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Formen JSSK, Wolf C. Chiroptical Switching and Quantitative Chirality Sensing with (Pseudo)halogenated Quinones. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202111542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | - Christian Wolf
- Department of Chemistry Georgetown University Washington DC 20057 USA
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2
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Formen JSSK, Wolf C. Chiroptical Switching and Quantitative Chirality Sensing with (Pseudo)halogenated Quinones. Angew Chem Int Ed Engl 2021; 60:27031-27038. [PMID: 34679202 DOI: 10.1002/anie.202111542] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Indexed: 11/11/2022]
Abstract
(Pseudo)halogenated quinones react smoothly with chiral amines, amino alcohols, and amino acids toward push-pull conjugates with optical sensing and switching applications. The chiroptically active conjugates serve as redox switches between two reversibly interconverting states with remarkably different UV and CD signatures. Addition of sodium borohydride generates a hydroquinone derivative that is quantitatively re-oxidized to the original quinone upon exposure to air. This chiroptical quinone/hydroquinone redox switch system combines several attractive features such as simple set-up, use of inexpensive chemicals, short response time, and thermal and photochemical stability. A conceptually new sensing approach that is based on integrated chiroptical amplification and redox switching enables on-the-fly deconvolution of otherwise overlapping CD spectra and is used for quantitative er analysis of challenging samples containing constitutional isomers in varying enantiomeric compositions.
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Affiliation(s)
| | - Christian Wolf
- Department of Chemistry, Georgetown University, Washington, DC, 20057, USA
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3
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Setsune J, Omae S, Tsujimura Y, Mochida T, Sakurai T, Ohta H. Synthesis, Structure, and Magnetic Properties of Linear Trinuclear CuII and NiII Complexes of Porphyrin Analogues Embedded with Binaphthol Units. Symmetry (Basel) 2020; 12:1610. [DOI: 10.3390/sym12101610] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A porphyrin analogue embedded with (S)-1,1′-bi-2-naphthol units was synthesized without reducing optical purity of the original binaphthol unit. This new macrocyclic ligand provides the hexaanionic N4O4 coordination environment that enables a linear array of three metal ions. That is, it provides the square planar O4 donor set for the central metal site and the distorted square planar N2O2 donor set for the terminal metal sites. In fact, a CuII3 complex with a Cu(1)–Cu(2) distance of 2.910 Å, a Cu(1)–Cu(2)–Cu(1′) angle of 174.7°, and a very planar Cu2O2 diamond core was obtained. The variable-temperature 1H-NMR study of the CuII3 complex showed increasing paramagnetic shifts for the naphthyl protons as temperature increased, which suggests strong antiferromagnetic coupling of CuII ions. The temperature dependence of the magnetic susceptibility indicated antiferromagnetic coupling both for the CuII3 complex (J = −434 cm−1) and for the NiII3 complex (J = −49 cm−1). The linear (L)M(µ-OR)2M(µ-OR)2M(L) core in a rigid macrocycle cavity made of aromatic components provides robust metal complexes that undergo reversible ligation at the apical sites of the central metal.
