1
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Voigt J, Hasan M, Wäckerlin C, Karnik AV, Ernst KH. Switching the on-surface orientation of oxygen-functionalized helicene. Chirality 2024; 36:e23642. [PMID: 38384155 DOI: 10.1002/chir.23642] [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: 11/20/2023] [Revised: 12/28/2023] [Accepted: 12/28/2023] [Indexed: 02/23/2024]
Abstract
Helicenes represent an important class of chiral organic material with promising optoelectronic properties. Hence, functionalization of surfaces with helicenes is a key step toward new organic materials devices. The deposition of a heterohelicene containing two furano groups and two hydroxyl groups onto copper(111) surface in ultrahigh vacuum leads to different adsorbate modifications. At low coverage and low temperature, the molecules tend to lie on the surface in order to maximize van der Waals contact with the substrate. Thermal treatment leads to deprotonation of the hydroxyl groups and in part into a reorientation from lying into a standing adsorbate mode.
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Affiliation(s)
- Jan Voigt
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
| | - Mohammed Hasan
- Department of Chemistry, University of Mumbai, Mumbai, India
| | - Christian Wäckerlin
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
- Institute of Physics, Swiss Federal Institute of Technology Lausanne (EPFL), Lausanne, Switzerland
- Laboratory for X-ray Nanoscience and Technologies, Paul-Scherrer-Institut (PSI), Villigen, Switzerland
| | - Anil V Karnik
- Department of Chemistry, University of Mumbai, Mumbai, India
| | - Karl-Heinz Ernst
- Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, Switzerland
- Department of Chemistry, University of Zurich, Zürich, Switzerland
- Nanosurf Lab, Institute of Physics of the Czech Academy of Sciences, Prague, Czech Republic
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2
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Bhalodi EH, Shah VR, Butcher RJ, Bedekar AV. Synthesis and Study of Photophysical Properties of 6,12‐Dicyano‐9‐oxa[7]helicene. ChemistrySelect 2021. [DOI: 10.1002/slct.202103669] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Esha H. Bhalodi
- Department of Chemistry Faculty of Science The Maharaja Sayajirao University of Baroda Vadodara 390 002 India
| | - Vraj R. Shah
- Department of Chemistry Faculty of Science The Maharaja Sayajirao University of Baroda Vadodara 390 002 India
| | - Raymond J. Butcher
- Chemistry Department Howard University 525 College Street NW Washington DC 20059 United States
| | - Ashutosh V. Bedekar
- Department of Chemistry Faculty of Science The Maharaja Sayajirao University of Baroda Vadodara 390 002 India
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3
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Sun G, Wang Z, Deng Z, Luo Z, Zhang J. Development of novel C2-symmetrical [5]oxahelicenoid diols. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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4
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Pedersen SK, Eriksen K, Ågren H, Minaev BF, Karaush-Karmazin NN, Hammerich O, Baryshnikov GV, Pittelkow M. A Fully Conjugated Planar Heterocyclic [9]Circulene. J Am Chem Soc 2020; 142:14058-14063. [DOI: 10.1021/jacs.0c05898] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Stephan K. Pedersen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - Kristina Eriksen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - Hans Ågren
- Division of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH, Royal Institute of Technology, 10691 Stockholm, Sweden
- College of Chemistry and Chemical Enginnering, Henan University, Kaifeng, Henan 475004, P. R. China
| | - Boris F. Minaev
- Department of Chemistry and Nanomaterials Science, Bohdan Khmelnytsky National University, 18031 Cherkasy, Ukraine
