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Quartapelle Procopio E, Boni A, Veronese L, Marcaccio M, Mercandelli P, Valenti G, Panigati M, Paolucci F. Dinuclear Re(I) Complexes as New Electrocatalytic Systems for CO
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Reduction. ChemElectroChem 2021. [DOI: 10.1002/celc.202100486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
| | - Alessandro Boni
- Dipartimento di Chimica ‘‘ Giacomo Ciamician'' Alma Mater Studiorum Università di Bologna via F. Selmi 2 40126 Bologna Italy
| | - Lorenzo Veronese
- Dipartimento di Chimica Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
| | - Massimo Marcaccio
- Dipartimento di Chimica ‘‘ Giacomo Ciamician'' Alma Mater Studiorum Università di Bologna via F. Selmi 2 40126 Bologna Italy
| | - Pierluigi Mercandelli
- Dipartimento di Chimica Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
| | - Giovanni Valenti
- Dipartimento di Chimica ‘‘ Giacomo Ciamician'' Alma Mater Studiorum Università di Bologna via F. Selmi 2 40126 Bologna Italy
| | - Monica Panigati
- Dipartimento di Chimica Università degli Studi di Milano Via Golgi 19 20133 Milano Italy
- Consorzio INSTM via G. Giusti 9 50121 Firenze Italy
| | - Francesco Paolucci
- Dipartimento di Chimica ‘‘ Giacomo Ciamician'' Alma Mater Studiorum Università di Bologna via F. Selmi 2 40126 Bologna Italy
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Anjali BA, Suresh CH. Absorption and emission properties of 5-phenyl tris(8-hydroxyquinolinato) M(III) complexes (M = Al, Ga, In) and correlations with molecular electrostatic potential. J Comput Chem 2020; 41:1497-1508. [PMID: 32289191 DOI: 10.1002/jcc.26193] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 03/09/2020] [Indexed: 11/07/2022]
Abstract
Substituent effect for a series of 5-phenyl tris(8-hydroxyquinolinato) M(III) complexes (Mq3) of aluminum, gallium, and indium are investigated using density functional theory (DFT) for the ground state properties and the time-dependent version of DFT (TDDFT) for their absorption and emission properties. A comparison between the ground state energy of mer and fac isomers of all the complexes revealed that the mer configuration is always more stable than fac. The substituent effect is significantly reflected at the fluorescence maximum (λF ) values whereas the effect is moderate at the absorption maximum (λabs ) values. The molecular electrostatic potential (MESP) at the metal center (VM ) and the most electron rich region indicated by MESP minimum (Vmin ), located at the oxygen of phenoxide ring exhibit excellent correlations with the λF and Stokes shift (λF -λabs ) values. The study suggests the use of Stokes shift as an experimental quantity to measure the excited state substituent effect while the Vmin or VM emerge as theoretical quantities to measure the same.
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Affiliation(s)
- Bai A Anjali
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Trivandrum, India.,Academy of Scientific & Innovative Research (AcSIR), CSIR-NIIST Campus, Trivandrum, India
| | - Cherumuttathu H Suresh
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Trivandrum, India.,Academy of Scientific & Innovative Research (AcSIR), CSIR-NIIST Campus, Trivandrum, India
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Akbar R, Baral M, Kanungo BK. Synthesis, thermodynamic, photophysical and DFT studies of some trivalent metal chelates of a hexadentate tripodal hydroxyquinolinate-based ligand. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1430362] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Rifat Akbar
- Department of Chemistry, Sant Longowal Institute of Engineering & Technology, Longowal, India
| | - Minati Baral
- Department of Chemistry, National Institute of Technology Kurukshetra, Haryana, India
| | - B. K. Kanungo
- Department of Chemistry, Sant Longowal Institute of Engineering & Technology, Longowal, India
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Rao JL, Bhanuprakash K. Push-pull effect on the geometrical, optical and charge transfer properties of disubstituted derivatives of mer-tris(4-hydroxy-1,5-naphthyridinato) aluminum (mer-AlND3). OPEN CHEM 2016. [DOI: 10.1515/chem-2016-0001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractTo design innovative and novel optical materials with high mobility, two kinds of disubstituted derivatives for mer-tris(4-hydroxy-1,5-naphthyridinato) aluminum (mer-AlND3) with push (EDG)–pull (EWG) substituents have been designed. The structures of mer-tris(8-EDG-2-EWG-4-hydroxy-1,5-naphthyridinato) aluminum (type I) and mer-tris(8-EWG-2-EDG-4-hydroxy-1,5-naphthyridinato) aluminum (type II) in the ground and first excited states have been optimized at the B3LYP/6-31G(D) and CIS/6-31G(D) level of theory, respectively. It can be seen from frontier molecular orbitals analysis, in all these complexes, the highest occupied molecular orbital (HOMO) is localized on the pyridine-4-ol ring of A-ligand while lowest unoccupied molecular orbital (LUMO) is on the pyridyl ring of B-ligand in ground state irrespective of electron donor/acceptor substitution present on the ligands similar to that of mer-tris(8-hydroxyquinoline) aluminum (mer-Alq3) and parent mer-AlND3.The absorption and emission wavelengths have been evaluated at the TD-PBE0/6-31G(D) level and it can be see that all the type I derivatives show blue shift while most of the type II derivatives show red shift compared to mer-AlND3. All the disubstituted complexes have showed hypsochromic shifts in both the absorption and emission spectra when compared with the calculated absorption and emission spectra respectively of mer-Alq3. It can be seen that the reorganization energies of some of the disubstituted derivatives are comparable with mer-Alq3 and these derivatives might be good candidates for emitting materials in OLED.
