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Kuang C, Li S, Murtaza I, Meng Z, Li H, Zhang X, Wu C, Tong KN, Shang Y, He Y, Zhu Y, Wei G, Meng H. Enhanced Horizontal Dipole Orientation by Novel Penta-Helicene Anthracene-Based Host for Efficient Blue Fluorescent OLEDs. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2311114. [PMID: 38157494 DOI: 10.1002/smll.202311114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 12/19/2023] [Indexed: 01/03/2024]
Abstract
Due to the relatively low photoluminescence quantum yield (PLQY) and horizontal dipole orientation of doped films, anthracene-based fluorescent organic light-emitting diodes (F-OLEDs) have faced a great challenge to achieve high external quantum efficiency (EQE). Herein, a novel approach is introduced by incorporating penta-helicene into anthracene, presented as linear-shaped 3-(4-(10-phenylanthracen-9-yl)phenyl)dibenzo[c,g]phenanthrene (BABH) and 3-(4-(10-(naphthalen-2-yl)anthracen-9-yl)phenyl)dibenzo[c,g]phenanthrene (NABH). These blue hosts exhibit minimal intermolecular overlap of π-π stacking, effectively suppressing excimer formation, which facilitates the effective transfer of singlet energy to the fluorescent dopant for PLQY as high as 90%. Additionally, the as-obtained two hosts of BABH and NABH have effectively demonstrated major horizontal components transition dipole moments (TDM) and high thermal stability with glass transitional temperature (Tg) surpassing 188 °C, enhancing the horizontal dipole orientation of their doped films to be 89% and 93%, respectively. The OLEDs based on BABH and NABH exhibit excellent EQE of 10.5% and 12.4% at 462 nm and device lifetime up to 90% of the initial luminance over 4500 h at 100 cd m-2, which has firmly established them as among the most efficient blue F-OLEDs based on anthracene to date to the best knowledge. This work provides an instructive strategy to design an effective host for highly efficient and stable F-OLEDs.
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Affiliation(s)
- Changchun Kuang
- School of Advanced Materials, Peking University Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Siqi Li
- Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Imran Murtaza
- Department of Physics, International Islamic University, Islamabad, 44000, Pakistan
| | - Zhimin Meng
- School of Advanced Materials, Peking University Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Hongyang Li
- School of Advanced Materials, Peking University Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Xinkang Zhang
- School of Advanced Materials, Peking University Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Chengcheng Wu
- Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Kai-Ning Tong
- Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Yifan Shang
- School of Advanced Materials, Peking University Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Yaowu He
- School of Advanced Materials, Peking University Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
| | - Yanan Zhu
- Faculty of Materials Science, Shenzhen MSU-BIT University, Shenzhen, 518172, China
| | - Guodan Wei
- Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China
| | - Hong Meng
- School of Advanced Materials, Peking University Shenzhen Graduate School, Peking University, Shenzhen, 518055, China
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2
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Tamuly P, Moorthy JN. De Novo Synthesis of Acridone-Based Zn-Metal-Organic Framework (Zn-MOF) as a Photocatalyst: Application for Visible Light-Mediated Oxidation of Sulfides and Enaminones. ACS APPLIED MATERIALS & INTERFACES 2024; 16:3348-3358. [PMID: 38193378 DOI: 10.1021/acsami.3c15549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2024]
Abstract
Acridone, a cyclic analogue of benzophenone that undergoes efficient intersystem crossing (ISC) to the triplet-excited state with near-unity quantum yield, was elaborated as a 3-connecting triacid linker, i.e., H3AcTA, to develop a photocatalytic metal-organic framework (MOF) for energy transfer applications; the triacid linker inherently features concave shapes, an attribute that is important for the construction of MOFs with significant porosity. Metal ion (Zn2+)-assisted self-assembly of the triacid yielded a Zn-MOF, i.e., Zn-AcTA, with a solvent-accessible volume of ca. 31%. The protection of the acridone chromophore in the MOF in conjunction with a wider cross-section of its absorption in the visible region renders the MOF an excellent heterogeneous photosensitizer for singlet oxygen (1O2) generation by energy transfer to the ground-state triplet oxygen (3O2). It is shown that the Zn-MOF can be applied as a photosensitizing catalyst for visible light-mediated oxidation of various sulfides to sulfoxides and enaminones to amino-esters via 1,2-acyl migration. It is further demonstrated that the photocatalyst can be easily recycled without any loss of catalytic activity and structural integrity. Based on mechanistic investigations, 1O2 is established as the reactive oxygen species in photocatalytic oxidation reactions. The results constitute the first demonstration of rational development of a photocatalytic MOF based on acridone for heterogeneous oxidations mediated by 1O2.
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Affiliation(s)
- Parag Tamuly
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Jarugu Narasimha Moorthy
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
- School of Chemistry, Indian Institute of Science and Education Research, Thiruvananthrapuram, Trivandrum 695551, India
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3
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Warthegau SS, Hillers-Bendtsen AE, Pedersen SK, Rindom C, Braestrup C, Jensen JS, Hammerich O, Thomsen MS, Kamounah FS, Norman P, Mikkelsen KV, Brock-Nannestad T, Pittelkow M. Heterocyclic [9]Helicenes Exhibiting Bright Circularly Polarized Luminescence. Chemistry 2023; 29:e202301815. [PMID: 37458527 DOI: 10.1002/chem.202301815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 07/17/2023] [Indexed: 09/14/2023]
Abstract
We describe a concise synthetic strategy for the preparation of heterocyclic [9]helicenes and a simple preparative-scale protocol for the optical resolution of the resulting M- and P-enantiomers. The helicenes were characterized by single-crystal X-ray diffraction along with a range of spectroscopic and computational techniques. A fluorescence quantum yield of up to 65 % was observed, and the chiroptical properties of both M- and P-helicenes revealed large dissymmetry factors. The circularly polarized luminescence brightness reaches up to 17 M-1 cm-1 , as measured experimentally and verified computationally, which makes this the highest circularly polarized luminescence brightness among heterocyclic helicenes. We describe how chiroptical properties (both circular dichroism and circularly polarized luminescence) can be described and predicted using quantum chemical calculations. The synthetic approach also reveals by-products that originate from internal oxidation reactions, presumably mediated by the close proximity of the π-surfaces in the helicene structure.
