1
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Sun SJ, Menŝík M, Toman P. Spin-polarized currents induced in antiferromagnetic polymer multilayered field-effect transistors. Phys Chem Chem Phys 2024; 26:13261-13270. [PMID: 38635170 DOI: 10.1039/d4cp00089g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
A theoretical construction of an antiferromagnetic polymer multilayered field-effect transistor with polymers stretched between the source and drain contacts was undertaken. The model employed a quantum approach to the on-chain spin-charge distribution, which was self-consistently coupled with the charge distribution controlled by the gate voltage. Contrary to standard field-effect transistors, we found that the current firstly increased superlinearly with the drain voltage, then it achieved the maximum for drain voltages notably lower than the gate voltage, and after that, it decreased with the drain voltage with no saturation. Such effects were coupled with the formation of the current spin-polarization ratio, where the on-chain mobility of respective spin-polarized charges was significantly dependent on the applied drain voltage. These effects arise from competition among the antiferromagnetic coupling, the intra-site spin-dependent Coulomb interaction, and the applied drain and gate voltages, which strongly influence the on-chain spin-charge distribution, varying from an alternating spin configuration to a spin-polarized configuration at both ends of the chain. Substantial control over the magnitude of spin-polarized currents was achieved by manipulating gate and drain voltages, showcasing the feasibility of practical applications in spintronics.
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Affiliation(s)
- Shih-Jye Sun
- Department of Applied Physics, National University of Kaohsiung, Kaohsiung, Taiwan, Republic of China.
- Department of Physics, National Sun Yat-sen University, Kaohsiung, Taiwan, Republic of China
| | - Miroslav Menŝík
- Institute of Macromolecular Chemistry, ASCR, v.v.i., Heyrovského nám. 2, 162 06 Prague, Czech Republic
| | - Petr Toman
- Institute of Macromolecular Chemistry, ASCR, v.v.i., Heyrovského nám. 2, 162 06 Prague, Czech Republic
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2
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Wu Y, Rawlinson J, Littlejohn RG, Subotnik JE. Linear and angular momentum conservation in surface hopping methods. J Chem Phys 2024; 160:024119. [PMID: 38205852 DOI: 10.1063/5.0179599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 11/29/2023] [Indexed: 01/12/2024] Open
Abstract
We demonstrate that, for systems with spin-orbit coupling and an odd number of electrons, the standard fewest switches surface hopping algorithm does not conserve the total linear or angular momentum. This lack of conservation arises not so much from the hopping direction (which is easily adjusted) but more generally from propagating adiabatic dynamics along surfaces that are not time reversible. We show that one solution to this problem is to run along eigenvalues of phase-space electronic Hamiltonians H(R, P) (i.e., electronic Hamiltonians that depend on both nuclear position and momentum) with an electronic-nuclear coupling Γ · P [see Eq. (25)], and we delineate the conditions that must be satisfied by the operator Γ. The present results should be extremely useful as far as developing new semiclassical approaches that can treat systems where the nuclear, electronic orbital, and electronic spin degrees of freedom altogether are all coupled together, hopefully including systems displaying the chiral-induced spin selectivity effect.
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Affiliation(s)
- Yanze Wu
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Jonathan Rawlinson
- Department of Mathematics, University of Manchester, Manchester M13 9PL, United Kingdom
| | - Robert G Littlejohn
- Department of Physics, University of California, Berkeley, California 94720, USA
| | - Joseph E Subotnik
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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3
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He R, Domingues RA, Valandro S, Schanze KS. Platinum Poly-yne Featuring N-Heterocyclic Carbene Ligands: Synthesis, Properties, and Organic Light-Emitting Diode Application. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01344] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ru He
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Raquel A. Domingues
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
- Institute of Science and Technology, Federal University of São Paulo, R. Talim, 330, São José dos Campos, São Paulo 12231-280, Brazil
| | - Silvano Valandro
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Kirk S. Schanze
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
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4
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Sifain AE, Lystrom L, Messerly RA, Smith JS, Nebgen B, Barros K, Tretiak S, Lubbers N, Gifford BJ. Predicting phosphorescence energies and inferring wavefunction localization with machine learning. Chem Sci 2021; 12:10207-10217. [PMID: 34447529 PMCID: PMC8336587 DOI: 10.1039/d1sc02136b] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 06/28/2021] [Indexed: 11/29/2022] Open
Abstract
Phosphorescence is commonly utilized for applications including light-emitting diodes and photovoltaics. Machine learning (ML) approaches trained on ab initio datasets of singlet-triplet energy gaps may expedite the discovery of phosphorescent compounds with the desired emission energies. However, we show that standard ML approaches for modeling potential energy surfaces inaccurately predict singlet-triplet energy gaps due to the failure to account for spatial localities of spin transitions. To solve this, we introduce localization layers in a neural network model that weight atomic contributions to the energy gap, thereby allowing the model to isolate the most determinative chemical environments. Trained on the singlet-triplet energy gaps of organic molecules, we apply our method to an out-of-sample test set of large phosphorescent compounds and demonstrate the substantial improvement that localization layers have on predicting their phosphorescence energies. Remarkably, the inferred localization weights have a strong relationship with the ab initio spin density of the singlet-triplet transition, and thus infer localities of the molecule that determine the spin transition, despite the fact that no direct electronic information was provided during training. The use of localization layers is expected to improve the modeling of many localized, non-extensive phenomena and could be implemented in any atom-centered neural network model.
