1
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Fluorescent sensors and rapid detection films for Fe3+ and Cu2+ based on naphthalene and cholesterol derivative organogels. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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2
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Hodecker M, Driscoll AM, Bunz UHF, Dreuw A. Twisting and bending photo-excited phenylethynylbenzenes - a theoretical analysis. Phys Chem Chem Phys 2020; 22:9974-9981. [PMID: 32356545 DOI: 10.1039/d0cp01662d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Oligo(phenylethynyl)benzenes are a family of compounds that exhibit a rich photochemistry changing dramatically with different orientation of a phenyl group in the molecule. Quantum-chemical calculations have been performed to investigate different members of this family of compounds and compared to previous experimental and theoretical studies. 1,4-Bis(phenylethynyl)benzene (BPEB) has different optical properties than its smaller relative diphenylacetylene; however, upon twisting an outer phenyl ring of BPEB, its photochemistry becomes very similar. Fluorine substituents at the central benzene ring are shown to have only small effects on the optical properties of BPEB.
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Affiliation(s)
- Manuel Hodecker
- Interdisciplinary Center for Scientific Computing, Heidelberg University, Im Neuenheimer Feld 205, D-69120 Heidelberg, Germany.
| | - Alexis M Driscoll
- Interdisciplinary Center for Scientific Computing, Heidelberg University, Im Neuenheimer Feld 205, D-69120 Heidelberg, Germany. and Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - Uwe H F Bunz
- Institute of Organic Chemistry, Heidelberg University, Im Neuenheimer Feld 270, D-69120 Heidelberg, Germany
| | - Andreas Dreuw
- Interdisciplinary Center for Scientific Computing, Heidelberg University, Im Neuenheimer Feld 205, D-69120 Heidelberg, Germany.
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3
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Hong JH, Ko MS, Rao PS, Cho DG. Systematic Modifications of a Simple Tolan: Another Category of Viscosity Sensor. Org Lett 2019; 21:10085-10089. [PMID: 31808700 DOI: 10.1021/acs.orglett.9b04050] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The first tolan derivative-based viscosity sensor (5d) has been synthesized, and its fluorescence intensity and lifetime increase when the viscosity of the solvent increases in methanol-glycerol mixtures. Phthalide (5d) was selected among structurally diverse tolan derivatives through systematic modifications of a simple tolan. To test 5d as a viscosity sensor, fluorescence lifetime imaging (FLIM) images of HeLa cells were obtained upon treatment with 5 μM of 5d to map the viscosity of the HeLa cells.
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Affiliation(s)
- Jung-Ho Hong
- Department of Chemistry and Chemical Engineering , Inha University , Inharo 100 , Incheon 22212 , Republic of Korea
| | - Min-Sung Ko
- Department of Chemistry and Chemical Engineering , Inha University , Inharo 100 , Incheon 22212 , Republic of Korea
| | - P Sankara Rao
- Department of Chemistry and Chemical Engineering , Inha University , Inharo 100 , Incheon 22212 , Republic of Korea
| | - Dong-Gyu Cho
- Department of Chemistry and Chemical Engineering , Inha University , Inharo 100 , Incheon 22212 , Republic of Korea
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4
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Sharber SA, Shih KC, Mann A, Frausto F, Haas TE, Nieh MP, Thomas SW. Reversible mechanofluorochromism of aniline-terminated phenylene ethynylenes. Chem Sci 2018; 9:5415-5426. [PMID: 30009013 PMCID: PMC6009520 DOI: 10.1039/c8sc00980e] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 05/23/2018] [Indexed: 01/24/2023] Open
Abstract
Seven three-ring phenylene-ethynylene (PE) structural analogs, differing only in the lengths of alkyl chains on terminal aniline substituents, show 50-62 nm bathochromic shifts in emission maxima in response to mechanical force (mechanofluorochromism, MC). These shifts are fully reversible with heat or solvent fuming. Shearing of these solids yields a transition from green-emitting crystalline phases to orange-emitting amorphous phases as established by differential scanning calorimetry and X-ray diffraction. Molecules with shorter alkyl chain lengths required higher temperatures to recover the hypsochromically shifted crystalline phases after grinding, while the recovery with chain lengths longer than butyl occurred at room temperature. In addition to this structure-dependent thermochromism, these compounds retain their MC properties in polymer hosts to various extents. The crystalline phases of these materials have PE chromophores that are twisted due to non-covalent perfluoroarene-arene (ArF-ArH) interactions involving perfluorophenyl pendants and the terminal rings of the PE chromophore, resulting in interrupted conjugation and an absence of chromophore aggregation. The MC behavior of an analog without the perfluoroarene rings is severely attenuated. This work demonstrates the general utility of twisted PEs as stimuli-responsive moieties and reveals clear structure-property relationships regarding the effects of alkyl chain length on these materials.