| | - Nataliya N. Karaush-Karmazin
- Department of Chemistry and Nanomaterials Science, Bohdan Khmelnytsky National University, 18031 Cherkasy, Ukraine
| | - Ole Hammerich
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
| | - Glib V. Baryshnikov
- Division of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH, Royal Institute of Technology, 10691 Stockholm, Sweden
- Department of Chemistry and Nanomaterials Science, Bohdan Khmelnytsky National University, 18031 Cherkasy, Ukraine
| | - Michael Pittelkow
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen Ø, Denmark
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5
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Lousen B, Pedersen SK, Bols P, Hansen KH, Pedersen MR, Hammerich O, Bondarchuk S, Minaev B, Baryshnikov GV, Ågren H, Pittelkow M. Compressing a Non‐Planar Aromatic Heterocyclic [7]Helicene to a Planar Hetero[8]Circulene. Chemistry 2020; 26:4935-4940. [DOI: 10.1002/chem.201905339] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 02/09/2020] [Indexed: 12/14/2022]
Affiliation(s)
- Bodil Lousen
- Department of ChemistryUniversity of Copenhagen Universitetsparken 5 2100 Copenhagen Ø Denmark
| | - Stephan K. Pedersen
- Department of ChemistryUniversity of Copenhagen Universitetsparken 5 2100 Copenhagen Ø Denmark
| | - Pernille Bols
- Department of ChemistryUniversity of Copenhagen Universitetsparken 5 2100 Copenhagen Ø Denmark
| | - Kasper H. Hansen
- Department of ChemistryUniversity of Copenhagen Universitetsparken 5 2100 Copenhagen Ø Denmark
| | - Michelle R. Pedersen
- Department of ChemistryUniversity of Copenhagen Universitetsparken 5 2100 Copenhagen Ø Denmark
| | - Ole Hammerich
- Department of ChemistryUniversity of Copenhagen Universitetsparken 5 2100 Copenhagen Ø Denmark
| | - Sergey Bondarchuk
- Department of Chemistry and Nanomaterials ScienceBohdan Khmelnytsky National University 18031 Cherkasy Ukraine
| | - Boris Minaev
- Department of Chemistry and Nanomaterials ScienceBohdan Khmelnytsky National University 18031 Cherkasy Ukraine
| | - Glib V. Baryshnikov
- Division of Theoretical Chemistry and BiologySchool of Engineering Sciences in Chemistry, Biotechnology and HealthKTH Royal Institute of Technology 10691 Stockholm Sweden
| | - Hans Ågren
- Division of Theoretical Chemistry and BiologySchool of Engineering Sciences in Chemistry, Biotechnology and HealthKTH Royal Institute of Technology 10691 Stockholm Sweden
- College of Chemistry and Chemical EngineeringHenan University Kaifeng Henan 475004 P. R. China
| | - Michael Pittelkow
- Department of ChemistryUniversity of Copenhagen Universitetsparken 5 2100 Copenhagen Ø Denmark
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6
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Khose VN, Hasan M, Khot SC, Mobin SM, Borovkov V, Karnik AV. Directional Approach to Enantiomerically Enriched Functionalized [7]Oxa-helicenoids and Groove-Based Selective Cyanide Sensing. J Org Chem 2020; 85:1847-1860. [PMID: 31858799 DOI: 10.1021/acs.joc.9b02100] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Several regioselective functionalized mono- and disubstituted [7]oxa-helicenoids have been synthesized in the enantiomerically enriched (90-99% ee) form. These functionalized helicenoids exhibited pronounced spectral and chiroptical properties suitable for sensing applications. In particular, corresponding helicenoid's mono and dialdehydes have been effectively used as chemodosimeters for selective detection of cyanide anions over other anions, while simple aromatic aldehydes do not function as cyanide sensors. The groove available in the helical host plays a crucial role in the sensing. The enantiomerically enriched nature of the sensors allows the use of electronic circular dichroism as an uncommon detection tool for cyanide anions, along with conventional fluorescence and NMR methods.