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Affiliation(s)
- Stefan S Warthegau
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen Ø, Denmark
| | | | - Stephan K Pedersen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen Ø, Denmark
| | - Cecilie Rindom
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen Ø, Denmark
| | - Christoffer Braestrup
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen Ø, Denmark
| | - Jeppe S Jensen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen Ø, Denmark
| | - Ole Hammerich
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen Ø, Denmark
| | - Maria S Thomsen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen Ø, Denmark
| | - Fadhil S Kamounah
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen Ø, Denmark
| | - Patrick Norman
- Division of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, 100 44, Stockholm, Sweden
| | - Kurt V Mikkelsen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen Ø, Denmark
| | - Theis Brock-Nannestad
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen Ø, Denmark
| | - Michael Pittelkow
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen Ø, Denmark
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4
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Jana K, Sarkar D, Jaiswal P, Moorthy JN. Synthesis and Excited-State Properties of Donor-Acceptor Azahelical Coumarins. J Org Chem 2023. [PMID: 37114852 DOI: 10.1021/acs.joc.2c02810] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
A set of three donor-acceptor azahelical coumarins (DA-AHCs), namely, H-AHC, Me-AHC, and Ph-AHC, were rationally designed and synthesized, and their excited-state properties were comprehensively investigated. All three DA-AHCs are shown to display very high fluorosolvatochromic shifts as a result of significant intramolecular charge transfer in their excited states. The para-quinoidal forms of the latter apparently contribute predominantly to large dipole moments in their excited states. By virtue of the fact that these helical systems structurally incorporate a highly fluorescent coumarin dye, they exhibit high quantum yields in both solution and solid states. Indeed, their emission behaviors in the crystalline media are shown to be remarkably correlated with their respective crystal packings. Incisive analyses demonstrate (i) strengthening of hydrogen bonding in the excited state promotes quenching (H-AHC), (ii) efficient crystal packing promotes high emission (Me-AHC) by precluding deactivations via vibrational motions, and (iii) loose crystal packing contributes to excited-state deactivation to account for low quantum yields of emission (Ph-AHC).
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Affiliation(s)
- Kanyashree Jana
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Debarghya Sarkar
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Preeti Jaiswal
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
| | - Jarugu Narasimha Moorthy
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Trivandrum 695551, India
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5
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Zhang F, Rauch F, Swain A, Marder TB, Ravat P. Efficient Narrowband Circularly Polarized Light Emitters Based on 1,4-B,N-embedded Rigid Donor-Acceptor Helicenes. Angew Chem Int Ed Engl 2023; 62:e202218965. [PMID: 36799716 DOI: 10.1002/anie.202218965] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 02/16/2023] [Accepted: 02/17/2023] [Indexed: 02/18/2023]
Abstract
Narrow-band emission is essential for applicable circularly polarized luminescence (CPL) active materials in ultrahigh-definition CP-OLEDs. One of the most promising classes of CPL active molecules, helicenes, however, typically exhibit broad emission with a large Stokes shift. We present, herein, a design strategy capitalizing on intramolecular donor-acceptor interactions between nitrogen and boron atoms to address this issue. 1,4-B,N-embedded configurationally stable single- and double helicenes were synthesized straightforwardly. Both helicenes show unprecedentedly narrow fluorescence and CPL bands (full width at half maximum between 17-28 nm, 0.07-0.13 eV) along with high fluorescence quantum yields (72-85 %). Quantum chemical calculations revealed that the relative localization of the natural transition orbitals, mainly on the rigid core of the molecule, and small values of root-mean-square displacements between S0 and S1 state geometries, contribute to the narrower emission.
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Affiliation(s)
- Fangyuan Zhang
- Julius-Maximilians-Universität Würzburg, Institut für Organische Chemie, Am Hubland, 97074, Würzburg, Germany
| | - Florian Rauch
- Julius-Maximilians-Universität Würzburg, Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Am Hubland, 97074, Würzburg, Germany
| | - Asim Swain
- Julius-Maximilians-Universität Würzburg, Institut für Organische Chemie, Am Hubland, 97074, Würzburg, Germany
| | - Todd B Marder
- Julius-Maximilians-Universität Würzburg, Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Am Hubland, 97074, Würzburg, Germany
| | - Prince Ravat
- Julius-Maximilians-Universität Würzburg, Institut für Organische Chemie, Am Hubland, 97074, Würzburg, Germany
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6
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Rajan B, Goel N, Bedekar AV. Synthesis and characterization of aza[7]helicenes. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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7
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Synthesis and resolution of 2-amino-5-aza[6]helicene. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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8
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Lin YS, Abate SY, Wang CI, Wen YS, Chen CI, Hsu CP, Chueh CC, Tao YT, Sun SS. Low-Cost Hole-Transporting Materials Based on Carbohelicene for High-Performance Perovskite Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2021; 13:20051-20059. [PMID: 33896177 DOI: 10.1021/acsami.1c02004] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Two hole-transporting materials (HTMs) based on carbohelicene cores, CH1 and CH2, are developed and used in fabricating efficient and stable perovskite solar cells (PSCs). Owing to the rigid conformation of the helicene core, both compounds possess unique CH-π interactions in the crystalline packing pattern and good phase stability, which are distinct from the π-π intermolecular interactions of conventional planar and spiro-type molecules. PSCs based on CH1 and CH2 as HTMs deliver excellent device efficiencies of 19.36 and 18.71%, respectively, outperforming the control device fabricated with spiro-OMeTAD (18.45%). Furthermore, both PSCs exhibit better ambient stability, with 90% of initial performance retained after aging with a 50-60% relative humidity at 25 °C for 500 h. Due to the low production cost of both compounds, these newly designed carbohelicene-type HTMs have the potential for the future commercialization of PSCs.
