1
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Wanie V, Bloch E, Månsson EP, Colaizzi L, Ryabchuk S, Saraswathula K, Ordonez AF, Ayuso D, Smirnova O, Trabattoni A, Blanchet V, Ben Amor N, Heitz MC, Mairesse Y, Pons B, Calegari F. Capturing electron-driven chiral dynamics in UV-excited molecules. Nature 2024; 630:109-115. [PMID: 38778116 PMCID: PMC11153151 DOI: 10.1038/s41586-024-07415-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Accepted: 04/11/2024] [Indexed: 05/25/2024]
Abstract
Chiral molecules, used in applications such as enantioselective photocatalysis1, circularly polarized light detection2 and emission3 and molecular switches4,5, exist in two geometrical configurations that are non-superimposable mirror images of each other. These so-called (R) and (S) enantiomers exhibit different physical and chemical properties when interacting with other chiral entities. Attosecond technology might enable influence over such interactions, given that it can probe and even direct electron motion within molecules on the intrinsic electronic timescale6 and thereby control reactivity7-9. Electron currents in photoexcited chiral molecules have indeed been predicted to enable enantiosensitive molecular orientation10, but electron-driven chiral dynamics in neutral molecules have not yet been demonstrated owing to the lack of ultrashort, non-ionizing and perturbative light pulses. Here we use time-resolved photoelectron circular dichroism (TR-PECD)11-15 with an unprecedented temporal resolution of 2.9 fs to map the coherent electronic motion initiated by ultraviolet (UV) excitation of neutral chiral molecules. We find that electronic beatings between Rydberg states lead to periodic modulations of the chiroptical response on the few-femtosecond timescale, showing a sign inversion in less than 10 fs. Calculations validate this and also confirm that the combination of the photoinduced chiral current with a circularly polarized probe pulse realizes an enantioselective filter of molecular orientations following photoionization. We anticipate that our approach will enable further investigations of ultrafast electron dynamics in chiral systems and reveal a route towards enantiosensitive charge-directed reactivity.
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Affiliation(s)
- Vincent Wanie
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany.
| | - Etienne Bloch
- Université de Bordeaux - CNRS - CEA, CELIA, UMR5107, Talence, France
| | - Erik P Månsson
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
| | - Lorenzo Colaizzi
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
- Physics Department, Universität Hamburg, Hamburg, Germany
- Department of Physics, Politecnico di Milano, Milano, Italy
| | - Sergey Ryabchuk
- Physics Department, Universität Hamburg, Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging, Universität Hamburg, Hamburg, Germany
| | - Krishna Saraswathula
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
- Physics Department, Universität Hamburg, Hamburg, Germany
| | - Andres F Ordonez
- Department of Physics, Imperial College London, London, UK
- School of Physical and Chemical Sciences, Queen Mary University of London, London, UK
| | - David Ayuso
- Department of Physics, Imperial College London, London, UK
- Max-Born-Institut, Berlin, Germany
- School of Physical and Chemical Sciences, Queen Mary University of London, London, UK
| | - Olga Smirnova
- Max-Born-Institut, Berlin, Germany
- Technische Universität Berlin, Berlin, Germany
| | - Andrea Trabattoni
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany
- Institute of Quantum Optics, Leibniz Universität Hannover, Hannover, Germany
| | - Valérie Blanchet
- Université de Bordeaux - CNRS - CEA, CELIA, UMR5107, Talence, France
| | - Nadia Ben Amor
- CNRS, UPS, LCPQ (Laboratoire de Chimie et Physique Quantiques), FeRMI, Toulouse, France
| | - Marie-Catherine Heitz
- CNRS, UPS, LCPQ (Laboratoire de Chimie et Physique Quantiques), FeRMI, Toulouse, France
| | - Yann Mairesse
- Université de Bordeaux - CNRS - CEA, CELIA, UMR5107, Talence, France
| | - Bernard Pons
- Université de Bordeaux - CNRS - CEA, CELIA, UMR5107, Talence, France.
| | - Francesca Calegari
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany.
- Physics Department, Universität Hamburg, Hamburg, Germany.
- The Hamburg Centre for Ultrafast Imaging, Universität Hamburg, Hamburg, Germany.
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2
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Jiang P, Mikherdov AS, Ito H, Jin M. Crystallization-Induced Chirality Transfer in Conformationally Flexible Azahelicene Au(I) Complexes with Circularly Polarized Luminescence Activation. J Am Chem Soc 2024; 146:12463-12472. [PMID: 38626915 DOI: 10.1021/jacs.4c00345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2024]
Abstract
Flexible and twisted annulated π-systems exhibit numerous unique and desirable features, owing to their ability to display chirality. However, preventing their racemization due to the dynamic nature of their chirality remains a challenge. One promising approach to stabilize homochirality in such systems is chirality transfer from a chiral auxiliary to a moiety displaying dynamic chirality. Herein, we introduce a new approach for dynamic chirality stabilization in conformationally flexible azahelicene species via crystallization-induced intermolecular chirality transfer in Au(I) complexes featuring azahelicene (dibenzo[c,g]carbazole and benzo[c]carbazole) and enantio-pure chiral N-heterocyclic carbene (NHC) ligands with a complementary tailored shape. Crystallization of these azahelicene Au(I) complexes not only suppresses the dynamic chirality of the dibenzocarbazole species but also stabilizes their homochirality through the intermolecular conjunction between the chiral NHC and dibenzocarbazole ligands. In the Au(I) benzocarbazole complexes, the intermolecular conjunction and chirality transfer in the crystals induce chirality in the initially achiral benzocarbazole ligand. Furthermore, the crystallization of the studied complexes activates their circularly polarized luminescence (CPL) properties, which were suppressed in solution. Importantly, chirality transfer leads to significant CPL enhancement; the complexes that feature chirality transfer within the crystal structure exhibit luminescence dissymmetry factors 5 to 10 times higher than those of the complexes without chirality transfer.
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Affiliation(s)
- Pingyu Jiang
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
| | - Alexander S Mikherdov
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
| | - Hajime Ito
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
| | - Mingoo Jin
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
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3
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Liu X, Liang Z, Jin Z, Zhang X, Shen C. Enantiomerization of five-membered-heterocycle-embedded helicenes: A DFT study. J Comput Chem 2024; 45:454-460. [PMID: 37945374 DOI: 10.1002/jcc.27252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 10/24/2023] [Accepted: 10/26/2023] [Indexed: 11/12/2023]
Abstract
In this work, DFT theoretical calculations were employed to investigate the enantiomerization of helicenes embedded with five-membered heterocycles. The original benzene rings in the helicene backbone were replaced by heterocycles such as furan, thiophene, pyrrole, or phosphole to create [n]helicenes with n ranging from 4 to 7. The impact of the type, position, and number of heterocycles on the enantiomerization barrier was systematically evaluated. Notably, the enantiomerization barrier was found to be significantly dependent on the rotatory angle and the position of the heterocycles, particularly for [4, 5]helicenes. With less rotatory angle of heterocycle, the enantiomerization barrier of helicenes was revealed to be lower, while when the heterocycle was close to the central part of the helicene chain, the barrier was also lower. Furthermore, the number of thiophene rings also had a marked effect on enantiomerization, showing a decrease of the barrier with more thiophene rings placed on the helicenes backbone. We expect this work would deliver new perspective on the relative studies for the helicene conformational conversion.
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Affiliation(s)
- Xunshan Liu
- School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou, China
| | - Zhen Liang
- School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou, China
| | - Zhetong Jin
- School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou, China
| | - Xu Zhang
- College of Chemistry and Life Science, Chifeng University, Chifeng, China
| | - Chengshuo Shen
- School of Chemistry and Chemical Engineering, Zhejiang Sci-Tech University, Hangzhou, China
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4
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Shioukhi I, Batchu H, Schwartz G, Minion L, Deree Y, Bogoslavsky B, Shimon LJW, Wade J, Hoffman R, Fuchter MJ, Markovich G, Gidron O. Helitwistacenes-Combining Lateral and Longitudinal Helicity Results in Solvent-Induced Inversion of Circularly Polarized Light. Angew Chem Int Ed Engl 2024; 63:e202319318. [PMID: 38224528 DOI: 10.1002/anie.202319318] [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: 12/14/2023] [Revised: 01/12/2024] [Accepted: 01/15/2024] [Indexed: 01/17/2024]
Abstract
Helicity is expressed differently in ortho- and para-fused acenes-helicenes and twistacenes, respectively. While the extent of helicity is constant in helicenes, it can be tuned in twistacenes, and the handedness of flexible twistacenes is often determined by more rigid helicenes. Here, we combine helicenes with rigid twistacenes consisting of a tunable degree of twisting, forming helitwistacenes. While the X-ray structures reveal that the connection does not affect the helicity of each moiety, their electronic circular dichroism (ECD) and circularly polarized luminescence (CPL) spectra are strongly affected by the helicity of the twistacene unit, resulting in solvent-induced sign inversion. ROESY NMR and TD-DFT calculations support this observation, which is explained by differences in the relative orientation of the helicene and twistacene moieties.
