformation of the DB18C6 cavity changes, and the strength of the NH···O hydrogen bond increases. During the UVPD, the NH4+(DB18C6) complex provides various photofragment species, such as the C8H9O2+ ion, resulting from cleavage of the DB18C6 component, whereas the dominant fragment ion for the MeNH3+(DB18C6) and EtNH3+(DB18C6) complexes is the ammonium ion itself. The UVPD investigation of deuterated systems suggests that after UV excitation of the NH4+(DB18C6) complex, the dissociation process is initiated by proton transfer from NH4+ to DB18C6, followed by the migration of hydrogen atoms in the crown cavity and the cleavage of the ether ring.
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Affiliation(s)
- Mayuko Kubo
- Department of Chemistry, Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Motoki Kida
- Department of Chemistry, Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Satoru Muramatsu
- Department of Chemistry, Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan
| | - Yoshiya Inokuchi
- Department of Chemistry, Graduate School of Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526, Japan
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10
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Multiple strong hydrogen bonded supramolecular cocrystals of 18-crown-6 with 5-nitroisophthalic acid: Solvent effect and optical nonlinearities. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127158] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Jin L, Li B, Cui Z, Shang J, Wang Y, Shao C, Pan T, Ge Y, Qi Z. Selenium Substitution-Induced Hydration Changes of Crown Ethers As Tools for Probing Water Interactions with Supramolecular Macrocycles in Aqueous Solutions. J Phys Chem B 2019; 123:9692-9698. [DOI: 10.1021/acs.jpcb.9b09618] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Lin Jin
- Sino-German Joint Research Lab for Space Biomaterials and Translational Technology, Synergetic Innovation Center of Flexible Electronics and Healthcare Engineering, School of Life Sciences, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, P. R. China
| | - Bo Li
- Sino-German Joint Research Lab for Space Biomaterials and Translational Technology, Synergetic Innovation Center of Flexible Electronics and Healthcare Engineering, School of Life Sciences, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, P. R. China
| | - Zhiliyu Cui
- Sino-German Joint Research Lab for Space Biomaterials and Translational Technology, Synergetic Innovation Center of Flexible Electronics and Healthcare Engineering, School of Life Sciences, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, P. R. China
| | - Jie Shang
- Sino-German Joint Research Lab for Space Biomaterials and Translational Technology, Synergetic Innovation Center of Flexible Electronics and Healthcare Engineering, School of Life Sciences, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, P. R. China
| | - Yangxin Wang
- Sino-German Joint Research Lab for Space Biomaterials and Translational Technology, Synergetic Innovation Center of Flexible Electronics and Healthcare Engineering, School of Life Sciences, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, P. R. China
| | - Chenguang Shao
- Sino-German Joint Research Lab for Space Biomaterials and Translational Technology, Synergetic Innovation Center of Flexible Electronics and Healthcare Engineering, School of Life Sciences, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, P. R. China
| | - Tiezheng Pan
- Sino-German Joint Research Lab for Space Biomaterials and Translational Technology, Synergetic Innovation Center of Flexible Electronics and Healthcare Engineering, School of Life Sciences, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, P. R. China
| | - Yan Ge
- Sino-German Joint Research Lab for Space Biomaterials and Translational Technology, Synergetic Innovation Center of Flexible Electronics and Healthcare Engineering, School of Life Sciences, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, P. R. China
| | - Zhenhui Qi
- Sino-German Joint Research Lab for Space Biomaterials and Translational Technology, Synergetic Innovation Center of Flexible Electronics and Healthcare Engineering, School of Life Sciences, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, P. R. China
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12
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McNary CP, Nei YW, Maitre P, Rodgers MT, Armentrout PB. Infrared multiple photon dissociation action spectroscopy of protonated glycine, histidine, lysine, and arginine complexed with 18-crown-6 ether. Phys Chem Chem Phys 2019; 21:12625-12639. [PMID: 31155616 DOI: 10.1039/c9cp02265a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Complexes of 18-crown-6 ether (18C6) with four protonated amino acids (AAs) are examined using infrared multiple photon dissociation (IRMPD) action spectroscopy utilizing light generated by the infrared free electron laser at the Centre Laser Infrarouge d'Orsay (CLIO). The AAs examined in this work include glycine (Gly) and the three basic AAs: histidine (His), lysine (Lys), and arginine (Arg). To identify the (AA)H+(18C6) conformations present in the experimental studies, the measured IRMPD spectra are compared to spectra calculated at the B3LYP/6-311+G(d,p) level of theory. Relative energies of various conformers and isomers are provided by single point energy calculations carried out at the B3LYP, B3P86, M06, and MP2(full) levels using the 6-311+G(2p,2d) basis set. The comparisons between the IRMPD and theoretical IR spectra indicate that 18C6 binds to Gly and His via the protonated backbone amino group, whereas protonated Lys prefers binding via the protonated side-chain amino group. Results for Arg are less definitive with strong evidence for binding to the protonated guanidino side chain (the calculated ground conformer at most levels of theory), but contributions from backbone binding to a zwitterionic structure are likely.
