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Theoretical Study on the Structures, Electronic Properties, and Aromaticity of Thiophene Analogues of Anti-Kekulene. CHEMISTRY 2022. [DOI: 10.3390/chemistry4040102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
We predict the geometries, electronic properties, and aromaticity of thiophene analogues of anti-kekulene with six to nine thiophene rings 1–4, together with those of cyclobutadithiophenes (CDTs) and anti-kekulene as reference compounds, using density functional theory calculations. Investigation of the simplest reference compounds, CDTs, reveals that the local aromaticity of their thiophene rings is influenced by their fused position (b- or c-bond) to the four-membered ring (4MR). A thiophene ring fused at the b-position (b-TR) retains its aromatic character to some extent, whereas the aromatic character of one fused at the c-position is attenuated. The 4MR with two fused b-TRs retains a strong anti-aromatic character. Thiophene analogues of anti-kekulene with six to eight thiophene rings 1–3 favor bowl-shaped structures, in contrast to the planar structure of anti-kekulene, because of the shorter distances of the sulfur bridges. Compound 4, with nine thiophene rings, adopts a planar structure. The local aromaticity and anti-aromaticity of the thiophene ring and 4MR are significantly attenuated in 1–4 compared with the reference compounds, the CDTs and anti-kekulene. This can be attributed to the considerable contribution of the quinoidal electronic structure in 1–4. The present study provides new insight into the aromatic and electronic nature of systems containing cyclobutadienothiophene.
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2
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Balasubramanian K. Density Functional and Graph Theory Computations of Vibrational, Electronic and Topological Properties of Porous Nanographenes. J PHYS ORG CHEM 2022. [DOI: 10.1002/poc.4435] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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3
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Song YD, Wang QT, Gao WW, He Z, Wu Y. Theoretical study of electronic and nonlinear optical properties of novel graphenylene-based materials with donor-acceptor frameworks. J Mol Model 2022; 28:165. [PMID: 35608685 DOI: 10.1007/s00894-022-05162-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Accepted: 05/12/2022] [Indexed: 11/25/2022]
Abstract
A new functionalized graphenylene-based structure was designed by adsorbing of alkali metals M3 and superalkali M3O (M = Li, Na, K) on graphenylene (BPC) surface. The spectral data show that the spectral properties of the M3O@BPC system are very similar because the two-dimensional material plays a major role in the main transition. However, for M3@BPC system, the spectral shapes of the three systems show significant changes compared to each other because the different alkali metals play a major role in the main transition process. The calculation results show that the introduction of superalkali does not significantly increase the first polarizability; however, the introduction of alkali metals can obtain considerable nonlinear optical materials. For M3@BPC system, the first hyperpolarizability increases significantly when heavier alkali metal is introduced into the two-dimensional structure, which is found to be 866,290.9 au for K3@ BPC. A two-level model and first hyperpolarizability density can explain the large first polarizability of these systems.
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Affiliation(s)
- Yao-Dong Song
- School of Electronic, Electrical Engineering and Physics, Fujian University of Technology, Fuzhou, Fujian, 350118, People's Republic of China.
| | - Qian-Ting Wang
- Fujian Provincial Key Laboratory of Advanced Materials Processing and Application, Fuzhou, People's Republic of China.
- Sanming University, Sanming, Fujian, 365004, People's Republic of China.
- Fujian Provincial Engineering Research Center of Die & Mold, Fuzhou, People's Republic of China.
- Mould Technology Development Base of Fujian Province, Fuzhou, People's Republic of China.
- Fuzhou Innovation Platform for Novel Materials and Mould Technology, Fuzhou, People's Republic of China.
