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Lu JJ, Liang X, Luo XF, Wu ZG, Zheng YX. Efficient blue, green and red iridium( iii) complexes with noncovalently-linked pyrazole/pyrazolide rings for organic light-emitting diodes. NEW J CHEM 2020. [DOI: 10.1039/c9nj05218f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Blue, green and red iridium(iii) complexes using a new pyrazole/pyrazolide ancillary ligand system, and their application in OLEDs with EQEs of up to 21.0% and low efficiency roll-off.
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Affiliation(s)
- Jun-Jian Lu
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - Xiao Liang
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - Xu-Feng Luo
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - Zheng-Guang Wu
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
| | - You-Xuan Zheng
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
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2
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Cai W, Zhang H, Yan X, Zhao A, He R, Li M, Meng Q, Shen W. What accounts for the color purity of tetradentate Pt complexes? A computational analysis. Phys Chem Chem Phys 2019; 21:8073-8080. [PMID: 30932122 DOI: 10.1039/c9cp00819e] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In order to improve the texture of human visual perception and broaden the range of certain optical applications, many phosphorescent complexes exhibiting narrow emission spectra have been prepared through reasonable molecular design. For example, by adding a particular group such as tert-butyl (tbu) to a suitable position of PtON1 and PtON7, the peak width of a relevant vibronic band caused by the specific vibrational normal modes could be dramatically restrained in the emission spectra at room temperature. For the purpose of finding an effective approach to replace the trial-and-error manner, the microscopic mechanism of such high color purity was elucidated by computational investigation. In this study, we aim to identify the reason that causes sharp emission associated with the relevant vibrational normal modes. Here, these modes can be labeled to the emission peak by the vibrationally resolved emission spectra. Based on the displacement vectors of relevant normal modes and the vibrationally resolved spectra, the most possible reason for the higher color purity is that tbu in a specific location can restrain the structural deformation between the first triplet excited state (T1) and the ground state (S0). That is to say, the relevant Huang-Rhys factor (Sk) of specific vibrational modes would be decreased. For these compounds, the total bandwidth and the height of the intermediate and high-frequency regions which are in direct proportion to Sk would be decreased to obtain the higher color purity by tbu in a particular position. What is more, the best position for tbu in order to suppress the structural deformation was also considered. In the meantime, radiative (kr) and nonradiative (knr) decay rates of T1 were investigated to seek the effective phosphorescent complexes.
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Affiliation(s)
- Wanlin Cai
- Key Laboratory of Luminescence and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
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3
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Over the LEC rainbow: Colour and stability tuning of cyclometallated iridium(III) complexes in light-emitting electrochemical cells. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.06.016] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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4
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Brémond É, Savarese M, Pérez-Jiménez ÁJ, Sancho-García JC, Adamo C. Speed-Up of the Excited-State Benchmarking: Double-Hybrid Density Functionals as Test Cases. J Chem Theory Comput 2017; 13:5539-5551. [DOI: 10.1021/acs.jctc.7b00627] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Éric Brémond
- CompuNet, Istituto
Italiano di Tecnologia, via Morego
30, I-16163 Genoa, Italy
| | - Marika Savarese
- CompuNet, Istituto
Italiano di Tecnologia, via Morego
30, I-16163 Genoa, Italy
| | | | | | - Carlo Adamo
- Chimie
ParisTech, PSL Research University, CNRS, Institut de Recherche de Chimie Paris IRCP, F-75005 Paris, France
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5
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Yang P, Shen W, Li M, He R. Exploring the effect of vibronic contributions on light harvesting efficiency of NKX-2587 derivatives through vibrationally resolved electronic spectra. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 171:406-414. [PMID: 27569774 DOI: 10.1016/j.saa.2016.08.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 08/07/2016] [Accepted: 08/13/2016] [Indexed: 06/06/2023]
Abstract
The vibrationally resolved electronic spectra of five metal-free NKX-2587 derivatives containing heteroatom with different atomic sizes and electronegativity, were simulated within the Franck-Condon approximation including the Herzberg-Teller and Duschinsky effects, aimed at exploring the correlation of vibronic structure associated with the spectrum and efficiency of dye sensitized solar cells (DSSCs). The parameters of short-circuit current density (Jsc) and open circuit voltage (Voc) involving efficiency of DSSCs, such as total dipole moments (μnormal), the light harvesting efficiency (LHE), injection driving force (∆Ginject), and the number of electrons in the conduction band (nc), were calculated and discussed in detail. Results showed that the heteroatoms in the same period with large size and weak electronegativity and the ones in the same main group with large size and weak electronegativity are beneficial to Voc. The sizes and electronegativity of the heteroatoms have a weak effect on Jsc. The low-frequency modes play important roles in enhancing the intensities of the electronic spectra and structures can affect light harvesting efficiency (LHE). In this sense, our results provided guidance for understanding the sources of spectral intensities of dye molecules, and a valuable help for rational design of new molecules to improve the energy conversion efficiency (η) of DSSCs.