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Affiliation(s)
- Andrew E Sifain
- Theoretical Division, Los Alamos National Laboratory Los Alamos NM USA 87545
- Center for Nonlinear Studies, Los Alamos National Laboratory Los Alamos NM USA 87545
| | - Levi Lystrom
- Theoretical Division, Los Alamos National Laboratory Los Alamos NM USA 87545
- Center for Nonlinear Studies, Los Alamos National Laboratory Los Alamos NM USA 87545
| | - Richard A Messerly
- Theoretical Division, Los Alamos National Laboratory Los Alamos NM USA 87545
| | - Justin S Smith
- Theoretical Division, Los Alamos National Laboratory Los Alamos NM USA 87545
- Center for Nonlinear Studies, Los Alamos National Laboratory Los Alamos NM USA 87545
| | - Benjamin Nebgen
- Theoretical Division, Los Alamos National Laboratory Los Alamos NM USA 87545
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory Los Alamos NM USA 87545
| | - Kipton Barros
- Theoretical Division, Los Alamos National Laboratory Los Alamos NM USA 87545
- Center for Nonlinear Studies, Los Alamos National Laboratory Los Alamos NM USA 87545
| | - Sergei Tretiak
- Theoretical Division, Los Alamos National Laboratory Los Alamos NM USA 87545
- Center for Nonlinear Studies, Los Alamos National Laboratory Los Alamos NM USA 87545
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory Los Alamos NM USA 87545
| | - Nicholas Lubbers
- Computer, Computational, and Statistical Sciences Division, Los Alamos National Laboratory Los Alamos NM USA 87545
| | - Brendan J Gifford
- Theoretical Division, Los Alamos National Laboratory Los Alamos NM USA 87545
- Center for Nonlinear Studies, Los Alamos National Laboratory Los Alamos NM USA 87545
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory Los Alamos NM USA 87545
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5
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Valandro SR, He R, Bullock JD, Arman H, Schanze KS. Ultrafast Excited-State Dynamics in trans-(N-Heterocyclic carbene)platinum(II) Acetylide Complexes. Inorg Chem 2021; 60:10065-10074. [PMID: 33908257 DOI: 10.1021/acs.inorgchem.1c00288] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
This study probes femto- and picosecond excited-state dynamics of a series of N-heterocyclic carbene (NHC) ligand-containing platinum(II) complexes of the type trans-(NHC)2PtII(CC-Ar)2, where CC-Ar is an arylacetylide. By using femtosecond transient absorption spectroscopy, two dynamic processes are observed: an ultrafast singlet → triplet intersystem crossing (<0.3 ps), followed by geometric/electronic relaxation that takes place on a 2-10 ps time scale. The geometric/electronic relaxation is attributed to ligand torsional modes, mainly arising from twisting of the aryl units relative to the square-planar PtL4 unit. The dynamics of this relaxation process depend somewhat on steric constraints induced by substituent groups attached to the (benz)imidazole and phenyl ligands. The geometric relaxation dynamics slow with increasing solvent viscosity. The experimental studies also reveal that the different conformers can be photoselected by varying the excitation at different near-UV wavelengths. To corroborate the experimental findings, density functional theory calculations were conducted to probe the effects of geometry and steric hindrance on the ground-state energy surface. The calculations suggest that the barrier for torsion of the CC-Ar units increases as N-substituents on the NHC ligands increase in the order CH3 < cyclohexyl < n-butyl and as the CC-Ar units are substituted in the 3 and 5 positions with tert-butyl groups.
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Affiliation(s)
- Silvano R Valandro
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249, United States
| | - Ru He
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249, United States.,Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - James D Bullock
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Hadi Arman
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249, United States
| | - Kirk S Schanze
- Department of Chemistry, University of Texas at San Antonio, One UTSA Circle, San Antonio, Texas 78249, United States
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6
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Bian X, Wu Y, Teh HH, Zhou Z, Chen HT, Subotnik JE. Modeling nonadiabatic dynamics with degenerate electronic states, intersystem crossing, and spin separation: A key goal for chemical physics. J Chem Phys 2021; 154:110901. [DOI: 10.1063/5.0039371] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Affiliation(s)
- Xuezhi Bian
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Yanze Wu
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Hung-Hsuan Teh
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Zeyu Zhou
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Hsing-Ta Chen
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Joseph E. Subotnik
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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7
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Mihaly JJ, Phillips AT, Malloy JT, Marsh ZM, Zeller M, Haley JE, de La Harpe K, Grusenmeyer TA, Gray TG. Synthesis and Photophysical Properties of Laterally Asymmetric Digold(I) Alkynyls and Triazolyl: Ancillary Ligand and Organic Functionality Dictate Excited-State Dynamics. Organometallics 2020. [DOI: 10.1021/acs.organomet.9b00768] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Joseph J. Mihaly
- Department of Chemistry, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
| | - Alexis T. Phillips
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Dayton, Ohio 45433, United States
- Southwestern Ohio Council for Higher Education, Dayton, Ohio 45420, United States
| | - Jacob T. Malloy
- Department of Physics, United States Air Force Academy, U.S. Air Force Academy, Colorado 80840, United States
| | - Zachary M. Marsh
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Dayton, Ohio 45433, United States
- Azimuth Corporation, 4027 Colonel Glenn Highway, Suite 230, Beavercreek, Ohio 45431, United States
| | - Matthias Zeller
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Joy E. Haley
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Dayton, Ohio 45433, United States
| | - Kimberly de La Harpe
- Department of Physics, United States Air Force Academy, U.S. Air Force Academy, Colorado 80840, United States
| | - Tod A. Grusenmeyer
- Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson Air Force Base, Dayton, Ohio 45433, United States
| | - Thomas G. Gray
- Department of Chemistry, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
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8