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Affiliation(s)
- Joshi Laxmikanth Rao
- 1I & PC Division, CSIR-Indian Institute of Chemical Technology Hyderabad-500 007, Telangana, India
| | - Kotamarthi Bhanuprakash
- 2I & PC Division, CSIR-Indian Institute of Chemical Technology Hyderabad-500 007, Telangana, India
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Amraoui NE, Hammoutène D. DFT study and topological analysis of the bonding in DNA Hoogsteen-type base pairs. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2015. [DOI: 10.1142/s0219633615500479] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The purpose of our work is to characterize and present a theoretical comparative study of a variety of compounds based on DNA base pairs linked with some transition metal ions in gas phase: C–M–G (Cytosine–metal–Guanine) where [Formula: see text](I), Zn(II), Cd(II) and A–M–T (Adenine–metal–Thyminate) where [Formula: see text](II), Ru(I), Ni(I), Y(II), Zn(I), Cd(I), Cu(II). Geometry optimization and frequency calculations were carried out at DFT/ZORA/BLYP-D/TZ2P level. M–N and M–O bonds were investigated with the quantum chemical topology (QCT): Quantum theory of atoms in molecules (QTAIM) and electron localization functions (ELF). The hydrogen bonds: N10–H[Formula: see text]O7 for A–M–T complexes and N7–H[Formula: see text]O10 for C–M–T ones were visualized and discussed, QTAIM and ELF prove the existence of O7–H[Formula: see text]N10 hydrogen bond for some A–M–T systems, since the bond critical point (BCP) of N7–H having [Formula: see text], so it has a covalent character confirming the existence of a tautomer process of these complexes. Bonding energy [Formula: see text], Pauli repulsion [Formula: see text], electrostatic [Formula: see text], and orbital [Formula: see text] interactions were represented and compared together. Hirschfeld’s charges showed the existence of charge transfer process in the bridge moieties. It seems that, in contrast to natural base pairs that are stabilized by hydrogen bonding, Hoogsteen-type base pairs are held together by coordinative bond with metal ions.