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Affiliation(s)
- Yeo-Sin Lin
- Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan, ROC
- Nano Science and Technology Program, Taiwan International Graduate Program, Academia Sinica, Taipei 11529, Taiwan, ROC
- Department of Chemistry, National Taiwan University, 10617 Taipei, Taiwan, ROC
| | - Seid Yimer Abate
- Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan, ROC
| | - Chun-I Wang
- Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan, ROC
| | - Yuh-Sheng Wen
- Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan, ROC
| | - Chih-I Chen
- Department of Chemical Engineering, National Taiwan University, 10617 Taipei, Taiwan, ROC
| | - Chao-Ping Hsu
- Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan, ROC
- Physics Division, National Center of Theoretical Sciences, National Taiwan University, 10617 Taipei, Taiwan, ROC
| | - Chu-Chen Chueh
- Department of Chemical Engineering, National Taiwan University, 10617 Taipei, Taiwan, ROC
| | - Yu-Tai Tao
- Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan, ROC
| | - Shih-Sheng Sun
- Institute of Chemistry, Academia Sinica, Taipei 11529, Taiwan, ROC
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9
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Muriel B, Waser J. Azide Radical Initiated Ring Opening of Cyclopropenes Leading to Alkenyl Nitriles and Polycyclic Aromatic Compounds. Angew Chem Int Ed Engl 2021; 60:4075-4079. [PMID: 33205851 DOI: 10.1002/anie.202013516] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 11/04/2020] [Indexed: 01/05/2023]
Abstract
We report herein a radical-mediated amination of cyclopropenes. The transformation proceeds through a cleavage of the three-membered ring after the addition of an azide radical on the strained double bond and leads to tetrasubstituted alkenyl nitrile derivatives upon loss of N2 . With 1,2-diaryl substituted cyclopropenes, this methodology could be extended to a one-pot synthesis of highly functionalized polycyclic aromatic compounds (PACs). This transformation allows the synthesis of nitrile-substituted alkenes and aromatic compounds from rapidly accessed cyclopropenes using only commercially available reagents.
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Affiliation(s)
- Bastian Muriel
- Laboratory of Catalysis and Organic Synthesis, Ecole Polytechnique Fédérale de Lausanne, EPFL, SB ISIC LCSO, BCH 4306, 1015, Lausanne, Switzerland
| | - Jerome Waser
- Laboratory of Catalysis and Organic Synthesis, Ecole Polytechnique Fédérale de Lausanne, EPFL, SB ISIC LCSO, BCH 4306, 1015, Lausanne, Switzerland
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10
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Muriel B, Waser J. Azide Radical Initiated Ring Opening of Cyclopropenes Leading to Alkenyl Nitriles and Polycyclic Aromatic Compounds. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202013516] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Bastian Muriel
- Laboratory of Catalysis and Organic Synthesis Ecole Polytechnique Fédérale de Lausanne, EPFL, SB ISIC LCSO, BCH 4306 1015 Lausanne Switzerland
| | - Jerome Waser
- Laboratory of Catalysis and Organic Synthesis Ecole Polytechnique Fédérale de Lausanne, EPFL, SB ISIC LCSO, BCH 4306 1015 Lausanne Switzerland
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11
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Jiang X, Laffoon JD, Chen D, Pérez-Estrada S, Danis AS, Rodríguez-López J, Garcia-Garibay MA, Zhu J, Moore JS. Kinetic Control in the Synthesis of a Möbius Tris((ethynyl)[5]helicene) Macrocycle Using Alkyne Metathesis. J Am Chem Soc 2020; 142:6493-6498. [PMID: 32208689 DOI: 10.1021/jacs.0c01430] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The synthesis of conjugated Möbius molecules remains elusive since twisted and macrocyclic structures are low-entropy species sporting their own synthetic challenges. Here we report the synthesis of a Möbius macrocycle in 84% yield via alkyne metathesis of 2,13-bis(propynyl)[5]helicene. MALDI-MS, NMR spectroscopy, and X-ray diffraction indicated a trimeric product of twofold symmetry with PPM/MMP configurations in the helicene subunits. Alternatively, a threefold-symmetric PPP/MMM structure was determined by DFT calculations to be more thermodynamically stable, illustrating remarkable kinetic selectivity for this alkyne metathesis cyclooligomerization. Computational studies provided insight into the kinetic selectivity, demonstrating a difference of 15.4 kcal/mol between the activation barriers for the PPM/MMP and PPP/MMM diastereodetermining steps. Computational (ACID and EDDB) and experimental (UV-vis and fluorescence spectroscopy and cyclic voltammetry) studies revealed weak conjugation between the alkyne and adjacent helicene groups as well as the lack of significant global aromaticity. Separation of the PPM and MMP enantiomers was achieved via chiral HPLC at the analytical scale.
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Affiliation(s)
- Xing Jiang
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Joshua D Laffoon
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Dandan Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Salvador Pérez-Estrada
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Andrew S Danis
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States.,Joint Center for Energy Storage Research, Argonne, Illinois 60439, United States
| | - Joaquín Rodríguez-López
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States.,Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States.,Joint Center for Energy Storage Research, Argonne, Illinois 60439, United States
| | - Miguel A Garcia-Garibay
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, United States
| | - Jun Zhu
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Jeffrey S Moore
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States.,Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States.,Joint Center for Energy Storage Research, Argonne, Illinois 60439, United States
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12
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Zhang F, Michail E, Saal F, Krause A, Ravat P. Stereospecific Synthesis and Photophysical Properties of Propeller-Shaped C 90 H 48 PAH. Chemistry 2019; 25:16241-16245. [PMID: 31742798 PMCID: PMC6972628 DOI: 10.1002/chem.201904962] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Indexed: 12/22/2022]
Abstract
Herein, we have synthesized an enantiomerically pure propeller-shaped PAH, C90 H48 , possessing three [7]helicene and three [5]helicene subunits. This compound can be obtained in gram quantities in a straightforward manner. The photophysical and chiroptical properties were investigated using UV/Vis absorption and emission, optical rotation and circular dichroism spectroscopy, supported by DFT calculations. The nonlinear optical properties were investigated by two-photon absorption measurements using linearly and circularly polarized light. The extremely twisted structure and packing of the homochiral compound were investigated by single-crystal X-ray diffraction analysis.