- Fujian University of Technology, Fuzhou, Fujian, 350118, People's Republic of China.
| | - Wei-Wei Gao
- School of Electronic, Electrical Engineering and Physics, Fujian University of Technology, Fuzhou, Fujian, 350118, People's Republic of China
| | - Zhixiong He
- School of Electronic, Electrical Engineering and Physics, Fujian University of Technology, Fuzhou, Fujian, 350118, People's Republic of China
| | - Yan Wu
- School of Electronic, Electrical Engineering and Physics, Fujian University of Technology, Fuzhou, Fujian, 350118, People's Republic of China
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Zeng Z, Guo D, Wang T, Chen Q, Matěj A, Huang J, Han D, Xu Q, Zhao A, Jelínek P, de Oteyza DG, McEwen JS, Zhu J. Chemisorption-Induced Formation of Biphenylene Dimer on Ag(111). J Am Chem Soc 2021; 144:723-732. [PMID: 34964646 DOI: 10.1021/jacs.1c08284] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
We report an example that demonstrates the clear interdependence between surface-supported reactions and molecular-adsorption configurations. Two biphenyl-based molecules with two and four bromine substituents, i.e., 2,2'-dibromobiphenyl (DBBP) and 2,2',6,6'-tetrabromo-1,1'-biphenyl (TBBP), show completely different reaction pathways on a Ag(111) surface, leading to the selective formation of dibenzo[e,l]pyrene and biphenylene dimer, respectively. By combining low-temperature scanning tunneling microscopy, synchrotron radiation photoemission spectroscopy, and density functional theory calculations, we unravel the underlying reaction mechanism. After debromination, a biradical biphenyl can be stabilized by surface Ag adatoms, while a four-radical biphenyl undergoes spontaneous intramolecular annulation due to its extreme instability on Ag(111). Such different chemisorption-induced precursor states between DBBP and TBBP consequently lead to different reaction pathways after further annealing. In addition, using bond-resolving scanning tunneling microscopy and scanning tunneling spectroscopy, we determine with atomic precision the bond-length alternation of the biphenylene dimer product, which contains 4-, 6-, and 8-membered rings. The 4-membered ring units turn out to be radialene structures.
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Affiliation(s)
- Zhiwen Zeng
- National Synchrotron Radiation Laboratory, Department of Chemical Physics and Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei 230029, P. R. China
| | - Dezhou Guo
- The Gene & Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
| | - Tao Wang
- National Synchrotron Radiation Laboratory, Department of Chemical Physics and Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei 230029, P. R. China.,Donostia International Physics Center, San Sebastián 20018, Spain.,Centro de Fisica de Materiales, CFM/MPC, CSIC-UPV/EHU, San Sebastián 20018, Spain
| | - Qifan Chen
- Institute of Physics of the Czech Academy of Sciences, Cukrovarnická 10, 16200 Prague 6, Czechia
| | - Adam Matěj
- Institute of Physics of the Czech Academy of Sciences, Cukrovarnická 10, 16200 Prague 6, Czechia
| | - Jianmin Huang
- National Synchrotron Radiation Laboratory, Department of Chemical Physics and Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei 230029, P. R. China
| | - Dong Han
- National Synchrotron Radiation Laboratory, Department of Chemical Physics and Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei 230029, P. R. China
| | - Qian Xu
- National Synchrotron Radiation Laboratory, Department of Chemical Physics and Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei 230029, P. R. China
| | - Aidi Zhao
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, P. R. China
| | - Pavel Jelínek
- Institute of Physics of the Czech Academy of Sciences, Cukrovarnická 10, 16200 Prague 6, Czechia
| | - Dimas G de Oteyza
- Donostia International Physics Center, San Sebastián 20018, Spain.,Centro de Fisica de Materiales, CFM/MPC, CSIC-UPV/EHU, San Sebastián 20018, Spain.,Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
| | - Jean-Sabin McEwen
- The Gene & Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States.,Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States.,Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164, United States.,Department of Chemistry, Washington State University, Pullman, Washington 99164, United States.,Department of Biological Systems Engineering, Washington State University, Pullman, Washington 99164, United States