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4
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de J. Gómez-Infante A, Bañuelos J, Valois-Escamilla I, Cruz-Cruz D, Prieto-Montero R, López-Arbeloa I, Arbeloa T, Peña-Cabrera E. Synthesis, Properties, and Functionalization of Nonsymmetric 8-MethylthioBODIPYs. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600724] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Jorge Bañuelos
- Dpto.Química Física; Universidad del País Vasco (UPV/EHU); Aptdo. 644 48080 Bilbao Spain
| | | | - David Cruz-Cruz
- Universidad de Guanajuato; Col. Noria Alta S/N 36050 Guanajuato Mexico
| | - Ruth Prieto-Montero
- Dpto.Química Física; Universidad del País Vasco (UPV/EHU); Aptdo. 644 48080 Bilbao Spain
| | - Iñigo López-Arbeloa
- Dpto.Química Física; Universidad del País Vasco (UPV/EHU); Aptdo. 644 48080 Bilbao Spain
| | - Teresa Arbeloa
- Dpto.Química Física; Universidad del País Vasco (UPV/EHU); Aptdo. 644 48080 Bilbao Spain
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5
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Bruhn T, Pescitelli G, Witterauf F, Ahrens J, Funk M, Wolfram B, Schneider H, Radius U, Bröring M. Cryptochirality in 2,2′-Coupled BODIPY DYEmers. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600585] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Torsten Bruhn
- Institut für Organische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Gennaro Pescitelli
- Dipartimento di Chimica e Chimica Industriale; Università di Pisa; Via Moruzzi 13 56124 Pisa Italy
| | - Franziska Witterauf
- Institut für Organische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Johannes Ahrens
- Institut für Anorganische und Analytische Chemie (IAAC); Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Germany
| | - Markus Funk
- Institut für Anorganische und Analytische Chemie (IAAC); Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Germany
| | - Benedikt Wolfram
- Institut für Anorganische und Analytische Chemie (IAAC); Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Germany
| | - Heidi Schneider
- Institut für Anorganische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Udo Radius
- Institut für Anorganische Chemie; Universität Würzburg; Am Hubland 97074 Würzburg Germany
| | - Martin Bröring
- Institut für Anorganische und Analytische Chemie (IAAC); Technische Universität Braunschweig; Hagenring 30 38106 Braunschweig Germany
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Ray C, Sánchez-Carnerero EM, Moreno F, Maroto BL, Agarrabeitia AR, Ortiz MJ, López-Arbeloa Í, Bañuelos J, Cohovi KD, Lunkley JL, Muller G, de la Moya S. Bis(haloBODIPYs) with Labile Helicity: Valuable Simple Organic Molecules That Enable Circularly Polarized Luminescence. Chemistry 2016; 22:8805-8. [PMID: 27123965 DOI: 10.1002/chem.201601463] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Revised: 04/08/2016] [Indexed: 12/27/2022]
Abstract
Simple organic molecules (SOM) based on bis(haloBODIPY) are shown to enable circularly polarized luminescence (CPL), giving rise to a new structural design for technologically valuable CPL-SOMs. The established design comprises together synthetic accessibility, labile helicity, possibility of reversing the handedness of the circularly polarized emission, and reactive functional groups, making it unique and attractive as advantageous platform for the development of smart CPL-SOMs.
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Affiliation(s)
- César Ray
- Departamento de Química Orgánica I. Facultad de Ciencias Quimicas., Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
| | - Esther M Sánchez-Carnerero
- Departamento de Química Orgánica I. Facultad de Ciencias Quimicas., Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
| | - Florencio Moreno
- Departamento de Química Orgánica I. Facultad de Ciencias Quimicas., Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
| | - Beatriz L Maroto
- Departamento de Química Orgánica I. Facultad de Ciencias Quimicas., Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
| | - Antonia R Agarrabeitia
- Departamento de Química Orgánica I. Facultad de Ciencias Quimicas., Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
| | - María J Ortiz
- Departamento de Química Orgánica I. Facultad de Ciencias Quimicas., Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
| | - Íñigo López-Arbeloa
- Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco-EHU, Apartado 644, 48080, Bilbao, Spain
| | - Jorge Bañuelos
- Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco-EHU, Apartado 644, 48080, Bilbao, Spain
| | - Komlan D Cohovi
- Department of Chemistry, San José State University, San José, CA, 95192-0101, USA
| | - Jamie L Lunkley
- Department of Chemistry, San José State University, San José, CA, 95192-0101, USA
| | - Gilles Muller
- Department of Chemistry, San José State University, San José, CA, 95192-0101, USA
| | - Santiago de la Moya
- Departamento de Química Orgánica I. Facultad de Ciencias Quimicas., Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain.