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Leveillee J, Katan C, Even J, Ghosh D, Nie W, Mohite AD, Tretiak S, Schleife A, Neukirch AJ. Tuning Electronic Structure in Layered Hybrid Perovskites with Organic Spacer Substitution. NANO LETTERS 2019; 19:8732-8740. [PMID: 31675242 DOI: 10.1021/acs.nanolett.9b03427] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Two-dimensional layered halide organic perovskites (LHOPs) are promising candidates for many optoelectronic applications due to their interesting tunable properties. They provide a unique opportunity to control energy and charge dynamics via the independent tunability of the energy levels within the perovskite and the organic spacer for various optoelectronic applications. In the perovskite layer alone, one can replace the Pb (Sn), the halide (X = I, Br, Cl), the organic component, and the number of layers between the organic spacer layers. In addition, there are many possibilities for organic spacer layers between the perovskite layers, making it difficult for experimental methods to comprehensively explore such an extensive combinatorial space. Of particular technological interest is alignment of electronic levels between the perovskite layer and the organic spacer layer, leading to desired transfer of energy or charge carriers between perovskite and organic components. For example, as band edge absorption is almost entirely attributed to the perovskite layer, one way to demonstrate energy transfer is to observe triplet emission from organic spacers. State-of-the-art computational chemistry tools can be used to predict the properties of many stoichiometries in search for LHOPs that have the most promising electronic-structure features. In this first-principles study, we survey a group of π-conjugated organic spacer candidates for use in triplet light-emitting LHOPs. Utilizing density functional theory (DFT) and time-dependent DFT, we calculate the first singlet (S1) and triplet (T1) excitation energy in the ground-state geometry and the first triplet excitation energy in the excited-triplet-state relaxed geometry (T1*). By comparing these energies to the known lowest exciton energy level of PbnX3n+1 perovskite layers (X = I, Br, Cl), we can identify organic spacer and perovskite layer pairings for possible transfer of Wannier excitons from the inorganic perovskite lattice to spin-triplet Frenkel excitons located on the organic cation. We successfully identify ten organic spacer candidates for possible pairing with perovskite layers of specific halide composition to achieve triplet light emission across the visible energy range. Molecular dynamics simulations predict that finite temperatures and perovskite environment have little influence on the average excitation energies of the two common organic spacers naphthylethylammonium (NEA) and phenelethylammonium (PEA). We find significant thermal broadening up to 0.5 eV of the optical excitation energies appearing due to finite temperature effects. The findings herein provide insights into alignment of electronic levels of the conjugated organic spacer with the layer.
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Affiliation(s)
- Joshua Leveillee
- Department of Materials Science and Engineering , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
- Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
| | - Claudine Katan
- Univ Rennes, ENSCR, INSA Rennes, CNRS , ISCR - UMR 6226 , F-35000 Rennes , France
| | - Jacky Even
- Univ Rennes, INSA Rennes, CNRS , Institut FOTON - UMR 6082, F-35000 Rennes , France
| | - Dibyajyoti Ghosh
- Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
| | - Wanyi Nie
- Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
| | - Aditya D Mohite
- Department of Chemical and Biomolecular Engineering , Rice University , Houston , Texas 77005 , United States
| | - Sergei Tretiak
- Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
| | - André Schleife
- Department of Materials Science and Engineering , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
- Materials Research Laboratory , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
- National Center for Supercomputing Applications , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
| | - Amanda J Neukirch
- Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
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9
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Guo L, Qin Y, Gu X, Zhu X, Zhou Q, Sun X. Spin Transport in Organic Molecules. Front Chem 2019; 7:428. [PMID: 31275920 PMCID: PMC6591472 DOI: 10.3389/fchem.2019.00428] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 05/27/2019] [Indexed: 11/13/2022] Open
Abstract
Because of the considerable advantages of functional molecules as well as supramolecules, such as the low cost, light weight, flexibility, and large area preparation via the solution method, molecular electronics has grown into an active and rapidly developing research field over the past few decades. Beyond those well-known advantages, a very long spin relaxation time of π-conjugated molecules, due to the weak spin-orbit coupling, facilitates a pioneering but fast-growing research field, known as molecular spintronics. Recently, a series of sustained progresses have been achieved with various π-conjugated molecular matrixes where spin transport is undoubtedly an important point for the spin physical process and multifunctional applications. Currently, most studies on spin transport are carried out with a molecule-based spin valve, which shows a typical geometry with a thin-film molecular layer sandwiched between two ferromagnetic electrodes. In such a device, the spin transport process has been demonstrated to have a close correlation with spin relaxation time and charge carrier mobility of π-conjugated molecules. In this review, the recent advances of spin transport in these two aspects have been systematically summarized. Particularly, spin transport in π-conjugated molecular materials, considered as promising for spintronics development, have also been highlighted, including molecular single crystal, cocrystal, solid solution as well as other highly ordered supramolecular structures.
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Affiliation(s)
- Lidan Guo
- Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, CAS (Chinese Academy of Sciences) Center for Excellence in Nanoscience, Beijing, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China.,Department of Materials Science and Engineering, College of New Energy and Materials, China University of Petroleum Beijing, Beijing, China
| | - Yang Qin
- Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, CAS (Chinese Academy of Sciences) Center for Excellence in Nanoscience, Beijing, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
| | - Xianrong Gu
- Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, CAS (Chinese Academy of Sciences) Center for Excellence in Nanoscience, Beijing, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
| | - Xiangwei Zhu
- Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, CAS (Chinese Academy of Sciences) Center for Excellence in Nanoscience, Beijing, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
| | - Qiong Zhou
- Department of Materials Science and Engineering, College of New Energy and Materials, China University of Petroleum Beijing, Beijing, China
| | - Xiangnan Sun
- Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, CAS (Chinese Academy of Sciences) Center for Excellence in Nanoscience, Beijing, China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, China
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10
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Fonseca RD, Vivas MG, Silva DL, Eucat G, Bretonnière Y, Andraud C, Mendonca CR, De Boni L. Intramolecular Cooperative and Anti-Cooperative Effect on the Two-Photon Absorption Cross Section in Triphenylamine Derivatives. J Phys Chem Lett 2019; 10:2214-2219. [PMID: 30958006 DOI: 10.1021/acs.jpclett.9b00518] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The intramolecular cooperative effect in branched molecules is a consequence of the interaction and extent of electronic coupling among the different axes of charge transfer. Such an effect is the key to obtain remarkable nonlinear optical response in molecular systems. Here we show that triphenylamine derivative molecules containing only two branches present the strongest electronic interaction between them at the excited state, generating exponential enhancement of the 2PA cross section. The primary factor for such behavior was ascribed to the substantial extent and interaction of the π-electron delocalization promoted by the strong electron-donating and acceptor antisymmetrical groups present in each branch. However, for the three-branch molecules we observed an anticooperative effect, i.e., the 2PA cross section decreases as compared to the one-branch structure as we normalized the signal by the effective π-electron number in each molecule.
