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V M V, Pola S, Chetti P. Optoelectronic and charge transport properties of D-n-A type 1,3,5-triazine derivatives: A combined experimental and DFT study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 245:118940. [PMID: 32979810 DOI: 10.1016/j.saa.2020.118940] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 08/28/2020] [Accepted: 09/07/2020] [Indexed: 06/11/2023]
Abstract
The synthesis of five D-n-A type star-shaped octupolar molecules is presented in the current work. The exploration of the potential applicability of molecules under study in organic optoelectronics as electron or hole transporting materials is carried out by DFT methods. All the molecules have a 1,3,5-triazine core, which acts as an electron acceptor (A). Phenyl ring and pyridine ring act as electron donors (D) in AZ and PZ series of molecules respectively. The donor and acceptor core are connected by -NH bridge (n). The crystal structure of a molecule in the PZ series is elucidated. Thermogravimetric studies are carried out to confirm the thermal stability of molecules. The frontier molecular orbitals of molecules are characterized with the help of cyclic voltammetry. With the assistance of DFT methodologies, the whole research presented in this work focuses on the electronic excitations, reorganization energies, electron affinity, ionization potential and features of frontier molecular orbitals of molecules. The investigation of the variation of optoelectronic properties of molecules with changing patterns of nucleophilic substitution on 1,3,5-triazine core and presence of a hetero (nitrogen) atom in the donor part of the molecule is also accomplished.
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Affiliation(s)
- Vidya V M
- Department of Chemistry, National Institute of Technology, Kurukshetra 136119, Haryana, India
| | - Someshwar Pola
- Department of Chemistry, Osmania University, Hyderabad 500007, Telangana, India
| | - Prabhakar Chetti
- Department of Chemistry, National Institute of Technology, Kurukshetra 136119, Haryana, India.
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3
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Beto CC, Zeman CJ, Yang Y, Bullock JD, Holt ED, Kane AQ, Makal TA, Yang X, Ghiviriga I, Schanze KS, Veige AS. An Application Exploiting Aurophilic Bonding and iClick to Produce White Light Emitting Materials. Inorg Chem 2020; 59:1893-1904. [PMID: 31961144 DOI: 10.1021/acs.inorgchem.9b03195] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The paper focuses on exploiting aurophilic bonding to produce white light emitting materials. Inorganic Click (iClick) is employed to link two or four Au(I) metal ions through a triazolate bridge. Depending on the choice of phosphine ligand (PEt3 or PPh3), dinuclear Au2-FO or tetranuclear Au4-FO complexes can be controllably synthesized (FO = 2-(9,9-dioctylfluoreneyl-)). The iClick products Au2-FO and Au4-FO are characterized by combustion analysis and multinuclear NMR, TOCSY 1D, 1H-13C gHMBC, and 1H-13C gHSQC. In addition, the photophysical properties of Au2-FO and Au4-FO were examined in THF solution. Transient absorption spectroscopy was employed to elucidate the excited state features of the gold compounds. Solution processed OLEDs were fabricated and characterized, which gave white light electroluminescence with CIE coordinates (0.34, 0.36), as seen referenced to CIE standard illuminant D65 (0.31, 0.32). TDDFT computational analysis of Au2-FO and Au4-FO reveals the origin of light emission. In the case of Au4-FO, direct excitation leads to increased aurophilic bonding in the excited state, and as a result the emission profile is broadened to cover a larger region of the visible spectrum, thus giving white light emission. Designing molecules that can access or increase aurophilic bonding in the excited state provides another tool for fine-tuning the emission profiles of gold complexes.
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Affiliation(s)
- Christopher C Beto
- Department of Chemistry, Center for Catalysis , University of Florida , P.O. Box 117200 , Gainesville , Florida 32611 , United States
| | - Charles J Zeman
- Department of Chemistry, Center for Catalysis , University of Florida , P.O. Box 117200 , Gainesville , Florida 32611 , United States
| | - Yajing Yang
- Department of Chemistry , University of Texas at San Antonio , One UTSA Circle , San Antonio , Texas 78249 , United States
| | - James D Bullock
- Department of Chemistry, Center for Catalysis , University of Florida , P.O. Box 117200 , Gainesville , Florida 32611 , United States
| | - Ethan D Holt
- Department of Chemistry, Center for Catalysis , University of Florida , P.O. Box 117200 , Gainesville , Florida 32611 , United States
| | - Alexander Q Kane
- Department of Chemistry, Center for Catalysis , University of Florida , P.O. Box 117200 , Gainesville , Florida 32611 , United States
| | - Trevor A Makal
- Department of Chemistry, Center for Catalysis , University of Florida , P.O. Box 117200 , Gainesville , Florida 32611 , United States
| | - Xi Yang
- Department of Chemistry, Center for Catalysis , University of Florida , P.O. Box 117200 , Gainesville , Florida 32611 , United States
| | - Ion Ghiviriga
- Department of Chemistry, Center for Catalysis , University of Florida , P.O. Box 117200 , Gainesville , Florida 32611 , United States
| | - Kirk S Schanze
- Department of Chemistry , University of Texas at San Antonio , One UTSA Circle , San Antonio , Texas 78249 , United States
| | - Adam S Veige
- Department of Chemistry, Center for Catalysis , University of Florida , P.O. Box 117200 , Gainesville , Florida 32611 , United States
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Seintis K, Agathangelou D, Cvejn D, Almonasy N, Bureš F, Giannetas V, Fakis M. Femtosecond to nanosecond studies of octupolar molecules and their quadrupolar and dipolar analogues. Phys Chem Chem Phys 2017; 19:16485-16497. [DOI: 10.1039/c7cp01463e] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The fs–ps anisotropy dynamics of octupolar, quadrupolar and dipolar molecules with different π-bridges.
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Affiliation(s)
- K. Seintis
- Department of Physics
- University of Patras
- Patras
- Greece
| | | | - D. Cvejn
- Institute of Organic Chemistry and Technology
- Faculty of Chemical Technology
- University of Pardubice
- Pardubice
- Czech Republic
| | - N. Almonasy
- Institute of Organic Chemistry and Technology
- Faculty of Chemical Technology
- University of Pardubice
- Pardubice
- Czech Republic
| | - F. Bureš
- Institute of Organic Chemistry and Technology
- Faculty of Chemical Technology
- University of Pardubice
- Pardubice
- Czech Republic
| | - V. Giannetas
- Department of Physics
- University of Patras
- Patras
- Greece
| | - M. Fakis
- Department of Physics
- University of Patras
- Patras
- Greece
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