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Affiliation(s)
- Christopher P McNary
- Department of Chemistry, University of Utah, 315 S. 1400 E. Room 2020, Salt Lake City, Utah 84112, USA.
| | - Y-W Nei
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA.
| | - Philippe Maitre
- Université Paris Sud, Laboratoire de Chimie Physique, UMR8000 CNRS, Faculté des Sciences, Bâtiment 350, 91405 Orsay Cedex, France
| | - M T Rodgers
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA.
| | - P B Armentrout
- Department of Chemistry, University of Utah, 315 S. 1400 E. Room 2020, Salt Lake City, Utah 84112, USA.
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13
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López JC, Pérez C, Blanco S, Shubert VA, Temelso B, Shields GC, Schnell M. Water induces the same crown shapes as Li+ or Na+ in 15-crown-5 ether: a broadband rotational study. Phys Chem Chem Phys 2019; 21:2875-2881. [DOI: 10.1039/c8cp05552a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Complexation with water reduces the structural landscape of 15-crown-5 ether to the two forms observed for Li+ or Na+ complexes.
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Affiliation(s)
- Juan C. López
- Deutsches Elektronen-Synchrotron (DESY)
- Hamburg
- Germany
- Departamento de Química Física y Química Inorgánica
- Facultad de Ciencias
| | - Cristóbal Pérez
- Deutsches Elektronen-Synchrotron (DESY)
- Hamburg
- Germany
- Facultad de Ciencia y Tecnología
- Universidad del País Vasco (UPV-EHU)
| | - Susana Blanco
- Departamento de Química Física y Química Inorgánica
- Facultad de Ciencias
- Universidad de Valladolid
- Valladolid
- Spain
| | | | - Berhane Temelso
- Provost's Office and Department of Chemistry
- Furman University
- Greenville
- USA
| | - George C. Shields
- Provost's Office and Department of Chemistry
- Furman University
- Greenville
- USA
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14
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Martínez-Haya B, Avilés-Moreno JR, Gámez F, Berden G, Oomens J. Preferential host-guest coordination of nonactin with ammonium and hydroxylammonium. J Chem Phys 2018; 149:225101. [PMID: 30553267 DOI: 10.1063/1.5049956] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
The biological activity of the macrocycle nonactin is intimately related to its ionophore properties and ability to act as a selective cation carrier. The competitive binding of small protonated amines constitutes a particularly key issue in the biochemistry of nonactin, which finds application in sensing and extraction technologies. In this study, isolated complexes of nonactin with ammonium and hydroxylammonium are investigated with infrared action spectroscopy and quantum chemical computations. The focus of the investigation is on the coordination achieved by the protonated guest with the oxygen atoms of either the oxolane groups or the carboxyl groups in the ester linkages of the macrocyle host and their relative contributions to the stability of the complexes. The experimental and computational data converge to a preferred coordination arrangement associated with a tight binding of the N-H δ+ bonds with the oxolane groups. In the N H 4 + complex, this results in a compact complex of S 4 symmetry. In contrast, symmetry is disrupted in the NH3OH+ complex, as it incorporates a bifurcated coordination of the -OH bond with a carbonyl group and an oxolane group of the host, involving also a more stretched arrangement of the nonactin backbone. These gas-phase conformations are in agreement with the structures postulated for these complexes in condensed phases, from previous Raman and crystallographic experiments.
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Affiliation(s)
- Bruno Martínez-Haya
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013 Seville, Spain
| | - Juan Ramón Avilés-Moreno
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013 Seville, Spain
| | - Francisco Gámez
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013 Seville, Spain
| | - Giel Berden
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525ED Nijmegen, The Netherlands
| | - Jos Oomens
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525ED Nijmegen, The Netherlands
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15
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Avilés-Moreno JR, Berden G, Oomens J, Martínez-Haya B. Complexes of Crown Ether Macrocycles with Methyl Guanidinium: Insights into the Capture of Charge in Peptides. Chemphyschem 2018; 19:2169-2175. [PMID: 29944200 DOI: 10.1002/cphc.201800596] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Indexed: 11/08/2022]
Abstract
Crown ethers are well known as modulating agents of protein function and interactions. The action of crown ethers is driven by an alteration of the charged moieties of proteins through the capping of cationic amino acid side chains. This study evaluates the conformational features involved in the binding of crown ethers to the side chain of arginine. For this purpose, isolated complexes of methyl guanidinium with 12-crown-4 and 18-crown-6 are characterized with infrared action vibrational spectroscopy and quantum chemical computations. The conformational landscapes of the two complexes comprise an extensive ensemble of conformations close in energy. In the 12-crown-4 complex, the crown ether has the plane of its backbone approximately perpendicular to that of the guanidinium moiety and coordinates to two or three of its NHδ+ bonds. In the 18-crown-6 complex, the crown ether backbone is partially folded and tilted with respect to guanidinium and fixes its position in order to facilitate up to a four-fold coordination in the complex. The access of the complexes to multiple conformations leads to broad band structures in the N-H stretching region of their vibrational spectra.