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Affiliation(s)
- Seth A Sharber
- Department of Chemistry , Tufts University , 62 Talbot Avenue , Medford , MA 02155 , USA .
| | - Kuo-Chih Shih
- Department of Chemical & Biomolecular Engineering , University of Connecticut , 97 North Eagleville Road, Storrs , CT 06269 , USA
| | - Arielle Mann
- Department of Chemistry , Tufts University , 62 Talbot Avenue , Medford , MA 02155 , USA .
| | - Fanny Frausto
- Department of Chemistry , Tufts University , 62 Talbot Avenue , Medford , MA 02155 , USA .
| | - Terry E Haas
- Department of Chemistry , Tufts University , 62 Talbot Avenue , Medford , MA 02155 , USA .
| | - Mu-Ping Nieh
- Department of Chemical & Biomolecular Engineering , University of Connecticut , 97 North Eagleville Road, Storrs , CT 06269 , USA
| | - Samuel W Thomas
- Department of Chemistry , Tufts University , 62 Talbot Avenue , Medford , MA 02155 , USA .
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5
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Kozhemyakin Y, Kretzschmar A, Krämer M, Rominger F, Dreuw A, Bunz UHF. Synthesis and Properties of Functional Twisted Tolanes. Chemistry 2017; 23:9908-9918. [DOI: 10.1002/chem.201701519] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Yury Kozhemyakin
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Andreas Kretzschmar
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Maximilian Krämer
- Interdisziplinäres Zentrum für Wissenschaftliches Rechnen; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 205 69120 Heidelberg Germany
| | - Frank Rominger
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Andreas Dreuw
- Interdisziplinäres Zentrum für Wissenschaftliches Rechnen; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 205 69120 Heidelberg Germany
- Centre for Advanced Materials; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 225 69120 Heidelberg Germany
| | - Uwe H. F. Bunz
- Organisch-Chemisches Institut; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
- Centre for Advanced Materials; Ruprecht-Karls-Universität Heidelberg; Im Neuenheimer Feld 225 69120 Heidelberg Germany
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6
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Szyszkowska M, Czaplewski C, Wiczk W. Photophysical and theoretical studies of diphenylacetylene derivatives with restricted rotation. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.02.096] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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7
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Sharber SA, Baral RN, Frausto Arellano F, Haas TE, Müller P, Thomas Iii SW. Substituent Effects That Control Conjugated Oligomer Conformation through Non-covalent Interactions. J Am Chem Soc 2017; 139:5164-5174. [PMID: 28362486 DOI: 10.1021/jacs.7b00878] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Although understanding the conformations and arrangements of conjugated materials as solids is key to their prospective applications, predictive power over these structural factors remains elusive. In this work, substituent effects tune non-covalent interactions between side-chain fluorinated benzyl esters and main-chain terminal arenes, in turn controlling the conformations and interchromophore aggregation of three-ring phenylene-ethynylenes (PEs). Cofacial fluoroarene-arene (ArF-ArH) interactions cause twisting in the PE backbone, interrupting intramolecular conjugation as well as blocking chromophore aggregation, both of which prevent the typically observed bathochromic shift observed upon transitioning PEs from solution to solid. This work highlights two structural factors that determine whether the ArF-ArH interactions, and the resulting twisted, unaggregated chromophores, occur in these solids: (i) the electron-releasing characteristic of substituents on ArH, with more electron-releasing character favoring ArF-ArH interactions, and (ii) the fluorination pattern of the ArF ring, with 2,3,4,5,6-pentafluorophenyl favoring ArF-ArH interactions over 2,4,6-trifluorophenyl. These trends indicate that considerations of electrostatic complementarity, whether through a polar-π or substituent-substituent mechanism, can serve as an effective design principle in controlling the interaction strengths, and therefore the optoelectronic properties, of these molecules as solids.