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Affiliation(s)
- Vaibhav N Khose
- Department of Chemistry , University of Mumbai , Vidyanagari, Santacruz (East) , Mumbai 400098 , India
| | - Mohammed Hasan
- Department of Chemistry , University of Mumbai , Vidyanagari, Santacruz (East) , Mumbai 400098 , India.,College of Chemistry and Materials Science , South Central University for Nationalities , 182# Minzu RD , Hongshan District, Wuhan , Hubei province 430074 , China
| | - Sushil C Khot
- Department of Chemistry , University of Mumbai , Vidyanagari, Santacruz (East) , Mumbai 400098 , India
| | - Shaikh M Mobin
- Department of Chemistry , Indian Institute of Technology, Indore , Simrol, Khandwa Road , Indore 453552 , India
| | - Victor Borovkov
- College of Chemistry and Materials Science , South Central University for Nationalities , 182# Minzu RD , Hongshan District, Wuhan , Hubei province 430074 , China
| | - Anil V Karnik
- Department of Chemistry , University of Mumbai , Vidyanagari, Santacruz (East) , Mumbai 400098 , India
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7
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Labrador GM, Besnard C, Bürgi T, Poblador-Bahamonde AI, Bosson J, Lacour J. Stereochemical significance of O to N atom interchanges within cationic helicenes: experimental and computational evidence of near racemization to remarkable enantiospecificity. Chem Sci 2019; 10:7059-7067. [PMID: 31588273 PMCID: PMC6676467 DOI: 10.1039/c9sc02127b] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 06/11/2019] [Indexed: 11/21/2022] Open
Abstract
Oxygen atoms of cationic dioxa and azaoxa [6]helicenes can be exchanged by amino groups to form azaoxa and diaza [6]helicenes respectively. The mild reaction conditions developed herein allow the construction of libraries of derivatives with sensitive and/or functionalized side chains. Using enantioenriched dioxa or azaoxa helicene precursors, these exchanges lead to either near racemization (es 3%) or to a remarkable enantiospecificity (es up to 97%). This unusual behavior is fully characterized via experimental and computational mechanistic evidence. Based on these investigations, the enantiospecificity of the first transformation can be improved to 57-61%.
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Affiliation(s)
| | - Céline Besnard
- Laboratory of Crystallography , University of Geneva , Switzerland
| | - Thomas Bürgi
- Department of Physical Chemistry , University of Geneva , Switzerland
| | | | - Johann Bosson
- Department of Organic Chemistry , University of Geneva , Switzerland . ; ;
| | - Jérôme Lacour
- Department of Organic Chemistry , University of Geneva , Switzerland . ; ;
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8
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Gawade PM, Khose VN, Badani PM, Hasan M, Kaabel S, Mobin SM, Borovkov V, Karnik AV. Benzyne-Mediated Nonconcerted Pathway toward Synthesis of Sterically Crowded [5]- and [7]Oxahelicenoids, Stereochemical and Theoretical Studies, and Optical Resolution of Helicenoids. J Org Chem 2018; 84:860-868. [DOI: 10.1021/acs.joc.8b02507] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Prashant M. Gawade
- Department of Chemistry, University of Mumbai, Vidayanagari, Santacruz (East), Mumbai 400098, India
| | - Vaibhav N. Khose
- Department of Chemistry, University of Mumbai, Vidayanagari, Santacruz (East), Mumbai 400098, India
| | - Purav M. Badani
- Department of Chemistry, University of Mumbai, Vidayanagari, Santacruz (East), Mumbai 400098, India
| | - Mohammed Hasan
- Department of Chemistry, University of Mumbai, Vidayanagari, Santacruz (East), Mumbai 400098, India
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, Tallinn 12618, Estonia
- College of Chemistry and Materials Science, South Central University for Nationalities, 182# Minzu RD, Hongshan District, Wuhan, Hubei Province 430074, China
| | - Sandra Kaabel
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, Tallinn 12618, Estonia
| | - Shaikh M. Mobin
- Departmentof Chemistry, Indian Institute of Technology Indore, Simrol, Khandwa Road, Indore 453552, India
| | - Victor Borovkov
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, Tallinn 12618, Estonia
- College of Chemistry and Materials Science, South Central University for Nationalities, 182# Minzu RD, Hongshan District, Wuhan, Hubei Province 430074, China
| | - Anil V. Karnik
- Department of Chemistry, University of Mumbai, Vidayanagari, Santacruz (East), Mumbai 400098, India
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9
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Gupta R, Cabreros TA, Muller G, Bedekar AV. Enantiomerically Pure 5,13-Dicyano-9-oxa[7]helicene: Synthesis and Study. European J Org Chem 2018; 2018:5397-5405. [PMID: 30853851 PMCID: PMC6402497 DOI: 10.1002/ejoc.201800922] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Indexed: 11/10/2022]
Abstract
Optically pure dicyano oxa[7]helicenes and helicene-like molecules have been prepared and investigated for their optical behavior. The isomers of the intermediate 4,4'-biphen-anthrene-3,3'-diol were resolved by physically separating their 1-menthyl carbonate derivatives. In this work a mild method was developed to cleave ArOMe in presence of a cyano group. The optical rotation of atropisomeric diol, helicenes-like compounds and the oxa[7]helicenes was observed to be in increasing order, while the molecules also showed good response to circularly polarized luminescence.