| | - Junfa Zhu
- National Synchrotron Radiation Laboratory, Department of Chemical Physics and Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, University of Science and Technology of China, Hefei 230029, P. R. China
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Symmetry and Combinatorial Concepts for Cyclopolyarenes, Nanotubes and 2D-Sheets: Enumerations, Isomers, Structures Spectra & Properties. Symmetry (Basel) 2021. [DOI: 10.3390/sym14010034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
This review article highlights recent developments in symmetry, combinatorics, topology, entropy, chirality, spectroscopy and thermochemistry pertinent to 2D and 1D nanomaterials such as circumscribed-cyclopolyarenes and their heterocyclic analogs, carbon and heteronanotubes and heteronano wires, as well as tessellations of cyclopolyarenes, for example, kekulenes, septulenes and octulenes. We establish that the generalization of Sheehan’s modification of Pólya’s theorem to all irreducible representations of point groups yields robust generating functions for the enumeration of chiral, achiral, position isomers, NMR, multiple quantum NMR and ESR hyperfine patterns. We also show distance, degree and graph entropy based topological measures combined with techniques for distance degree vector sequences, edge and vertex partitions of nanomaterials yield robust and powerful techniques for thermochemistry, bond energies and spectroscopic computations of these species. We have demonstrated the existence of isentropic tessellations of kekulenes which were further studied using combinatorial, topological and spectral techniques. The combinatorial generating functions obtained not only enumerate the chiral and achiral isomers but also aid in the machine construction of various spectroscopic and ESR hyperfine patterns of the nanomaterials that were considered in this review. Combinatorial and topological tools can become an integral part of robust machine learning techniques for rapid computation of the combinatorial library of isomers and their properties of nanomaterials. Future applications to metal organic frameworks and fullerene polymers are pointed out.
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Kavitha SRJ, Abraham J, Arockiaraj M, Jency J, Balasubramanian K. Topological Characterization and Graph Entropies of Tessellations of Kekulene Structures: Existence of Isentropic Structures and Applications to Thermochemistry, Nuclear Magnetic Resonance, and Electron Spin Resonance. J Phys Chem A 2021; 125:8140-8158. [PMID: 34469167 DOI: 10.1021/acs.jpca.1c06264] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Tessellations of kekulenes and cycloarenes are of considerable interest as nanomolecular belts in trapping and transportation of heavy metal ions and chloride ions, as they possess optimal electronic features and pore sizes. A class of cycloarenes called kekulenes have been the focus of several experimental and theoretical studies from the stand point of aromaticity, superaromaticity, chirality, and novel electrical and magnetic properties. In the present study, we investigate the entropies and topological characterization of different tessellations of kekulenes through topological computations of superaromatic structures with pores. We introduce the self-powered vertex degree-based topological indices and then derive the graph entropy measures for three different tessellations (zigzag, armchair, and rectangular) via various molecular descriptors that we derive here. Several applications to computing the molecular properties are pointed out. We demonstrate the existence of isentropic and yet nonisomorphic tessellations of kekulenes for the first time. The two tessellations are predicted to be quite close in energy with comparable energy gaps. Graph theory-based PPP methods with parameters derived from higher levels of theory are proposed to be promising tools for the predictions of relative stabilities of kekulene tessellations. We show that the developed techniques can be applied in the general context of artificial intelligence for the machine generation of nuclear magnetic resonance and electron spin resonance spectroscopic patterns as well as in robust computations of thermochemistry of a large combinatorial libraries of tessellations of kekulenes through the generation of bond-equivalence classes.