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Affiliation(s)
- Israa Shioukhi
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Edmond J. Safra Campus, 9190401, Jerusalem, Israel
| | - Harikrishna Batchu
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Edmond J. Safra Campus, 9190401, Jerusalem, Israel
| | - Gal Schwartz
- School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, 6997801, Tel Aviv, Israel
| | - Louis Minion
- Molecular Sciences Research Hub, Department of Chemistry, Imperial College London, White City Campus, 82 Wood Lane, W12 0BZ, London, U.K
| | - Yinon Deree
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Edmond J. Safra Campus, 9190401, Jerusalem, Israel
| | - Benny Bogoslavsky
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Edmond J. Safra Campus, 9190401, Jerusalem, Israel
| | - Linda J W Shimon
- Chemical Research Support Unit, Weizmann Institute of Science, 76100, Rehovot, Israel
| | - Jessica Wade
- Molecular Sciences Research Hub, Department of Chemistry, Imperial College London, White City Campus, 82 Wood Lane, W12 0BZ, London, U.K
- Department of Materials, Royal School of Mines, Imperial College London, SW7 2AZ, London, U.K
| | - Roy Hoffman
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Edmond J. Safra Campus, 9190401, Jerusalem, Israel
| | - Matthew J Fuchter
- Molecular Sciences Research Hub, Department of Chemistry, Imperial College London, White City Campus, 82 Wood Lane, W12 0BZ, London, U.K
| | - Gil Markovich
- School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, 6997801, Tel Aviv, Israel
| | - Ori Gidron
- Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Edmond J. Safra Campus, 9190401, Jerusalem, Israel
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5
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Bao ST, Louie S, Jiang H, Jiang Q, Sun S, Steigerwald ML, Nuckolls C, Jin Z. Near-Infrared, Organic Chiroptic Switch with High Dissymmetry Factors. J Am Chem Soc 2024; 146:51-56. [PMID: 38110244 DOI: 10.1021/jacs.3c10578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
Here we unveil a chiral molecular redox switch derived from PDI-based twistacenes─chPDI[2] that has the remarkable attributes of high-intensity and a broadband chiral response. This material exhibits facile, stable, and reversible multistate chiroptical switching behavior over a broad active wavelength range close to 700 nm, encompassing ultraviolet, visible, and near-infrared regions. Upon reduction, chPDI[2] exhibits a substantial increase in the amplitude of its circular dichroic response, with an outstanding |ΔΔε| > 300 M-1 cm-1 and a high dissymmetry factor of 3 × 10-2 at 960 nm. DFT calculations suggest that the long wavelength CD signal for doubly reduced chPDI[2] originates from excitation of the PDI backbone to the π* orbital of the bridging alkene. Importantly, the dimer's molecular contortion facilitates ionic diffusion, enabling chiral switching in solid state films. The high dissymmetry factors and near-infrared response establish chPDI[2] as a unique chiroptic switch.
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Affiliation(s)
- Si Tong Bao
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Shayan Louie
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Haoyu Jiang
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Qifeng Jiang
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Shantao Sun
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Michael L Steigerwald
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Colin Nuckolls
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Zexin Jin
- Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang 310030, China
- School of Engineering, Westlake University, Hangzhou, Zhejiang 310030, China
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6
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Báti G, Csókás D, Stuparu MC. Mechanochemical Scholl Reaction on Phenylated Cyclopentadiene Core: One-Step Synthesis of Fluoreno[5]helicenes. Chemistry 2024; 30:e202302971. [PMID: 37870299 DOI: 10.1002/chem.202302971] [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: 09/13/2023] [Revised: 10/16/2023] [Accepted: 10/23/2023] [Indexed: 10/24/2023]
Abstract
In this study, we explore feasibility of the mechanochemical approach in the synthesis of tetrabenzofluorenes (fluoreno[5]helicenes). For this, commercially available phenylated cyclopentadiene precursors are subjected to the Scholl reaction in the solid state using FeCl3 as an oxidant and sodium chloride as the solid reaction medium. This ball milling process gave access to the 5-membered ring containing-helicenes in one synthetic step in high (95-96 %) isolated yields. The solution-phase reactions, however, were found to be moderate to low yielding in this regard (10-40 %).
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Affiliation(s)
- Gábor Báti
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore, Singapore
| | - Dániel Csókás
- Institute of Organic Chemistry, Research Centre for Natural Sciences, Magyar tudósok körútja 2, 1117, Budapest, Hungary
| | - Mihaiela C Stuparu
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore, Singapore
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7
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Guy L, Mosser M, Pitrat D, Mulatier JC, Kukułka M, Srebro-Hooper M, Jeanneau E, Bensalah-Ledoux A, Baguenard B, Guy S. Acid/Base-Triggered Photophysical and Chiroptical Switching in a Series of Helicenoid Compounds. Molecules 2023; 28:7322. [PMID: 37959742 PMCID: PMC10647711 DOI: 10.3390/molecules28217322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 10/21/2023] [Accepted: 10/23/2023] [Indexed: 11/15/2023] Open
Abstract
A series of molecules that possess two quinolines, benzoquinolines, or phenanthrolines connected in a chiral fashion by a biaryl junction along with their water-soluble derivatives was developed and characterized. The influence of the structure on the basicity of the nitrogen atoms in two heterocycles was examined and the photophysical and chiroptical switching activity of the compounds upon protonation was studied both experimentally and computationally. The results demonstrated that changes in the electronic structure of the protonated vs. neutral species, promoting a bathochromic shift of dominant electronic transitions and alternation of their character from π-to-π* to charge-transfer-type, when additionally accompanied by the high structural flexibility of a system, leading to changes in conformational preferences upon proton binding, produce particularly pronounced modifications of the spectral properties in acidic medium. The latter combined with reversibility of the read-out make some of the molecules in this series very promising multifunctional pH probes.
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Affiliation(s)
- Laure Guy
- Laboratoire de Chimie UMR 5182, Université Lyon, ENS de Lyon, CNRS, F-69342 Lyon, France; (M.M.); (D.P.); (J.-C.M.)
| | - Maëlle Mosser
- Laboratoire de Chimie UMR 5182, Université Lyon, ENS de Lyon, CNRS, F-69342 Lyon, France; (M.M.); (D.P.); (J.-C.M.)
| | - Delphine Pitrat
- Laboratoire de Chimie UMR 5182, Université Lyon, ENS de Lyon, CNRS, F-69342 Lyon, France; (M.M.); (D.P.); (J.-C.M.)
| | - Jean-Christophe Mulatier
- Laboratoire de Chimie UMR 5182, Université Lyon, ENS de Lyon, CNRS, F-69342 Lyon, France; (M.M.); (D.P.); (J.-C.M.)
| | - Mercedes Kukułka
- Faculty of Chemistry, Jagiellonian University, 30-387 Krakow, Poland
| | | | - Erwann Jeanneau
- Centre de Diffractométrie Henri Longchambon, Université Claude Bernard Lyon 1, 5 Rue de la Doua, F-69100 Villeurbanne, France;
| | - Amina Bensalah-Ledoux
- Institut Lumière Matière UMR 5306, Université Lyon, CNRS, F-69622 Villeurbanne, France; (A.B.-L.); (B.B.); (S.G.)
| | - Bruno Baguenard
- Institut Lumière Matière UMR 5306, Université Lyon, CNRS, F-69622 Villeurbanne, France; (A.B.-L.); (B.B.); (S.G.)
| | - Stéphan Guy
- Institut Lumière Matière UMR 5306, Université Lyon, CNRS, F-69622 Villeurbanne, France; (A.B.-L.); (B.B.); (S.G.)
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8
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Zhao T, Wu W, Yang C. Chiroptical regulation of macrocyclic arenes with flipping-induced inversion of planar chirality. Chem Commun (Camb) 2023; 59:11469-11483. [PMID: 37691554 DOI: 10.1039/d3cc03829g] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2023]
Abstract
Studies on various macrocyclic arenes have received increasing attention due to their straightforward syntheses, convenient derivatization, and unique complexation properties. Represented by pillar[n]arenes, several distinctive macrocyclic arenes have recently emerged with the following characteristics: they possess a pair of enantiomeric planar chiral conformations, and interconversion between these enantiomeric conformations can be achieved through the flipping of ring units. Complexation of a chiral guest with these macrocyclic arenes will lead to a shift of the equilibrium between the Rp and Sp conformers, leading to intriguing possibilities for chiral induction and sensing. By the introduction of bulky substituents on the rims, employing rotaxanation or pseudocatenation, planar chirality could be locked, enabling the enantiomeric separation of the chiral structures. The induced or separated chiral conformers/compounds exhibit significant chiroptical properties. These macrocyclic arenes, with flipping-induced inversion of planar chirality, demonstrated intriguing chiral induction dynamics and kinetics. In this featured review, we systematically summarize the progress in chiroptical induction/regulation of these macrocyclic arenes, particularly in the fields of chiral sensing, molecular machines, molecular recognition, and assembly.
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Affiliation(s)
- Ting Zhao
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry Institution, Sichuan University Chengdu, Chengdu 610064, China.
| | - Wanhua Wu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry Institution, Sichuan University Chengdu, Chengdu 610064, China.
| | - Cheng Yang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry Institution, Sichuan University Chengdu, Chengdu 610064, China.
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9
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Full J, Wildervanck MJ, Dillmann C, Panchal SP, Volland D, Full F, Meerholz K, Nowak-Król A. Impact of Truncation on Optoelectronic Properties of Azaborole Helicenes. Chemistry 2023:e202302808. [PMID: 37651165 DOI: 10.1002/chem.202302808] [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: 08/29/2023] [Revised: 08/31/2023] [Accepted: 08/31/2023] [Indexed: 09/01/2023]
Abstract
Herein, we report configurationally stable singly-truncated (ST) and structurally flexible doubly-truncated (DT) helically chiral compounds derived from azabora[7]helicenes by a hypothetical removal of a single or two C=C double bonds. The singly-truncated constitutional isomers were synthesized from either benzoisoquinoline (BIQ) or phenantherene building blocks and the corresponding biaryls in excellent yields to give azabora[5]helicenes with a pendant phenyl ring at a sterically hindered position. These systems highlight the electronic impact of the nitrogen donor substitution position. The compounds with a disrupted BIQ moiety (STN) possess remarkable photoluminescence quantum yields of up to 0.53 in the solid state and a blue emission in solution with dissymmetry factors of up to ca. 3×10-3 . Upon cooling to 79 K all compounds exhibit phosphorescence with lifetimes of up to ca. 0.5 s. A methyl complex of azabora[7]helicene showing excellent configurational stability was used as a chiral inducer embedded in an emissive polymer (F8BT) to produce circularly polarized organic light emitting diodes with an electroluminescence dissymmetry factor gEL of up to 0.54.