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Affiliation(s)
- Nour Elyakine Amraoui
- Laboratoire de Thermodynamique et de Modélisation Moléculaire (LTMM), Faculté de Chimie, USTHB BP 32, Elalia 16111 Bab Ezzouar, Alger, Algeria
| | - Dalila Hammoutène
- Laboratoire de Thermodynamique et de Modélisation Moléculaire (LTMM), Faculté de Chimie, USTHB BP 32, Elalia 16111 Bab Ezzouar, Alger, Algeria
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Akbar R, Baral M, Kanungo BK. TAME5OX, abiotic siderophore analogue to enterobactin involving 8-hydroxyquinoline subunits: thermodynamic and photophysical studies. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 142:246-259. [PMID: 25703371 DOI: 10.1016/j.saa.2015.01.104] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Revised: 01/12/2015] [Accepted: 01/30/2015] [Indexed: 06/04/2023]
Abstract
The synthesis, thermodynamic and photophysical properties of trivalent metal complexes of biomimetic nonadentate analogue, 5,5'-(2-(((8-hydroxyquinolin-5-yl)methylamino)methyl)-2-methylpropane-1,3-diyl)bis(azanediyl)bis(methylene)diquinolin-8-ol (TAME5OX), have been described. Combination of absorption and emission spectrophotometry, potentiometry, electrospray mass spectrometry, IR, and theoretical investigation were used to fully characterize metal (Fe(+3), Al(+3) and Cr(+3)) chelates of TAME5OX. In solution, TAME5OX forms protonated complexes [M(H3L)](3+) below pH 3.4, which consecutively deprotonates through one to three-proton processes with rise of pH. The formation constants (Logβ11n) of neutral complexes formed at or above physiological pH, have been determined to be 30.18, 23.27 and 22.02 with pM values of 31.16, 18.07 and 18.12 for Fe(+3), Al(+3) and Cr(+3) ions, respectively, calculated at pH 7.4, indicating TAME5OX is a powerful among synthetic metal chelator. The results clearly demonstrate that the ligand in a tripodal orchestration firmly binds these ions over wide pH range and forms distorted octahedral complexes. The binding and the coordination event could be monitored from absorption and fluorescence spectroscopy. The high thermodynamic stability in water at physiological pH of ferric complex of TAME5OX indicates that these complexes are resistant to hydrolysis and therefore are well suited for the development of device for applications as probes. The ligand displays high sensitive fluorescence enhancement to Al(3+) at pH 7.4, in water. Moreover, TAME5OX can distinguish Al(3+) from Fe(3+) and Cr(3+) via two different sensing mechanisms: photoinduced electron transfer (PET) for Al(3+) and internal charge transfer (ICT) for Fe(3+) and Cr(3+). Density functional theory was employed for optimization and evaluation of vibrational modes, NBO analysis, excitation and emission properties of the different species of metal complexes observed by solution studies.
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Affiliation(s)
- Rifat Akbar
- Department of Chemistry, Sant Longowal Institute of Engineering & Technology, Longowal, Punjab 148106, India
| | - Minati Baral
- Department of Chemistry, National Institute of Technology Kurukshetra, Haryana 136119, India
| | - B K Kanungo
- Department of Chemistry, Sant Longowal Institute of Engineering & Technology, Longowal, Punjab 148106, India.
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Xie W, Wang F, Fan J, Song H, Wu Z, Yuan H, Jiang F, Pang Z, Han S. Self-assembled tubular nanostructures of tris(8-quinolinolato)gallium( iii). RSC Adv 2015. [DOI: 10.1039/c5ra14452c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
We report for the first time the controllable growth of tubular nanostructures at the nanoscale of the broadly applied organic drug material, tris(8-hydroxyquinoline)gallium (Gaq3), by an extremely facile approach.
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Affiliation(s)
- Wanfeng Xie
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- P. R. China
| | - Fenggong Wang
- Materials Science and Engineering Department
- University of Maryland
- College Park
- USA
| | - Jihui Fan
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- P. R. China
| | - Hui Song
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- P. R. China
| | - Zongyong Wu
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- P. R. China
| | - Huimin Yuan
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- P. R. China
| | - Feng Jiang
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- P. R. China
| | - Zhiyong Pang
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- P. R. China
| | - Shenghao Han
- School of Physics
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- P. R. China
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Kim H, Lee YS. Quantum chemical analysis of salen–aluminum complexes for organic light emitting diodes. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.08.104] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Bisti F, Stroppa A, Donarelli M, Anemone G, Perrozzi F, Picozzi S, Ottaviano L. Unravelling the role of the central metal ion in the electronic structure of tris(8-hydroxyquinoline) metal chelates: photoemission spectroscopy and hybrid functional calculations. J Phys Chem A 2012; 116:11548-52. [PMID: 23106099 DOI: 10.1021/jp308303d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The electronic structures of tris(8-hydroxyquinolinato)-erbium(III) (ErQ(3)) and tris(8-hydroxyquinolinato)-aluminum(III) (AlQ(3)) have been studied by means of core level and valence band photoemission spectroscopy with the theoretical support of hybrid Heyd-Scuseria-Ernzerhof density functional theory, to investigate the role played by the central metal atom. A lower binding energy (0.2 eV and 0.3 eV, respectively) of the O 1s and N 1s core levels has been observed for ErQ(3) with respect to AlQ(3). Differences in the valence band spectra, mainly related to the first two peaks next to the highest occupied molecular orbital (HOMO), have been ascribed to an energetic shift (to 0.4 eV lower energies for ErQ(3)) of the σ molecular orbital between the oxygen atoms and the central metal atom. A lower (by 0.5 eV) ionization energy has been measured for the ErQ(3). The interpretation of these results is based on a reduced interaction between the central metal atom and the ligands in ErQ(3), with increased electronic charge around the ligands, due to the higher ionic radius and the lower electronegativity of Er with respect to Al.