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7
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Tamaoki H, Katoono R, Fujiwara K, Suzuki T. Assembly of an Axially Chiral Dynamic Redox System with a Perfluorobiphenyl Skeleton into Dumbbell- or Tripod-type Electron Donors. Angew Chem Int Ed Engl 2016; 55:2582-6. [PMID: 26748461 DOI: 10.1002/anie.201510935] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 12/10/2015] [Indexed: 11/08/2022]
Abstract
The incorporation of F atoms endows a diethenylbiphenyl-based electron donor with configurational stability and SN Ar reactivity. The former enables the dynamic redox pair of (Rax)-1/(Rax ,R,R)-1(2+) to exhibit drastic UV/Vis and CD spectral changes upon electrolysis, whereas the latter makes it possible for (Rax)-1 to serve as a useful chiral synthon for the production of larger assemblies [(Rax ,Rax)-2 d,p,m and (Rax ,Rax ,Rax)-3] containing two or three dyrex units. These dyads and triad also exhibit a clean electrochiroptical response with isosbestic points owing to one-wave multi-electron transfer.
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Affiliation(s)
- Hitomi Tamaoki
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Ryo Katoono
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Kenshu Fujiwara
- Faculty of Engineering Science, Akita University, Akita, 010-8052, Japan
| | - Takanori Suzuki
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan.
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8
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Tamaoki H, Katoono R, Fujiwara K, Suzuki T. Assembly of an Axially Chiral Dynamic Redox System with a Perfluorobiphenyl Skeleton into Dumbbell- or Tripod-type Electron Donors. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201510935] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Hitomi Tamaoki
- Department of Chemistry; Faculty of Science; Hokkaido University; Sapporo 060-0810 Japan
| | - Ryo Katoono
- Department of Chemistry; Faculty of Science; Hokkaido University; Sapporo 060-0810 Japan
| | - Kenshu Fujiwara
- Faculty of Engineering Science; Akita University; Akita 010-8052 Japan
| | - Takanori Suzuki
- Department of Chemistry; Faculty of Science; Hokkaido University; Sapporo 060-0810 Japan
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9
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Bruhn T, Pescitelli G, Jurinovich S, Schaumlöffel A, Witterauf F, Ahrens J, Bröring M, Bringmann G. Axial-chirale BODIPY-DYEmers: eine offensichtliche Ausnahme für die Exciton-Chiralitäts-Methode. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408398] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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10
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Bruhn T, Pescitelli G, Jurinovich S, Schaumlöffel A, Witterauf F, Ahrens J, Bröring M, Bringmann G. Axially Chiral BODIPY DYEmers: An Apparent Exception to the Exciton Chirality Rule. Angew Chem Int Ed Engl 2014; 53:14592-5. [DOI: 10.1002/anie.201408398] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Indexed: 01/16/2023]
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11
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Kobayakawa K, Hasegawa M, Sasaki H, Endo J, Matsuzawa H, Sako K, Yoshida J, Mazaki Y. Dimeric Tetrathiafulvalene Linked topseudo-ortho-[2.2]Paracyclophane: Chiral Electrochromic Properties and Use as a Chiral Dopant. Chem Asian J 2014; 9:2751-4. [DOI: 10.1002/asia.201402667] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Indexed: 11/06/2022]
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12
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Suzuki T, Sakano Y, Iwai T, Iwashita S, Miura Y, Katoono R, Kawai H, Fujiwara K, Tsuji Y, Fukushima T. 7,7,8,8-Tetraaryl-o-quinodimethane Stabilized by Dibenzo Annulation: A Helical π-Electron System That Exhibits Electrochromic and Unique Chiroptical Properties. Chemistry 2012; 19:117-23. [DOI: 10.1002/chem.201203092] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Indexed: 11/11/2022]
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13
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Suzuki T, Ishigaki Y, Iwai T, Kawai H, Fujiwara K, Ikeda H, Kano Y, Mizuno K. Multi-Input/Multi-Output Molecular Response System Based on the Dynamic Redox Behavior of 3,3,4,4-Tetraaryldihydro[5]helicene Derivatives: Reversible Formation/Destruction of Chiral Fluorophore and Modulation of Chiroptical Properties by Solvent Polarity. Chemistry 2009; 15:9434-41. [DOI: 10.1002/chem.200900968] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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14
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Bröring M, Krüger R, Kleeberg C. BF2-Chelate Complexes of 6-(4-Iodophenyl)-2,3,4,8,9,10-hexamethyldipyrrin and 2-(4-Iodobenzoyl)-3,4,5-trimethylpyrrole: Fluorescent Dyes with a Chemical Anchor Group. Z Anorg Allg Chem 2008. [DOI: 10.1002/zaac.200800112] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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15