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Affiliation(s)
- Seth A Sharber
- Department of Chemistry, Tufts University , Medford, Massachusetts 02155, United States
| | - Rom Nath Baral
- Department of Chemistry, Tufts University , Medford, Massachusetts 02155, United States
| | | | - Terry E Haas
- Department of Chemistry, Tufts University , Medford, Massachusetts 02155, United States
| | - Peter Müller
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
| | - Samuel W Thomas Iii
- Department of Chemistry, Tufts University , Medford, Massachusetts 02155, United States
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8
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Abstract
Diphenylacetylene (tolane) exhibits a rich photochemistry that depends on the relative orientation of the phenyl rings and the external conditions. Here, state-of-the-art quantum chemical methods based on the algebraic diagrammatic construction scheme for a polarization propagator of second order are employed to investigate the luminescence properties of tolane and its derivatives. It is explained why different derivatives of tolane exhibit different absorption but practically identical fluorescence spectra, why the fluorescence quantum yield and the population of a "dark" state are temperature-dependent, and why initially twisted tolanophanes phosphoresce in glassy media at 77 K while planar ones do not.
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Affiliation(s)
- Maximilian Krämer
- Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 205, 69120 Heidelberg, Germany
| | - Uwe H F Bunz
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.,Centre for Advanced Materials (CAM) , Im Neuenheimer Feld 225, 69120 Heidelberg, Germany
| | - Andreas Dreuw
- Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 205, 69120 Heidelberg, Germany.,Centre for Advanced Materials (CAM) , Im Neuenheimer Feld 225, 69120 Heidelberg, Germany
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9
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Hong JH, Atta AK, Jung KB, Kim SB, Heo J, Cho DG. Conformationally Locked Tolans, β-Sheet Structures, and Photophysical Properties. Org Lett 2015; 17:6222-5. [PMID: 26633286 DOI: 10.1021/acs.orglett.5b03205] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Conformationally locked tetrasubstituted tolans were synthesized by introducing a tether on the tolan. To demonstrate the utilities of these motifs, a β-hairpin structure (15) was synthesized, and its additional stabilizing effects were evaluated. Moreover, the photophysical properties of cyclic tolans and their β-sheet structure were investigated. The fluorescence quantum yield of cyclic tolan 12 is >1000 times stronger than its congener 1 in CH3CN.
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Affiliation(s)
- Jung-Ho Hong
- Department of Chemistry, Inha University , 253 Yonghyundong, Namgu, Incheon 402-751, Republic of Korea
| | - Ananta Kumar Atta
- Department of Chemistry, Inha University , 253 Yonghyundong, Namgu, Incheon 402-751, Republic of Korea
| | - Kwang-Bok Jung
- Department of Chemistry, Inha University , 253 Yonghyundong, Namgu, Incheon 402-751, Republic of Korea
| | - Seul-Bi Kim
- Department of Chemistry, Inha University , 253 Yonghyundong, Namgu, Incheon 402-751, Republic of Korea
| | - Jungseok Heo
- Department of Chemistry, Chungnam National University , 99 Daehak-ro, Yuseong-go, Daejeon 305-764, Republic of Korea
| | - Dong-Gyu Cho
- Department of Chemistry, Inha University , 253 Yonghyundong, Namgu, Incheon 402-751, Republic of Korea
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10
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Lin CJ, Kundu SK, Lin CK, Yang JS. Conformational Control of Oligo(p-phenyleneethynylene)s with Intrinsic Substituent Electronic Effects: Origin of the Twist in Pentiptycene-Containing Systems. Chemistry 2014; 20:14826-33. [DOI: 10.1002/chem.201403795] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Indexed: 11/09/2022]
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11
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Menning S, Krämer M, Duckworth A, Rominger F, Beeby A, Dreuw A, Bunz UHF. Bridged tolanes: a twisted tale. J Org Chem 2014; 79:6571-8. [PMID: 24937689 DOI: 10.1021/jo5010235] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The rotational motion of tolanes along their acetylene axis is not fully understood. What happens to the optical and electronic properties if the tolane backbone is forced into a twisted conformation? Several tethers were investigated to obtain tolanophanes, fixing the torsion angle of the two phenyl rings. X-ray crystal structures revealed tether-specific torsion angles in the solid state. The absorption, emission, and excitation spectra were recorded. Twisted tethered tolane conformers showed blue-shifted absorption; emission spectra were all torsionally independent and identical. The tethered tolanes were embedded in a rigid matrix by freezing to 77 K; well-resolved emission spectra were recorded for planar tolanes, but for twisted systems unexpectedly long-lived phosphorescence was observed. How is this triplet emission explained? Quantum chemical calculations (TDDFT/cam-B3LYP/6-31G*) of the unsubstituted tolane showed that intersystem crossing (ISC) is favored with large spin-orbit coupling, which occurs when the molecular orbitals are orthogonal to each other; this is the case at the crossing of S1/T7. Also, a small energy difference between singlet and triplet states is required; we found that ISC can favorably take place at four crossings: S1/T6, S1/T7, S1/T(8,9), S1/T10.