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Affiliation(s)
- Riddhi Gupta
- Department of Chemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara 390 002, INDIA
| | - Trevor A Cabreros
- Department of Chemistry, San José State University, One Washington Square, San José, California 95192-0101, USA
| | - Gilles Muller
- Department of Chemistry, San José State University, One Washington Square, San José, California 95192-0101, USA
| | - Ashutosh V Bedekar
- Department of Chemistry, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara 390 002, INDIA
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10
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11
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Abstract
Helicenes are unique helical chromophores possessing advanced and well-controlled spectral and chemical properties owing to their diverse functionalization and defined structures. Specific modification of these molecules by introducing aromatic rings of differing nature and different functional groups results in special chiroptical properties, making them effective chiral auxiliaries and supramolecular chirogenic hosts. This review aims to highlight these distinct structural features of helicenes; the different synthetic and supramolecular approaches responsible for their efficient chirality control; and their employment in the chirogenic systems, which are still not fully explored. It further covers the limitation, scope, and future prospects of helicene chromophores in chiral chemistry.
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12
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Hasan M, Khose VN, Mori T, Borovkov V, Karnik AV. Sui Generis Helicene-Based Supramolecular Chirogenic System: Enantioselective Sensing, Solvent Control, and Application in Chiral Group Transfer Reaction. ACS OMEGA 2017; 2:592-598. [PMID: 31457457 PMCID: PMC6641162 DOI: 10.1021/acsomega.6b00522] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 02/03/2017] [Indexed: 06/10/2023]
Abstract
A novel dioxa[6]helicene-based supramolecular chirogenic system (1) as a specific chiral recognition host for enantiopure trans-1,2-cyclohexanediamine (2) is reported. Host 1 with an inherent free phenolic group and a (1S)-camphanate chiral handle on the opposite terminal rings of the helicene chromophore acted as an efficient turn on fluorescent sensor for S,S-2 with an excellent enantioselective factor, α = K SS /K RR = 6.3 in benzene. This specific host-guest interaction phenomenon is found to be solvent-dependent, which leads to an enantioselective chiral (camphanate) group transfer to the diamine guest molecule. In the case of R,R-2, the de value is up to 68% even at room temperature. Intriguingly, the induced helicity in dioxa[6]helicene diol 6, upon supramolecular hydrogen-bonding interactions, is of opposite sense with positive helicity for S,S-2 and negative helicity for R,R-2, as shown by circular dichroism spectroscopy and in combination with theoretical calculations. This chiral supramolecular system is found to be an excellent host-guest pair for enantiomeric recognition of 2, based on their electronic and steric factors.
