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Maier P, Xavier NF, Truscott CL, Hansen T, Fouquet P, Sacchi M, Tamtögl A. How does tuning the van der Waals bonding strength affect adsorbate structure? Phys Chem Chem Phys 2022; 24:29371-29380. [PMID: 36448738 DOI: 10.1039/d2cp03468a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Organic molecular thin-films are employed for manufacturing a wide variety of electronic devices, including memory devices and transistors. A precise description of the atomic-scale interactions in aromatic carbon systems is of paramount importance for the design of organic thin-films and carbon-based nanomaterials. Here we investigate the binding and structure of pyrazine on graphite with neutron diffraction and spin-echo measurements. Diffraction data of the ordered phase of deuterated pyrazine, (C4D4N2), adsorbed on the graphite (0001) basal plane surface are compared to scattering simulations and complemented by van der Waals corrected density functional theory calculations. The lattice constant of pyrazine on graphite is found to be (6.06 ± 0.02) Å. Compared to benzene (C6D6) adsorption on graphite, the pyrazine overlayer appears to be much more thermodynamically stable, up to 320 K, and continues in layer-by-layer growth. Both findings suggest a direct correlation between the intensity of van der Waals bonding and the stability of the self-assembled overlayer because the nitrogen atoms in the six-membered ring of pyrazine increase the van der Waals bonding in comparison to benzene, which only contains carbon atoms.
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Affiliation(s)
- Philipp Maier
- Institute of Experimental Physics, Graz University of Technology, 8010 Graz, Austria.
| | - Neubi F Xavier
- Department of Chemistry, University of Surrey, Guildford GU2 7XH, UK
| | - Chris L Truscott
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK
| | - Thomas Hansen
- Institut Laue-Langevin, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - Peter Fouquet
- Institut Laue-Langevin, 71 Avenue des Martyrs, 38000 Grenoble, France
| | - Marco Sacchi
- Department of Chemistry, University of Surrey, Guildford GU2 7XH, UK
| | - Anton Tamtögl
- Institute of Experimental Physics, Graz University of Technology, 8010 Graz, Austria.
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Karton A. π–π interactions between benzene and graphene by means of large-scale DFT-D4 calculations. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2022.111606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kuznetsov AE. Review of research of nanocomposites based on graphene quantum dots. PHYSICAL SCIENCES REVIEWS 2022. [DOI: 10.1515/psr-2019-0135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Graphene quantum dots (GQDs) belong to the vast and versatile family of carbon nanomaterials. Their unique position amongst versatile carbon nanoparticles (NPs) originates from the properties of quantum confinement and edge effects. GQDs are similar to conventional semiconductor QDs due to their tunable band gaps and high photoluminescence activity. However, GQDs have superior characteristics due to their excellent biocompatibility, low toxicity, good water dispersibility, large optical absorptivity, high fluorescence activity and photostability. These properties have generated significant interest in GQDs applications in various fields: nanosensor fabrication, drug delivery, photocatalysis, photovoltaics, and photodynamic therapy. Numerous GQD-based nanocomposites/nanohybrides have been synthesized and/or studied computationally. This review focuses on recent computational studies of various GQD-based nanocomposites/nanohybrides and systems which can be related to them.
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Affiliation(s)
- Aleksey E. Kuznetsov
- Department of Chemistry , Universidad Tecnica Federico Santa Maria , Santiago , Chile
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Sajid H, Khan S, Ayub K, Amjad Gilani M, Mahmood T, Farooq U, Akhter MS. Ab initio study for superior sensitivity of graphyne nanoflake towards nitrogen halides over ammonia. J Mol Model 2022; 28:161. [PMID: 35597854 DOI: 10.1007/s00894-022-05159-y] [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: 01/13/2022] [Accepted: 05/12/2022] [Indexed: 11/30/2022]
Abstract
Graphyne (GYN) has received immense attention in gas adsorption applications due to its large surface area. The adsorption of toxic ammonia and nitrogen halides gaseous molecules on graphyne has been theoretically studied at ωB97XD/6-31 + G(d, p) level of DFT. The counterpoise corrected interaction energies of NH3, NF3, NCl3, and NBr3 molecules with GYN are - 4.73, - 2.27, - 5.22, and - 7.19 kcal mol-1, respectively. Symmetry-adapted perturbation theory (SAPT0) and noncovalent interaction index (NCI) reveal that the noncovalent interaction between analytes and GYN is dominated by dispersion forces. The significant change in electronic behavior, i.e., energies of HOMO and LUMO orbitals and NBO charge transfer correspond to the pronounced sensitivity of GYN towards considered analytes, especially NBr3. Finally, TD-DFT calculation reveals a decrease in electronic transition energies and shifting of adsorption to a longer wavelength. The recovery time for NX3@GYN is observed in nanoseconds, which is many orders of magnitude smaller than the reported systems. The recovery time is further decreased with increasing temperature, indicating that the GYN benefits from a short recovery time as a chemical sensor.