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Affiliation(s)
- Julian Full
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
- Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Martijn J Wildervanck
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
- Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Claudia Dillmann
- Department of Chemistry, University of Cologne, Greinstr. 4-6, 50939, Köln, Germany
| | - Santosh P Panchal
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
- Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Daniel Volland
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
- Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Felix Full
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
- Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Klaus Meerholz
- Department of Chemistry, University of Cologne, Greinstr. 4-6, 50939, Köln, Germany
| | - Agnieszka Nowak-Król
- Institut für Anorganische Chemie and Institute for Sustainable Chemistry & Catalysis with Boron, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
- Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
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10
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Kundu D, Del Rio N, Cordier M, Vanthuyne N, Puttock EV, Meskers SCJ, Williams JAG, Srebro-Hooper M, Crassous J. Enantiopure cycloplatinated pentahelicenic N-heterocyclic carbenic complexes that display long-lived circularly polarized phosphorescence. Dalton Trans 2023; 52:6484-6493. [PMID: 37096384 DOI: 10.1039/d3dt00577a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2023]
Abstract
The preparation of the first enantiopure cycloplatinated complexes bearing a bidentate, helicenic N-heterocyclic carbene and a diketonate ancillary ligand is presented, along with their structural and spectroscopic characterization based on both experimental and computational studies. The systems exhibit long-lived circularly polarized phosphorescence in solution and in doped films at room temperature, and also in a frozen glass at 77 K, with dissymmetry factor glum values ≥10-3 in the former and around 10-2 in the latter.
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Affiliation(s)
- Debsouri Kundu
- Université de Rennes, CNRS, ISCR - UMR 6226, 35000 Rennes, France.
| | - Natalia Del Rio
- Université de Rennes, CNRS, ISCR - UMR 6226, 35000 Rennes, France.
| | - Marie Cordier
- Université de Rennes, CNRS, ISCR - UMR 6226, 35000 Rennes, France.
| | - Nicolas Vanthuyne
- Aix Marseille University, CNRS Centrale Marseille, iSm2, 13284 Marseille, France
| | - Emma V Puttock
- Department of Chemistry, Durham University, Durham DH1 3LE, UK.
| | - Stefan C J Meskers
- Molecular Materials and Nanosystems and Institute for Complex Molecular Systems, Technische Universiteit Eindhoven, NL 5600, The Netherlands
| | | | - Monika Srebro-Hooper
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland.
| | - Jeanne Crassous
- Université de Rennes, CNRS, ISCR - UMR 6226, 35000 Rennes, France.
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11
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Olea Ulloa C, Guajardo-Maturana R, Muñoz-Castro A. On the Cation-π capabilities of infinitene (∞). Evaluation of bonding and circular dichroism properties for Infinitene-Ag(I)n (n = 1–4) complexes from relativistic DFT calculations. Polyhedron 2023. [DOI: 10.1016/j.poly.2023.116323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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12
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Olea Ulloa C, Muñoz-Castro A. Infinitene as two fused helicoidal trails of fused rings: evaluation of the magnetic behavior of [12]infinitene and anionic species displaying global aromaticity and antiaromaticity. Phys Chem Chem Phys 2023; 25:8190-8197. [PMID: 36880673 DOI: 10.1039/d2cp06039f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
The unique formation of an infinity-shaped carbon backbone made exclusively from fused benzene rings has recently been achieved. The structure of [12]infinitene can be viewed as two fused [6]helicene structures with a central crossover section, depicting a global aromatic behavior along with the overall structure, with deshielding regions along both helicoidal axes. In addition, the 13C-NMR characteristics are discussed. The formation of a cumulative region involving the shielding regions from the aromatic rings is depicted along with the overall aesthetically pleasant structural backbone, which is enhanced at the crossover section. For the evaluated dianionic counterpart, the structure shows a deshielding region above the fused-ring trail and a helicoidal shielding region, ascribed to a global antiaromatic counterpart. The aromaticity is recovered and enhanced at the tetranionic state. Thus, the neutral and tetranionic states are able to build up a long-ranged shielding region, given by the global aromatic behavior, with an enhanced shielding region at the center of the crossover section displaying π-π stacked rings.
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Affiliation(s)
- Carolina Olea Ulloa
- Carrera de Química y Farmacia, Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Pedro de Valdivia 425, Providencia, Santiago, Chile
| | - Alvaro Muñoz-Castro
- Facultad de Ingeniería, Arquitectura y Diseño, Universidad San Sebastián, Bellavista 7, Santiago, 8420524, Chile.
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13
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Coordination Versatility of NHC-metal Topologies in Asymmetric Catalysis: Synthetic Insights and Recent Trends. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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14
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Rushworth J, Thawani AR, Fajardo-Ruiz E, Meiring JCM, Heise C, White AJP, Akhmanova A, Brandt JR, Thorn-Seshold O, Fuchter MJ. [5]-Helistatins: Tubulin-Binding Helicenes with Antimitotic Activity. JACS AU 2022; 2:2561-2570. [PMID: 36465552 PMCID: PMC9709948 DOI: 10.1021/jacsau.2c00435] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 10/06/2022] [Accepted: 10/06/2022] [Indexed: 06/17/2023]
Abstract
Helicenes are high interest synthetic targets with unique conjugated helical structures that have found important technological applications. Despite this interest, helicenes have had limited impact in chemical biology. Herein, we disclose a first-in-class antimitotic helicene, helistatin 1 (HA-1), where the helicene scaffold acts as a structural mimic of colchicine, a known antimitotic drug. The synthesis proceeds via sequential Pd-catalyzed coupling reactions and a π-Lewis acid cycloisomerization mediated by PtCl2. HA-1 was found to block microtubule polymerization in both cell-free and live cell assays. Not only does this demonstrate the feasibility of using helicenes as bioactive scaffolds against protein targets, but also suggests wider potential for the use of helicenes as isosteres of biaryls or cis-stilbenes-themselves common drug and natural product scaffolds. Overall, this study further supports future opportunities for helicenes for a range of chemical biological applications.
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Affiliation(s)
- James
L. Rushworth
- Department
of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, 82 Wood Lane, London W12 OBZ, U.K.
| | - Aditya R. Thawani
- Department
of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, 82 Wood Lane, London W12 OBZ, U.K.
| | - Elena Fajardo-Ruiz
- Department
of Pharmacy, Ludwig-Maximilians University
of Munich, Munich 81377, Germany
| | - Joyce C. M. Meiring
- Cell
Biology, Neurobiology and Biophysics, Department of Biology, Faculty
of Science, Utrecht University, Utrecht 3584 CH, Netherlands
| | - Constanze Heise
- Department
of Pharmacy, Ludwig-Maximilians University
of Munich, Munich 81377, Germany
| | - Andrew J. P. White
- Department
of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, 82 Wood Lane, London W12 OBZ, U.K.
| | - Anna Akhmanova
- Cell
Biology, Neurobiology and Biophysics, Department of Biology, Faculty
of Science, Utrecht University, Utrecht 3584 CH, Netherlands
| | - Jochen R. Brandt
- Department
of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, 82 Wood Lane, London W12 OBZ, U.K.
| | - Oliver Thorn-Seshold
- Department
of Pharmacy, Ludwig-Maximilians University
of Munich, Munich 81377, Germany
| | - Matthew J. Fuchter
- Department
of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City Campus, 82 Wood Lane, London W12 OBZ, U.K.
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15
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Xiao X, Cheng Q, Bao ST, Jin Z, Sun S, Jiang H, Steigerwald ML, Nuckolls C. Single-Handed Helicene Nanoribbons via Transfer of Chiral Information. J Am Chem Soc 2022; 144:20214-20220. [DOI: 10.1021/jacs.2c09288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Xiao Xiao
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Qian Cheng
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Si Tong Bao
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Zexin Jin
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Shantao Sun
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Haoyu Jiang
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | | | - Colin Nuckolls
- Department of Chemistry, Columbia University, New York, New York 10027, United States
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16
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Wang C, Liu L, Wang J, Yan Y. Electrochemically Switchable Circularly Polarized Photoluminescence within Self-Assembled Conducting Polymer Helical Microfibers. J Am Chem Soc 2022; 144:19714-19718. [PMID: 36260365 DOI: 10.1021/jacs.2c10023] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Achieving electrically and/or electrochemically controlled circularly polarized photoluminescence (CPL) is challenging due to the non-electroactive characteristics of most chiral materials and the non-electrosensitive feature of materials' chiroptical signals. Here we found that the CPL of self-assembled conducting polyaniline (PANI) helical microfibers could be reversibly switched by applying an alternating electrical bias. The conducting polymer is not the fluorophore but can transfer its chirality to the coassembled aggregation-induced emission (AIE) fluorescent molecules. The electrochemically switchable CPL is derived from the reversible transformation of the chirality of the polyaniline microfibers, which is probably due to the change in the molecular interchain distance upon doping/dedoping. Subsequently, we have demonstrated double-layer information encryption based on the electrochemically reversible CPL and conductance.
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Affiliation(s)
- Chenchen Wang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lin Liu
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jingyu Wang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yong Yan
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China.,University of Chinese Academy of Sciences, Beijing 100049, China.,School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing 100083, China
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17
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Stimuli-responsive chirality inversion of metallohelices and related dynamic metal complexes. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214582] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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18
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van de Griend C, van de Vijver JJ, Siegler MA, Dame RT, Bonnet S. Ruthenium-Locked Helical Chirality: A Barrier of Inversion and Formation of an Asymmetric Macrocycle. Inorg Chem 2022; 61:16045-16054. [PMID: 36171738 PMCID: PMC9554910 DOI: 10.1021/acs.inorgchem.2c02447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Upon coordination to metal centers, tetradentate ligands
based
on the 6,6′-bis(2″-aminopyridyl)-2,2′-bipyridine
(bapbpy) structure form helical chiral complexes due to the steric
clash between the terminal pyridines of the ligand. For octahedral
ruthenium(II) complexes, the two additional axial ligands bound to
the metal center, when different, generate diastereotopic aromatic
protons that can be distinguished by NMR. Based on these geometrical
features, the inversion barrier of helical [RuII(L)(RR′SO)Cl]+ complexes, where L is a sterically hindered bapbpy derivative
and RR′SO is a chiral or achiral sulfoxide ligand, was studied
by variable-temperature 1H NMR. The coalescence energies
for the inversion of the helical chirality of [Ru(bapbpy)(DMSO)(Cl)]Cl
and [Ru(bapbpy)(MTSO)(Cl)]Cl (where MTSO is (R)-methyl p-tolylsulfoxide) were found to be 43 and 44 kJ/mol, respectively.