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Affiliation(s)
- F Bisti
- Dipartimento di Scienze Fisiche e Chimiche, Università dell'Aquila, Via Vetoio, 67100 L'Aquila, Italy.
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Luminescent dinuclear rhenium(I) complexes containing bridging 1,2-diazine ligands: Photophysical properties and application. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.03.006] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Structure and electronic properties of Alq3 derivatives with electron acceptor/donor groups at the C4 positions of the quinolate ligands: a theoretical study. J Mol Model 2011; 17:3039-46. [DOI: 10.1007/s00894-011-1014-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2010] [Accepted: 02/08/2011] [Indexed: 10/18/2022]
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Laxmikanth Rao J, Bhanuprakash K. Structure and electronic properties of tris(4-hydroxy-1,5-naphthyridinato) aluminum (AlND3) and its methyl derivatives: a theoretical study. Theor Chem Acc 2011. [DOI: 10.1007/s00214-011-0908-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Muhammad FF, Abdul Hapip AI, Sulaiman K. Study of optoelectronic energy bands and molecular energy levels of tris (8-hydroxyquinolinate) gallium and aluminum organometallic materials from their spectroscopic and electrochemical analysis. J Organomet Chem 2010. [DOI: 10.1016/j.jorganchem.2010.07.026] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Irfan A, Cui R, Zhang J, Nadeem M. Designing of Disubstituted Derivatives of mer-Alq3: Quantum Theoretical Study. Aust J Chem 2010. [DOI: 10.1071/ch09491] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Different disubstituted derivatives of tris(8-hydroxyquinolinato)aluminium (mer-Alq3) have been designed. An electron donating group (–CH3) has been substituted at position 4; along with electron withdrawing groups (–Cl, –CN, and –F) at position 5 (i.e. tris(4-X-5-Y-8-hydroxyquinolinato)aluminium), as well as the molecules arising from reversion of these substitutions. The designed systems have been optimized at the B3LYP/6–31G* and TD-B3LYP/6–31G* level of theories, in the ground and excited states, respectively. The absorption and emission spectra have been calculated at the TD-B3LYP/6–31G* level. A significant blue shift has been observed for tris(4-methyl-5-cyano-8-hydroxyquinolinato)aluminium (2), and red shifts for each of tris(4-methyl-5-fluoro-8-hydroxyquinolinato)aluminium (3), tris(4-chloro-5-methyl-8-hydroxyquinolinato)aluminium (4), and tris(4-cyano-5-methyl-8-hydroxyquinolinato)aluminium (5). The reorganization energy in solvent best elucidates the charge transport behaviour (p- or n-type), rather than the equivalent gas phase for mer-Alq3 and its derivatives. The reorganization energies indicate that these new derivatives have better or comparable mobility when compared to the parent molecule. The electrostatic surface potential study suggested that photostability would be enhanced. On the basis of energy decomposition analysis, we have explained the distribution pattern of frontier molecular orbitals.
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Jin R, Zhang J, Hao L. Theoretical study of the excited-state intramolecular proton transfer and rotamerism in 2,5-bis(2-hydroxyphenyl)-1,3,4-oxadiazole. Theor Chem Acc 2009. [DOI: 10.1007/s00214-009-0694-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Hernández I, Gillin WP. Influence of High Hydrostatic Pressure on Alq3, Gaq3, and Inq3 (q = 8-Hydroxyquinoline). J Phys Chem B 2009; 113:14079-86. [DOI: 10.1021/jp905108x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ignacio Hernández
- Queen Mary University of London, Centre for Materials Research, Department of Physics, Mile End Road, London E1 4NS, United Kingdom
| | - William P. Gillin
- Queen Mary University of London, Centre for Materials Research, Department of Physics, Mile End Road, London E1 4NS, United Kingdom