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Affiliation(s)
- Hasnain Sajid
- School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham, NG11 8NS, UK
| | - Sidra Khan
- Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, 22060, Pakistan
| | - Khurshid Ayub
- Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, 22060, Pakistan
| | - Mazhar Amjad Gilani
- Department of Chemistry, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan
| | - Tariq Mahmood
- Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, 22060, Pakistan. .,Department of Chemistry, College of Science, University of Bahrain, P. O. Box 32038, Zallaq, Bahrain.
| | - Umar Farooq
- Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, 22060, Pakistan
| | - Mohammed Salim Akhter
- Department of Chemistry, College of Science, University of Bahrain, P. O. Box 32038, Zallaq, Bahrain
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Park S, Kim HR, Kim J, Hong BH, Yoon HJ. Enhanced Thermopower of Saturated Molecules by Noncovalent Anchor-Induced Electron Doping of Single-Layer Graphene Electrode. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2103177. [PMID: 34453364 DOI: 10.1002/adma.202103177] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 06/22/2021] [Indexed: 06/13/2023]
Abstract
Enhancing thermopower is a key goal in organic and molecular thermoelectrics. Herein, it is shown that introducing noncovalent contact with a single-layer graphene (SLG) electrode improves the thermopower of saturated molecules as compared to the traditional gold-thiolate covalent contact. Thermoelectric junction measurements with a liquid-metal technique reveal that the value of Seebeck coefficient in large-area junctions based on n-alkylamine self-assembled monolayers (SAMs) on SLG is increased up to fivefold compared to the analogous junction based on n-alkanethiolate SAMs on gold. Experiments with Raman spectroscopy and field-effect transistor analysis indicate that such enhancements benefit from the creation of new in-gap states and electron doping through noncovalent interaction between the amine anchor and the SLG electrode, which leads to a reduced energy offset between the Fermi level and the transport channel. This work demonstrates that control of interfacial bonding nature in molecular junctions improves the Seebeck effect in saturated molecules.
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Affiliation(s)
- Sohyun Park
- Department of Chemistry, Korea University, Seoul, 02841, South Korea
| | - Hwa Rang Kim
- Department of Chemistry, Seoul National University, Seoul, 08826, South Korea
| | - Juhee Kim
- Department of Chemistry, Seoul National University, Seoul, 08826, South Korea
| | - Byung-Hee Hong
- Department of Chemistry, Seoul National University, Seoul, 08826, South Korea
| | - Hyo Jae Yoon
- Department of Chemistry, Korea University, Seoul, 02841, South Korea
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Koo S, Park I, Watanabe K, Taniguchi T, Shim JH, Ryu S. Extraordinary Photostability and Davydov Splitting in BN-Sandwiched Single-Layer Tetracene Molecular Crystals. NANO LETTERS 2021; 21:6600-6608. [PMID: 34283620 DOI: 10.1021/acs.nanolett.1c02009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Two-dimensional molecular crystals have been beyond the reach of systematic investigation because of the lack or instability of their well-defined forms. Here, we demonstrate drastically enhanced photostability and Davydov splitting in single and few-layer tetracene (Tc) crystals sandwiched between inorganic 2D crystals of graphene or hexagonal BN. Molecular orientation and long-range order mapped with polarized wide-field photoluminescence imaging and optical second-harmonic generation revealed high crystallinity of the 2D Tc and its distinctive orientational registry with the 2D inorganic crystals, which were also verified with first-principles calculations. The reduced dielectric screening in 2D space was manifested by enlarged Davydov splitting and attenuated vibronic sidebands in the excitonic absorption and emission of monolayer Tc crystals. Photostable 2D molecular crystals and their size effects will lead to novel photophysical principles and photonic applications.