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Affiliation(s)
- Mohammed Hasan
- Department
of Chemistry, University of Mumbai, Vidayanagari, Santacruz, Mumbai 400098, India
- Department
of Chemistry and Biotechnology, Tallinn
University of Technology, Akadeemia tee 15, Tallinn 12618, Estonia
| | - Vaibhav N. Khose
- Department
of Chemistry, University of Mumbai, Vidayanagari, Santacruz, Mumbai 400098, India
| | - Tadashi Mori
- Department
of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita 565-0871, Japan
| | - Victor Borovkov
- Department
of Chemistry and Biotechnology, Tallinn
University of Technology, Akadeemia tee 15, Tallinn 12618, Estonia
| | - Anil V. Karnik
- Department
of Chemistry, University of Mumbai, Vidayanagari, Santacruz, Mumbai 400098, India
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13
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Kushida Y, Saito N, Shigeno M, Yamaguchi M. Multiple competing pathways for chemical reaction: drastic reaction shortcut for the self-catalytic double-helix formation of helicene oligomers. Chem Sci 2017; 8:1414-1421. [PMID: 28451281 PMCID: PMC5390785 DOI: 10.1039/c6sc01893a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Accepted: 10/13/2016] [Indexed: 12/16/2022] Open
Abstract
Competition among multiple pathways in a chemical reaction exhibits notable kinetic phenomena, particularly when amplification by self-catalysis is involved. A pseudoenantiomeric 1 : 1 mixture of an aminomethylene helicene (P)-tetramer and an (M)-pentamer formed enantiomeric hetero-double helices B and C in solution when random coil A was cooled. When a solution of A at 70 °C was directly cooled to 25 °C, the A-to-B reaction was predominant, then B was slowly converted to C over 60 h. The slow conversion in the A-to-B-to-C reaction was due to the formation of the hetero-double helix B, which was an off-pathway intermediate, and the slow B-to-C conversion. In contrast, when a solution of A at 70 °C was snap-cooled to -25 °C before then maintaining the solution at 25 °C, the A-to-C reaction predominated, and the formation of C was complete within 4 h. The reactions involve competition between the self-catalytic A-to-B and A-to-C pathways, where B and C catalyze the A-to-B and A-to-C reactions, respectively. Subtle differences in the initial states generated by thermal pretreatment were amplified by the self-catalytic process, which resulted in a drastic reaction shortcut.
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Affiliation(s)
- Yo Kushida
- Department of Organic Chemistry , Graduate School of Pharmaceutical Sciences , Tohoku University , Aoba , Sendai , 980-8578 , Japan .
| | - Nozomi Saito
- Department of Organic Chemistry , Graduate School of Pharmaceutical Sciences , Tohoku University , Aoba , Sendai , 980-8578 , Japan .
| | - Masanori Shigeno
- Department of Organic Chemistry , Graduate School of Pharmaceutical Sciences , Tohoku University , Aoba , Sendai , 980-8578 , Japan .
| | - Masahiko Yamaguchi
- Department of Organic Chemistry , Graduate School of Pharmaceutical Sciences , Tohoku University , Aoba , Sendai , 980-8578 , Japan .
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14
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Cretenoud J, Özen B, Schmaltz T, Görl D, Fabrizio A, Corminboeuf C, Fadaei Tirani F, Scopelliti R, Frauenrath H. Synthesis and characterization of semiaromatic polyamides comprising benzofurobenzofuran repeating units. Polym Chem 2017. [DOI: 10.1039/c7py00129k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Extended π-conjugated segments such as benzofurobenzofuran can be included into polyamides with high glass transition temperatures.
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Affiliation(s)
- Julien Cretenoud
- Ecole Polytechnique Fédérale de Lausanne (EPFL)
- Institute of Materials
- Laboratory of Macromolecular and Organic Materials
- 1015 Lausanne
- Switzerland
| | - Bilal Özen
- Ecole Polytechnique Fédérale de Lausanne (EPFL)
- Institute of Materials
- Laboratory of Macromolecular and Organic Materials
- 1015 Lausanne
- Switzerland
| | - Thomas Schmaltz
- Ecole Polytechnique Fédérale de Lausanne (EPFL)
- Institute of Materials
- Laboratory of Macromolecular and Organic Materials
- 1015 Lausanne
- Switzerland
| | - Daniel Görl
- Ecole Polytechnique Fédérale de Lausanne (EPFL)
- Institute of Materials
- Laboratory of Macromolecular and Organic Materials
- 1015 Lausanne
- Switzerland
| | - Alberto Fabrizio
- Ecole Polytechnique Fédérale de Lausanne (EPFL)
- Institute of Chemical Science and Engineering
- Laboratory for Computational Molecular Design
- Switzerland
| | - Clémence Corminboeuf