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Affiliation(s)
- Fangyuan Zhang
- Institute of Organic ChemistryUniversity of WürzburgAm Hubland97074WürzburgGermany
| | - Evripidis Michail
- Institute of Organic ChemistryUniversity of WürzburgAm Hubland97074WürzburgGermany
| | - Fridolin Saal
- Institute of Organic ChemistryUniversity of WürzburgAm Hubland97074WürzburgGermany
| | - Ana‐Maria Krause
- Center for Nanosystems ChemistryUniversity of WürzburgTheodor-Boveri-Weg97074WürzburgGermany
| | - Prince Ravat
- Institute of Organic ChemistryUniversity of WürzburgAm Hubland97074WürzburgGermany
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13
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Mukhopadhyay A, Jana K, Hossen T, Sahu K, Moorthy JN. Coumarin-Annelated Regioisomeric Heptahelicenes: Influence of Helicity on Excited-State Properties and Chiroptical Properties. J Org Chem 2019; 84:10658-10668. [PMID: 31389698 DOI: 10.1021/acs.joc.9b01126] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Two regioisomeric pairs of heptahelical mono- and biscoumarins that are differentiated by "inward" and "outward" disposition of the pyran-2-one moiety have been synthesized and investigated to understand the influence of helicity on excited-state and chiroptical properties. A slight variation in the helicities is found to manifest in contrasting excited-state properties of coumarin-annelated heptahelicenes; in addition to the intramolecular charge transfer, structural relaxation in the excited state is shown from theoretical calculations to cause decrease in the fluorescence quantum yield for a system with higher helicity. The optically pure enantiomers of heptahelical coumarins exhibit helicity-dependent chiroptical properties, namely, specific rotations, molar ellipticities, Cotton effects, and anisotropic dissymmetry factors. Theoretical calculations point to factors that are not readily explicable.
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Affiliation(s)
- Arindam Mukhopadhyay
- Department of Chemistry , Indian Institute of Technology , Kanpur 208016 , India
| | - Kanyashree Jana
- Department of Chemistry , Indian Institute of Technology , Kanpur 208016 , India
| | - Tousif Hossen
- Department of Chemistry , Indian Institute of Technology , Guwahati 781039 , India
| | - Kalyanasis Sahu
- Department of Chemistry , Indian Institute of Technology , Guwahati 781039 , India
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14
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Dhbaibi K, Favereau L, Crassous J. Enantioenriched Helicenes and Helicenoids Containing Main-Group Elements (B, Si, N, P). Chem Rev 2019; 119:8846-8953. [DOI: 10.1021/acs.chemrev.9b00033] [Citation(s) in RCA: 242] [Impact Index Per Article: 48.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Kais Dhbaibi
- ISCR (Institut des Sciences Chimiques de Rennes), UMR6226, CNRS, Université Rennes, F-35000 Rennes, France
- Faculty of Science of Gabès, University of Gabés, Zrig, 6072 Gabès Tunisia
| | - Ludovic Favereau
- ISCR (Institut des Sciences Chimiques de Rennes), UMR6226, CNRS, Université Rennes, F-35000 Rennes, France
| | - Jeanne Crassous
- ISCR (Institut des Sciences Chimiques de Rennes), UMR6226, CNRS, Université Rennes, F-35000 Rennes, France
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15
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Cherni E, Champagne B, Ayadi S, Liégeois V. Magnetically-induced current density investigation in carbohelicenes and azahelicenes. Phys Chem Chem Phys 2019; 21:14678-14691. [PMID: 31215922 DOI: 10.1039/c9cp02071c] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A computational study of the magnetically-induced current (MIC) density has been carried out for a variety of ortho fused polycyclic aromatic molecules at the density functional theory level with the gauge including magnetically induced current (GIMIC) method. With this method, the aromatic character of each ring in a homologous series of carbohelicenes with an increasing number of fused benzene rings is assessed and compared with other aromaticity criteria such as the Nucleus Independent Chemical Shift [NICS(0), NICSzz(0)] and Bond Length Alternation (BLA) parameters. All criteria indicate that the two outer rings are the most aromatic ones [i.e. higher induced current, more negative NICS(0) and NICSzz(0) values, and smaller BLA values]. For the large helicenes (n > 10), the current drops along the following four rings and then rises again. Additionally, we have proven that this behavior is not due to a difference of the local magnetic field coming from a difference of orientation of the ring with respect to the external magnetic field (oriented along the helical axis). Upon fusing additional benzene rings to form hexa-peri-hexabenzo[7]helicene, some rings (B, D, and F) are a lot less aromatic (even non-aromatic) than the others. The NICS(0) and NICSzz(0) values exaggerate this behavior because they are all positive values, which is a signature of antiaromaticity. Then, when substituting one, three, or four benzene rings with pyrrole ones to form mono-aza-[7]-helicene, tri-aza-[7]-helicene, and tetra-aza-[7]-helicene, remarkable changes in the electronic structures of the helicenes are observed. Indeed, the induced currents are always smaller in the pyrrole rings than in the benzene ones. This has been further investigated using the streamline and the color map representations, which indicate that the diatropic current density passing through the plane cutting the C-N bonds in the pyrrole rings is stronger but is more localized than the current density passing through the plane cutting the C-C bonds in the benzene rings. This gives a positive but smaller total induced current for the pyrrole rings than for the benzene ones. For these systems, the NICS(0) and even more the NICSzz(0) values are not fully reliable to probe the local aromaticity, contrary to the induced current. Indeed, the NICSzz(0) values for the tri-aza-[7]-helicene molecule range from -14.23 to 1.14 ppm, which cannot lead to the same conclusion as the induced current values (10.03 to 12.87 nA T-1).