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Affiliation(s)
- Seonghyun Koo
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk 37673, Korea
| | - Ina Park
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk 37673, Korea
| | - Kenji Watanabe
- National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Takashi Taniguchi
- National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
| | - Ji Hoon Shim
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk 37673, Korea
- Department of Physics and Division of Advanced Materials Science, Pohang University of Science and Technology, Pohang (POSTECH), Pohang 37673, Republic of Korea
| | - Sunmin Ryu
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk 37673, Korea
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Asif M, Sajid H, Ullah F, Khan S, Ayub K, Amjad Gilani M, Arshad M, Salim Akhter M, Mahmood T. Quantum chemical study on sensing of NH3, NF3, NCl3 and NBr3 by using cyclic tetrapyrrole. COMPUT THEOR CHEM 2021. [DOI: 10.1016/j.comptc.2021.113221] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Sheena Mary Y, Shyma Mary Y, Armaković S, Armaković SJ, Narayana B. Understanding reactivity of a triazole derivative and its interaction with graphene and doped/undoped-coronene—a DFT study. J Biomol Struct Dyn 2020; 40:2316-2326. [DOI: 10.1080/07391102.2020.1837677] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Y. Sheena Mary
- Department of Physics, Fatima Mata National College (Autonomous), Kollam, Kerala, India
| | - Y. Shyma Mary
- Department of Physics, Fatima Mata National College (Autonomous), Kollam, Kerala, India
| | - Stevan Armaković
- Department of Physics, Faculty of Sciences, University of Novi Sad, Novi Sad, Serbia
| | - Sanja J. Armaković
- Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Novi Sad, Serbia
| | - B. Narayana
- Department of Studies in Chemistry, Mangalore University, Mangalagangothri, Karnataka, India
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Zhour K, Otero-Mato JM, Hassan FEH, Fahs H, Vaezzadeh M, López-Lago E, Gallego LJ, Varela LM. Electronic and optical properties of borophene and graphene with an adsorbed ionic liquid: A density functional theory study. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113803] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Saha B, Bhattacharyya PK. Density Functional Study on the Adsorption of 5-Membered N-Heterocycles on B/N/BN-Doped Graphene: Coronene as a Model System. ACS OMEGA 2018; 3:16753-16768. [PMID: 31458306 PMCID: PMC6643900 DOI: 10.1021/acsomega.8b02340] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 11/23/2018] [Indexed: 05/07/2023]
Abstract
Adsorption of seven 5-membered N-heterocycles on B/N/BN-doped graphene (with coronene as a model system) has been studied using density functional theory (DFT). The geometry of the complexes validated the involvement of both π···π stacking and N-H···π interaction in the adsorption process. The stability of the complexes is measured in terms of stabilization energy, and the results suggested that the complexes are stable enough (stabilization energies are in the range of 7.61-14.77 kcal mol-1). Studies confirmed the stability of complexes in the solvent phase too irrespective of the dielectric of the solvent. Dispersive force is the major mode of interaction in stabilizing the complexes. Natural bond orbital analysis indicated a small contribution from electrostatic and covalent interactions. Thermochemical analysis revealed that the complexation is exothermic in nature and favorable at a lower temperature. Adsorption of N-heterocycles exerts a nominal impact on the electronic properties of the undoped/doped graphene. The study presents a simple approach to introduce an arbitrary functionality to undoped/doped graphene by preserving its electronic properties.
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Affiliation(s)
- Bapan Saha
- Department
of Chemistry, Handique Girls’ College, Panbazar, Guwahati 781001, Assam, India
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Karachevtsev V, Stepanian S, Karachevtsev M, Adamowicz L. Graphene induced molecular flattening of meso -5,10,15,20-tetraphenyl porphyrin: DFT calculations and molecular dynamics simulations. COMPUT THEOR CHEM 2018. [DOI: 10.1016/j.comptc.2018.04.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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13
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Zarudnev ES, Stepanian SG, Adamowicz L, Leontiev VS, Karachevtsev VA. Comparison of noncovalent interactions of zigzag and armchair carbon nanotubes with heterocyclic and aromatic compounds: Imidazole and benzene, imidazophenazines, and tetracene. Chem Phys 2017. [DOI: 10.1016/j.chemphys.2016.11.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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