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Affiliation(s)
- Sebastian Menning
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg , Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
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12
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Misra R, Maragani R, Jadhav T, Mobin SM. Ferrocenyl end capped molecular rods: synthesis, structure, and properties. NEW J CHEM 2014. [DOI: 10.1039/c3nj01244a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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13
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Baxter PNW, Gisselbrecht JP, Karmazin-Brelot L, Varnek A, Allouche L. Synthesis of a Strained Acetylenic Macrocycle Incorporating apara-Oligo[2]cruciform Bridge Bent over Nanoscopic Dimensions: Structural, Electronic, Spectroscopic, and Ion-Sensing Properties. Chemistry 2013; 19:12336-49. [DOI: 10.1002/chem.201204569] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2012] [Indexed: 11/12/2022]
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14
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Shao C, Stolte M, Würthner F. Quadruple π Stack of Two Perylene Bisimide Tweezers: A Bimolecular Complex with Kinetic Stability. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201302479] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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15
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Shao C, Stolte M, Würthner F. Quadruple π stack of two perylene bisimide tweezers: a bimolecular complex with kinetic stability. Angew Chem Int Ed Engl 2013; 52:7482-6. [PMID: 23757369 DOI: 10.1002/anie.201302479] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Indexed: 11/07/2022]
Abstract
Self-assembly: A tweezer-type perylene bisimide (PBI) dyad self-assembles into a defined bimolecular complex composed of a quadruple PBI π stack with remarkable kinetic stability, which is unprecedented for π-stacked dye aggregates (see picture). These persistent supramolecular species are of considerable interest for the elucidation of functional properties of dye aggregates.
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Affiliation(s)
- Changzhun Shao
- Universität Würzburg, Institut für Organische Chemie and Center for Nanosystems Chemistry, Am Hubland, 97074 Würzburg, Germany
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16
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Menning S, Krämer M, Coombs BA, Rominger F, Beeby A, Dreuw A, Bunz UHF. Twisted Tethered Tolanes: Unanticipated Long-Lived Phosphorescence at 77 K. J Am Chem Soc 2013; 135:2160-3. [DOI: 10.1021/ja400416r] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sebastian Menning
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer
Feld 270, 69120 Heidelberg, Germany
| | - Maximilian Krämer
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer
Feld 270, 69120 Heidelberg, Germany
- Interdisziplinäres Zentrum
für Wissenschaftliches Rechnen, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 368, 69120 Heidelberg,
Germany
| | - Benjamin A. Coombs
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, U.K
| | - Frank Rominger
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer
Feld 270, 69120 Heidelberg, Germany
| | - Andrew Beeby
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, U.K
| | - Andreas Dreuw
- Interdisziplinäres Zentrum
für Wissenschaftliches Rechnen, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 368, 69120 Heidelberg,
Germany
| | - Uwe H. F. Bunz
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer
Feld 270, 69120 Heidelberg, Germany
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17
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Melen RL, Lough AJ, Stephan DW. Boron azides in Staudinger oxidations and cycloadditions. Dalton Trans 2013; 42:8674-83. [DOI: 10.1039/c3dt50791b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Xu YX, Zhan TG, Zhao X, Fang Q, Jiang XK, Li ZT. Oligo(quinoxalineethynylene)s: synthesis, properties, and Ag+-mediated complanation. Chem Commun (Camb) 2010; 47:1524-6. [PMID: 21113515 DOI: 10.1039/c0cc03501g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of oligo(quinoxalineethylene)s which exhibit n-type semi-conducting features were synthesized, and adding Ag(+) to their solutions induced the backbones to adopt coplanar conformations due to Ag(+)-N coordination.