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Affiliation(s)
- Juan Ramón Avilés-Moreno
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013, Seville, Spain
| | - Giel Berden
- Radboud University, Institute for Molecules and Materials FELIX Laboratory, Toernooiveld 7c, 6525ED, Nijmegen, The Netherlands
| | - Jos Oomens
- Radboud University, Institute for Molecules and Materials FELIX Laboratory, Toernooiveld 7c, 6525ED, Nijmegen, The Netherlands
| | - Bruno Martínez-Haya
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013, Seville, Spain
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16
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Chen Y, Jami-Alahmadi Y, Unikela KS, Bodwell GJ, Fridgen TD. Endo or Exo? Structures of Gas-Phase Alkali Metal Cation/Aromatic Half-Belt Complexes. Chemphyschem 2018; 19:2194-2199. [PMID: 29741278 DOI: 10.1002/cphc.201800371] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Indexed: 11/11/2022]
Abstract
1,1,9,9-Tetramethyl[9](2,11)teropyrenophane (TM9TP), a belt-shaped molecule, has a sizable cavity that molecules or ions could occupy. In this study, the question of whether TM9TP forms gas-phase ion-molecule complexes with metal cations (K+ , Rb+ , Cs+ ) situated inside or outside the TM9TP cavity was addressed using both experimental and computational methods. Complexes were trapped in a Fourier transform ion cyclotron resonance mass spectrometer and their structures were explored by some novel physical chemistry/mass spectrometry methods. Blackbody infrared radiative dissociation kinetics reveal two populations of ions, a fast dissociating fraction and a persistent fraction. Infrared multiphoton dissociation spectra (vibrational spectra) provide very strong evidence that the most abundant population is a complex where the metal cation is inside the TM9TP cavity, endo-TM9TP. Red-shifted C-H stretching bands present in the gas-phase vibrational spectra of these ionic complexes show that there is an interaction between the metal cation and bridge C-H bonds due to the cation sitting inside the cavity of TM9TP. B3LYP/6-31+G(d,p) calculations showed the endo complexes to be the lowest in energy; about 60 kJ mol-1 more thermodynamically stable and more than 120 kJ mol-1 kinetically more stable than the exo complex.
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Affiliation(s)
- Yanyang Chen
- Department of Chemistry, Memorial University of Newfoundland, Memorial University, St. John's, NL, A1B 3X7, Canada
| | - Yasaman Jami-Alahmadi
- Department of Chemistry, Memorial University of Newfoundland, Memorial University, St. John's, NL, A1B 3X7, Canada
| | - Kiran Sagar Unikela
- Department of Chemistry, Memorial University of Newfoundland, Memorial University, St. John's, NL, A1B 3X7, Canada
| | - Graham J Bodwell
- Department of Chemistry, Memorial University of Newfoundland, Memorial University, St. John's, NL, A1B 3X7, Canada
| | - Travis D Fridgen
- Department of Chemistry, Memorial University of Newfoundland, Memorial University, St. John's, NL, A1B 3X7, Canada
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17
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Avilés-Moreno JR, Berden G, Oomens J, Martínez-Haya B. Intra-cavity proton bonding and anharmonicity in the anionophore cyclen. Phys Chem Chem Phys 2018; 20:8968-8975. [PMID: 29557457 DOI: 10.1039/c8cp00660a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Proton bonding drives the supramolecular chemistry of a broad range of materials with polar moieties. Proton delocalization and electronic charge redistribution have a profound impact on the structure of proton-bound molecular frameworks, and pose fundamental challenges to quantum chemical modelling. This study provides insights into the structural and spectral signatures of the intramolecular proton bond formed in a benchmark polyazamacrocycle anionophore (cyclen, 1,4,7,10-tetraazacyclododecane). Infrared action spectroscopy is employed to characterize the macrocycle, isolated in protonated form. In its most stable configuration, protonated cyclen adopts an open arrangement of Cs symmetry with a particularly strong NHδ+N bond across the cavity. The quantum chemical analysis of the infrared spectrum reveals intrinsic difficulties for the accurate description of the vibrational modes of the system. The reconciliation of the computational predictions with experiment demands a careful anharmonic treatment of the proton motion, which exposes the limitations of current methods. Best results are obtained with the incorporation of anharmonicity only to the fundamental modes directly related to motions of the proton. However, the full anharmonic treatment of the system fails to describe correctly the vibrations related to the macrocycle backbone. The results should serve as motivation for new developments in the modelling of proton bonded systems.