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Affiliation(s)
- Ruben D Fonseca
- Instituto de Física de São Carlos , Universidade de São Paulo , 13560-970 São Carlos , SP , Brazil
- Departamento de Fisica , Universidad popular del Cesar , Barrio Sabana , 2000004 Valledupar , Cesar , Colombia
| | - Marcelo G Vivas
- Laboratório de Espectroscopia Óptica e Fotônica , Universidade Federal de Alfenas , 37715-400 Poços de Caldas , MG , Brazil
| | - Daniel Luiz Silva
- Departamento de Ciências da Natureza, Matemática e Educação , Universidade Federal de São Carlos , Rod. Anhanguera - Km 174 , 13600-970 Araras , SP , Brazil
| | - Gwenaelle Eucat
- Laboratoire de Chimie , Univ Lyon, Ens de Lyon, CNRS UMR 5182, Université Claude Bernard Lyon 1 , F69342 Lyon , France
| | - Yann Bretonnière
- Laboratoire de Chimie , Univ Lyon, Ens de Lyon, CNRS UMR 5182, Université Claude Bernard Lyon 1 , F69342 Lyon , France
| | - Chantal Andraud
- Laboratoire de Chimie , Univ Lyon, Ens de Lyon, CNRS UMR 5182, Université Claude Bernard Lyon 1 , F69342 Lyon , France
| | - Cleber R Mendonca
- Instituto de Física de São Carlos , Universidade de São Paulo , 13560-970 São Carlos , SP , Brazil
| | - Leonardo De Boni
- Instituto de Física de São Carlos , Universidade de São Paulo , 13560-970 São Carlos , SP , Brazil
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11
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Bellonzi N, Medders GR, Epifanovsky E, Subotnik JE. Configuration interaction singles with spin-orbit coupling: Constructing spin-adiabatic states and their analytical nuclear gradients. J Chem Phys 2019; 150:014106. [PMID: 30621414 DOI: 10.1063/1.5045484] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
For future use in modeling photoexcited dynamics and intersystem crossing, we calculate spin-adiabatic states and their analytical nuclear gradients within configuration interaction singles theory. These energies and forces should be immediately useful for surface hopping dynamics, which are natural within an adiabatic framework. The resulting code has been implemented within the Q-Chem software and preliminary results suggest that the additional cost of including spin-orbit coupling within the singles-singles block is not large.
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Affiliation(s)
- Nicole Bellonzi
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Gregory R Medders
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
| | - Evgeny Epifanovsky
- Q-Chem, Inc., 6601 Owens Drive, Suite 105, Pleasanton, California 94588, USA
| | - Joseph E Subotnik
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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12
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Bellam R, Jaganyi D, Mambanda A, Robinson R, BalaKumaran MD. Seven membered chelate Pt(ii) complexes with 2,3-di(2-pyridyl)quinoxaline ligands: studies of substitution kinetics by sulfur donor nucleophiles, interactions with CT-DNA, BSA and in vitro cytotoxicity activities. RSC Adv 2019; 9:31877-31894. [PMID: 35530785 PMCID: PMC9072748 DOI: 10.1039/c9ra06488e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 09/18/2019] [Indexed: 11/21/2022] Open
Abstract
Dichloro platinum(ii) complexes coordinated with 2,3-di(2-pyridyl)quinoxaline ligands which form seven-membered chelates namely, bpqPtCl2, dmbpqPtCl2 and bbqPtCl2 (where bpq, dmbpq and bbq are 2,3-di(2-pyridyl)quinoxaline, 6,7-dimethyl-2,3-di(2-pyridyl)quinoxaline and 2,3-bis(2′pyriyl)benzo[g]quinoxaline, respectively) were synthesized, characterised and their respective hydrated product complexes namely, bpqPt(OH2)22+, dmbpqPt(OH2)22+ and bbqPt(OH2)22+ were prepared by chloride metathesis. The substitution kinetics of the aquated cations by thiourea nucleophiles indicated that the two aqua ligands are substituted simultaneously according to the rate law: kobs = k2[Nu]. This is followed by a forced dechelation of the ligands from the Pt (II) to form Pt(Nu)42+ species. The dechelation step is considerably slow to be monitored reliably. The rate of substitution is marginally enhanced by introducing two methyl groups and by extending the π-conjugation on the bpq core ligand. The reactivity order increased as bpqPt(OH2)22+ < dmbpqPt(OH2)22+ < bbqPt(OH2)22+. Reactivity trends were well supported by theoretical computed DFT electronic descriptors. The interactions of the Pt(ii) complexes with CT-DNA and BSA were also examined spectroscopically in tris buffers at pH 7.2. Spectroscopic and viscosity measurements suggested strong associative interactions between the Pt(ii) complexes and CT-DNA, most likely through groove binding. In silico theoretical binding studies showed energetically stable poses through associative non-covalent interactions. In vitro MTT cytotoxicity IC50 values of the Pt(ii) complexes on human liver carcinoma cells (HepG2) cancer cell lines revealed bbqPtCl2 as the least active. The fluorescence staining assays revealed the morphological changes suggested early apoptotic induction as well as non-specific necrosis. Dichloro platinum(ii) complexes coordinated with 2,3-di(2-pyridyl)quinoxaline ligands form seven-membered chelates were synthesized, characterised and their respective hydrated product complexes were prepared by chloride metathesis.![]()
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Affiliation(s)
- Rajesh Bellam
- School of Chemistry and Physics
- University of KwaZulu-Natal