By contrast, in [Ru(biqbpy)(DMSO)(Cl)]Cl (biqbpy = 6,6′-bis(aminoquinolyl)-2,2′-bipyridine),
increased strain caused by the larger terminal quinoline groups resulted
in a coalescence temperature higher than 376 K, which pointed to an
absence of helical chirality inversion at room temperature. Further
increasing the steric strain by introducing methoxy groups ortho to
the nitrogen atoms of the terminal pyridyl groups in bapbpy resulted
in the serendipitous discovery of a ring-closing reaction that took
place upon trying to make [Ru(OMe-bapbpy)(DMSO)Cl]+ (OMe-bapbpy
= 6,6′-bis(6-methoxy-aminopyridyl)-2,2′-bipyridine).
This reaction generated, in excellent yields, a chiral complex [Ru(L″)(DMSO)Cl]Cl,
where L″ is an asymmetric tetrapyridyl macrocycle. This unexpected
transformation appears to be specific to ruthenium(II) as macrocyclization
did not occur upon coordination of the same ligand to palladium(II)
or rhodium(III). Ruthenium
complexes based on the bapbpy ligand form helical
chiral complexes due to the steric clash between their terminal pyridyl
groups. The coalescence energy for the inversion of this helical chirality
was 43 kJ/mol according to variable temperature NMR. Increasing the
steric strain by replacing terminal pyridyl groups with quinolyl groups
blocked helical interconversion, while introducing ortho-methoxy groups resulted in an unexpected ring-closing reaction,
forming a dissymmetric macrocycle bound to ruthenium in excellent
yields.
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Affiliation(s)
- Corjan van de Griend
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, Leiden 2333CC, The Netherlands
| | - Johannes J van de Vijver
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, Leiden 2333CC, The Netherlands
| | - Maxime A Siegler
- Small molecule X-ray facility, Department of Chemistry, John Hopkins University, Baltimore, Maryland 21218, United States
| | - Remus T Dame
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, Leiden 2333CC, The Netherlands
| | - Sylvestre Bonnet
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, Leiden 2333CC, The Netherlands
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19
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Yang W, Shen J. Multiple Heterohelicenes: Synthesis, Properties and Applications**. Chemistry 2022; 28:e202202069. [DOI: 10.1002/chem.202202069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Indexed: 11/05/2022]
Affiliation(s)
- Wen‐Wen Yang
- School of the Environment and Safety Engineering Jiangsu University Zhenjiang 212013 Jiangsu P. R. China
| | - Jun‐Jian Shen
- School of the Environment and Safety Engineering Jiangsu University Zhenjiang 212013 Jiangsu P. R. China
- Institute of Environmental Health and Ecological Security Jiangsu University Zhenjiang 212013 Jiangsu P. R. China
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20
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Gulevskaya AV, Tonkoglazova DI. Alkyne‐based syntheses of carbo‐ and heterohelicenes. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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21
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Váňa L, Jakubec M, Sýkora J, Císařová I, Žádný J, Storch J, Církva V. Synthesis of Aza[ n]helicenes ( n = 4-7) via Photocyclodehydrochlorination of 1-Chloro- N-aryl-2-naphthamides. J Org Chem 2022; 87:7150-7166. [PMID: 35549349 DOI: 10.1021/acs.joc.2c00375] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A series of aza[n]helicenes (n = 4-7) was synthesized using a photocyclodehydrochlorination of 1-chloro-N-aryl-2-naphthamides as a general synthetic procedure introducing the nitrogen atom to the third ring of the helicene framework. The effect of the nitrogen presence in the helicene skeleton on the physicochemical properties of the prepared aza[n]helicenes was studied and compared to those of the parent carbo-analogues. The insertion of a nitrogen atom into the outer edge of the helicene molecule has a severe impact on certain physicochemical properties such as optical rotation, electrostatic potentials, and intermolecular interactions. On the other hand, some other properties such as UV/vis, fluorescence, and phosphorescence spectra remained almost unaffected when compared to the parent carbohelicenes. A nitrogen atom can be also used for further derivatization, which can lead to further modification of helicene properties, as manifested here in the fluorescence changes induced by protonation.
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Affiliation(s)
| | | | | | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 128 40 Prague 2, Czech Republic
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22
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Balahoju SA, Maurya YK, Chmielewski PJ, Lis T, Kondratowicz M, Cybińska J, Stępień M. Helicity Modulation in NIR-Absorbing Porphyrin-Ryleneimides. Angew Chem Int Ed Engl 2022; 61:e202200781. [PMID: 35130373 PMCID: PMC9303407 DOI: 10.1002/anie.202200781] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Indexed: 11/17/2022]
Abstract
Peripheral substitution of a π‐extended porphyrin with bulky groups produces a curved chromophore with four helical stereogenic units. The curvature and stereochemistry of such porphyrins can be controlled by varying the substituents, coordinated metal ions, and apical ligands. In particular, when the achiral saddle‐shaped free bases are treated with large metal ions, i.e., CdII or HgII, the resulting complexes convert to chiral propeller‐like configurations. X‐ray diffraction analyses show that apical coordination of a water molecule is sufficient to induce a notable bowl‐like distortion of the cadmium complex, which however retains its chiral structure. For phenyl‐ and tolyl‐substituted derivatives, the conversion is thermodynamically controlled, whereas complexes bearing bulky 4‐(tert‐butyl)phenyl groups transform into their chiral forms upon heating. In the latter case, the chiral Hg porphyrin was converted into the corresponding free base and other metal complexes without any loss of configurational purity, ultimately providing access to stable, enantiopure porphyrin propellers.
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Affiliation(s)
| | - Yogesh Kumar Maurya
- Wydział Chemii, Uniwersytet Wrocławski, ul. F. Joliot-Curie 14, 50-383, Wrocław, Poland
| | - Piotr J Chmielewski
- Wydział Chemii, Uniwersytet Wrocławski, ul. F. Joliot-Curie 14, 50-383, Wrocław, Poland
| | - Tadeusz Lis
- Wydział Chemii, Uniwersytet Wrocławski, ul. F. Joliot-Curie 14, 50-383, Wrocław, Poland
| | - Mateusz Kondratowicz
- Wydział Chemii, Uniwersytet Wrocławski, ul. F. Joliot-Curie 14, 50-383, Wrocław, Poland
| | - Joanna Cybińska
- Wydział Chemii, Uniwersytet Wrocławski, ul. F. Joliot-Curie 14, 50-383, Wrocław, Poland.,(PORT) Polski Ośrodek Rozwoju Technologii, ul. Stabłowicka 147, 54-066, Wrocław, Poland
| | - Marcin Stępień
- Wydział Chemii, Uniwersytet Wrocławski, ul. F. Joliot-Curie 14, 50-383, Wrocław, Poland
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23
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Tonkoglazova DI, Oryabinskaya LM, Shcherbatykh AA, Gulevskaya AV. The synthesis and crystal structure of pH-sensitive fluorescent pyrene-based double aza- and diaza[4]helicenes. Org Biomol Chem 2022; 20:2704-2714. [PMID: 35293927 DOI: 10.1039/d2ob00204c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Novel pyrene-based double aza- and diaza[4]helicenes have been prepared through a five-step synthetic sequence in overall good yields. Commercially available 2,3-dihaloazines (2,3-dibromopyridine, 2,3-dichloropyrazine and 2,3-dichloroquinoxaline) were used as starting materials. The synthesis employs electrophile-induced cyclizations of ortho-alkynyl bihetaryls as the key steps, leading to the formation of a helical skeleton. To discern the effect of merging azine and pyrene moieties within a helical skeleton, the X-ray structures, UV-vis absorption and fluorescence spectra of the helicenes were investigated and compared with those of the parent [4]helicene, aza- and diaza[4]helicenes. It was found that the emission properties of the synthesized helicenes can be modulated as a function of pH. The basicity of pyrene-based double aza[4]helicenes was estimated by the direct fluorimetric titration method; the pKa value was found to be equal to 1.4.
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Affiliation(s)
- Daria I Tonkoglazova
- Department of Chemistry, Southern Federal University, Zorge str. 7, 344090 Rostov-on-Don, Russian Federation.
| | - Lyubov M Oryabinskaya
- Department of Chemistry, Southern Federal University, Zorge str. 7, 344090 Rostov-on-Don, Russian Federation.
| | - Aleksandr A Shcherbatykh
- Department of Chemistry, Southern Federal University, Zorge str. 7, 344090 Rostov-on-Don, Russian Federation.
| | - Anna V Gulevskaya
- Department of Chemistry, Southern Federal University, Zorge str. 7, 344090 Rostov-on-Don, Russian Federation.
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24
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Han SY, Mow RK, Bartholomew AK, Ng F, Steigerwald ML, Roy X, Nuckolls C, Wiscons RA. Broad-band Chiral Absorbance of Visible Light. J Am Chem Soc 2022; 144:5263-5267. [PMID: 35302759 DOI: 10.1021/jacs.2c01650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The amplification of chiral absorbance and emission is a primary figure of merit for the design of chiral chromophores. However, for dyes to be practically relevant in chiroptical applications, they must also absorb and/or emit chiral light over broad wavelength ranges. We investigate the interplay between molecular symmetry and broad-band chiral absorbance in a series of [6]helicenes. We find that an asymmetric [6]helicene containing two distinct chromophores absorbs chiral light across a much wider wavelength range than the symmetric [6]helicenes investigated here. Chemically reducing the helicenes shifts the absorption edge of the ECD spectra into the near-infrared wavelength range while preserving broad chiral absorption, producing a [6]helicene that absorbs a single handedness of light across the entire visible wavelength range.