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Deng J, Song N, Liu W, Zhou Q, Wang ZY. Towards Near-Infrared Chiroptically Switching Materials: Theoretical and Experimental Studies on Viologen-Containing 1,1′-Binaphthyls. Chemphyschem 2008; 9:1265-9. [DOI: 10.1002/cphc.200800140] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Wang C, Zhang D, Zhang G, Xiang J, Zhu D. An Hg2+-Gated Chiral Molecular Switch Created by Using Binaphthalene Molecules with Two Anthracene Units and Two 1,3-Dithiole-2-thione (1,3-Dithiole-2-one) Units. Chemistry 2008; 14:5680-6. [DOI: 10.1002/chem.200800216] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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17
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Bröring M, Krüger R, Link S, Kleeberg C, Köhler S, Xie X, Ventura B, Flamigni L. Bis(BF2)-2,2′-Bidipyrrins (BisBODIPYs): Highly Fluorescent BODIPY Dimers with Large Stokes Shifts. Chemistry 2008; 14:2976-83. [DOI: 10.1002/chem.200701912] [Citation(s) in RCA: 213] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abstract
Novel NIR fluorescent, conformational restricted aza-dipyrromethene boron difluoride (aza-BODIPY) dyes were prepared by an efficient process. Such conformational restricted aza-BODIPY dyes possess intense absorption, strong fluorescence, high chemical and photostability. Additionally, the sharp fluorescence of non-amine containing aza-BODIPY dyes is insensitive to solvent polarity.
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Affiliation(s)
- Weili Zhao
- Laboratorium für Organische Chemie, ETH Zürich, HCI H335, 8093 Zürich
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19
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Suzuki T, Tanaka S, Kawai H, Fujiwara K. Multi-input–Multi-output Molecular Response System Based on Dynamic Redox Behavior of Hexaphenylethane-type Electron Donors with the Tetrahydrophenanthrazepine Skeleton: Strong Chiroptical Signals through the Transmission of Point Chirality to Helicity. Chem Asian J 2007; 2:171-7. [PMID: 17441151 DOI: 10.1002/asia.200600299] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The title heterocyclic donors undergo reversible C-C bond formation/cleavage upon electron transfer (dynamic redox behavior). The helical sense in both neutral and cationic states is interconvertible by facile ring flipping. The pi-type asymmetric center on the azepine nitrogen atom induces a significant degree of diasteromeric preference, thus endowing strong CD activity based on exciton coupling. Chiroptical properties could be modified not only by redox reactions but also by heat and protonation. The present redox pairs can serve as unprecedented three-way-input (e, H+, delta) and two-way-output (UV/Vis, CD) response systems.
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Affiliation(s)
- Takanori Suzuki
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo 060-0810, Japan.
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Röhr H, Trieflinger C, Rurack K, Daub J. Proton- and Redox-Controlled Switching of Photo- and Electrochemiluminescence in Thiophenyl-Substituted Boron-Dipyrromethene Dyes. Chemistry 2006; 12:689-700. [PMID: 16231292 DOI: 10.1002/chem.200500729] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
A luminescent molecular switch in which the active thiol/disulfide switching element is attached to a meso-phenyl-substituted boron-dipyrromethene (BDP) chromophore as the signalling unit is presented. The combination of these two functional units offers great versatility for multimodal switching of luminescence: 1) deprotonation/protonation of the thiol/thiolate moiety allows the highly fluorescent meso-p-thiophenol-BDP and its nonfluorescent thiolate analogue to be chemically and reversibly interconverted, 2) electrochemical oxidation of the monomeric dyes yields the fluorescent disulfide-bridged bichromophoric dimer, also in a fully reversible process, and 3) besides conventional photoexcitation, the well separated redox potentials of the BDP also allow the excited BDP state to be generated electrochemically (i.e., processes 1) and 2) can be employed to control both photo- and electrochemiluminescence (ECL) of the BDP). The paper introduces and characterizes the various states of the switch and discusses the underlying mechanisms. Investigation of the ortho analogue of the dimer provided insight into potential chromophore-chromophore interactions in such bichromophoric architectures in both the ground and the excited state. Comparison of the optical and redox properties of the two disulfide dimers further revealed structural requirements both for redox switches and for ECL-active molecular ensembles. By employing thiol/disulfide switching chemistry and BDP luminescence features, it was possible to create a prototype molecular ensemble that shows both fully reversible proton- and redox-gated electrochemiluminescence.
