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Ahmed RB, Susai BM, Sadasivuni KK, Babu GN, Susairaj JP, Ramamoorthy R, Muruganandam L. Theoretical investigations on electronic structure and optoelectronic properties of vinyl fused monomeric and oligomeric benzimidazole derivatives using DFT and TDDFT techniques. J Mol Model 2024; 30:40. [PMID: 38227112 DOI: 10.1007/s00894-024-05830-6] [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: 11/24/2023] [Accepted: 01/03/2024] [Indexed: 01/17/2024]
Abstract
CONTEXT The present work encompasses the theoretical investigation of 14 benzimidazole-based (seven vinyl fused monomeric benzimidazole (VFMBI) and seven vinyl fused oligomeric benzimidazole (VFOBI)) derivatives using density functional theory (DFT) and time-dependent density functional theory (TD-DFT) techniques. The effects of electron donor and acceptor groups on the electronic structure such as HOMO (highest occupied molecular orbital) and LUMO (lowest unoccupied molecular orbital) energies, HOMO-LUMO energy gap, ionization potentials (IPs), electron affinities (EAs), internal reorganization energies of holes and electrons (λh/e), and excited state properties have been explored in the present work. In addition, natural bond orbital (NBO) analysis of these compounds has been investigated to reveal the typical stabilization interactions in these molecules. Hence, the aim of the present work is to explore the electronic structures and optoelectronic properties of the title molecules on the basis of the DFT quantum chemical calculations and to make an idea on the parameters influencing the optoelectronic efficiency toward a better understanding of the structure-property relationships. Moreover, the calculated results reveal the suitable optoelectronic properties of benzimidazole oligomer derivatives using theoretical techniques. Of the investigated molecules, 4_MABIMCY and 4_MABIOCY show potential optoelectronic properties and can be used as a potential charge transport material due to their narrow band gap, high hyperpolarizability, low ionization potential, and high electron affinity. The larger λab and λem values favor the system to be used as a potential optoelectronic material with better optical properties. METHODS All quantum chemical calculations were carried out using Gaussian09 theoretical chemistry code. Ground state calculations were made using the B3LYP/6-31+G(d,p) method. All excited state calculations had been computed using TDB3P86/6-311++(d,p). The initial structure for excited state calculations was optimized using the AM1 semi-empirical method.
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Affiliation(s)
- Reshad Bushra Ahmed
- Department of Chemistry, College of Natural and Computational Sciences, Haramaya University, Dire Dawa, Ethiopia
| | - Boobalan Maria Susai
- Department of Chemistry, College of Natural and Computational Sciences, Haramaya University, Dire Dawa, Ethiopia.
- Cambridge International School, P.O. Box 23018, Doha, Al Nuaija East, Qatar.
| | - Kishore Kumar Sadasivuni
- Centre for Advanced Materials, Qatar University, Doha, Qatar
- Department of Mechanical and Industrial Engineering, Qatar University, PO Box 2713, Doha, Qatar
| | - G Neelaiah Babu
- Department of Chemistry, College of Natural and Computational Sciences, Haramaya University, Dire Dawa, Ethiopia
| | - Jone Pradeepa Susairaj
- Department of Physics, Annamalai University, Chidambaram, Tamil Nadu, 608 002, India
- Doha Modern Indian School, P.O. Box 47391, Doha, Abu Hamour, Qatar
| | - R Ramamoorthy
- Department of Physics, Arulmigu Palaniandavar College of Arts and Culture, Palani, Dindigul, Tamil Nadu, 624 601, India
| | - L Muruganandam
- Department of Chemistry, Saranathan College of Engineering, Tiruchirappalli, Tamil Nadu, 620012, India
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Muhammad US, Erkan S, Kaya S. Analysis of Boronic Acids Containing Amino Ferrocene by DFT Approach and In Silico Studies. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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A new 3-substituted BODIPY dye: Synthesis, crystal structure, photophysical, non-linear optic and OLED properties. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.132090] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Grodzicki M, Sito J, Lewandków R, Mazur P, Ciszewski A. Interfacial Polarization of Thin Alq 3, Gaq 3, and Erq 3 Films on GaN(0001). MATERIALS 2022; 15:ma15051671. [PMID: 35268914 PMCID: PMC8910984 DOI: 10.3390/ma15051671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 02/10/2022] [Accepted: 02/12/2022] [Indexed: 02/04/2023]
Abstract
This report presents results of research on electronic structure of three interfaces composed of organic layers of Alq3, Gaq3, or Erq3 deposited on GaN semiconductor. The formation of the interfaces and their characterization have been performed in situ under ultrahigh vacuum conditions. Thin layers have been vapor-deposited onto p-type GaN(0001) surfaces. Ultraviolet photoelectron spectroscopy (UPS) assisted by X-ray photoelectron spectroscopy (XPS) has been employed to construct the band energy diagrams of the substrate and interfaces. The highest occupied molecular orbitals (HOMOs) are found to be at 1.2, 1.7, and 2.2 eV for Alq3, Gaq3, and Erq3 layers, respectively. Alq3 layer does not change the position of the vacuum level of the substrate, in contrast to the other layers, which lower it by 0.8 eV (Gaq3) and 1.3 eV (Erq3). Interface dipoles at the phase boundaries are found to be −0.2, −0.9, −1.2 eV, respectively, for Alq3, Gaq3, Erq3 layers on GaN(0001) surfaces.
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Bridge effect on the charge transfer and optoelectronic properties of triphenylamine-based organic dye sensitized solar cells: theoretical approach. RESEARCH ON CHEMICAL INTERMEDIATES 2020. [DOI: 10.1007/s11164-020-04184-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Erkan S, Karakaş D. A theoretical study on cyclometalated iridium (III) complexes by using a density functional theory. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2020. [DOI: 10.1142/s0219633620500066] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Cyclometalated iridium (III) complexes (Ir1–Ir4) are calculated in detail with computational chemistry methods. The calculated structural parameters of Ir3 are compared with experimental values and a good fit is obtained. IR spectra are calculated at B3LYP/LANL2DZ/6-31G(d) level in the gases phase. Calculated 1H-NMR chemical shift values of the mentioned complexes are compared with the experimental data and all chemical shifts are assigned to the respective atoms. The quantum chemical parameters such as absolute hardness ([Formula: see text]), absolute softness ([Formula: see text]) electronegativity ([Formula: see text]), chemical potential ([Formula: see text]) and electronic charges ([Formula: see text]) are calculated and are associated with the experimental anti-cancer properties of the related complexes. Nonlinear optic properties of the Ir1–Ir4 were investigated with the average linear polarizability ([Formula: see text]), the anisotropy of the polarizability ([Formula: see text]), first hyperpolarizability ([Formula: see text]) values. Hole transfer ([Formula: see text]), electron transfer integrals ([Formula: see text]), hole reorganization energies ([Formula: see text]) and electron reorganization energies ([Formula: see text]) are examined. In addition, molecular docking study was performed. It was found that the molecular docking results are similar to the experimental anti-cancer trend.
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Affiliation(s)
- Sultan Erkan
- Yıldızeli Vocational School, Chemical and Chemical Company Technology, Cumhuriyet University, Sivas, Turkey
| | - Duran Karakaş
- Science Faculty, Department of Chemistry, Cumhuriyet University, 58140 Sivas, Turkey
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