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Affiliation(s)
- Sae Young Han
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Rachael K Mow
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | | | - Fay Ng
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Michael L Steigerwald
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Xavier Roy
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Colin Nuckolls
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Ren A Wiscons
- Department of Chemistry, Columbia University, New York, New York 10027, United States.,Department of Chemistry, Amherst College, Amherst, Massachusetts 01002, United States
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25
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Balahoju SA, Maurya YK, Chmielewski PJ, Lis T, Kondratowicz M, Cybińska J, Stępień M. Helicity Modulation in NIR‐Absorbing Porphyrin‐Ryleneimides. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202200781] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | - Yogesh Kumar Maurya
- Wydział Chemii Uniwersytet Wrocławski ul. F. Joliot-Curie 14 50-383 Wrocław Poland
| | - Piotr J. Chmielewski
- Wydział Chemii Uniwersytet Wrocławski ul. F. Joliot-Curie 14 50-383 Wrocław Poland
| | - Tadeusz Lis
- Wydział Chemii Uniwersytet Wrocławski ul. F. Joliot-Curie 14 50-383 Wrocław Poland
| | - Mateusz Kondratowicz
- Wydział Chemii Uniwersytet Wrocławski ul. F. Joliot-Curie 14 50-383 Wrocław Poland
| | - Joanna Cybińska
- Wydział Chemii Uniwersytet Wrocławski ul. F. Joliot-Curie 14 50-383 Wrocław Poland
- (PORT) Polski Ośrodek Rozwoju Technologii ul. Stabłowicka 147 54-066 Wrocław Poland
| | - Marcin Stępień
- Wydział Chemii Uniwersytet Wrocławski ul. F. Joliot-Curie 14 50-383 Wrocław Poland
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26
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Soni R, Soman SS. Metal free synthesis of Coumarin containing hetero[n]helicene like molecules with TICT and AIE propertie. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100770] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Rina Soni
- The Maharaja Sayajirao University of Baroda Faculty of Science Chemistry Sayajigunj 390002 Vadodara INDIA
| | - Shubhangi S Soman
- The Maharaja Sayajirao University of Baroda Faculty of Science Chemistry INDIA
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27
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Kuwahara Y, Ito M, Iwamoto T, Takafuji M, Ihara H, Ryu N, Mani T. Chemical redox-induced chiroptical switching of supramolecular assemblies of viologens. RSC Adv 2022; 12:2019-2025. [PMID: 35425216 PMCID: PMC8979179 DOI: 10.1039/d1ra08984f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Accepted: 01/03/2022] [Indexed: 01/24/2023] Open
Abstract
A chiral supramolecular assembly exhibiting redox-induced changes in its chiroptical properties was prepared using viologen-modified glutamide (G-V2+) derivatives. Achiral viologen moieties in the G-V2+ assembly were chirally orientated by glutamide groups, affording a unique orange-colored solution, with a visible absorption band at around 470 nm, having electronic circular dichroism (CD) signals (molar ellipticity [θ] = 0.58 × 105 deg cm2 dmol−1: absorption dissymmetry factors (g) = 5.2 × 10−3 at 512 nm). The G-V2+ could be reduced to its cation radical (G-V+˙) but retains its chiral assembly. After chemical reduction, the color change from orange to blueish violet, indicating an absorption band at approximately 560 nm, and the sign change of the CD signal from positive to negative ([θ] = −0.36 × 105 deg cm2 dmol−1; g = −2.9 × 10−3 at 580 nm) were observed in water. Subsequent oxidation re-introduces the G-V2+ chiroptical behavior before reduction. Chiral assemblies of viologen-modified glutamide derivatives exhibit a unique orange-color and CD signals by CT complexes of viologen groups and electro-responsive chiroptical switching behaviors in the visible region in water.![]()
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Affiliation(s)
- Yutaka Kuwahara
- Department of Applied Chemistry and Biochemistry, Kumamoto University 2-39-1 Kurokami, Chuo-ku Kumamoto 860-8555 Japan .,International Research Organization for Advanced Science and Technology (IROAST), Kumamoto University 2-39-1 Kurokami, Chuo-ku Kumamoto 860-8555 Japan
| | - Mio Ito
- Department of Applied Chemistry and Biochemistry, Kumamoto University 2-39-1 Kurokami, Chuo-ku Kumamoto 860-8555 Japan
| | - Tatsumi Iwamoto
- Department of Applied Chemistry and Biochemistry, Kumamoto University 2-39-1 Kurokami, Chuo-ku Kumamoto 860-8555 Japan
| | - Makoto Takafuji
- Department of Applied Chemistry and Biochemistry, Kumamoto University 2-39-1 Kurokami, Chuo-ku Kumamoto 860-8555 Japan .,International Research Organization for Advanced Science and Technology (IROAST), Kumamoto University 2-39-1 Kurokami, Chuo-ku Kumamoto 860-8555 Japan
| | - Hirotaka Ihara
- Department of Applied Chemistry and Biochemistry, Kumamoto University 2-39-1 Kurokami, Chuo-ku Kumamoto 860-8555 Japan .,National Institute of Technology, Okinawa College 905 Henoko, Nago Okinawa 905-2192 Japan
| | - Naoya Ryu
- Materials Development Department, Kumamoto Industrial Research Institute 3-11-38 Higashimachi Higashi-ku Kumamoto 862-0901 Japan
| | - Tomoyasu Mani
- Department of Chemistry, University of Connecticut 55 N. Eagleville Rd Storrs CT 06269-3060 USA
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28
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Iba S, Iwata K, Sotani T, Ishida T, Sano N, Sogawa H, Sanda F. Photo-Triggered Chiroptical Switching of Platinum Complexes Bearing Azobenzene Moieties. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00435] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Shinichi Iba
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka 564-8680, Japan
| | - Kohei Iwata
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka 564-8680, Japan
| | - Taichi Sotani
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka 564-8680, Japan
| | - Takahiro Ishida
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka 564-8680, Japan
| | - Natsuhiro Sano
- R&D Division, Nippon Chemical Industrial Co., Ltd., 9-11-1 Kameido, Koto-ku, Tokyo 136-8515, Japan
| | - Hiromitsu Sogawa
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka 564-8680, Japan
| | - Fumio Sanda
- Department of Chemistry and Materials Engineering, Faculty of Chemistry, Materials and Bioengineering, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka 564-8680, Japan
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29
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Tsurusaki A, Kamikawa K. Multiple Helicenes Featuring Synthetic Approaches and Molecular Structures. CHEM LETT 2021. [DOI: 10.1246/cl.210409] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Akihiro Tsurusaki
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Ken Kamikawa
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
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30
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Medel MA, Cruz CM, Miguel D, Blanco V, Morcillo SP, Campaña AG. Chiral Distorted Hexa-peri-hexabenzocoronenes Bearing a Nonagon-Embedded Carbohelicene. Angew Chem Int Ed Engl 2021; 60:22051-22056. [PMID: 34329498 PMCID: PMC8518755 DOI: 10.1002/anie.202109310] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Indexed: 01/29/2023]
Abstract
A new family of chiral saddle-helix hybrid nanographenes is reported. The first hexa-peri-hexabenzocoronene (HBC) analogues bearing a nine-membered carbocycle are presented. Furthermore, for the first time, π-extended carbo[n]helicenes containing a nine-membered ring as part of the helical moiety have been synthesized. The combination of a [5]helicene moiety and a nonagon ring in a single chiral motif induces a tremendous distortion from planarity into the nanographenic structures compared to other saddle-helix hybrids such as heptagon- and octagon-containing π-extended carbo[5]helicenes. In fact, the interplanar angle of the two terminal rings reaches the largest angle (134.8°) of a carbohelicene reported to date, thus being by far the most twisted helicene yet prepared. Photophysical properties evaluation showed improved absorption dissymmetry factors (|gabs |=4.2×10-3 ) in the new family of nonagon-containing π-extended carbo[5]helicenes.
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Affiliation(s)
- Miguel A. Medel
- Departamento de Química OrgánicaUnidad de Excelencia de Química (UEQ)Facultad de CienciasUniversidad de Granada18071GranadaSpain
| | - Carlos M. Cruz
- Department of ChemistryFaculty of ScienceUniversity of ZurichWinterthurerstrasse 1908057ZurichSwitzerland
| | - Delia Miguel
- Departamento de FisicoquímicaFacultad de Farmacia, UEQUniversidad de Granada18071GranadaSpain
| | - Victor Blanco
- Departamento de Química OrgánicaUnidad de Excelencia de Química (UEQ)Facultad de CienciasUniversidad de Granada18071GranadaSpain
| | - Sara P. Morcillo
- Departamento de Química OrgánicaUnidad de Excelencia de Química (UEQ)Facultad de CienciasUniversidad de Granada18071GranadaSpain
| | - Araceli G. Campaña
- Departamento de Química OrgánicaUnidad de Excelencia de Química (UEQ)Facultad de CienciasUniversidad de Granada18071GranadaSpain
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31
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Medel MA, Cruz CM, Miguel D, Blanco V, Morcillo SP, Campaña AG. Chiral Distorted Hexa‐
peri
‐hexabenzocoronenes Bearing a Nonagon‐Embedded Carbohelicene. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Miguel A. Medel
- Departamento de Química Orgánica Unidad de Excelencia de Química (UEQ) Facultad de Ciencias Universidad de Granada 18071 Granada Spain
| | - Carlos M. Cruz
- Department of Chemistry Faculty of Science University of Zurich Winterthurerstrasse 190 8057 Zurich Switzerland
| | - Delia Miguel
- Departamento de Fisicoquímica Facultad de Farmacia, UEQ Universidad de Granada 18071 Granada Spain
| | - Victor Blanco
- Departamento de Química Orgánica Unidad de Excelencia de Química (UEQ) Facultad de Ciencias Universidad de Granada 18071 Granada Spain
| | - Sara P. Morcillo
- Departamento de Química Orgánica Unidad de Excelencia de Química (UEQ) Facultad de Ciencias Universidad de Granada 18071 Granada Spain
| | - Araceli G. Campaña
- Departamento de Química Orgánica Unidad de Excelencia de Química (UEQ) Facultad de Ciencias Universidad de Granada 18071 Granada Spain
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32
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Dekkiche H, Malinčik J, Prescimone A, Häussinger D, Mayor M. An Ortho-Tetraphenylene-Based "Geländer" Architecture Consisting Exclusively of 52 sp 2 -Hybridized C Atoms. Chemistry 2021; 27:13258-13267. [PMID: 34254710 PMCID: PMC8518721 DOI: 10.1002/chem.202101968] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Indexed: 11/28/2022]
Abstract
A new type of "Geländer" molecule based on a ortho-tetraphenylene core is presented. The central para-quaterphenyl backbone is wrapped by a 4,4'-di((Z)-styryl)-1,1'-biphenyl banister, with its aryl rings covalently attached to all four phenyl rings of the backbone. The resulting helical chiral bicyclic architecture consists exclusively of sp2 -hybridized carbon atoms. The target structure was assembled by expanding the central ortho-tetraphenylene subunit with the required additional phenyl rings followed by a twofold macrocyclization. The first macrocyclization attempts based on a twofold McMurry coupling were successful but low yielding; the second strategy, profiting from olefin metathesis, provided satisfying yields. Hydrogenation of the olefins resulted in a saturated derivative of similar topology, thereby allowing the interdependence between saturation and physico-chemical properties to be studied. The target structures, including their solid-state structures, were fully characterized. The helical chiral bicycle was synthesized as a racemate and separated into pure enantiomers by HPLC on a chiral stationary phase. Comparison of recorded and simulated chiroptical properties allowed the enantiomers to be assigned.