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Affiliation(s)
- Juan Ramón Avilés-Moreno
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, E-41013 Seville, Spain.
| | - Giel Berden
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525ED Nijmegen, The Netherlands
| | - Jos Oomens
- Radboud University, Institute for Molecules and Materials, FELIX Laboratory, Toernooiveld 7c, 6525ED Nijmegen, The Netherlands
| | - Bruno Martínez-Haya
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, E-41013 Seville, Spain.
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18
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Metwally H, Konermann L. Crown Ether Effects on the Location of Charge Carriers in Electrospray Droplets: Implications for the Mechanism of Protein Charging and Supercharging. Anal Chem 2018; 90:4126-4134. [DOI: 10.1021/acs.analchem.8b00099] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Haidy Metwally
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Lars Konermann
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada
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19
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Jašíková L, Roithová J. Infrared Multiphoton Dissociation Spectroscopy with Free-Electron Lasers: On the Road from Small Molecules to Biomolecules. Chemistry 2018; 24:3374-3390. [PMID: 29314303 DOI: 10.1002/chem.201705692] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Indexed: 01/07/2023]
Abstract
Infrared multiphoton dissociation (IRMPD) spectroscopy is commonly used to determine the structure of isolated, mass-selected ions in the gas phase. This method has been widely used since it became available at free-electron laser (FEL) user facilities. Thus, in this Minireview, we examine the use of IRMPD/FEL spectroscopy for investigating ions derived from small molecules, metal complexes, organometallic compounds and biorelevant ions. Furthermore, we outline new applications of IRMPD spectroscopy to study biomolecules.
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Affiliation(s)
- Lucie Jašíková
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 2030, Prague 2, 128 43, Czech Republic
| | - Jana Roithová
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 2030, Prague 2, 128 43, Czech Republic
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20
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Saha S, Roy MN. Probing supramolecular complexation of cetylpyridinium chloride with crown ethers. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.07.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Filippi A, Fraschetti C, Guarcini L, Zazza C, Ema T, Speranza M. Spectroscopic Discrimination of Diastereomeric Complexes Involving an Axially Chiral Receptor. Chemphyschem 2017; 18:2475-2481. [DOI: 10.1002/cphc.201700732] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Indexed: 01/20/2023]
Affiliation(s)
- Antonello Filippi
- Università di Roma “La Sapienza”; Dipartimento di Chimica e Tecnologie del Farmaco; P.le A. Moro, 5 Roma 00185 Italy
| | - Caterina Fraschetti
- Università di Roma “La Sapienza”; Dipartimento di Chimica e Tecnologie del Farmaco; P.le A. Moro, 5 Roma 00185 Italy
| | - Laura Guarcini
- Università di Roma “La Sapienza”; Dipartimento di Chimica e Tecnologie del Farmaco; P.le A. Moro, 5 Roma 00185 Italy
| | - Costantino Zazza
- Università di Roma “La Sapienza”; Dipartimento di Chimica e Tecnologie del Farmaco; P.le A. Moro, 5 Roma 00185 Italy
| | - Tadashi Ema
- Graduate School of Natural Sciences and Technology; Okayama University; Tsushima Okayama 700-8530 Japan
| | - Maurizio Speranza
- Università di Roma “La Sapienza”; Dipartimento di Chimica e Tecnologie del Farmaco; P.le A. Moro, 5 Roma 00185 Italy
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22
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Hidden role of intermolecular proton transfer in the anomalously diffuse vibrational spectrum of a trapped hydronium ion. Proc Natl Acad Sci U S A 2017; 114:E4706-E4713. [PMID: 28566495 DOI: 10.1073/pnas.1705089114] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
We report the vibrational spectra of the hydronium and methyl-ammonium ions captured in the C3v binding pocket of the 18-crown-6 ether ionophore. Although the NH stretching bands of the CH3NH3+ ion are consistent with harmonic expectations, the OH stretching bands of H3O+ are surprisingly broad, appearing as a diffuse background absorption with little intensity modulation over 800 cm-1 with an onset ∼400 cm-1 below the harmonic prediction. This structure persists even when only a single OH group is present in the HD2O+ isotopologue, while the OD stretching region displays a regular progression involving a soft mode at about 85 cm-1 These results are rationalized in a vibrationally adiabatic (VA) model in which the motion of the H3O+ ion in the crown pocket is strongly coupled with its OH stretches. In this picture, H3O+ resides in the center of the crown in the vibrational zero-point level, while the minima in the VA potentials associated with the excited OH vibrational states are shifted away from the symmetrical configuration displayed by the ground state. Infrared excitation between these strongly H/D isotope-dependent VA potentials then accounts for most of the broadening in the OH stretching manifold. Specifically, low-frequency motions involving concerted motions of the crown scaffold and the H3O+ ion are driven by a Franck-Condon-like mechanism. In essence, vibrational spectroscopy of these systems can be viewed from the perspective of photochemical interconversion between transient, isomeric forms of the complexes corresponding to the initial stage of intermolecular proton transfer.