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Affiliation(s)
- Emna Cherni
- Chemistry Department, Faculty of Sciences of Tunis, University of Tunis El Manar, B.P 248 El Manar II, 2092 Tunis, Tunisia and Laboratory of Materials Molecules and Applications, Preparatory Institute for Scientific and Technical Studies, Carthage University, B.P:51, La Marsa, 2075 Tunis, Tunisia and Laboratory of Theoretical Chemistry, Unit of Theoretical and Structural Physical Chemistry, Namur Institute of Structured Matter, University of Namur, Rue de Bruxelles, 61, 5000 Namur, Belgium.
| | - Benoît Champagne
- Laboratory of Theoretical Chemistry, Unit of Theoretical and Structural Physical Chemistry, Namur Institute of Structured Matter, University of Namur, Rue de Bruxelles, 61, 5000 Namur, Belgium.
| | - Sameh Ayadi
- Laboratory of Materials Molecules and Applications, Preparatory Institute for Scientific and Technical Studies, Carthage University, B.P:51, La Marsa, 2075 Tunis, Tunisia
| | - Vincent Liégeois
- Laboratory of Theoretical Chemistry, Unit of Theoretical and Structural Physical Chemistry, Namur Institute of Structured Matter, University of Namur, Rue de Bruxelles, 61, 5000 Namur, Belgium.
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16
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Xu N, Li Y, Ricciarelli D, Wang J, Mosconi E, Yuan Y, De Angelis F, Zakeeruddin SM, Grätzel M, Wang P. An Oxa[5]helicene-Based Racemic Semiconducting Glassy Film for Photothermally Stable Perovskite Solar Cells. iScience 2019; 15:234-242. [PMID: 31079027 PMCID: PMC6517259 DOI: 10.1016/j.isci.2019.04.031] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 04/04/2019] [Accepted: 04/22/2019] [Indexed: 01/08/2023] Open
Abstract
Attaining the durability of high-efficiency perovskite solar cells (PSCs) operated under concomitant light and thermal stresses is still a serious concern before large-scale application. It is crucial to maintain the phase stability of the organic hole-transporting layer for thermostable PSCs across a range of temperatures sampled during device operation. To address this issue, we propose a racemic semiconducting glassy film with remarkable morphological stability, exemplified here by a low-molecular symmetry oxa[5]helicene-centered organic semiconductor (O5H-OMeDPA). The helical configuration of O5H-OMeDPA confers the trait of multiple-dimension charge transfer to the solid, resulting in high hole mobility of 6.7 × 10-4 cm2 V-1 s-1 of a solution-processed glassy film. O5H-OMeDPA is combined with a triple-cation dual-halide lead perovskite to fabricate PSCs with power conversion efficiencies of 21.03%, outperforming the control cells with spiro-OMeTAD (20.44%). Moreover, the cells using O5H-OMeDPA exhibit good long-term stability during full-sunlight soaking at 60°C.
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Affiliation(s)
- Niansheng Xu
- Department of Chemistry, Zhejiang University, Hangzhou 310028, China
| | - Yang Li
- Department of Chemistry, Zhejiang University, Hangzhou 310028, China; Laboratory of Photonics and Interfaces, Institute of Chemical Sciences & Engineering, École Polytechnique Fédérale de Lausanne, Lausanne 1015, Switzerland
| | - Damiano Ricciarelli
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy; Computational Laboratory for Hybrid/Organic Photovoltaics, CNR-ISTM, Via Elce di Sotto 8, 06123 Perugia, Italy
| | - Jianan Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310028, China
| | - Edoardo Mosconi
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
| | - Yi Yuan
- Department of Chemistry, Zhejiang University, Hangzhou 310028, China
| | - Filippo De Angelis
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy; Computational Laboratory for Hybrid/Organic Photovoltaics, CNR-ISTM, Via Elce di Sotto 8, 06123 Perugia, Italy; D3-Computation, Istituto Italiano di Tecnologia, Via Morego, Genova, Italy.
| | - Shaik M Zakeeruddin
- Laboratory of Photonics and Interfaces, Institute of Chemical Sciences & Engineering, École Polytechnique Fédérale de Lausanne, Lausanne 1015, Switzerland
| | - Michael Grätzel
- Laboratory of Photonics and Interfaces, Institute of Chemical Sciences & Engineering, École Polytechnique Fédérale de Lausanne, Lausanne 1015, Switzerland
| | - Peng Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310028, China.