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Affiliation(s)
- Hervé Dekkiche
- Department of ChemistryUniversity of BaselSt. Johanns-Ring 194056BaselSwitzerland
- NCCR Molecular Systems EngineeringBPR 1095Mattenstrasse 24a4058BaselSwitzerland
| | - Juraj Malinčik
- Department of ChemistryUniversity of BaselSt. Johanns-Ring 194056BaselSwitzerland
| | | | - Daniel Häussinger
- Department of ChemistryUniversity of BaselSt. Johanns-Ring 194056BaselSwitzerland
| | - Marcel Mayor
- Department of ChemistryUniversity of BaselSt. Johanns-Ring 194056BaselSwitzerland
- NCCR Molecular Systems EngineeringBPR 1095Mattenstrasse 24a4058BaselSwitzerland
- Institute for Nanotechnology (INT)Karlsruhe Institute of Technology (KIT)P. O. Box 364076021KarlsruheGermany
- Lehn Institute of Functional Materials (LIFM)School of ChemistrySun Yat-Sen University (SYSU)Guangzhou510275 (P.R. ofChina
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33
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Gauthier ES, Cordier M, Dorcet V, Vanthuyne N, Favereau L, Williams JAG, Crassous J. Helically Chiral NHC‐Gold(I) Complexes: Synthesis, Chiroptical Properties and Electronic Features of the [5]Helicene‐Imidazolylidene Ligand. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100722] [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)
| | - Marie Cordier
- Univ Rennes CNRS, ISCR – UMR 6226 35000 Rennes France
| | | | - Nicolas Vanthuyne
- Aix Marseille University CNRS Centrale Marseille, iSm2 13284 Marseille France
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34
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Reger D, Haines P, Amsharov KY, Schmidt JA, Ullrich T, Bönisch S, Hampel F, Görling A, Nelson J, Jelfs KE, Guldi DM, Jux N. A Family of Superhelicenes: Easily Tunable, Chiral Nanographenes by Merging Helicity with Planar π Systems. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202103253] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- David Reger
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander-University Erlangen-Nuremberg Nikolaus-Fiebiger-Straße 10 91058 Erlangen Germany
| | - Philipp Haines
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander-University Erlangen-Nuremberg Egerlandstraße 3 91058 Erlangen Germany
| | - Konstantin Y. Amsharov
- Institute for Organic Chemistry Martin Luther University Halle-Wittenberg Kurt-Mothes-Straße 2 06120 Halle Germany
| | - Julia A. Schmidt
- Department of Chemistry Molecular Sciences Research Hub Imperial College London White City Campus, Wood Lane London W12 0BZ UK
| | - Tobias Ullrich
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander-University Erlangen-Nuremberg Egerlandstraße 3 91058 Erlangen Germany
| | - Simon Bönisch
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander-University Erlangen-Nuremberg Egerlandstraße 3 91058 Erlangen Germany
| | - Frank Hampel
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander-University Erlangen-Nuremberg Nikolaus-Fiebiger-Straße 10 91058 Erlangen Germany
| | - Andreas Görling
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander-University Erlangen-Nuremberg Egerlandstraße 3 91058 Erlangen Germany
| | - Jenny Nelson
- Department of Physics Imperial College London South Kensington Campus London SW7 2AZ UK
| | - Kim E. Jelfs
- Department of Chemistry Molecular Sciences Research Hub Imperial College London White City Campus, Wood Lane London W12 0BZ UK
| | - Dirk M. Guldi
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander-University Erlangen-Nuremberg Egerlandstraße 3 91058 Erlangen Germany
| | - Norbert Jux
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM) Friedrich-Alexander-University Erlangen-Nuremberg Nikolaus-Fiebiger-Straße 10 91058 Erlangen Germany
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35
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Reger D, Haines P, Amsharov KY, Schmidt JA, Ullrich T, Bönisch S, Hampel F, Görling A, Nelson J, Jelfs KE, Guldi DM, Jux N. A Family of Superhelicenes: Easily Tunable, Chiral Nanographenes by Merging Helicity with Planar π Systems. Angew Chem Int Ed Engl 2021; 60:18073-18081. [PMID: 34014601 PMCID: PMC8456895 DOI: 10.1002/anie.202103253] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 04/22/2021] [Indexed: 01/01/2023]
Abstract
We designed a straightforward synthetic route towards a full-fledged family of π-extended helicenes: superhelicenes. They have two hexa-peri-hexabenzocoronenes (HBCs) in common that are connected via a central five-membered ring. By means of structurally altering this 5-membered ring, we realized a versatile library of molecular building blocks. Not only the superhelicene structure, but also their features are tuned with ease. In-depth physico-chemical characterizations served as a proof of concept thereof. The superhelicene enantiomers were separated, their circular dichroism was measured in preliminary studies and concluded with an enantiomeric assignment. Our work was rounded-off by crystal structure analyses. Mixed stacks of M- and P-isomers led to twisted molecular wires. Using such stacks, charge-carrier mobilities were calculated, giving reason to expect outstanding hole transporting properties.
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Affiliation(s)
- David Reger
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-University Erlangen-NurembergNikolaus-Fiebiger-Straße 1091058ErlangenGermany
| | - Philipp Haines
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-University Erlangen-NurembergEgerlandstraße 391058ErlangenGermany
| | - Konstantin Y. Amsharov
- Institute for Organic ChemistryMartin Luther University Halle-WittenbergKurt-Mothes-Straße 206120HalleGermany
| | - Julia A. Schmidt
- Department of ChemistryMolecular Sciences Research HubImperial College LondonWhite City Campus, Wood LaneLondonW12 0BZUK
| | - Tobias Ullrich
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-University Erlangen-NurembergEgerlandstraße 391058ErlangenGermany
| | - Simon Bönisch
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-University Erlangen-NurembergEgerlandstraße 391058ErlangenGermany
| | - Frank Hampel
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-University Erlangen-NurembergNikolaus-Fiebiger-Straße 1091058ErlangenGermany
| | - Andreas Görling
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-University Erlangen-NurembergEgerlandstraße 391058ErlangenGermany
| | - Jenny Nelson
- Department of PhysicsImperial College LondonSouth Kensington CampusLondonSW7 2AZUK
| | - Kim E. Jelfs
- Department of ChemistryMolecular Sciences Research HubImperial College LondonWhite City Campus, Wood LaneLondonW12 0BZUK
| | - Dirk M. Guldi
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-University Erlangen-NurembergEgerlandstraße 391058ErlangenGermany
| | - Norbert Jux
- Department of Chemistry and Pharmacy & Interdisciplinary Center for Molecular Materials (ICMM)Friedrich-Alexander-University Erlangen-NurembergNikolaus-Fiebiger-Straße 1091058ErlangenGermany
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36
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Yen-Pon E, Buttard F, Frédéric L, Thuéry P, Taran F, Pieters G, Champagne PA, Audisio D. Heterohelicenes through 1,3-Dipolar Cycloaddition of Sydnones with Arynes: Synthesis, Origins of Selectivity, and Application to pH-Triggered Chiroptical Switch with CPL Sign Reversal. JACS AU 2021; 1:807-818. [PMID: 34467334 PMCID: PMC8395615 DOI: 10.1021/jacsau.1c00084] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Indexed: 05/25/2023]
Abstract
Regioselective access to heterohelicenes through the 1,3-dipolar cycloaddition of sydnones with arynes is described. Novel access to sydnones and poly(hetero)aromatic aryne precursors allowed the introduction of chemical diversity over multiple positions of the helical scaffolds. The origins of the unconventional regioselectivity during the cycloaddition steps was systematically investigated using density functional theory (DFT) calculations, unveiling the key features that control this reactivity, namely, face-to-face (π···π) or edge-to-face (C-H···π) interactions, primary orbital interactions and distortion from coplanarity in the transition structures (TSs) of the transformation. From the library of 24 derivatives synthesized, a pyridyl containing derivative displayed reversible, red-shifted, pH-triggered chiroptical switching properties, with CPL-sign reversal. It is found that protonation of the helicene causes a change of the angle between the electric and magnetic dipole moments related to the S1 → S0 transition, resulting in this rare case of reversible CPL sign inversion upon application of an external stimulus.