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Affiliation(s)
| | - Jessie Abraham
- Department of Mathematics, KCG College of Technology, Chennai 600097, India
| | | | - Joseph Jency
- Department of Mathematics, Loyola College, Chennai 600034, India
| | - Krishnan Balasubramanian
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287-1604, United States
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7
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Wang Y. Extension and Quantification of the Fries Rule and Its Connection to Aromaticity: Large-Scale Validation by Wave-Function-Based Resonance Analysis. J Chem Inf Model 2021; 62:5136-5148. [PMID: 34428367 DOI: 10.1021/acs.jcim.1c00735] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The Fries rule is a simple, intuitive tool to predict the most dominant Kekulé structures of polycyclic aromatic hydrocarbons (PAHs), which is valuable for understanding the structure, stability, reactivity, and aromaticity of these conjugated compounds. However, it still remains an empirical hypothesis, with limited qualitative applications. Herein, we verify, generalize, and quantify the Fries rule based on the recently developed resonance analysis of the DFT wave functions of over 1500 PAH and fullerene molecules with over a billion Kekulé structures. The extended rules, counting the numbers of electrons within all rings (not just sextets), are able to rank the relative importance of all Kekulé structures for all considered systems. The statistically meaningful quantification also opens a way to evaluate ring aromaticity based on the resonance theory, which generally agrees well with conventional aromaticity descriptors. Furthermore, we propose a purely graph-based aromaticity indicator nicely applicable to PAHs and fullerenes, with no need of any quantum chemistry calculations, so that it can make valuable predictions for molecular properties that are related to local aromaticity.
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Affiliation(s)
- Yang Wang
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
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Motallebipour MS, Karimi-Sabet J. Graphenylene and inorganic graphenylene nanopores for gas-phase 4He/ 3He separation: kinetic and steady-state considerations. Phys Chem Chem Phys 2021; 23:14706-14715. [PMID: 34190225 DOI: 10.1039/d0cp05755j] [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
Selective membrane-based separation of light isotopes is considered to be possible based on the quantum phenomena. In this regard, the role of two mass-dependent effects, quantum tunneling and zero-point energy (ZPE), is realized to be consequential for selective separation of helium isotopes using appropriate membranes. In the present study, the efficiency of two analogous nanoporous membranes, graphenylene (GP) and inorganic graphenylene (IGP), for gas phase separation of 3He and 4He has been theoretically investigated. Since the performance of the studied membranes is extremely influenced by the close competition between both quantum tunneling and zero-point energy (ZPE) effects, high precision in the calculations is required to provide more realistic theoretical predictions. The current study attempts to provide such predictions by applying domain-based local pair natural orbital coupled cluster theory (DLPNO-CCSD) to obtain the accurate helium-pore interaction potential, based on which the tunneling rates, as well as the exact (anharmonic) bound levels for the vibration of helium in the pore plane, are calculated. From the analysis of the obtained results, the performance of the GP and IGP nanopores has been investigated in both kinetic competition and steady-state conditions in the temperature range of 10-200 K. The results of this study indicate that harmonic oscillator approximation significantly overestimates the efficiency of the studied nanopores for helium isotope separation. Based on our accurate calculations, both GP and IGP nanopores provide almost similar selectivities in kinetic competition conditions (Stot4/3 ≈ 3 at T = 50 K); however, the predicted permeance for GP (10-8 mol m-2 s-1 bar-1) is about 100 times higher than that predicted for IGP under the same conditions. Under steady-state conditions, IGP has been shown to be more efficient than GP, since it provides acceptable values of separation factor at higher temperatures.
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Affiliation(s)
- Maryam S Motallebipour
- Multiscale Multiphysics Simulation and Computational Analysis, Advanced Separation and Simulation Research Center, Tehran, Iran.
| | - Javad Karimi-Sabet
- Multiscale Multiphysics Simulation and Computational Analysis, Advanced Separation and Simulation Research Center, Tehran, Iran. and NFCRS, Nuclear Science and Technology Research Institute, Tehran, Iran
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9
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Tang Y, Chen W, Zhang H, Wang Z, Teng D, Cui Y, Feng Z, Dai X. Single-atom metal-modified graphenylene as a high-activity catalyst for CO and NO oxidation. Phys Chem Chem Phys 2020; 22:16224-16235. [DOI: 10.1039/d0cp01062f] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, the adsorption behaviors and interactions of different gas species on single-metal atom-anchored graphenylene (M–graphenylene, M = Mn, Co, Ni, and Cu) sheets were investigated by first-principles calculations.