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Jin R, Zhang J. Substituent effects in the tuning of excited-state intramolecular proton transfer and optical properties of the derivatives of 2-(2-hydroxyphenyl)-5-phenyl-1,3,4-oxadiazole. Theor Chem Acc 2009. [DOI: 10.1007/s00214-009-0613-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Irfan A, Cui R, Zhang J. Energy decomposition analysis of methyl derivatives of the meridianal isomer of tris(8-hydroxyquinolino)aluminum (mer-Alq3). Chem Phys 2009. [DOI: 10.1016/j.chemphys.2008.12.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Fluorinated derivatives of mer-Alq3: energy decomposition analysis, optical properties, and charge transfer study. Theor Chem Acc 2009. [DOI: 10.1007/s00214-009-0506-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Yang B, Kim SK, Xu H, Park YI, Zhang H, Gu C, Shen F, Wang C, Liu D, Liu X, Hanif M, Tang S, Li W, Li F, Shen J, Park JW, Ma Y. The Origin of the Improved Efficiency and Stability of Triphenylamine-Substituted Anthracene Derivatives for OLEDs: A Theoretical Investigation. Chemphyschem 2008; 9:2601-9. [DOI: 10.1002/cphc.200800513] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Mauro M, Panigati M, Donghi D, Mercandelli P, Mussini P, Sironi A, D’Alfonso G. Tricarbonyl Rhenium(I) Complexes Containing a Bridging 2,5-Diphenyl-1,3,4-oxadiazole Ligand: Structural, Spectroscopic, Electrochemical, and Computational Characterization. Inorg Chem 2008; 47:11154-65. [DOI: 10.1021/ic801447z] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matteo Mauro
- Dipartimento di Chimica Inorganica, Metallorganica e Analitica (DCIMA) “L. Malatesta”, Università di Milano and INSTM, UdR di Milano, via Venezian 21, 20133 Milano, Italy, Dipartimento di Chimica Strutturale e Stereochimica Inorganica (DCSSI), Università di Milano and INSTM, UdR di Milano, via Venezian 21, 20133 Milano, Italy, Dipartimento di Chimica Fisica ed Elettrochimica (DCFE), Università di Milano and INSTM, UdR di Milano, via Golgi 19, 20133 Milano, Italy, Centro di Eccellenza CIMaINa
| | - Monica Panigati
- Dipartimento di Chimica Inorganica, Metallorganica e Analitica (DCIMA) “L. Malatesta”, Università di Milano and INSTM, UdR di Milano, via Venezian 21, 20133 Milano, Italy, Dipartimento di Chimica Strutturale e Stereochimica Inorganica (DCSSI), Università di Milano and INSTM, UdR di Milano, via Venezian 21, 20133 Milano, Italy, Dipartimento di Chimica Fisica ed Elettrochimica (DCFE), Università di Milano and INSTM, UdR di Milano, via Golgi 19, 20133 Milano, Italy, Centro di Eccellenza CIMaINa
| | - Daniela Donghi
- Dipartimento di Chimica Inorganica, Metallorganica e Analitica (DCIMA) “L. Malatesta”, Università di Milano and INSTM, UdR di Milano, via Venezian 21, 20133 Milano, Italy, Dipartimento di Chimica Strutturale e Stereochimica Inorganica (DCSSI), Università di Milano and INSTM, UdR di Milano, via Venezian 21, 20133 Milano, Italy, Dipartimento di Chimica Fisica ed Elettrochimica (DCFE), Università di Milano and INSTM, UdR di Milano, via Golgi 19, 20133 Milano, Italy, Centro di Eccellenza CIMaINa
| | - Pierluigi Mercandelli
- Dipartimento di Chimica Inorganica, Metallorganica e Analitica (DCIMA) “L. Malatesta”, Università di Milano and INSTM, UdR di Milano, via Venezian 21, 20133 Milano, Italy, Dipartimento di Chimica Strutturale e Stereochimica Inorganica (DCSSI), Università di Milano and INSTM, UdR di Milano, via Venezian 21, 20133 Milano, Italy, Dipartimento di Chimica Fisica ed Elettrochimica (DCFE), Università di Milano and INSTM, UdR di Milano, via Golgi 19, 20133 Milano, Italy, Centro di Eccellenza CIMaINa
| | - Patrizia Mussini
- Dipartimento di Chimica Inorganica, Metallorganica e Analitica (DCIMA) “L. Malatesta”, Università di Milano and INSTM, UdR di Milano, via Venezian 21, 20133 Milano, Italy, Dipartimento di Chimica Strutturale e Stereochimica Inorganica (DCSSI), Università di Milano and INSTM, UdR di Milano, via Venezian 21, 20133 Milano, Italy, Dipartimento di Chimica Fisica ed Elettrochimica (DCFE), Università di Milano and INSTM, UdR di Milano, via Golgi 19, 20133 Milano, Italy, Centro di Eccellenza CIMaINa
| | - Angelo Sironi