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Affiliation(s)
- Expédite Yen-Pon
- Université
Paris-Saclay, CEA, Service de Chimie Bio-organique et de Marquage,
DMTS, Gif-sur-Yvette 91191, France
| | - Floris Buttard
- Department
of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, New Jersey 07102, United States
| | - Lucas Frédéric
- Université
Paris-Saclay, CEA, Service de Chimie Bio-organique et de Marquage,
DMTS, Gif-sur-Yvette 91191, France
| | - Pierre Thuéry
- Université
Paris-Saclay, CEA, CNRS, NIMBE, Gif-sur-Yvette 91191, France
| | - Frédéric Taran
- Université
Paris-Saclay, CEA, Service de Chimie Bio-organique et de Marquage,
DMTS, Gif-sur-Yvette 91191, France
| | - Grégory Pieters
- Université
Paris-Saclay, CEA, Service de Chimie Bio-organique et de Marquage,
DMTS, Gif-sur-Yvette 91191, France
| | - Pier Alexandre Champagne
- Department
of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, New Jersey 07102, United States
| | - Davide Audisio
- Université
Paris-Saclay, CEA, Service de Chimie Bio-organique et de Marquage,
DMTS, Gif-sur-Yvette 91191, France
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37
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Terada N, Uematsu K, Higuchi R, Tokimaru Y, Sato Y, Nakano K, Nozaki K. Synthesis and Properties of Spiro-double Sila[7]helicene: The LUMO Spiro-conjugation. Chemistry 2021; 27:9342-9349. [PMID: 33834562 DOI: 10.1002/chem.202100385] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Indexed: 11/11/2022]
Abstract
A double helicene with a spiro-Si linker (4) was synthesized by four successive nucleophilic substitutions on SiCl4 . Its (P,P), (M,M) and (P,M) isomers were isolated and characterized by single crystal X-ray analysis. Due to the central spirosilabi[fluorene] moiety, the two helicene units in 4 are symmetrically and nearly perpendicularly arranged. (P,P)-4 and (M,M)-4 exhibit unique optical properties attributable to the LUMO spiro-conjugation between the two sila[7]helicene units.
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Affiliation(s)
- Nozomi Terada
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Keisuke Uematsu
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan
| | - Ryota Higuchi
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan
| | - Yuki Tokimaru
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Yosuke Sato
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Koji Nakano
- Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan
| | - Kyoko Nozaki
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
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38
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Pallova L, Gauthier ES, Abella L, Jean M, Vanthuyne N, Dorcet V, Vendier L, Autschbach J, Crassous J, Bastin S, César V. Synthesis and Properties of Partially Saturated Fluorenyl-Derived [n]Helicenes Featuring an Overcrowded Alkene. Chemistry 2021; 27:7722-7730. [PMID: 33780559 DOI: 10.1002/chem.202100150] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Indexed: 01/25/2023]
Abstract
The straightforward, multigram-scale synthesis of the partially saturated H6 -fluoreno[n]helicenes (n=5 or 7) featuring a central, overcrowded alkene is described. The key cyclization step was based on an intramolecular McMurry reaction from the corresponding 1,5-diketones. Chiral stationary phase HPLC analysis and isomer separation indicate that each helicenic compound is constituted of three diastereoisomers at room temperature, i. e. the configurationally stable (R,R,P)/(S,S,M) pair of enantiomers and an apparently achiral compound resulting from the rapid interconversion between the (R,S,P) and (S,R,M) enantiomers. The partially saturated H6 -fluoreno[n]helicenes are oxidatively aromatized to give an efficient access to the corresponding fluoreno[n]helicenes. The chiroptical properties (vibrational and electronic circular dichroism) of the chiral, enantiopure compounds have been measured and analyzed by quantum-chemical calculations, confirming their helicoidal nature.
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Affiliation(s)
- Lenka Pallova
- LCC-CNRS, Université de Toulouse, CNRS, 31077, Toulouse, France
| | - Etienne S Gauthier
- Institut des Sciences Chimiques de Rennes, UMR 6226, Institut de Physique de Rennes, UMR 6251, Campus de Beaulieu, CNRS-Université de Rennes 1, 35042, Rennes Cedex, France
| | - Laura Abella
- Department of chemistry, University at Buffalo - State University of New York, Buffalo, NY 14260, USA
| | - Marion Jean
- Aix Marseille university, CNRS, Centrale Marseille, Ism2, 13397, Marseille, France
| | - Nicolas Vanthuyne
- Aix Marseille university, CNRS, Centrale Marseille, Ism2, 13397, Marseille, France
| | - Vincent Dorcet
- Institut des Sciences Chimiques de Rennes, UMR 6226, Institut de Physique de Rennes, UMR 6251, Campus de Beaulieu, CNRS-Université de Rennes 1, 35042, Rennes Cedex, France
| | - Laure Vendier
- LCC-CNRS, Université de Toulouse, CNRS, 31077, Toulouse, France
| | - Jochen Autschbach
- Department of chemistry, University at Buffalo - State University of New York, Buffalo, NY 14260, USA
| | - Jeanne Crassous
- Institut des Sciences Chimiques de Rennes, UMR 6226, Institut de Physique de Rennes, UMR 6251, Campus de Beaulieu, CNRS-Université de Rennes 1, 35042, Rennes Cedex, France
| | | | - Vincent César
- LCC-CNRS, Université de Toulouse, CNRS, 31077, Toulouse, France
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39
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Taniguchi T, Nishii Y, Mori T, Nakayama KI, Miura M. Synthesis, Structure, and Chiroptical Properties of Indolo- and Pyridopyrrolo-Carbazole-Based C 2 -Symmetric Azahelicenes. Chemistry 2021; 27:7356-7361. [PMID: 33778999 DOI: 10.1002/chem.202100327] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Indexed: 12/14/2022]
Abstract
Treatment of 11,12-bis(1,1'-biphenyl-3-yl or 6-phenylpyridin-2-yl)-substituted 11,12-dihydro-indolo[2,3-a]carbazole with an oxidizing system of Pd(II)/Ag(I) induced effective double dehydrogenative cyclization to afford the corresponding π-extended azahelicenes. The optical resolutions were readily achieved by a preparative chiral HPLC. It was found that the pyridopyrrolo-carbazole-based azahelicene that contains four nitrogen atoms exhibits ca. 6 times larger dissymmetry factors both in circularly dichroism (CD) and circularly polarized luminescence (CPL), |gCD | and |gCPL | values being 1.1×10-2 and 4.4×10-3 , respectively, as compared with the parent indolocarbazole-based azahelicene. Theoretical calculations at the RI-CC2 level were employed to rationalize the observed enhanced chiroptical responses. The (chir)optical properties of the former helicene was further tuned by a protonation leading to remarkable red-shift with a considerable enhancement of the |gCPL | value.
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Affiliation(s)
- Taisei Taniguchi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Yuji Nishii
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Tadashi Mori
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Ken-Ichi Nakayama
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Masahiro Miura
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan
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40
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Tarrieu R, Delgado IH, Zinna F, Dorcet V, Colombel-Rouen S, Crévisy C, Baslé O, Bosson J, Lacour J. Hybrids of cationic [4]helicene and N-heterocyclic carbene as ligands for complexes exhibiting (chir)optical properties in the far red spectral window. Chem Commun (Camb) 2021; 57:3793-3796. [PMID: 33876124 DOI: 10.1039/d1cc00898f] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Synthesis, electronic and structural properties of a chiral NHC bearing a N-bonded cationic [4]helicene moiety are reported. This ligand is used to construct AuI, AuIII and RhI complexes exhibiting far-red (chir)optical properties regardless of the metal.
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Affiliation(s)
- Robert Tarrieu
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR - UMR 6226, Rennes F-35000, France.
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41
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Bosson J, Labrador GM, Besnard C, Jacquemin D, Lacour J. Chiral Near‐Infrared Fluorophores by Self‐Promoted Oxidative Coupling of Cationic Helicenes with Amines/Enamines. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016643] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Johann Bosson
- Department of Organic Chemistry University of Geneva Quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
| | - Geraldine M. Labrador
- Department of Organic Chemistry University of Geneva Quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
| | - Céline Besnard
- Laboratoire de Cristallographie University of Geneva Quai Ernest Ansermet 24 1211 Geneva 4 Switzerland
| | - Denis Jacquemin
- CEISAM UMR 6230 CNRS University of Nantes 44000 Nantes France
| | - Jérôme Lacour
- Department of Organic Chemistry University of Geneva Quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
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42
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Bosson J, Labrador GM, Besnard C, Jacquemin D, Lacour J. Chiral Near-Infrared Fluorophores by Self-Promoted Oxidative Coupling of Cationic Helicenes with Amines/Enamines. Angew Chem Int Ed Engl 2021; 60:8733-8738. [PMID: 33481294 DOI: 10.1002/anie.202016643] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 01/15/2021] [Indexed: 11/09/2022]
Abstract
In one pot, tertiary alkyl amines are oxidized to enamines by cationic dioxa[6]helicene, which further reacts as electrophile and oxidant to form mono or bis donor-π-acceptor coupling products. This original and convergent synthetic approach provides a strong extension of conjugation yielding chromophores that absorb intensively in far-red or NIR domains (λmax up to 791 nm) and fluoresce in the NIR as well (λmax up to 887 nm). Intense ECD properties around 790 nm with a |Δϵ| value up to 60 M-1 cm-1 are observed.
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Affiliation(s)
- Johann Bosson
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211, Geneva 4, Switzerland
| | - Geraldine M Labrador
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211, Geneva 4, Switzerland
| | - Céline Besnard
- Laboratoire de Cristallographie, University of Geneva, Quai Ernest Ansermet 24, 1211, Geneva 4, Switzerland
| | - Denis Jacquemin
- CEISAM UMR 6230, CNRS, University of Nantes, 44000, Nantes, France
| | - Jérôme Lacour
- Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, 1211, Geneva 4, Switzerland
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43
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Ikai T, Yamakawa S, Suzuki N, Yashima E. One-Step Simultaneous Synthesis of Circularly Polarized Luminescent Multiple Helicenes Using a Chrysene Framework. Chem Asian J 2021; 16:769-774. [PMID: 33449407 DOI: 10.1002/asia.202100035] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Indexed: 11/12/2022]
Abstract
A series of multiple helicenes was simultaneously synthesized in one step by intramolecular cyclization of a single chrysene derivative containing two 2-[(4-alkoxyphenyl)ethynyl]phenyl units accompanied by rearrangements of the aryl pendants. The electrophile-induced double cyclization with or without aryl migrations proceeded efficiently under acidic conditions to afford annulative π-extension of the chrysene units and produced quadruple (QH-2), triple (TH-2), and double (DH-2) helicenes containing [4]- and/or [5]helicene frameworks with dynamic and/or static helicene chirality in one step. Three multiple helicenes' structures were determined by X-ray crystallography and/or density functional theory calculations. The multiple TH-2 and DH-2 helicenes were separated into enantiomers because of the stable one and two [5]helicene moieties, respectively, and showed intense circular dichroism and circularly polarized luminescence. Although QH-2, which comprises four [4]helicene subunits, was not resolved into enantiomers, the TH-2 enantiomers were further separated into a pair of diastereomers at low temperature resulting from their substituted [4]helicene chirality.