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Affiliation(s)
- Holger Röhr
- Div. I.3, Bundesanstalt für Materialforschung und -prüfung (BAM), Berlin, Germany
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21
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Zhao W, Carreira EM. Conformationally Restricted Aza-Bodipy: A Highly Fluorescent, Stable, Near-Infrared-Absorbing Dye. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200461868] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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22
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Affiliation(s)
- Weili Zhao
- Laboratorium für Organische Chemie, ETH Hönggerberg, HCI H335, 8093 Zürich, Switzerland
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23
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Abstract
In nonpolar solvents, the cyclic hexapeptide 2, which comprises alternating D-alpha-amino and D-alpha-aminoxy acids, adopts a C3-symmetric conformation with alternating eight (N--O turns)- and seven (gamma turns)-membered-ring hydrogen bonds. A series of anion-binding studies has suggested that 2 can function as an effective anion receptor that not only displays a high selectivity for chloride ions, but also the capability to extract chloride ions from aqueous solutions into organic phases.
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Affiliation(s)
- Dan Yang
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
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24
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Strauss J, Daub J. Optically active cyclic hexapeptides with covalently attached pyrene probes: selective alkaline earth metal ion recognition using excimer emission. Org Lett 2002; 4:683-6. [PMID: 11869101 DOI: 10.1021/ol0170354] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[structure: see text] The synthesis of two optically active pyrene-modified cyclic hexapetides and their selectivity toward the complexation of alkaline earth metal ions are reported. Complexation was studied by optical and chiroptical methods. The cyclic peptides are forming 2:1 sandwich complexes with the metal ions.
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Affiliation(s)
- Jörg Strauss
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, D-93053 Regensburg
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25
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Redl FX, Lutz M, Daub J. Chemistry of porphyrin-appended cellulose strands with a helical structure: spectroscopy, electrochemistry, and in situ circular dichroism spectroelectrochemistry. Chemistry 2001; 7:5350-8. [PMID: 11822435 DOI: 10.1002/1521-3765(20011217)7:24<5350::aid-chem5350>3.0.co;2-f] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Around 100 porphyrin units have been selectively linked at C(6)-O to a cellulose (Avicel). The properties of the metal-free and zincated porphyrin-celluloses 2 and Zn-2 have been determined by optical and electrochemical methods. Circular dichroism indicates a helical arrangement of the porphyrin units and reveals intra-chain coupling reminiscent, in the broadest sense, of strands of nucleic acids. Cyclic voltammetry and spectroelectrochemistry have been used to characterize the radical ions and dianions. The electrochromism of the oxidation of cellulose 2 to porphyrin radical cations of 2 has been employed for both molecular switching and the transduction of an electrochemical input into chiroptical signal expression.
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Affiliation(s)
- F X Redl
- Institute of Organic Chemistry, Regensburg University, Germany
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26
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Nishida JI, Suzuki T, Ohkita M, Tsuji T. A Redox Switch Based on Dihydro[5]helicene: Drastic Chiroptical Response Induced by Reversible C−C Bond Making/Breaking upon Electron Transfer. Angew Chem Int Ed Engl 2001. [DOI: 10.1002/1521-3757(20010903)113:17<3351::aid-ange3351>3.0.co;2-l] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Nishida JI, Suzuki T, Ohkita M, Tsuji T. A Redox Switch Based on Dihydro[5]helicene: Drastic Chiroptical Response Induced by Reversible C−C Bond Making/Breaking upon Electron Transfer. Angew Chem Int Ed Engl 2001; 40:3251-3254. [DOI: 10.1002/1521-3773(20010903)40:17<3251::aid-anie3251>3.0.co;2-p] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2001] [Indexed: 11/07/2022]
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