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23
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Martínez-Haya B, Avilés-Moreno JR, Hamad S, Elguero J. On the ionophoric selectivity of nonactin and related macrotetrolide derivatives. Phys Chem Chem Phys 2017; 19:1288-1297. [DOI: 10.1039/c6cp05324f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Microhydration determines the cation affinities of nactin macrocyles in aqueous–organic extraction processes.
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Affiliation(s)
- Bruno Martínez-Haya
- Department of Physical
- Chemical and Natural Systems
- Universidad Pablo de Olavide
- Spain
| | | | - Said Hamad
- Department of Physical
- Chemical and Natural Systems
- Universidad Pablo de Olavide
- Spain
| | - José Elguero
- Instituto de Química Médica
- CSIC
- E-28006 Madrid
- Spain
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24
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Pérez C, López JC, Blanco S, Schnell M. Water-Induced Structural Changes in Crown Ethers from Broadband Rotational Spectroscopy. J Phys Chem Lett 2016; 7:4053-4058. [PMID: 27676358 DOI: 10.1021/acs.jpclett.6b01939] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The complexes of 12-crown-4 ether (12C4) with water, generated in a supersonic jet, have been studied using broadband Fourier transform microwave spectroscopy. Three 1:1 and one 1:2 clusters have been observed and their structures unambiguously identified through the observation of isotopologue spectra. The structures of the clusters are based on networks of O-H···O and C-H···O hydrogen bonds. The most abundant 1:1 cluster is formed from the most stable S4 symmetry conformer of 12C4, even though it is not the energetically favored water complex. Interestingly, the structures of the most stable water cluster and the other remaining observed 1:1 and 1:2 complexes are formed from the second or the fifth most abundant conformers of 12C4. This shows the existence of a mechanism that changes the conformation of 12C4 so that the host-guest interactions can be maximized, even for a "soft" ligand like water.
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Affiliation(s)
- Cristóbal Pérez
- Max Planck Institute for the Structure and Dynamics of Matter , 22761 Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging at the Universität Hamburg , 22761 Hamburg, Germany
| | - Juan C López
- Max Planck Institute for the Structure and Dynamics of Matter , 22761 Hamburg, Germany
- Departamento de Quimica Fisica y Quimica Inorganica, Facultad de Ciencias, Universidad de Valladolid , Valladolid 47011, Spain
| | - Susana Blanco
- Departamento de Quimica Fisica y Quimica Inorganica, Facultad de Ciencias, Universidad de Valladolid , Valladolid 47011, Spain
| | - Melanie Schnell
- Max Planck Institute for the Structure and Dynamics of Matter , 22761 Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging at the Universität Hamburg , 22761 Hamburg, Germany
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25
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Chakarawet K, Knopf I, Nava M, Jiang Y, Stauber JM, Cummins CC. Crystalline Metaphosphate Acid Salts: Synthesis in Organic Media, Structures, Hydrogen-Bonding Capability, and Implication of Superacidity. Inorg Chem 2016; 55:6178-85. [DOI: 10.1021/acs.inorgchem.6b00749] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Khetpakorn Chakarawet
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Ioana Knopf
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Matthew Nava
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Yanfeng Jiang
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Julia M. Stauber
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Christopher C. Cummins
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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26
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Taleb Bendiab W, Hamza Reguig F, Hamad S, Martínez-Haya B, Krallafa AM. Ab initio molecular dynamics investigation of proton delocalization in crown ether complexes with H3O+ and NH4 +. J INCL PHENOM MACRO 2016. [DOI: 10.1007/s10847-016-0607-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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27
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Cheng M, Liu X, Luo Q, Duan X, Pei C. Cocrystals of ammonium perchlorate with a series of crown ethers: preparation, structures, and properties. CrystEngComm 2016. [DOI: 10.1039/c6ce01455k] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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28
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Tas S, Zoetebier B, Hempenius MA, Vancso GJ, Nijmeijer K. Monovalent cation selective crown ether containing poly(arylene ether ketone)/SPEEK blend membranes. RSC Adv 2016. [DOI: 10.1039/c6ra11566g] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Crown ether units incorporated in the poly(arylene ether ketone) (PAEK) main chain enhance the miscibility of PAEK with sulfonated poly(ether ether ketone) (SPEEK). The resulting blend membranes enable the separation of monovalent ions.