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Affiliation(s)
- Tomoyuki Ikai
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya, 464-8603, Japan
| | - Shoya Yamakawa
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya, 464-8603, Japan
| | - Nozomu Suzuki
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya, 464-8603, Japan
| | - Eiji Yashima
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Chikusa-ku, Nagoya, 464-8603, Japan
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44
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Medel MA, Tapia R, Blanco V, Miguel D, Morcillo SP, Campaña AG. Octagon-Embedded Carbohelicene as a Chiral Motif for Circularly Polarized Luminescence Emission of Saddle-Helix Nanographenes. Angew Chem Int Ed Engl 2021; 60:6094-6100. [PMID: 33337575 DOI: 10.1002/anie.202015368] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Indexed: 12/17/2022]
Abstract
We report a new family of hexa-peri-hexabenzocoronene (HBC)-based helical nanographenes incorporating π-extended carbo[5]helicenes bearing an octagonal carbocycle. This family represents a new kind of highly distorted saddle-helix hybrid nanographenes. For the first time, the eight-membered ring becomes a constituent of both a carbo[5]helicene and a HBC and thus, the negative curvature is responsible for twisting both units. This novel chiral motif, namely, oct-[5]helicene results in the largest torsion angle recorded so far for a carbo[5]helicene (θ=79.5°), as it has been suggested by DFT-calculations and confirmed by X-ray crystallography. Consequently, the barriers of isomerization become exceptionally high for a [5]helicene unsubstituted in the fjord region since neither racemization nor decomposition were observed at 200 °C for 1 or 3 during 5 h. Therefore, racemic resolutions allowed subsequent chiroptical studies showing the ECD and CPL responses of this novel family of chiral nanographenes.
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Affiliation(s)
- Miguel A Medel
- Departamento de Química Orgánica, Unidad de Excelencia de Química (UEQ), Facultad de Ciencias, Universidad de Granada, 18071, Granada, Spain
| | - Rubén Tapia
- Departamento de Química Orgánica, Unidad de Excelencia de Química (UEQ), Facultad de Ciencias, Universidad de Granada, 18071, Granada, Spain
| | - Victor Blanco
- Departamento de Química Orgánica, Unidad de Excelencia de Química (UEQ), Facultad de Ciencias, Universidad de Granada, 18071, Granada, Spain
| | - Delia Miguel
- Departamento de Fisicoquímica, Facultad de Farmacia, UEQ, Universidad de Granada, Granada, Spain
| | - Sara P Morcillo
- Departamento de Química Orgánica, Unidad de Excelencia de Química (UEQ), Facultad de Ciencias, Universidad de Granada, 18071, Granada, Spain
| | - Araceli G Campaña
- Departamento de Química Orgánica, Unidad de Excelencia de Química (UEQ), Facultad de Ciencias, Universidad de Granada, 18071, Granada, Spain
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Medel MA, Tapia R, Blanco V, Miguel D, Morcillo SP, Campaña AG. Octagon‐Embedded Carbohelicene as a Chiral Motif for Circularly Polarized Luminescence Emission of Saddle‐Helix Nanographenes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015368] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Miguel A. Medel
- Departamento de Química Orgánica Unidad de Excelencia de Química (UEQ) Facultad de Ciencias Universidad de Granada 18071 Granada Spain
| | - Rubén Tapia
- Departamento de Química Orgánica Unidad de Excelencia de Química (UEQ) Facultad de Ciencias Universidad de Granada 18071 Granada Spain
| | - Victor Blanco
- Departamento de Química Orgánica Unidad de Excelencia de Química (UEQ) Facultad de Ciencias Universidad de Granada 18071 Granada Spain
| | - Delia Miguel
- Departamento de Fisicoquímica Facultad de Farmacia, UEQ Universidad de Granada Granada Spain
| | - Sara P. Morcillo
- Departamento de Química Orgánica Unidad de Excelencia de Química (UEQ) Facultad de Ciencias Universidad de Granada 18071 Granada Spain
| | - Araceli G. Campaña
- Departamento de Química Orgánica Unidad de Excelencia de Química (UEQ) Facultad de Ciencias Universidad de Granada 18071 Granada Spain
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46
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Alenaizan A, Fauché K, Krishnamurthy R, Sherrill CD. Noncovalent Helicene Structure between Nucleic Acids and Cyanuric Acid. Chemistry 2021; 27:4043-4052. [DOI: 10.1002/chem.202004390] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 11/08/2020] [Indexed: 12/16/2022]
Affiliation(s)
- Asem Alenaizan
- School of Chemistry and Biochemistry Georgia Institute of Technology Atlanta GA 30332-0400 USA
- Center for Computational Molecular Science and Technology Georgia Institute of Technology Atlanta GA 30332-0400 USA
- NSF-NASA Center for Chemical Evolution Atlanta GA 30332 USA
| | - Kévin Fauché
- NSF-NASA Center for Chemical Evolution Atlanta GA 30332 USA
- Department of Chemistry The Scripps Research Institute La Jolla CA 92037 USA
| | - Ramanarayanan Krishnamurthy
- NSF-NASA Center for Chemical Evolution Atlanta GA 30332 USA
- Department of Chemistry The Scripps Research Institute La Jolla CA 92037 USA
| | - C. David Sherrill
- School of Chemistry and Biochemistry Georgia Institute of Technology Atlanta GA 30332-0400 USA
- Center for Computational Molecular Science and Technology Georgia Institute of Technology Atlanta GA 30332-0400 USA
- NSF-NASA Center for Chemical Evolution Atlanta GA 30332 USA
- School of Computational Science and Engineering Georgia Institute of Technology Atlanta GA 30332-0765 USA
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47
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Tonkoglazova DI, Gulevskaya AV, Chistyakov KA, Askalepova OI. Synthesis, crystal structures and properties of carbazole-based [6]helicenes fused with an azine ring. Beilstein J Org Chem 2021; 17:11-21. [PMID: 33488827 PMCID: PMC7801798 DOI: 10.3762/bjoc.17.2] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 12/07/2020] [Indexed: 01/22/2023] Open
Abstract
Novel carbazole-based [6]helicenes fused with an azine ring (pyridine, pyrazine or quinoxaline) have been prepared through a five-step synthetic sequence in good overall yields. Commercially available 2,3-dihaloazines were used as starting materials. To discern the effect of merging an azine moiety within a helical skeleton, the X-ray structures, UV–vis absorption and fluorescence spectra of the helicenes were investigated and compared to that of the parent carbazole-based [6]helicene (7H-phenanthro[3,4-c]carbazole).
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Affiliation(s)
- Daria I Tonkoglazova
- Department of Chemistry, Southern Federal University, Zorge str., 7, Rostov-on-Don 344090, Russian Federation
| | - Anna V Gulevskaya
- Department of Chemistry, Southern Federal University, Zorge str., 7, Rostov-on-Don 344090, Russian Federation
| | - Konstantin A Chistyakov
- I. Ya. Postovsky Institute of Organic Synthesis, Ural Branch of the Russian Academy of Sciences, S. Kovalevskaya Str., 22, Yekaterinburg 620219, Russian Federation
| | - Olga I Askalepova
- Department of Chemistry, Southern Federal University, Zorge str., 7, Rostov-on-Don 344090, Russian Federation
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48
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Affiliation(s)
- Tadashi Mori
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University,2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
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49
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Pramanik S, Kauffmann B, Hecht S, Ferrand Y, Huc I. Light-mediated chiroptical switching of an achiral foldamer host in presence of a carbohydrate guest. Chem Commun (Camb) 2021; 57:93-96. [PMID: 33332504 DOI: 10.1039/d0cc06484j] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A photoresponsive diarylethene was incorporated in an achiral helical foldamer container. A carbohydrate guest was found to induce opposite handedness upon binding to the open and closed forms of the diarylethene-containing foldamer, thus enabling chiroptical switching of an achiral host mediated by a chiral guest.
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Affiliation(s)
- Susnata Pramanik
- Department Pharmazie and Center for Integrated Protein Science, Ludwig-Maximilians-Universität, Butenandtstr. 5-13, 81377 München, Germany.
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50
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Xiao X, Pedersen SK, Aranda D, Yang J, Wiscons RA, Pittelkow M, Steigerwald ML, Santoro F, Schuster NJ, Nuckolls C. Chirality Amplified: Long, Discrete Helicene Nanoribbons. J Am Chem Soc 2020; 143:983-991. [DOI: 10.1021/jacs.0c11260] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Xiao Xiao
- Department of Chemistry, Columbia University, New York 10027, United States
| | - Stephan K. Pedersen
- Department of Chemistry, Columbia University, New York 10027, United States
- Department of Chemistry, University of Copenhagen, DK-2100 Copenhagen Ø, Denmark
| | - Daniel Aranda
- Departamente de Quimica Fisica, Universidad de Malaga, Bulevar Louis Pasteur 31, Malaga 29010, Spain
- CNR-Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organo Metallici (ICCOM-CNR), SS di Pisa, Area della Ricerca, via G. Moruzzi 1, I-56124 Pisa, Italy
| | - Jingjing Yang
- Department of Chemistry, Columbia University, New York 10027, United States
| | - Ren A. Wiscons
- Department of Chemistry, Columbia University, New York 10027, United States
| | - Michael Pittelkow
- Department of Chemistry, University of Copenhagen, DK-2100 Copenhagen Ø, Denmark
| | | | - Fabrizio Santoro
- CNR-Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organo Metallici (ICCOM-CNR), SS di Pisa, Area della Ricerca, via G. Moruzzi 1, I-56124 Pisa, Italy
| | | | - Colin Nuckolls
- Department of Chemistry, Columbia University, New York 10027, United States
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