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Affiliation(s)
- Yanan Tang
- College of physics and Electronic Engineering
- Zhengzhou Normal University
- Zhengzhou 450044
- China
| | - Weiguang Chen
- College of physics and Electronic Engineering
- Zhengzhou Normal University
- Zhengzhou 450044
- China
| | - Hongwei Zhang
- College of physics and Electronic Engineering
- Zhengzhou Normal University
- Zhengzhou 450044
- China
| | - Zhiwen Wang
- College of physics and Electronic Engineering
- Zhengzhou Normal University
- Zhengzhou 450044
- China
| | - Da Teng
- College of physics and Electronic Engineering
- Zhengzhou Normal University
- Zhengzhou 450044
- China
| | - Yingqi Cui
- College of physics and Electronic Engineering
- Zhengzhou Normal University
- Zhengzhou 450044
- China
| | - Zhen Feng
- School of Physics
- Henan Normal University
- Xinxiang
- China
| | - Xianqi Dai
- College of physics and Electronic Engineering
- Zhengzhou Normal University
- Zhengzhou 450044
- China
- School of Physics
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10
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Anjalikrishna PK, Suresh CH, Gadre SR. Electrostatic Topographical Viewpoint of π-Conjugation and Aromaticity of Hydrocarbons. J Phys Chem A 2019; 123:10139-10151. [PMID: 31647654 DOI: 10.1021/acs.jpca.9b09056] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A molecular electrostatic potential (MESP) topographical study has been conducted for a variety of conjugated hydrocarbons at B3LYP/6-311+G(d,p) level of theory to understand their π-conjugation features and aromaticity. The value of MESP minimum (Vm) is related to the localized and delocalized distribution of π-electron density. The Vm values are located interior to the rings in polycyclic benzenoid hydrocarbons (PBHs), whereas they lie outside the boundary of the rings in antiaromatic and in fused systems consisting of aromatic and antiaromatic moieties. The Vm points lie on top and bottom of the π-regions in linear polyenes and annulenes, while a degenerate distribution of CPs around the midpoint region of triple bonds is observed in alkynes. The eigenvalues λ1, λ2, and λ3 of the Hessian matrix at Vm(MESP minima) are used to define the aromatic character of the cyclic structures. The eigenvalues follow the trend λ1 ≫ λ2 > λ3 ≅ 0 in PBHs, λ1 > λ2 > λ3 ≅ 0 in linear polyenes, and λ1 > λ2 > λ3 ≠ 0 in antiaromatic systems. The difference in the aromatic character of PBHs from that of benzene is related to the deviations Δλ1, Δλ2, and Δλ3. The total deviation ∑i=13Δλi is found to be ≤ 0.011 au for all aromatic systems and lies between 0.011 and 0.035 au for all nonaromatic systems. For antiaromatic systems, its value is found to be above 0.035 au. Further, ∑i=13Δλi gives a direct interpretation of Clar's aromatic sextet structures for PBHs. In summary, MESP topography mapping is a powerful technique to quantify the localized and delocalized π-electron distribution in a variety of unsaturated hydrocarbon systems.