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17
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Salerno F, Rice B, Schmidt JA, Fuchter MJ, Nelson J, Jelfs KE. The influence of nitrogen position on charge carrier mobility in enantiopure aza[6]helicene crystals. Phys Chem Chem Phys 2019; 21:5059-5067. [DOI: 10.1039/c8cp07603k] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A computational study exploring the influence of the nitrogen position on charge carrier mobility in enantiopure aza[6]helicene crystals
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Affiliation(s)
- Francesco Salerno
- Department of Chemistry
- Imperial College London
- London W12 0BZ
- UK
- Centre for Plastic Electronics
| | - Beth Rice
- Centre for Plastic Electronics
- Imperial College London
- London SW7 2AZ
- UK
- Department of Physics
| | | | - Matthew J. Fuchter
- Department of Chemistry
- Imperial College London
- London W12 0BZ
- UK
- Centre for Plastic Electronics
| | - Jenny Nelson
- Centre for Plastic Electronics
- Imperial College London
- London SW7 2AZ
- UK
- Department of Physics
| | - Kim E. Jelfs
- Department of Chemistry
- Imperial College London
- London W12 0BZ
- UK
- Centre for Plastic Electronics
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18
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Maka VK, Mukhopadhyay A, Savitha G, Moorthy JN. Fluorescent 2D metal-organic framework nanosheets (MONs): design, synthesis and sensing of explosive nitroaromatic compounds (NACs). NANOSCALE 2018; 10:22389-22399. [PMID: 30474671 DOI: 10.1039/c8nr04992k] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
2D metal-organic framework nanosheets (MONs) lie at the heart of contemporary research on metal-organic materials. We have rationally designed and synthesized a fluorescent 6-connecting hexaacid linker H6TPA based on the 1,3,5-triphenylbenzene core to access layered MOFs by metal-assisted self-assembly. Treatment of H6TPA with In3+ salt does indeed lead to a layered porous MOF, i.e.In-TPA. It is shown that the ultrasonication-induced liquid phase of exfoliation (UILPE) of the latter in a top-down fashion affords few-layer 2D metal-organic nanosheets (MONs). The delamination of 2D MONs in ethanol occurs with 'turn-on' fluorescence, which is otherwise suppressed in the bulk material. The exfoliated MONs in ethanol exhibit blue fluorescence with a respectable quantum yield of 0.15 and serve as efficient sensory materials for 'turn-off' fluorescence detection of explosive nitroaromatic compounds (NACs). While all nitroaromatics are found to quench the fluorescence of MONs, the most electron-deficient trinitrotoluene (TNT) exhibited the highest efficiency; at 2 mM concentration of TNT, the fluorescence of 2D MONs was found to be quenched with an efficiency of 80% (permitting the detection of TNT at ca. 11 ppm level), while that of the unmetallated linker, i.e.H6TPA, was quenched with only 5% efficiency. The unique attributes of MONs, namely the rigidity of the linker upon metallation and porosity that facilitates guest confinement within the pores, for efficient sensing of nitroaromatics are thus demonstrated for the first time.
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Affiliation(s)
- Vijay Kumar Maka
- Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India.
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19
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Lin YS, Abate SY, Lai KW, Chu CW, Lin YD, Tao YT, Sun SS. New Helicene-Type Hole-Transporting Molecules for High-Performance and Durable Perovskite Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2018; 10:41439-41449. [PMID: 30406998 DOI: 10.1021/acsami.8b16601] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Three azahelicene derivatives with electron-rich bis(4-methoxyphenyl)amino or bis( p-methoxyphenyl)aminophenyl groups at the terminals were deliberately designed, synthesized, and characterized as hole-transporting materials (HTMs) for perovskite solar cells (PSCs). Optical and thermal properties, energy level alignments, film morphologies, hole extraction ability, and hole mobility were studied in detail. PSCs using the newly synthesized molecules as HTMs were fabricated. A maximum power conversion efficiency (PCE) of 17.34% was observed for the bis( p-methoxyphenyl)amino-substituted derivative (SY1) and 16.10% for the bis( p-methoxyphenyl)aminophenyl-substituted derivative (SY2). Longer-chain substituent such as hexyloxy group greatly diminishes the efficiency. In addition, the dopant-free devices fabricated with SY1 as the HTM shows an average PCE of 12.13%, which is significantly higher than that of spiro-OMeTAD (7.61%). The ambient long-term stability test revealed that after 500 h, the devices prepared from SY1 and SY2 retained more than 96% of its initial performance, which is much improved than the reference device with standard spiro-OMeTAD as the HTM under the same conditions. Detailed material cost analysis reveals that the material cost for SY1 is less than 8% of that for spiro-OMeTAD. These results provide a useful direction for designing a new class of HTMs to prepare highly efficient and more durable PSCs.
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Affiliation(s)
| | - Seid Yimer Abate
- Department of Applied Chemistry , National Chiao-Tung University , Hsinchu 300 , Taiwan , Republic of China
| | - Kuan-Wen Lai
- Research Center for Applied Sciences , Academia Sinica , Nankang, Taipei 11529 , Taiwan , Republic of China
| | - Chih-Wei Chu
- Research Center for Applied Sciences , Academia Sinica , Nankang, Taipei 11529 , Taiwan , Republic of China
| | - Yan-Duo Lin
- Department of Applied Chemistry , National Chiayi University , Chiayi 600 , Taiwan , Republic of China
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20
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Reger D, Haines P, Heinemann FW, Guldi DM, Jux N. Oxa[7]superhelicen: ein π-erweiterter, helikaler Chromophor auf Hexa-peri
-hexabenzocoronen-Basis. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201800585] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- David Reger
- Department Chemie und Pharmazie &, Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Nikolaus-Fiebiger-Straße 10 91058 Erlangen Deutschland
| | - Philipp Haines
- Department Chemie und Pharmazie &, Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Egerlandstraße 3 91058 Erlangen Deutschland
| | - Frank W. Heinemann
- Department Chemie und Pharmazie; Friedrich-Alexander-Universität Erlangen-Nürnberg; Egerlandstraße 1 91058 Erlangen Deutschland
| | - Dirk M. Guldi
- Department Chemie und Pharmazie &, Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Egerlandstraße 3 91058 Erlangen Deutschland
| | - Norbert Jux
- Department Chemie und Pharmazie &, Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Nikolaus-Fiebiger-Straße 10 91058 Erlangen Deutschland
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21