- Dipartimento di Chimica Inorganica, Metallorganica e Analitica (DCIMA) “L. Malatesta”, Università di Milano and INSTM, UdR di Milano, via Venezian 21, 20133 Milano, Italy, Dipartimento di Chimica Strutturale e Stereochimica Inorganica (DCSSI), Università di Milano and INSTM, UdR di Milano, via Venezian 21, 20133 Milano, Italy, Dipartimento di Chimica Fisica ed Elettrochimica (DCFE), Università di Milano and INSTM, UdR di Milano, via Golgi 19, 20133 Milano, Italy, Centro di Eccellenza CIMaINa
| | - Giuseppe D’Alfonso
- Dipartimento di Chimica Inorganica, Metallorganica e Analitica (DCIMA) “L. Malatesta”, Università di Milano and INSTM, UdR di Milano, via Venezian 21, 20133 Milano, Italy, Dipartimento di Chimica Strutturale e Stereochimica Inorganica (DCSSI), Università di Milano and INSTM, UdR di Milano, via Venezian 21, 20133 Milano, Italy, Dipartimento di Chimica Fisica ed Elettrochimica (DCFE), Università di Milano and INSTM, UdR di Milano, via Golgi 19, 20133 Milano, Italy, Centro di Eccellenza CIMaINa
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22
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Seitz M, Moore EG, Raymond KN. Highly Fluorescent Group 13 Metal Complexes With Cyclic, Aromatic Hydroxamic Acid Ligands. Inorg Chem 2008; 47:8665-73. [DOI: 10.1021/ic800269w] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Michael Seitz
- Department of Chemistry, University of California, Berkeley, California 94720-1460
| | - Evan G. Moore
- Department of Chemistry, University of California, Berkeley, California 94720-1460
| | - Kenneth N. Raymond
- Department of Chemistry, University of California, Berkeley, California 94720-1460
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23
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Donghi D, D’Alfonso G, Mauro M, Panigati M, Mercandelli P, Sironi A, Mussini P, D’Alfonso L. A New Class of Luminescent Tricarbonyl Rhenium(I) Complexes Containing Bridging 1,2-Diazine Ligands: Electrochemical, Photophysical, and Computational Characterization. Inorg Chem 2008; 47:4243-55. [DOI: 10.1021/ic7023692] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Daniela Donghi
- Dipartimento di Chimica Inorganica, Metallorganica e Analitica (DCIMA), Università di Milano, via Venezian 21, I-20133 Milano, Italy, Dipartimento di Chimica Strutturale e Stereochimica Inorganica (DCSSI), Università di Milano, via Venezian 21, I-20133 Milano, Italy, Dipartimento di Chimica Fisica ed Elettrochimica (DCFE), Università di Milano, via Golgi 19, I-20133 Milano, Italy, Dipartimento di Fisica, Università di Milano-Bicocca, piazza della Scienza 6, I-20126 Milano, Italy, Centro di Eccellenza
| | - Giuseppe D’Alfonso
- Dipartimento di Chimica Inorganica, Metallorganica e Analitica (DCIMA), Università di Milano, via Venezian 21, I-20133 Milano, Italy, Dipartimento di Chimica Strutturale e Stereochimica Inorganica (DCSSI), Università di Milano, via Venezian 21, I-20133 Milano, Italy, Dipartimento di Chimica Fisica ed Elettrochimica (DCFE), Università di Milano, via Golgi 19, I-20133 Milano, Italy, Dipartimento di Fisica, Università di Milano-Bicocca, piazza della Scienza 6, I-20126 Milano, Italy, Centro di Eccellenza
| | - Matteo Mauro
- Dipartimento di Chimica Inorganica, Metallorganica e Analitica (DCIMA), Università di Milano, via Venezian 21, I-20133 Milano, Italy, Dipartimento di Chimica Strutturale e Stereochimica Inorganica (DCSSI), Università di Milano, via Venezian 21, I-20133 Milano, Italy, Dipartimento di Chimica Fisica ed Elettrochimica (DCFE), Università di Milano, via Golgi 19, I-20133 Milano, Italy, Dipartimento di Fisica, Università di Milano-Bicocca, piazza della Scienza 6, I-20126 Milano, Italy, Centro di Eccellenza
| | - Monica Panigati
- Dipartimento di Chimica Inorganica, Metallorganica e Analitica (DCIMA), Università di Milano, via Venezian 21, I-20133 Milano, Italy, Dipartimento di Chimica Strutturale e Stereochimica Inorganica (DCSSI), Università di Milano, via Venezian 21, I-20133 Milano, Italy, Dipartimento di Chimica Fisica ed Elettrochimica (DCFE), Università di Milano, via Golgi 19, I-20133 Milano, Italy, Dipartimento di Fisica, Università di Milano-Bicocca, piazza della Scienza 6, I-20126 Milano, Italy, Centro di Eccellenza
| | - Pierluigi Mercandelli