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Affiliation(s)
- Puthannur K Anjalikrishna
- Chemical Sciences and Technology Division , CSIR-National Institute for Interdisciplinary Science and Technology , Thiruvananthapuram , Kerala 695019 , India.,Academy of Scientific and Innovative Research (AcSIR) , Ghaziabad 201002 , India
| | - Cherumuttathu H Suresh
- Chemical Sciences and Technology Division , CSIR-National Institute for Interdisciplinary Science and Technology , Thiruvananthapuram , Kerala 695019 , India.,Academy of Scientific and Innovative Research (AcSIR) , Ghaziabad 201002 , India
| | - Shridhar R Gadre
- Interdisciplinary School of Scientific Computing , Savitribai Phule Pune University , Pune 411007 , India
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Hashimoto S, Tahara K. Theoretical Study on the Geometry, Aromaticity, and Electronic Properties of Benzo[3,4]cyclobutathiophenes and Their Homologues. J Org Chem 2019; 84:9850-9858. [PMID: 31310116 DOI: 10.1021/acs.joc.9b00661] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The geometry, aromaticity, and electronic properties of benzo[3,4]cyclobutathiophenes (BCTs) and their homologues have been examined theoretically using density functional theory calculations. The harmonic oscillator measure of aromaticity and nucleus-independent chemical shift analyses revealed the aromaticity characteristics of the two regioisomers benzo[3,4]cyclobuta[1,2-b]thiophene and benzo[3,4]cyclobuta[1,2-c]thiophene. When the aromaticity of one of the six-π-electron rings increases, it concomitantly decreases in the other ring. The anti-aromaticity of the four-membered ring varies depending on the π-electron density of the shared bond with the thiophene ring. This leads to a large difference of the highest occupied molecular orbital-lowest unoccupied molecular orbital gap between the isomers. Linear BCT homologues show medium diradical characters and the smallest EGap values. In the angular and branched homologues, the π-electrons of central benzene rings are localized avoiding the shared bonds, which results in a nonaromatic character. These data were compared to those of the parent hydrocarbons. Because of the diene character of the thiophene ring, the number and position of annulated thiophenocyclobutadieno moieties significantly influence the aromaticity and EGap values of BCT homologues. The present study does not only provide insight into the aromaticity and the properties of organic compounds containing four-membered rings but also affords helpful design guidelines of novel organic semiconductors.
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Affiliation(s)
- Shingo Hashimoto
- Department of Applied Chemistry, School of Science and Technology , Meiji University , 1-1-1 Higashimita , Tama-ku, Kawasaki , Kanagawa 214-8571 , Japan
| | - Kazukuni Tahara
- Department of Applied Chemistry, School of Science and Technology , Meiji University , 1-1-1 Higashimita , Tama-ku, Kawasaki , Kanagawa 214-8571 , Japan
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12
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Randić M. Benzenoid rings resonance energies and local aromaticity of benzenoid hydrocarbons. J Comput Chem 2018. [DOI: 10.1002/jcc.25760] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Milan Randić
- Labortor for Chemometrics; National Institute of Chemistry; Ljubljana Slovenia
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13
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Balasubramanian K. Combinatorial Enumeration of Isomers of Superaromatic Polysubstituted Cycloarenes and Coronoid Hydrocarbons with Applications to NMR. J Phys Chem A 2018; 122:8243-8257. [PMID: 30232892 DOI: 10.1021/acs.jpca.8b08784] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We have employed combinatorial techniques based on character cycle indices, Pólya's theory, and Euler totem function to enumerate isomers of polysubstituted cycloarenes and coronoid hydrocarbons which have been receiving considerable attention because of their superaromaticity, ring currents, and interesting magnetic properties. Systematic enumeration and construction of tables of polysubstituted isomers such as fluoro-chloro superaromatic hydrocarbons are considered as they are of interest in the study of environmental pollutants and toxicity. Isomers of fluoro-chloro polysubstituted donut shaped circumkekulenes, circumseptulenes, circumoctulenes, etc., are enumerated in addition to other cycloarenes, polycyclic circumcoronaphenes and coronoids. Applications to 13C NMR, proton NMR and multiple quantum NMR spectroscopies of these superaromatic species are considered.