- Pietermaritzburg 3209
- South Africa
| | - Deogratius Jaganyi
- School of Science
- College of Science and Technology
- University of Rwanda
- Kigali
- Rwanda
| | - Allen Mambanda
- School of Chemistry and Physics
- University of KwaZulu-Natal
- Pietermaritzburg 3209
- South Africa
| | - Ross Robinson
- School of Chemistry and Physics
- University of KwaZulu-Natal
- Pietermaritzburg 3209
- South Africa
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13
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Haque A, Al-Balushi RA, Al-Busaidi IJ, Khan MS, Raithby PR. Rise of Conjugated Poly-ynes and Poly(Metalla-ynes): From Design Through Synthesis to Structure-Property Relationships and Applications. Chem Rev 2018; 118:8474-8597. [PMID: 30112905 DOI: 10.1021/acs.chemrev.8b00022] [Citation(s) in RCA: 109] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Conjugated poly-ynes and poly(metalla-ynes) constitute an important class of new materials with potential application in various domains of science. The key factors responsible for the diverse usage of these materials is their intriguing and tunable chemical and photophysical properties. This review highlights fascinating advances made in the field of conjugated organic poly-ynes and poly(metalla-ynes) incorporating group 4-11 metals. This includes several important aspects of conjugated poly-ynes viz. synthetic protocols, bonding, electronic structure, nature of luminescence, structure-property relationships, diverse applications, and concluding remarks. Furthermore, we delineated the future directions and challenges in this particular area of research.
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Affiliation(s)
- Ashanul Haque
- Department of Chemistry , Sultan Qaboos University , P.O. Box 36, Al-Khod 123 , Sultanate of Oman
| | - Rayya A Al-Balushi
- Department of Chemistry , Sultan Qaboos University , P.O. Box 36, Al-Khod 123 , Sultanate of Oman
| | - Idris Juma Al-Busaidi
- Department of Chemistry , Sultan Qaboos University , P.O. Box 36, Al-Khod 123 , Sultanate of Oman
| | - Muhammad S Khan
- Department of Chemistry , Sultan Qaboos University , P.O. Box 36, Al-Khod 123 , Sultanate of Oman
| | - Paul R Raithby
- Department of Chemistry , University of Bath , Claverton Down , Bath BA2 7AY , U.K
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14
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Islam SN, Sil A, Patra SK. Achieving yellow emission by varying the donor/acceptor units in rod-shaped fluorenyl-alkynyl based π-conjugated oligomers and their binuclear gold(i) alkynyl complexes. Dalton Trans 2018; 46:5918-5929. [PMID: 28406507 DOI: 10.1039/c7dt00895c] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fluorenyl-alkynyl based π-conjugated rod-shaped oligomers bearing different central aromatic moieties and functionalizable di-alkynyl termini, such as H-[triple bond, length as m-dash]-Fl-[triple bond, length as m-dash]-Fl-[triple bond, length as m-dash]-Fl-[triple bond, length as m-dash]-H (OH1), H-[triple bond, length as m-dash]-Fl-[triple bond, length as m-dash]-Btz-[triple bond, length as m-dash]-Fl-[triple bond, length as m-dash]-H (OH2) and H-[triple bond, length as m-dash]-Fl-[triple bond, length as m-dash]-Btd-[triple bond, length as m-dash]-Fl-[triple bond, length as m-dash]-H (OH3) where Fl = 9,9-dioctylfluorene, Btz = N-hexylbenzotriazole, and Btd = benzothiadiazole, were successfully synthesized by a Pd(0) catalyzed Stille coupling protocol. Electron withdrawing benzothiadiazole and benzotriazole as strong to moderate acceptors and fluorene as the donor have been incorporated to adjust the Donor-Acceptor (D-A) strength for fine-tuning the bandgap (Eg) as well as the emission wavelength. The corresponding digold(i) σ-complexes (PPh3)Au-[triple bond, length as m-dash]-Fl-[triple bond, length as m-dash]-Fl-[triple bond, length as m-dash]-Fl-[triple bond, length as m-dash]-Au(PPh3) (OM1), (PPh3)Au-[triple bond, length as m-dash]-Fl-[triple bond, length as m-dash]-Btz-[triple bond, length as m-dash]-Fl-[triple bond, length as m-dash]-Au(PPh3) (OM2) and (PPh3)Au-[triple bond, length as m-dash]-Fl-[triple bond, length as m-dash]-Btd-[triple bond, length as m-dash]-Fl-[triple bond, length as m-dash]-Au(PPh3) (OM3) have also been prepared by a reaction of Au(PPh3)Cl and methanolic NaOMe in DCM with the corresponding alkynyl functionalized oligomers to take advantage of the heavy-atom effect on their emissive properties. The synthesized rod-shaped π-conjugated fluorene based oligomers and their binuclear Au(i) σ-complexes have been unambiguously characterized by various spectroscopic tools such as FTIR and multinuclear NMR as well as MALDI-TOF and CHN analyses. The absorption and emission spectral studies exhibited a progressive red shift with increasing the electron withdrawing character of the central aromatic unit. The rod-like oligomers having alkynyl termini and the corresponding digold(i) complexes are found to be blue, cyan and yellow emissive, demonstrating the fine-tuning of the emission wavelength. Most importantly, the fluorene based π-conjugated yellow light emitters OH3 and OM3 are successfully achieved by varying the donor/acceptor moiety to the fluorenyl-alkynyl backbone. The digold(i) diacetylide organometallic wires exhibit phosphorescence at 77 K in degassed CH2Cl2 due to the efficient intersystem crossing from the S1 to the T1 excited state as induced by heavy atoms.