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Affiliation(s)
- Pan Yang
- Key Laboratory of Luminescence and Real-time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Wei Shen
- Key Laboratory of Luminescence and Real-time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Ming Li
- Key Laboratory of Luminescence and Real-time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Rongxing He
- Key Laboratory of Luminescence and Real-time Analytical Chemistry, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
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Santoro F, Jacquemin D. Going beyond the vertical approximation with time-dependent density functional theory. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2016. [DOI: 10.1002/wcms.1260] [Citation(s) in RCA: 121] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Fabrizio Santoro
- CNR-Consiglio Nazionale delle Ricerche; Istituto di Chimica dei Composti OrganoMetallici (ICCOM-CNR); Pisa Italy
| | - Denis Jacquemin
- CEISAM, UMR CNRS 6230; Université de Nantes; Nantes France
- Institut Universitaire de France; Paris France
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Jäger M, Freitag L, González L. Using computational chemistry to design Ru photosensitizers with directional charge transfer. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2015.03.019] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Cerezo J, Avila Ferrer FJ, Santoro F. Disentangling vibronic and solvent broadening effects in the absorption spectra of coumarin derivatives for dye sensitized solar cells. Phys Chem Chem Phys 2015; 17:11401-11. [DOI: 10.1039/c5cp00370a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Individuation of vibronic and solvent contributions to the spectra of a family of coumarin dyes helps to understand the main differences in their lineshapes.
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Affiliation(s)
- Javier Cerezo
- CNR–Consiglio Nazionale delle Ricerche
- Istituto di Chimica dei Composti Organo Metallici (ICCOM-CNR)
- UOS di Pisa
- Area della Ricerca
- I-56124 Pisa
| | - Francisco J. Avila Ferrer
- CNR–Consiglio Nazionale delle Ricerche
- Istituto di Chimica dei Composti Organo Metallici (ICCOM-CNR)
- UOS di Pisa
- Area della Ricerca
- I-56124 Pisa
| | - Fabrizio Santoro
- CNR–Consiglio Nazionale delle Ricerche
- Istituto di Chimica dei Composti Organo Metallici (ICCOM-CNR)
- UOS di Pisa
- Area della Ricerca
- I-56124 Pisa
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Baranoff E, Curchod BFE. FIrpic: archetypal blue phosphorescent emitter for electroluminescence. Dalton Trans 2015; 44:8318-29. [DOI: 10.1039/c4dt02991g] [Citation(s) in RCA: 149] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
FIrpic is the most investigated bis-cyclometallated iridium complex. This Perspective reviews the main experimental and theoretical aspects of FIrpic as well as its use as sky-blue emitter for OLED.
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De Mitri N, Monti S, Prampolini G, Barone V. Absorption and Emission Spectra of a Flexible Dye in Solution: a Computational Time-Dependent Approach. J Chem Theory Comput 2013; 9:4507-4516. [PMID: 26504457 PMCID: PMC4618302 DOI: 10.1021/ct4005799] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The spectroscopic properties of the organic chromophore 4-naphthoyloxy-1-methoxy-2,2,6,6-tetramethylpiperidine (NfO-TEMPO-Me) in toluene solution are explored through an integrated computational strategy combining a classical dynamic sampling with a quantum mechanical description within the framework of the time-dependent density functional theory (TDDFT) approach. The atomistic simulations are based on an accurately parametrized force field, specifically designed to represent the conformational behavior of the molecule in its ground and bright excited states, whereas TDDFT calculations are performed through a selected combination of hybrid functionals and basis sets to obtain optical spectra closely matching the experimental findings. Solvent effects, crucial to obtain good accuracy, are taken into account through explicit molecules and polarizable continuum descriptions. Although, in the case of toluene, specific solvation is not fundamental, the detailed conformational sampling in solution has confirmed the importance of a dynamic description of the molecular geometry for a reliable description of the photophysical properties of the dye. The agreement between theoretical and experimental data is established and a robust protocol for the prediction of the optical behaviour of flexible fluorophores in solution is set.