- Dipartimento di Chimica Inorganica, Metallorganica e Analitica (DCIMA), Università di Milano, via Venezian 21, I-20133 Milano, Italy, Dipartimento di Chimica Strutturale e Stereochimica Inorganica (DCSSI), Università di Milano, via Venezian 21, I-20133 Milano, Italy, Dipartimento di Chimica Fisica ed Elettrochimica (DCFE), Università di Milano, via Golgi 19, I-20133 Milano, Italy, Dipartimento di Fisica, Università di Milano-Bicocca, piazza della Scienza 6, I-20126 Milano, Italy, Centro di Eccellenza
| | - Angelo Sironi
- Dipartimento di Chimica Inorganica, Metallorganica e Analitica (DCIMA), Università di Milano, via Venezian 21, I-20133 Milano, Italy, Dipartimento di Chimica Strutturale e Stereochimica Inorganica (DCSSI), Università di Milano, via Venezian 21, I-20133 Milano, Italy, Dipartimento di Chimica Fisica ed Elettrochimica (DCFE), Università di Milano, via Golgi 19, I-20133 Milano, Italy, Dipartimento di Fisica, Università di Milano-Bicocca, piazza della Scienza 6, I-20126 Milano, Italy, Centro di Eccellenza
| | - Patrizia Mussini
- Dipartimento di Chimica Inorganica, Metallorganica e Analitica (DCIMA), Università di Milano, via Venezian 21, I-20133 Milano, Italy, Dipartimento di Chimica Strutturale e Stereochimica Inorganica (DCSSI), Università di Milano, via Venezian 21, I-20133 Milano, Italy, Dipartimento di Chimica Fisica ed Elettrochimica (DCFE), Università di Milano, via Golgi 19, I-20133 Milano, Italy, Dipartimento di Fisica, Università di Milano-Bicocca, piazza della Scienza 6, I-20126 Milano, Italy, Centro di Eccellenza
| | - Laura D’Alfonso
- Dipartimento di Chimica Inorganica, Metallorganica e Analitica (DCIMA), Università di Milano, via Venezian 21, I-20133 Milano, Italy, Dipartimento di Chimica Strutturale e Stereochimica Inorganica (DCSSI), Università di Milano, via Venezian 21, I-20133 Milano, Italy, Dipartimento di Chimica Fisica ed Elettrochimica (DCFE), Università di Milano, via Golgi 19, I-20133 Milano, Italy, Dipartimento di Fisica, Università di Milano-Bicocca, piazza della Scienza 6, I-20126 Milano, Italy, Centro di Eccellenza
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24
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Irfan A, Cui R, Zhang J. Explaining the HOMO and LUMO distribution on individual ligands in mer-Alq3 and its “CH”/N substituted derivatives. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.theochem.2007.10.029] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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25
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Yang Z, Yang S, Zhang J. Ground- and Excited-State Proton Transfer and Rotamerism in 2-(2-Hydroxyphenyl)-5-phenyl-1,3,4-oxadiazole and Its O/“NH or S”-Substituted Derivatives. J Phys Chem A 2007; 111:6354-60. [PMID: 17583324 DOI: 10.1021/jp068589x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The intramolecular proton-transfer process, rotational process, and optical properties of 2-(2-hydroxyphenyl)-5-phenyl-1,3,4-oxadiazole (HOXD) and its O/"NH"- and O/"S"-substituted derivatives, 2-(2-hydroxyphenyl)-5-phenyl-1,3,4-triazole (HOT) and 2-(2-hydroxyphenyl)-5-phenyl-1,3,4-thiadiazole (HOTD), respectively, have been studied. DFT (B3LYP/6-31+G**) single-point energy calculations were performed using HF- and DFT-optimized geometries in the ground state (S0). TD-B3LYP/6-31+G** calculations using CIS-optimized geometries were carried out to investigate the properties of the first singlet excited state (S1) and first triplet excited state (T1). The computational results revealed that a high-energy barrier inhibits the proton transfer from cis-enol (Ec) to keto (K) form in S0, whereas the proton transfer in S1 can take place through a very-low-energy barrier. The rotation between Ec and trans-enol (Et) can occur in S0 through a low-energy barrier, whereas it is prohibited because of the high-energy barrier in S1 for each of the three molecules. The vertical excitation energies were calculated using the TD-B3LYP/6-31+G** method based on the HF- and CIS-optimized geometries. Absorption and fluorescence wavelengths of HOT show a hypsochromic shift (6-15 nm) relative to HOXD, while those of HOTD show a bathochromic shift (21-29 nm). The phosphorescence wavelength of HOTD shows a significant bathochromic shift relative to that of HOXD.