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Reger D, Haines P, Heinemann FW, Guldi DM, Jux N. Oxa[7]superhelicene: A π-Extended Helical Chromophore Based on Hexa-peri
-hexabenzocoronenes. Angew Chem Int Ed Engl 2018; 57:5938-5942. [DOI: 10.1002/anie.201800585] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 02/20/2018] [Indexed: 01/14/2023]
Affiliation(s)
- David Reger
- Department Chemie und Pharmazie & Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Nikolaus-Fiebiger-Strasse 10 91058 Erlangen Germany
| | - Philipp Haines
- Department Chemie und Pharmazie & Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Egerlandstrasse 3 91058 Erlangen Germany
| | - Frank W. Heinemann
- Department Chemie und Pharmazie; Friedrich-Alexander-Universität Erlangen-Nürnberg; Egerlandstrasse 1 91058 Erlangen Germany
| | - Dirk M. Guldi
- Department Chemie und Pharmazie & Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Egerlandstrasse 3 91058 Erlangen Germany
| | - Norbert Jux
- Department Chemie und Pharmazie & Interdisciplinary Center for Molecular Materials (ICMM); Friedrich-Alexander-Universität Erlangen-Nürnberg; Nikolaus-Fiebiger-Strasse 10 91058 Erlangen Germany
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22
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Luo X, Liu Z, Zhang B, Hua W, Feng Y, Li L, Zhang D, Cui D. Substituent Effects on Selective Syntheses of Fused‐Ring Heterocycles Based on Carbazole and Naphthalene by Photocyclization: Synthesis, Crystal Structures, and Properties. ChemistrySelect 2018. [DOI: 10.1002/slct.201800267] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Xin‐Yu Luo
- State Key Laboratory of Crystal MaterialsShandong University 27 Shanda Rd. Jinan 250100 (P. R. China
| | - Zhi Liu
- State Key Laboratory of Crystal MaterialsShandong University 27 Shanda Rd. Jinan 250100 (P. R. China
| | - Bao‐Jie Zhang
- State Key Laboratory of Crystal MaterialsShandong University 27 Shanda Rd. Jinan 250100 (P. R. China
| | - Wan‐Ming Hua
- State Key Laboratory of Crystal MaterialsShandong University 27 Shanda Rd. Jinan 250100 (P. R. China
| | - Ying Feng
- State Key Laboratory of Crystal MaterialsShandong University 27 Shanda Rd. Jinan 250100 (P. R. China
| | - Li Li
- State Key Laboratory of Crystal MaterialsShandong University 27 Shanda Rd. Jinan 250100 (P. R. China
| | - Ding‐Chao Zhang
- State Key Laboratory of Crystal MaterialsShandong University 27 Shanda Rd. Jinan 250100 (P. R. China
| | - De‐Liang Cui
- State Key Laboratory of Crystal MaterialsShandong University 27 Shanda Rd. Jinan 250100 (P. R. China
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23
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Jhulki S, Seth S, Rafiq S, Ghosh A, Chow TJ, Moorthy JN. Nitrogen-Free Bifunctional Bianthryl Leads to Stable White-Light Emission in Bilayer and Multilayer OLED Devices. ACS OMEGA 2018; 3:1416-1424. [PMID: 31458471 PMCID: PMC6641470 DOI: 10.1021/acsomega.7b01712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 01/19/2018] [Indexed: 06/10/2023]
Abstract
White organic light-emitting diodes (WOLEDs) are at the center stage of OLED research today because of their advantages in replacing the high energy-consuming lighting technologies in vogue for a long time. New materials that emit white light in simple devices are much sought after. We have developed two novel electroluminescent materials, referred to as BABZF and BATOMe, based on a twisted bianthryl core, which are brilliantly fluorescent, thermally highly stable with high T d and T g, and exhibit reversible redox property. Although inherently blue emissive, BABZF leads to white-light emission (CIE ≈ 0.28, 0.33) with a moderate power efficiency of 2.24 lm/W and a very high luminance of 15 600 cd/m2 in the fabricated multilayer nondoped OLED device. This device exhibited excellent color stability over a range of applied potential. Remarkably, similar white-light emission was captured even from a double-layer device, attesting to the innate hole-transporting ability of BABZF despite it being non-nitrogenous, that is, lacking any traditional hole-transporting di-/triarylamino group(s). Similar studies with BATOMe led to inferior device performance results, thereby underscoring the importance of dibenzofuryl groups in BABZF. Experimental as well as theoretical studies suggest the possibility of emission from multiple species involving BABZF and its exciplex and electroplex in the devices. The serendipitously observed white-light emission from a double-layer device fabricated with an unconventional hole-transporting material (HTM) opens up new avenues to create new non-nitrogenous HTMs that may lead to more efficient white-light emission in simple double-layer devices.
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Affiliation(s)
- Samik Jhulki
- Department
of Chemistry, Indian Institute of Technology
Kanpur, Kanpur 208016, India
| | - Saona Seth
- Department
of Chemistry, Indian Institute of Technology
Kanpur, Kanpur 208016, India
| | - Shahnawaz Rafiq
- Frick
Chemistry Laboratory, Princeton University, Princeton, New Jersey 08544, United States
| | - Avijit Ghosh
- Institute
of Chemistry Academia Sinica, Taipei, Taiwan 115
- Department
of Chemistry, Tunghai University, Taichung, Taiwan 407
| | - Tahsin J. Chow
- Institute
of Chemistry Academia Sinica, Taipei, Taiwan 115
- Department
of Chemistry, Tunghai University, Taichung, Taiwan 407
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24
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Mukhopadhyay A, Mishra AK, Jana K, Moorthy JN. A new MediaChrom (fluorosolvatochromic and acidochromic) based on bipolar donor-acceptor conjoined carbazolo-phenazine. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.07.041] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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25
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Mukhopadhyay A, Hossen T, Ghosh I, Koner AL, Nau WM, Sahu K, Moorthy JN. Helicity-Dependent Regiodifferentiation in the Excited-State Quenching and Chiroptical Properties of Inward/Outward Helical Coumarins. Chemistry 2017; 23:14797-14805. [PMID: 28792106 DOI: 10.1002/chem.201701787] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Indexed: 01/30/2023]
Abstract
Influence of helicity on the excited-state as well as chiroptical properties of two sets of regiohelical coumarins that are differentiated by "inward" and "outward" disposition of the pyran-2-one ring has been investigated. A subtle difference in the helicities manifests in divergent excited-state properties and significant differences in the dipole moments. The latter permit heretofore unprecedented regiodifferentiation in the O-H⋅⋅⋅O hydrogen-bond assisted electron-transfer quenching by phenols. Furthermore, the enantiopure hexahelical coumarins exhibit strong Cotton effects and lend themselves to a very high differentiation in the specific rotations and anisotropic dissymmetry factors. The specific rotation observed for 6-in turns out being the highest of the values reported for all hexahelicenes reported so far.