- Ecole Polytechnique Fédérale de Lausanne (EPFL)
- Institute of Chemical Science and Engineering
- Laboratory for Computational Molecular Design
- Switzerland
| | - Farzaneh Fadaei Tirani
- Ecole Polytechnique Fédérale de Lausanne (EPFL)
- Institute of Chemical Science and Engineering
- Switzerland
| | - Rosario Scopelliti
- Ecole Polytechnique Fédérale de Lausanne (EPFL)
- Institute of Chemical Science and Engineering
- Switzerland
| | - Holger Frauenrath
- Ecole Polytechnique Fédérale de Lausanne (EPFL)
- Institute of Materials
- Laboratory of Macromolecular and Organic Materials
- 1015 Lausanne
- Switzerland
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15
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Katayama T, Nakatsuka S, Hirai H, Yasuda N, Kumar J, Kawai T, Hatakeyama T. Two-Step Synthesis of Boron-Fused Double Helicenes. J Am Chem Soc 2016; 138:5210-3. [DOI: 10.1021/jacs.6b01674] [Citation(s) in RCA: 150] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Takazumi Katayama
- Department
of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Soichiro Nakatsuka
- Department
of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Hiroki Hirai
- Department
of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | - Nobuhiro Yasuda
- Japan Synchrotron Radiation Research Institute (JASRI)/SPring-8, 1-1-1, Kouto, Sayo-cho,
Sayo-gun, Hyogo 679-5198, Japan
| | - Jatish Kumar
- Graduate
School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| | - Tsuyoshi Kawai
- Graduate
School of Materials Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
| | - Takuji Hatakeyama
- Department
of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
- Elements
Strategy Initiative for Catalysts and Batteries, Kyoto University, Katsura, Kyoto 615-8520, Japan
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16
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Hasan M, Khose VN, Pandey AD, Borovkov V, Karnik AV. Tailor-Made Supramolecular Chirogenic System Based on Cs-Symmetric Rigid Organophosphoric Acid Host and Amino Alcohols: Mechanistic Studies, Bulkiness Effect, and Chirality Sensing. Org Lett 2016; 18:440-3. [DOI: 10.1021/acs.orglett.5b03477] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mohammed Hasan
- Department
of Chemistry, University of Mumbai, Vidayanagari, Santacruz (East), Mumbai 400098, India
| | - Vaibhav N. Khose
- Department
of Chemistry, University of Mumbai, Vidayanagari, Santacruz (East), Mumbai 400098, India
| | - Anita D. Pandey
- Department
of Chemistry, University of Mumbai, Vidayanagari, Santacruz (East), Mumbai 400098, India
| | - Victor Borovkov
- Department
of Chemistry, Tallinn University of Technology, Akadeemia tee 15, Tallinn 12618, Estonia
| | - Anil V. Karnik
- Department
of Chemistry, University of Mumbai, Vidayanagari, Santacruz (East), Mumbai 400098, India
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17
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Sundar MS, Bedekar AV. Synthesis of enantiomerically pure helicene-like mono 1,3-oxazines from 1,1′-binaphthyl-2,2′,7-triol and study of their chiroptical properties. RSC Adv 2016. [DOI: 10.1039/c6ra10496g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Several helicene-like molecules have been synthesized and characterized. The effect of helicene-like structural arrangement was more prominent in the chiroptical properties as compared to the stereogenic center of the diastereomeric compounds.
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Affiliation(s)
- M. Shyam Sundar
- Department of Chemistry
- Faculty of Science
- M. S. University of Baroda
- Vadodara 390 002
- India
| | - Ashutosh V. Bedekar
- Department of Chemistry
- Faculty of Science
- M. S. University of Baroda
- Vadodara 390 002
- India
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18
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Abstract
Synthesis of the title compound 7,12,17-trioxa[11]helicene, a large oxygen-containing helicene, has been reported. The 11-membered heterohelicene was synthesized by a combination of two simple reactions involving oxidative coupling and dehydrative cyclization. The final helicene was characterized by single-crystal X-ray diffraction, fluorescence spectroscopy, and differential scanning calorimetric analysis.
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Affiliation(s)
- M Shyam Sundar
- Department of Chemistry, Faculty of Science, M.S. University of Baroda , Vadodara 390 002, India
| | - Ashutosh V Bedekar
- Department of Chemistry, Faculty of Science, M.S. University of Baroda , Vadodara 390 002, India
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