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Affiliation(s)
- Zhenna Yang
- Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
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26
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Liao ZX, Wang Y, Yang XP, Zhou ZD, Xiao D. Theoretical studies of electronic absorption and emission spectra of Pt(saloph). Chem Phys Lett 2007. [DOI: 10.1016/j.cplett.2007.04.038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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27
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Hu B, Gahungu G, Zhang J. Optical Properties of the Phosphorescent Trinuclear Copper(I) Complexes of Pyrazolates: Insights from Theory. J Phys Chem A 2007; 111:4965-73. [PMID: 17511429 DOI: 10.1021/jp0689215] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Theoretical investigations have been performed to explore the optical properties of {[3,5-(CF3)(2)Pz]Cu}3 in monomeric and dimeric forms using TD-DFT approaches. The emission of all complexes originates from the lowest triplet excited-states (T1), and the corresponding emissive states are assigned as the mixture of the metal-centered charge transfer and ligand-to-metal charge transfer. The features of the emission spectrum are clarified in detail. The bulk emission spectrum of complex is mainly determined by the stacked dimers rather than the individual monomers. The predicted maximum emission wavelength (lambda(em)) are in good agreement with experimental values, indicating that the phosphorescence bands can be assigned to two different conformations for the neighboring stacked dimers sharing the same monomer in the complex. Energy transfer from T1 of one stacked dimer to the neighboring one is responsible for the disappearance of the shoulder, leaving only the main peak upon heating. With the aim to reveal the conformational dependence for the triplet excited-state emission spectrum, the optical properties of various stacked dimers with different conformations are investigated by varying the relative arrangements through changing inter-monomer distance or rotational angles for the dimer which is responsible for the main peak emission. Calculation results suggest that the shortest intermolecular Cu...Cu distance plays an important role in the emission spectra of the vertical- and tilting-movement dimers, which is ascribed to the variation of the energy gap for the frontier molecular orbitals involved in the main emitting transition. The blue shift of lambda(em) in parallel-movement and rotational dimers can be traced back to the variation of the mutual spatial orientation. Therefore, the modulation of the extent of movement or rotational angles for stacked dimers by external perturbations creates new possibilities for the design of molecular light-emitting devices.
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Affiliation(s)
- Bo Hu
- Faculty of Chemistry, Northeast Normal University, Changchun 130024, China
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28
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Yang G, Su T, Shi S, Su Z, Zhang H, Wang Y. Theoretical Study on Photophysical Properties of Phenolpyridyl Boron Complexes. J Phys Chem A 2007; 111:2739-44. [PMID: 17388374 DOI: 10.1021/jp067685v] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Organoboron complexes have potential application in organic light-emitting devices (OLEDs). Our group has synthesized four phenolpyridyl boron complexes (Inorg. Chem. 2006, 45, 2788), which can function as an electron transport materials (ETM), white and blue emitters, and exhibit high efficiency and stability. To reveal the relationship between the properties and structures of these functional materials, theoretical analysis of spectral properties and electronic structures of these complexes was systematically characterized with the B3LYP and 6-31G* basis set. The calculated absorption and emission spectra of these systems are in good agreement with the experimental ones. It is clear seen that these transitions are charge transferred along 2,6-bis(2-hydroxyphenyl)pyridyl boron moiety, and the contribution of boron atom in these compounds to the main transition orbitals is vanishingly small. The substitution of methyl and methoxyl for hydrogen does not change the absorption wavelengths and transition natures, but influences the radioactive efficiencies and electron transport properties, which are observed and discussed in detail. Furthermore, large red shifts of fluorescence are caused by replacing the hydrogen with CN or NO2 groups, which indicates that they are potential candidates as green-light-emitting materials. These results are favorable to further understanding the photophysical properties of this kind of complexes.
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Affiliation(s)
- Guochun Yang
- Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, Jilin, People's Republic of China
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29
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Gahungu G, Zhang J. Molecular geometry, electronic structure and optical properties study of meridianal tris(8-hydroxyquinolinato)gallium(III) with ab initio and DFT methods. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.theochem.2005.06.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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