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Affiliation(s)
| | - Tousif Hossen
- Department of Chemistry, Indian Institute of Technology, Guwahati, 781039, India
| | - Indrajit Ghosh
- Department of Life Sciences and Chemistry, Jacobs University Bremen, Campus Ring 1, 28759, Bremen, Germany
| | - Apurba Lal Koner
- Department of Chemistry, Indian Institute of Science Education and Research, Bhopal, 462066, India
| | - Werner M Nau
- Department of Life Sciences and Chemistry, Jacobs University Bremen, Campus Ring 1, 28759, Bremen, Germany
| | - Kalyanasis Sahu
- Department of Chemistry, Indian Institute of Technology, Guwahati, 781039, India
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26
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Mishra AK, Mukhopadhyay A, Moorthy JN. One-pot multistep synthesis of bipolar carbazolo-phenazines: Hydrogen bond control of Diels-Alder cycloaddition and application for fluoride sensing. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.02.052] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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27
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Wang CZ, Kihara R, Feng X, Thuéry P, Redshaw C, Yamato T. Synthesis, Structure and Photophysical Properties of Pyrene-based [5]Helicenes: an Experimental and Theoretical Study. ChemistrySelect 2017. [DOI: 10.1002/slct.201601327] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Chuan-Zeng Wang
- Department of Applied Chemistry; Faculty of Science and Engineering; Saga University; Honjo-machi 1 Saga 840-8502 Japan
| | - Rie Kihara
- Department of Applied Chemistry; Faculty of Science and Engineering; Saga University; Honjo-machi 1 Saga 840-8502 Japan
| | - Xing Feng
- Department of Applied Chemistry; Faculty of Science and Engineering; Saga University; Honjo-machi 1 Saga 840-8502 Japan
- School of Printing and Packaging Engineering; Beijing Institute of Graphic Communication; 1 Xinghua Avenue (Band Two), Daxing Beijing 102600 P. R. China
| | - Pierre Thuéry
- NIMBE, CEA, CNRS; Université Paris-Saclay; CEA Saclay; 91191 Gif-sur-Yvette France
| | - Carl Redshaw
- SchoolofMathematicsandPhysicalSciences; The University of Hull; Cottingham Road Hull, Yorkshire HU6 7RX UK
| | - Takehiko Yamato
- Department of Applied Chemistry; Faculty of Science and Engineering; Saga University; Honjo-machi 1 Saga 840-8502 Japan
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28
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Jhulki S, Mishra AK, Chow TJ, Moorthy JN. Carbo[5]helicene versus planar phenanthrene as a scaffold for organic materials in OLEDs: the electroluminescence of anthracene-functionalized emissive materials. NEW J CHEM 2017. [DOI: 10.1039/c7nj02233f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Rigid and twisted carbo[5]helicene imparts better physical and electroluminescence properties than planar phenantherene for phenylanthracene-functionalized emissive materials.
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Affiliation(s)
- Samik Jhulki
- Department of Chemistry
- Indian Institute of Technology
- Kanpur 208016
- India
| | | | - Tahsin J. Chow
- Institute of Chemistry
- Academia Sinica
- Taipei
- Republic of China
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29
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Jhulki S, Bajpai A, Nagarajaiah H, Chow TJ, Moorthy JN. Tri- and tetraarylanthracenes with novel λ, χ and ψ topologies as blue-emissive and fluorescent host materials in organic light-emitting diodes (OLEDs). NEW J CHEM 2017. [DOI: 10.1039/c7nj00324b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aryl-anthracene derivatives with λ, χ and ψ topologies serve as materials in OLEDs with intriguingly similar physical and electroluminescence properties.
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Affiliation(s)
- Samik Jhulki
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Alankriti Bajpai
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | | | - Tahsin J. Chow
- Institute of Chemistry
- Academia Sinica
- Taipei
- Republic of China
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30
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Borges da Silva R, Teixeira RI, Wardell JL, Wardell SMSV, Garden SJ. Copper(ii) catalyzed synthesis of novel helical luminescent benzo[4,5]imidazo[1,2-a][1,10]phenanthrolines via an intramolecular C–H amination reaction. Org Biomol Chem 2017; 15:812-826. [DOI: 10.1039/c6ob02508k] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Novel helical luminescent benzoimidazophenanthrolines were prepared using a Cu(ii) catalyzed C–H amination reaction.
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Affiliation(s)
- Ramon Borges da Silva
- Instituto de Química
- Universidade Federal do Rio de Janeiro
- Centro Tecnológica
- Bloco A
- Cidade Universitária
| | - Rodolfo Inêz Teixeira
- Instituto de Química
- Universidade Federal do Rio de Janeiro
- Centro Tecnológica
- Bloco A
- Cidade Universitária
| | - James L. Wardell
- Instituto de Tecnologia em Fármacos – Farmanguinhos
- Fiocruz. R. Sizenando Nabuco
- Rio de Janeiro
- Brazil
- Department of Chemistry
| | | | - Simon J. Garden
- Instituto de Química
- Universidade Federal do Rio de Janeiro
- Centro Tecnológica
- Bloco A
- Cidade Universitária
| |
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