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Affiliation(s)
- Krishnan Balasubramanian
- School of Molecular Sciences , Arizona State University , Tempe , Arizona 85287-1604 , United States
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14
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An extension of the Fries rule to non-benzenoid hydrocarbons having four-atomic rings. MONATSHEFTE FUR CHEMIE 2018. [DOI: 10.1007/s00706-017-2133-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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15
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16
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Ferguson D, Searles DJ, Hankel M. Biphenylene and Phagraphene as Lithium Ion Battery Anode Materials. ACS APPLIED MATERIALS & INTERFACES 2017; 9:20577-20584. [PMID: 28562009 DOI: 10.1021/acsami.7b04170] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We present results of density functional theory calculations on the lithium (Li) ion storage capacity of biphenylene (BP) membrane and phagraphene (PhG) which are two-dimensional defected-graphene-like membranes. Both membranes show a larger capacity than graphene, Li2C6 and Li1.5C6 compared to LiC6. We find that Li is very mobile on these materials and does not interact as strongly with the membranes. In the case of BP we also investigated the possible volume expansion on Li insertion. We find a 11% expansion, which is very similar to the one found in graphite. Our findings show that both membranes are suitable materials for lithium ion battery anodes.
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Affiliation(s)
- David Ferguson
- Australian Institute for Bioengineering and Nanotechnology and ‡School of Chemistry and Molecular Biosciences, The University of Queensland , Brisbane, QLD 4072, Australia
| | - Debra J Searles
- Australian Institute for Bioengineering and Nanotechnology and ‡School of Chemistry and Molecular Biosciences, The University of Queensland , Brisbane, QLD 4072, Australia
| | - Marlies Hankel
- Australian Institute for Bioengineering and Nanotechnology and ‡School of Chemistry and Molecular Biosciences, The University of Queensland , Brisbane, QLD 4072, Australia
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17
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Hankel M, Searles DJ. Lithium storage on carbon nitride, graphenylene and inorganic graphenylene. Phys Chem Chem Phys 2016; 18:14205-15. [DOI: 10.1039/c5cp07356a] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
We present results of density functional theory calculations on the lithium (Li) ion storage capacity of three different two dimensional porous graphene-like membranes.
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Affiliation(s)
- Marlies Hankel
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Brisbane
- Australia
| | - Debra J. Searles
- Australian Institute for Bioengineering and Nanotechnology
- The University of Queensland
- Brisbane
- Australia
- School of Chemistry and Molecular Biosciences
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18
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Oña-Ruales JO, Ruiz-Morales Y. Extended Y-Rule Method for the Characterization of the Aromatic Sextets in Cata-Condensed Polycyclic Aromatic Hydrocarbons. J Phys Chem A 2014; 118:12262-73. [DOI: 10.1021/jp510180j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Jorge O. Oña-Ruales
- National Institute of Standards and Technology, NIST, Gaithersburg, Maryland 20899, United States
| | - Yosadara Ruiz-Morales
- Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas Norte 152, Mexico City 07730, Mexico
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Radenković S, Tošović J, Havenith RWA, Bultinck P. Ring Currents in Benzo- and Benzocyclobutadieno-Annelated Biphenylene Derivatives. Chemphyschem 2014; 16:216-22. [DOI: 10.1002/cphc.201402468] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Indexed: 11/06/2022]
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Abstract
Polycyclic aromatic hydrocarbons (PAHs) and fully-conjugated ladder polymers are leading candidates for organics electronics, as their inherent conformational rigidity encourages electron delocalization. Many of these systems consist of fused benzenoid or heterocyclic aromatic rings. Less frequently, however, PAHs are reported with character that alternates between the aromaticity of benzene fragments and the antiaromaticity of a nonbenzenoid moiety. This chapter will focus on recent work published on the theory, synthesis, and properties of two such systems: [N]phenylenes containing 4π-electron cyclobutadienoid character, and diaryl[a,e]pentalenes containing 8π-electron pentalenoid character.
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