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Affiliation(s)
- Sk Najmul Islam
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur-721302, WB, India.
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15
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Wang P, Zhou LF, Jiang SW, Luan ZZ, Shu DJ, Ding HF, Wu D. Unidirectional Spin-Wave-Propagation-Induced Seebeck Voltage in a PEDOT:PSS/YIG Bilayer. PHYSICAL REVIEW LETTERS 2018; 120:047201. [PMID: 29437452 DOI: 10.1103/physrevlett.120.047201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Indexed: 06/08/2023]
Abstract
We clarify the physical origin of the dc voltage generation in a bilayer of a conducting polymer film and a micrometer-thick magnetic insulator Y_{3}Fe_{5}O_{12} (YIG) film under ferromagnetic resonance and/or spin wave excitation conditions. The previous attributed mechanism, the inverse spin Hall effect in the polymer [Nat. Mater. 12, 622 (2013)NMAACR1476-112210.1038/nmat3634], is excluded by two control experiments. We find an in-plane temperature gradient in YIG which has the same angular dependence with the generated voltage. Both vanish when the YIG thickness is reduced to a few nanometers. Thus, we argue that the dc voltage is governed by the Seebeck effect in the polymer, where the temperature gradient is created by the nonreciprocal magnetostatic surface spin wave propagation in YIG.
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Affiliation(s)
- P Wang
- National Laboratory of Solid State Microstructures, Department of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 22 Hankou Road, Nanjing 210093, People's Republic of China
| | - L F Zhou
- National Laboratory of Solid State Microstructures, Department of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 22 Hankou Road, Nanjing 210093, People's Republic of China
| | - S W Jiang
- National Laboratory of Solid State Microstructures, Department of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 22 Hankou Road, Nanjing 210093, People's Republic of China
| | - Z Z Luan
- National Laboratory of Solid State Microstructures, Department of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 22 Hankou Road, Nanjing 210093, People's Republic of China
| | - D J Shu
- National Laboratory of Solid State Microstructures, Department of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 22 Hankou Road, Nanjing 210093, People's Republic of China
| | - H F Ding
- National Laboratory of Solid State Microstructures, Department of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 22 Hankou Road, Nanjing 210093, People's Republic of China
| | - D Wu
- National Laboratory of Solid State Microstructures, Department of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, 22 Hankou Road, Nanjing 210093, People's Republic of China
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16
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Jayapal M, Haque A, Al-Busaidi IJ, Al-Balushi R, Al-Suti MK, Islam SM, Khan MS. Synthesis, characterization and photocell studies of a Pt(II) poly-yne covalently attached to a fullerene. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.05.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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17
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Cao Y, Wolf MO, Patrick BO. Dual-Emissive Platinum(II) Metallacycles with Thiophene-Containing Bisacetylide Ligands. Inorg Chem 2016; 55:8985-93. [DOI: 10.1021/acs.inorgchem.6b01464] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yang Cao
- Department of Chemistry, 2036 Main Mall, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Michael O. Wolf
- Department of Chemistry, 2036 Main Mall, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - Brian O. Patrick
- Department of Chemistry, 2036 Main Mall, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
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18
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Sun D, van Schooten KJ, Kavand M, Malissa H, Zhang C, Groesbeck M, Boehme C, Valy Vardeny Z. Inverse spin Hall effect from pulsed spin current in organic semiconductors with tunable spin-orbit coupling. NATURE MATERIALS 2016; 15:863-869. [PMID: 27088233 DOI: 10.1038/nmat4618] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 03/03/2016] [Indexed: 06/05/2023]
Abstract
Exploration of spin currents in organic semiconductors (OSECs) induced by resonant microwave absorption in ferromagnetic substrates is appealing for potential spintronics applications. Owing to the inherently weak spin-orbit coupling (SOC) of OSECs, their inverse spin Hall effect (ISHE) response is very subtle; limited by the microwave power applicable under continuous-wave (cw) excitation. Here we introduce a novel approach for generating significant ISHE signals in OSECs using pulsed ferromagnetic resonance, where the ISHE is two to three orders of magnitude larger compared to cw excitation. This strong ISHE enables us to investigate a variety of OSECs ranging from π-conjugated polymers with strong SOC that contain intrachain platinum atoms, to weak SOC polymers, to C60 films, where the SOC is predominantly caused by the curvature of the molecule's surface. The pulsed-ISHE technique offers a robust route for efficient injection and detection schemes of spin currents at room temperature, and paves the way for spin orbitronics in plastic materials.