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Affiliation(s)
- Nicola De Mitri
- Scuola Normale Superiore, piazza dei Cavalieri 7, I-56126 Pisa, Italy
| | - Susanna Monti
- Scuola Normale Superiore, piazza dei Cavalieri 7, I-56126 Pisa, Italy ; Istituto di Chimica dei Composti OrganoMetallici (ICCOM-CNR), Area della Ricerca, via G. Moruzzi 1, I-56124 Pisa, Italy
| | - Giacomo Prampolini
- Istituto per i Processi Chimico-Fisici (IPCF-CNR), Area della Ricerca, via G. Moruzzi 1, I-56124 Pisa, Italy
| | - Vincenzo Barone
- Scuola Normale Superiore, piazza dei Cavalieri 7, I-56126 Pisa, Italy
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Padula D, Di Bari L, Santoro F, Gerlach H, Rizzo A. Analysis of the Electronic Circular Dichroism Spectrum of (−)-[9](2,5)Pyridinophane. Chirality 2012; 24:994-1004. [DOI: 10.1002/chir.22087] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Accepted: 05/30/2012] [Indexed: 12/28/2022]
Affiliation(s)
- Daniele Padula
- Dipartimento di Chimica e Chimica Industriale; Università di Pisa; Pisa Italy
| | - Lorenzo Di Bari
- Dipartimento di Chimica e Chimica Industriale; Università di Pisa; Pisa Italy
| | - Fabrizio Santoro
- Consiglio Nazionale delle Ricerche - CNR; Istituto di Chimica dei Composti Organo Metallici (ICCOM-CNR), UOS di Pisa, Area della Ricerca; Pisa Italy
| | - Hans Gerlach
- Department of Chemistry; University of Bayreuth; Bayreuth Germany
| | - Antonio Rizzo
- Consiglio Nazionale delle Ricerche - CNR; Istituto per i Processi Chimico-Fisici (IPCF-CNR); Pisa Italy
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12
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Cysewski P, Jeliński T, Przybyłek M, Shyichuk A. Color prediction from first principle quantum chemistry computations: a case of alizarin dissolved in methanol. NEW J CHEM 2012. [DOI: 10.1039/c2nj40327g] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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A computational approach to the electronic and optical properties of Ru(II) and Ir(III) polypyridyl complexes: Applications to DSC, OLED and NLO. Coord Chem Rev 2011. [DOI: 10.1016/j.ccr.2011.03.008] [Citation(s) in RCA: 151] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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14
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Lin N, Luo Y, Ruud K, Zhao X, Santoro F, Rizzo A. Differences in Two-Photon and One-Photon Absorption Profiles Induced by Vibronic Coupling: The Case of Dioxaborine Heterocyclic Dye. Chemphyschem 2011; 12:3392-403. [DOI: 10.1002/cphc.201100500] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Indexed: 11/08/2022]
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15
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Lobello MG, Fantacci S, Credi A, De Angelis F. pH-Sensitive Bis(2,2′:6′,2"-terpyridine)ruthenium(II) Complexes - A DFT/TDDFT Investigation of Their Spectroscopic Properties. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201001260] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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16
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Niu Y, Peng Q, Deng C, Gao X, Shuai Z. Theory of excited state decays and optical spectra: application to polyatomic molecules. J Phys Chem A 2010; 114:7817-31. [PMID: 20666533 DOI: 10.1021/jp101568f] [Citation(s) in RCA: 263] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
General formalism of absorption and emission spectra, and of radiative and nonradiative decay rates are derived using a thermal vibration correlation function formalism for the transition between two adiabatic electronic states in polyatomic molecules. Displacements, distortions, and Duschinsky rotation of potential energy surfaces are included within the framework of a multidimensional harmonic oscillator model. The Herzberg-Teller (HT) effect is also taken into account. This formalism gives a reliable description of the Q(x) spectral band of free-base porphyrin with weakly electric dipole-allowed transitions. For the strongly dipole-allowed transitions, e.g., S(1) --> S(0) and S(0) --> S(1) of linear polyacenes, anthracene, tetracene, and pentacene, the HT effect is found to enhance the radiative decay rates by approximately 10% compared to those without the HT effect. For nonradiative transition processes, a general formalism is presented to extend the application scope of the internal conversion theory by going beyond the promoting-mode approximation. Numerical calculations for the nonradiative S(1) --> S(0) decay rate of azulene well explain the origin of the violation of Kasha's rule. When coupled with first-principles density functional theory (DFT) calculations, the present approach appears to be an effective tool to obtain a quantitative description and detailed understanding of spectra and photophysical processes in polyatomic molecules.
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Affiliation(s)
- Yingli Niu
- Key Laboratory of Organic Solids, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, 100190 Beijing, People's Republic of China
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Li X, Zhang Q, Tu Y, Ågren H, Tian H. Modulation of iridium(iii) phosphorescence via photochromic ligands: a density functional theory study. Phys Chem Chem Phys 2010; 12:13730-6. [DOI: 10.1039/c0cp00564a] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Angelis FD, Belpassi L, Fantacci S. Spectroscopic properties of cyclometallated iridium complexes by TDDFT. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.theochem.2009.07.025] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Bolink HJ, De Angelis F, Baranoff E, Klein C, Fantacci S, Coronado E, Sessolo M, Kalyanasundaram K, Grätzel M, Nazeeruddin MK. White-light phosphorescence emission from a single molecule: application to OLED. Chem Commun (Camb) 2009:4672-4. [DOI: 10.1039/b908946b] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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