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Affiliation(s)
- Sinem Tas
- Membrane Science & Technology
- Mesa+ Institute for Nanotechnology
- University of Twente
- 7500 AE Enschede
- The Netherlands
| | - Bram Zoetebier
- Department of Material Science and Technology of Polymers
- Mesa+ Institute for Nanotechnology
- University of Twente
- 7500 AE Enschede
- The Netherlands
| | - Mark A. Hempenius
- Department of Material Science and Technology of Polymers
- Mesa+ Institute for Nanotechnology
- University of Twente
- 7500 AE Enschede
- The Netherlands
| | - G. Julius Vancso
- Department of Material Science and Technology of Polymers
- Mesa+ Institute for Nanotechnology
- University of Twente
- 7500 AE Enschede
- The Netherlands
| | - Kitty Nijmeijer
- Membrane Science & Technology
- Mesa+ Institute for Nanotechnology
- University of Twente
- 7500 AE Enschede
- The Netherlands
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29
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Hu SW, Chen S. A Multipurpose Lignin-based Adsorbent for Metallic Ions, Nanoparticles and Various Organophosphate Pesticides in Hexane. J CHIN CHEM SOC-TAIP 2015. [DOI: 10.1002/jccs.201400299] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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30
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Pyta K, Przybylski P, Bartl F. Regioselective long-range proton transfer in new rifamycin antibiotics: a process in which crown ethers act as stronger Brønsted bases than amines. Chemphyschem 2015; 16:938-42. [PMID: 25639734 DOI: 10.1002/cphc.201402892] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Indexed: 01/10/2023]
Abstract
Water-mediated proton transfer in six new derivatives of 3-formylrifamycin SV that contain crown, aza-crown, and benzo-crown ether rings were investigated by FTIR and NMR spectroscopy. (1)H-(1)H COSY couplings provide evidence for the formation of zwitterionic structures of the aza-crown and crown ether derivatives of rifamycin, in which a proton from one of the phenolic groups is transferred to tertiary and secondary nitrogen atoms. The increased intensity of the continuous absorption in the mid-infrared region together with the NMR data indicate proton transfer from the phenol group of the rifamycin core to the cavity of the benzo-crown ether ring. This proton transfer is achieved by formation of hydronium (H3O(+)) or Zundel ions (H5O2(+)), which form intermolecular hydrogen bonds with the oxygen atoms of the crown ether. DFT calculations are in agreement with the spectroscopic data and allow visualization of the structures of all new rifamycin derivatives, characterized by different intramolecular protonation sites.
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Affiliation(s)
- Krystian Pyta
- Faculty of Chemistry, Adam Mickiewicz University, Umultowska 89b, 61-614 Poznan (Poland)
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31
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Bhaskar Reddy M, Shailaja M, Manjula A, Premkumar JR, Sastry GN, Sirisha K, Sarma AVS. Design and synthesis of Tröger's base ditopic receptors: host-guest interactions, a combined theoretical and experimental study. Org Biomol Chem 2015; 13:1141-9. [PMID: 25425264 DOI: 10.1039/c4ob02266a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two flexible Tröger's base ditopic receptors C4TB and C5TB incorporating monoaza crown ether were designed and synthesized for bisammonium ion complexation. A comprehensive study of host-guest interactions was established by (1)H NMR spectroscopy and DFT calculations. Bisammonium chloride (A1) with a shorter alkyl chain spacer showed the highest affinity for the receptors. M06-2X/cc-pVTZ calculations including the solvent effects on host-guest complexes were employed to explain and rationalize the experimental trends. The short N-H···O or N-H···N hydrogen-bond distances observed in the range of 1.71-1.98 Å indicate the existence of a strong charge assisted hydrogen bonding between the host and the guest. The unusual behaviour (higher binding constant) of A5 in (1)H NMR titration is traced to the conformational folding of the guest.
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Affiliation(s)
- Manda Bhaskar Reddy
- Crop Protection Chemicals Division, CSIR-Indian Institute of Chemical Technology, Hyderabad, India.
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32
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Rais J, Tachimori S, Yoo E, Alexová J, Bubeníková M. Extraction of Radioactive Cs and Sr from Nitric Acid Solutions with 25,27-Bis(1-octyloxy)calix[4]-26,28-Crown-6 and Dicyclohexyl-18-Crown-6: Effect of Nature of the Organic Solvent. SEP SCI TECHNOL 2015. [DOI: 10.1080/01496395.2014.978464] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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33
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Luz Godino-Salido M, Santiago-Medina A, Arranz-Mascarós P, López-Garzón R, Gutiérrez-Valero MD, Melguizo M, Javier López-Garzón F. Novel active carbon/crown ether derivative hybrid material for the selective removal of Cu(II) ions: The crucial role of the surface chemical functions. Chem Eng Sci 2014. [DOI: 10.1016/j.ces.2014.04.014] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Gong Y, Gibson JK. Crown ether complexes of uranyl, neptunyl, and plutonyl: hydration differentiates inclusion versus outer coordination. Inorg Chem 2014; 53:5839-44. [PMID: 24828467 DOI: 10.1021/ic500724q] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The structures of actinyl-crown ether complexes are key to their extraction behavior in actinide partitioning. Only UO2(18C6)(2+) and NpO2(18C6)(+) (18C6 = 18-Crown-6) have been structurally characterized. We report a series of complexes of uranyl, neptunyl, and plutonyl with 18-Crown-6, 15-Crown-5 (15C5), and 12-Crown-4 (12C4) produced in the gas phase by electrospray ionization (ESI) of methanol solutions of AnO2(ClO4)2 (An = U, Np, or Pu) and crown ethers. The structures of 1:1 actinyl-crown ether complexes were deduced on the basis of their propensities to hydrate. Hydration of a coordinated metal ion requires that it be adequately exposed to allow further coordination by a water molecule; the result is that hydrates form for outer-coordination isomers but not for inclusion isomers. It is demonstrated that all the actinyl 18C6 complexes exhibit fully coordinated inclusion structures, while partially coordinated outer-coordination structures are formed with 12C4. Both inclusion and outer-coordination isomers were observed for actinyl-15C5 complexes, depending on whether they resulted from ESI or from collision-induced dissociation. Evidence for the formation of 1:2 complexes of actinyls with 15C5 and 12C4, which evidently exhibit bis-outer-coordination structures, is presented.