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Affiliation(s)
- Dali Sun
- Department of Physics &Astronomy, University of Utah, Salt Lake City, Utah 84112, USA
| | - Kipp J van Schooten
- Department of Physics &Astronomy, University of Utah, Salt Lake City, Utah 84112, USA
| | - Marzieh Kavand
- Department of Physics &Astronomy, University of Utah, Salt Lake City, Utah 84112, USA
| | - Hans Malissa
- Department of Physics &Astronomy, University of Utah, Salt Lake City, Utah 84112, USA
| | - Chuang Zhang
- Department of Physics &Astronomy, University of Utah, Salt Lake City, Utah 84112, USA
| | - Matthew Groesbeck
- Department of Physics &Astronomy, University of Utah, Salt Lake City, Utah 84112, USA
| | - Christoph Boehme
- Department of Physics &Astronomy, University of Utah, Salt Lake City, Utah 84112, USA
| | - Z Valy Vardeny
- Department of Physics &Astronomy, University of Utah, Salt Lake City, Utah 84112, USA
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19
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Ho CL, Yu ZQ, Wong WY. Multifunctional polymetallaynes: properties, functions and applications. Chem Soc Rev 2016; 45:5264-95. [DOI: 10.1039/c6cs00226a] [Citation(s) in RCA: 153] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Polymetallaynes of late transition metal elements have aroused considerable research attention. This Review article highlights the structure–property–function relationships of this class of metallopolymers and their emerging applications in electronic, optical and magnetic devices.
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Affiliation(s)
- Cheuk-Lam Ho
- Institute of Molecular Functional Materials
- Department of Chemistry and Institute of Advanced Materials
- Hong Kong Baptist University
- HKBU Institute of Research and Continuing Education
- Shenzhen Virtual University Park
| | - Zhen-Qiang Yu
- Shenzhen Key Laboratory of Functional Polymers
- School of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen 518060
- P. R. China
| | - Wai-Yeung Wong
- Institute of Molecular Functional Materials
- Department of Chemistry and Institute of Advanced Materials
- Hong Kong Baptist University
- HKBU Institute of Research and Continuing Education
- Shenzhen Virtual University Park
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20
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Andernach R, Utzat H, Dimitrov SD, McCulloch I, Heeney M, Durrant JR, Bronstein H. Synthesis and Exciton Dynamics of Triplet Sensitized Conjugated Polymers. J Am Chem Soc 2015. [DOI: 10.1021/jacs.5b06223] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rolf Andernach
- Centre
for Plastic Electronics, Imperial College London, London, United Kingdom SW7 2AZ
| | - Hendrik Utzat
- Centre
for Plastic Electronics, Imperial College London, London, United Kingdom SW7 2AZ
- Department
of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Stoichko D. Dimitrov
- Centre
for Plastic Electronics, Imperial College London, London, United Kingdom SW7 2AZ
| | - Iain McCulloch
- Centre
for Plastic Electronics, Imperial College London, London, United Kingdom SW7 2AZ
- SPERC, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Martin Heeney
- Centre
for Plastic Electronics, Imperial College London, London, United Kingdom SW7 2AZ
| | - James R. Durrant
- Centre
for Plastic Electronics, Imperial College London, London, United Kingdom SW7 2AZ
| | - Hugo Bronstein
- Department
of Chemistry, University College London, London, United Kingdom WC1H 0AJ
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21
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Shahroosvand H, Rezaei S, Mohajerani E, Mahmoudi M. Toward white electroluminescence by ruthenium quinoxaline light emitting diodes. NEW J CHEM 2015. [DOI: 10.1039/c4nj01938e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Exciplex transfer as a new approach to produce white electroluminescence in ruthenium quinoxaline light emitting diodes.
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Affiliation(s)
| | - Shiva Rezaei
- Chemistry Department
- University of Zanjan
- Zanjan
- Iran
| | | | - Malek Mahmoudi
- Laser and Plasma Research Institute
- Shahid Beheshti University
- Tehran
- Iran
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22
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Mahrok AK, Carrera EI, Tilley AJ, Ye S, Seferos DS. Synthesis and photophysical properties of platinum-acetylide copolymers with thiophene, selenophene and tellurophene. Chem Commun (Camb) 2015; 51:5475-8. [DOI: 10.1039/c4cc09312g] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of platinum-acetylide copolymers with thiophene, selenophene, and tellurophene have been synthesized and studied.
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Affiliation(s)
| | | | | | - Shuyang Ye
- Department of Chemistry
- University of Toronto
- Toronto
- Canada
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23
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Goswami S, Winkel RW, Alarousu E, Ghiviriga I, Mohammed OF, Schanze KS. Photophysics of Organometallic Platinum(II) Derivatives of the Diketopyrrolopyrrole Chromophore. J Phys Chem A 2014; 118:11735-43. [DOI: 10.1021/jp509987p] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Subhadip Goswami
- Department
of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Russell W. Winkel
- Department
of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Erkki Alarousu
- Solar
and Photovoltaics Engineering Research Center, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Ion Ghiviriga
- Department
of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
| | - Omar F. Mohammed
- Solar
and Photovoltaics Engineering Research Center, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Kirk S. Schanze
- Department
of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, United States
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24
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Ondarse-Alvarez D, Oldani N, Tretiak S, Fernandez-Alberti S. Computational Study of Photoexcited Dynamics in Bichromophoric Cross-Shaped Oligofluorene. J Phys Chem A 2014; 118:10742-53. [DOI: 10.1021/jp504720n] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- D. Ondarse-Alvarez
- Universidad Nacional de Quilmes, Roque Saenz Peña 352, B1876BXD Bernal, Argentina
| | - N. Oldani
- Universidad Nacional de Quilmes, Roque Saenz Peña 352, B1876BXD Bernal, Argentina
| | - S. Tretiak
- Theoretical
Division, Center for Nonlinear Studies (CNLS), and Center for Integrated
Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - S. Fernandez-Alberti
- Universidad Nacional de Quilmes, Roque Saenz Peña 352, B1876BXD Bernal, Argentina
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25