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Affiliation(s)
- Yu Gong
- Chemical Sciences Division, Lawrence Berkeley National Laboratory , One Cyclotron Road, MS 70A-1150, Berkeley, California 94720, United States
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Fraschetti C, Montagna M, Guarcini L, Guidoni L, Filippi A. Spectroscopic evidence for a gas-phase librating G-quartet–Na+ complex. Chem Commun (Camb) 2014; 50:14767-70. [DOI: 10.1039/c4cc05149a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Na+–G4 adduct exists as a mixture of two metastable populations, rapidly interconverting at room temperature.
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Affiliation(s)
- C. Fraschetti
- Pharmaceutical Chemistry and Technologies
- Sapienza-University of Rome
- Rome, Italy
| | - M. Montagna
- Pharmaceutical Chemistry and Technologies
- Sapienza-University of Rome
- Rome, Italy
| | - L. Guarcini
- Pharmaceutical Chemistry and Technologies
- Sapienza-University of Rome
- Rome, Italy
| | - L. Guidoni
- Chemistry
- Chemical and Materials Engineering
- L'Aquila University
- 67100 L'Aquila, Italy
| | - A. Filippi
- Pharmaceutical Chemistry and Technologies
- Sapienza-University of Rome
- Rome, Italy
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Stedwell CN, Galindo JF, Gulyuz K, Roitberg AE, Polfer NC. Crown Complexation of Protonated Amino Acids: Influence on IRMPD Spectra. J Phys Chem A 2012; 117:1181-8. [DOI: 10.1021/jp305263b] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Corey N. Stedwell
- Department of Chemistry
and Center for Chemical Physics, University of Florida, Gainesville, P.O. Box 117200, Florida 32611-7200,
United States
| | - Johan F. Galindo
- Department of Chemistry
and Quantum Theory Project, University of Florida, Gainesville, P.O. Box 118435, Florida 32611-8435,
United States
| | - Kerim Gulyuz
- Department of Chemistry
and Center for Chemical Physics, University of Florida, Gainesville, P.O. Box 117200, Florida 32611-7200,
United States
| | - Adrian E. Roitberg
- Department of Chemistry
and Quantum Theory Project, University of Florida, Gainesville, P.O. Box 118435, Florida 32611-8435,
United States
| | - Nicolas C. Polfer
- Department of Chemistry
and Center for Chemical Physics, University of Florida, Gainesville, P.O. Box 117200, Florida 32611-7200,
United States
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Filippi A, Fraschetti C, Piccirillo S, Rondino F, Botta B, D'Acquarica I, Calcaterra A, Speranza M. Chirality effects on the IRMPD spectra of basket resorcinarene/nucleoside complexes. Chemistry 2012; 18:8320-8. [PMID: 22696428 DOI: 10.1002/chem.201200614] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Indexed: 11/12/2022]
Abstract
The IRMPD spectra of the ESI-formed proton-bound complexes of the R,R,R,R- and S,S,S,S-enantiomers of a bis(diamido)-bridged basket resorcin[4]arene (R and S) with cytosine (1), cytidine (2), and cytarabine (3) were measured in the region 2800-3600 cm(-1). Comparison of the IRMPD spectra with the corresponding ONIOM (B3LYP/6-31(d):UFF)-calculated absorption frequencies allowed the assessment of the vibrational modes that are responsible for the observed spectroscopic features. All of the complexes investigated, apart from [R⋅H⋅3](+), showed similar IRMPD spectra, which points to similar structural and conformational landscapes. Their IRMPD spectra agree with the formation of several isomeric structures in the ESI source, wherein the N(3)-protonated guest establishes noncovalent interactions with the host amidocarbonyl groups that are either oriented inside the host cavity or outside it between one of the bridged side-chains and the upper aromatic nucleus. The IRMPD spectrum of the [R⋅H⋅3](+) complex was clearly different from the others. This difference is attributed to the effect of intramolecular hydrogen-bonding interactions between the C(2')-OH group and the aglycone oxygen atom of the nucleosidic guest upon repulsive interactions between the same oxygen atom and the aromatic rings of the host.