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Li H, Nieman R, Aquino AJA, Lischka H, Tretiak S. Comparison of LC-TDDFT and ADC(2) Methods in Computations of Bright and Charge Transfer States in Stacked Oligothiophenes. J Chem Theory Comput 2014; 10:3280-9. [DOI: 10.1021/ct500072f] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Hao Li
- Theoretical Division,
Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Reed Nieman
- Department
of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, United States
| | - Adélia J. A. Aquino
- Department
of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, United States
| | - Hans Lischka
- Department
of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, United States
- Institute
for Theoretical Chemistry, University of Vienna, Währingerstrasse
17, A-1090, Vienna, Austria
| | - Sergei Tretiak
- Theoretical Division,
Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
- Center for Integrated
Nanotechnologies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
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26
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Vivas MG, Silva DL, Malinge J, Boujtita M, Zaleśny R, Bartkowiak W, Ågren H, Canuto S, De Boni L, Ishow E, Mendonca CR. Molecular structure-optical property relationships for a series of non-centrosymmetric two-photon absorbing push-pull triarylamine molecules. Sci Rep 2014; 4:4447. [PMID: 24658327 PMCID: PMC3963076 DOI: 10.1038/srep04447] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Accepted: 03/07/2014] [Indexed: 12/31/2022] Open
Abstract
This article reports on a comprehensive study of the two-photon absorption (2PA) properties of six novel push-pull octupolar triarylamine compounds as a function of the nature of the electron-withdrawing groups. These compounds present an octupolar structure consisting of a triarylamine core bearing two 3,3′-bis(trifluoromethyl)phenyl arms and a third group with varying electron-withdrawing strength (H < CN < CHO < NO2 < Cyet < Vin). The 2PA cross-sections, measured by using the femtosecond open-aperture Z-scan technique, showed significant enhancement from 45 up to 125 GM for the lowest energy band and from 95 up to 270 GM for the highest energy band. The results were elucidated based on the large changes in the transition and permanent dipole moments and in terms of (i) EWG strength, (ii) degree of donor-acceptor charge transfer and (iii) electronic coupling between the arms. The 2PA results were eventually supported and confronted with theoretical DFT calculations of the two-photon transition oscillator strengths.
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Affiliation(s)
- Marcelo G Vivas
- 1] Instituto de Física de São Carlos, Universidade de São Paulo, Caixa Postal 369, 13560-970 São Carlos, SP, Brazil [2] Instituto de Ciência e Tecnologia, Universidade Federal de Alfenas, Cidade Universitária - BR 267 Km 533, 37715-400 Poços de Caldas, MG, Brazil
| | - Daniel L Silva
- 1] Instituto de Física, Universidade de São Paulo, CP 66318, 05314-970, São Paulo, SP, Brazil [2] Departamento de Ciências da Natureza, Matemática e Educação, Universidade Federal de São Carlos, Rod. Anhanguera - Km 174, 13600-970 Araras, SP, Brazil
| | - Jérémy Malinge
- PPSM-UMR CNRS 8531, ENS Cachan, 61 avenue du Président Wilson, 94235 Cachan, France
| | - Mohammed Boujtita
- CEISAM-UMR CNRS 6230, Université de Nantes, 2 rue de la Houssinière, 44322 Nantes, France
| | - Robert Zaleśny
- Theoretical Chemistry Group, Institute of Physical and Theoretical Chemistry, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Wojciech Bartkowiak
- Theoretical Chemistry Group, Institute of Physical and Theoretical Chemistry, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
| | - Hans Ågren
- Department of Theoretical Chemistry and Biology, School of Biotechnology, Royal Institute of Technology, SE-106 91 Stockholm, Sweden
| | - Sylvio Canuto
- Instituto de Física, Universidade de São Paulo, CP 66318, 05314-970, São Paulo, SP, Brazil
| | - Leonardo De Boni
- Instituto de Física de São Carlos, Universidade de São Paulo, Caixa Postal 369, 13560-970 São Carlos, SP, Brazil
| | - Eléna Ishow
- 1] PPSM-UMR CNRS 8531, ENS Cachan, 61 avenue du Président Wilson, 94235 Cachan, France [2] CEISAM-UMR CNRS 6230, Université de Nantes, 2 rue de la Houssinière, 44322 Nantes, France
| | - Cleber R Mendonca
- Instituto de Física de São Carlos, Universidade de São Paulo, Caixa Postal 369, 13560-970 São Carlos, SP, Brazil
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27
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Darko E, Heydarizadeh P, Schoefs B, Sabzalian MR. Photosynthesis under artificial light: the shift in primary and secondary metabolism. Philos Trans R Soc Lond B Biol Sci 2014; 369:20130243. [PMID: 24591723 DOI: 10.1098/rstb.2013.0243] [Citation(s) in RCA: 147] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
Providing an adequate quantity and quality of food for the escalating human population under changing climatic conditions is currently a great challenge. In outdoor cultures, sunlight provides energy (through photosynthesis) for photosynthetic organisms. They also use light quality to sense and respond to their environment. To increase the production capacity, controlled growing systems using artificial lighting have been taken into consideration. Recent development of light-emitting diode (LED) technologies presents an enormous potential for improving plant growth and making systems more sustainable. This review uses selected examples to show how LED can mimic natural light to ensure the growth and development of photosynthetic organisms, and how changes in intensity and wavelength can manipulate the plant metabolism with the aim to produce functionalized foods.
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Affiliation(s)
- Eva Darko
- Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, , Martonvásár, Hungary
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28
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Pensack RD, Song Y, McCormick TM, Jahnke AA, Hollinger J, Seferos DS, Scholes GD. Evidence for the Rapid Conversion of Primary Photoexcitations to Triplet States in Seleno- and Telluro- Analogues of Poly(3-hexylthiophene). J Phys Chem B 2014; 118:2589-97. [DOI: 10.1021/jp5013347] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Ryan D. Pensack
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Yin Song
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Theresa M. McCormick
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Ashlee A. Jahnke
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Jon Hollinger
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Dwight S. Seferos
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
| | - Gregory D. Scholes
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada
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