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Affiliation(s)
- Antonello Filippi
- Dipartimento di Chimica e Tecnologie del Farmaco, Università di Roma La Sapienza, 00185 Roma, Italy
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Shishido R, Kuo JL, Fujii A. Structures and dissociation channels of protonated mixed clusters around a small magic number: infrared spectroscopy of ((CH3)3N)n-H(+)-H2O (n = 1-3). J Phys Chem A 2012; 116:6740-9. [PMID: 22630614 DOI: 10.1021/jp3026144] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The magic number behavior of ((CH(3))(3)N)(n)-H(+)-H(2)O clusters at n = 3 is investigated by applying infrared spectroscopy to the clusters of n = 1-3. Structures of these clusters are determined in conjunction with density functional theory calculations. Dissociation channels upon infrared excitation are also measured, and their correlation with the cluster structures is examined. It is demonstrated that the magic number cluster has a closed-shell structure, in which the water moiety is surrounded by three (CH(3))(3)N molecules. The ion core (protonated site) of the clusters is found to be (CH(3))(3)NH(+) for n = 1-3, but coexistence of an isomer of the H(3)O(+) ion core cannot be ruled out for n = 3. Large rearrangement of the cluster structures of n = 2 and 3 before dissociation, which has been suggested in the mass spectrometric studies, is confirmed on the basis of the structure determination by infrared spectroscopy.
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Affiliation(s)
- Ryunosuke Shishido
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
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Hurtado P, Gámez F, Hamad S, Martínez–Haya B, Steill JD, Oomens J. Multipodal coordination of a tetracarboxylic crown ether with NH 4+: A vibrational spectroscopy and computational study. J Chem Phys 2012; 136:114301. [DOI: 10.1063/1.3693518] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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Gámez F, Martínez-Haya B, Blanco S, López JC, Alonso JL. High-Resolution Rotational Spectroscopy of a Cyclic Ether. J Phys Chem Lett 2012; 3:482-485. [PMID: 26286051 DOI: 10.1021/jz201678w] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The conformational landscape of crown ethers has constituted a central topic in the development of host-guest supramolecular chemistry. We report a high-resolution rotational study of a crown ether, 1,4,7,10,13-pentaoxacyclopentadecane (15-crown-5), by means of molecular beam Fourier transform microwave spectroscopy. The considerable size and the broad range of conformations allowed by the flexibility of the cyclic backbone of this ether pose important challenges to spectroscopy approaches. In this investigation, three stable rotamers of the 15-crown-5 ether have been identified and characterized through their rotational constants and centrifugal distortion coefficients. Ab initio quantum calculations at the MP2 level predict these conformers as the most stable ones for the title system and reproduce accurately their distinct structural features. The results pave the ground for an extensive survey of the conformational landscape of the 15-crown-5 and related cyclic ethers in the near term.
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Affiliation(s)
- F Gámez
- †Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013 Seville, Spain
| | - B Martínez-Haya
- †Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013 Seville, Spain
| | - S Blanco
- ‡Grupo de Espectroscopía Molecular, Edificio Quifima, Área de Química Física, Campus Miguel Delibes, Universidad de Valladolid, 47011 Valladolid, Spain
| | - J C López
- ‡Grupo de Espectroscopía Molecular, Edificio Quifima, Área de Química Física, Campus Miguel Delibes, Universidad de Valladolid, 47011 Valladolid, Spain
| | - J L Alonso
- ‡Grupo de Espectroscopía Molecular, Edificio Quifima, Área de Química Física, Campus Miguel Delibes, Universidad de Valladolid, 47011 Valladolid, Spain
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Moreno JRA, Ureña FP, González JJL, Gámez F, Martínez-Haya B. Conformational landscape of a chiral crown ether: a vibrational circular dichroism spectroscopy and computational study. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.tetasy.2012.02.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Gámez F, Hurtado P, Hamad S, Martínez-Haya B, Berden G, Oomens J. Tweezer-like Complexes of Crown Ethers with Divalent Metals: Probing Cation-Size-Dependent Conformations by Vibrational Spectroscopy in the Gas Phase. Chempluschem 2012. [DOI: 10.1002/cplu.201100044] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Gámez F, Martínez-Haya B, Blanco S, López JC, Alonso JL. Microwave spectroscopy and quantum chemical investigation of nine low energy conformers of the 15-crown-5 ether. Phys Chem Chem Phys 2012; 14:12912-8. [PMID: 22898803 DOI: 10.1039/c2cp41635b] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- F Gámez
- Department of Physical, Chemical and Natural Systems, Universidad Pablo de Olavide, 41013 Seville, Spain
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