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Affiliation(s)
- Yun-Xiang Xu
- State Key Lab of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China
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19
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Affiliation(s)
- Shinji Toyota
- Department of Chemistry, Faculty of Science, Okayama University of Science, 1-1 Ridaicho, Kita-ku, Okayama 700-0005, Japan
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20
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Swinburne A, Paterson M, Beeby A, Steed J. Fluorescent ‘Twist-on’ Sensing by Induced-Fit Anion Stabilisation of a Planar Chromophore. Chemistry 2010; 16:2714-8. [DOI: 10.1002/chem.200903293] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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21
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Yang JS, Yan JL, Liau KL, Tsai HHG, Hwang CY. Substituent effect on the ground- and excited-state torsional motions of pentiptycene-derived 1,4-bis(phenylethynyl)benzenes. J Photochem Photobiol A Chem 2009. [DOI: 10.1016/j.jphotochem.2009.01.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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22
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Nakayama H, Kimura S. Chirally Twisted Oligo(phenyleneethynylene) by Cyclization with α-Helical Peptide. J Org Chem 2009; 74:3462-8. [DOI: 10.1021/jo9001905] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hidenori Nakayama
- Graduate School of Engineering, Kyoto University, Kyoto-Daigaku-Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Shunsaku Kimura
- Graduate School of Engineering, Kyoto University, Kyoto-Daigaku-Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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23
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Yamashita KI, Sato KI, Kawano M, Fujita M. Photo-induced self-assembly of Pt(ii)-linked rings and cages via the photolabilization of a Pt(ii)–py bond. NEW J CHEM 2009. [DOI: 10.1039/b817713a] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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de Quadras L, Shelton AH, Kuhn H, Hampel F, Schanze KS, Gladysz JA. Syntheses, Structures, and Electronic and Photophysical Properties of Unsymmetrically Substituted Butadiynediyl and Hexatriynediyl Complexes Derived from (C6F5)(R3P)2Pt, (p-tol)(R3P)2Pt, and (Ph3P)Au End-Groups. Organometallics 2008. [DOI: 10.1021/om800493x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Laura de Quadras
- Institut für Organische Chemie and Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, 91054 Erlangen, Germany, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, and Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012
| | - Abigail H. Shelton
- Institut für Organische Chemie and Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, 91054 Erlangen, Germany, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, and Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012
| | - Helene Kuhn
- Institut für Organische Chemie and Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, 91054 Erlangen, Germany, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, and Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012
| | - Frank Hampel
- Institut für Organische Chemie and Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, 91054 Erlangen, Germany, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, and Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012
| | - Kirk S. Schanze
- Institut für Organische Chemie and Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, 91054 Erlangen, Germany, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, and Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012
| | - John A. Gladysz
- Institut für Organische Chemie and Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, 91054 Erlangen, Germany, Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611, and Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012
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25
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Hu W, Zhu N, Tang W, Zhao D. Oligo(p-phenyleneethynylene)s with Hydrogen-Bonded Coplanar Conformation. Org Lett 2008; 10:2669-72. [DOI: 10.1021/ol800753z] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wei Hu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Department of Applied Chemistry and the Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Ningbo Zhu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Department of Applied Chemistry and the Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Wen Tang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Department of Applied Chemistry and the Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Dahui Zhao
- Beijing National Laboratory for Molecular Sciences (BNLMS), Department of Applied Chemistry and the Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
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26
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Conformational study of a strained tolanophane by dynamic 1H NMR spectroscopy and computational methods. MONATSHEFTE FUR CHEMIE 2008. [DOI: 10.1007/s00706-008-0912-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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27
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Darabi HR, Jadidi K, Mohebbi AR, Faraji L, Aghapoor K, Shahbazian S, Azimzadeh M, Nasseri SM. A Simple and Convenient Strategy for the Synthesis of Tolanophanes: Synthesis, Characterization and Conformational Analysis of a Novel Tolanophane. Supramol Chem 2008. [DOI: 10.1080/10610270701258642] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Hossein Reza Darabi
- a Chemistry & Chemical Engineering Research Center of Iran (CCERCI) , P.O. Box 14335-186, Tehran, Iran
| | - Khosrow Jadidi
- b Chemistry Department , Faculty of Science, Shahid Beheshti University , P.O. Box 19395-4716, Tehran, Iran
| | - Ali Reza Mohebbi
- a Chemistry & Chemical Engineering Research Center of Iran (CCERCI) , P.O. Box 14335-186, Tehran, Iran
| | - Laleh Faraji
- b Chemistry Department , Faculty of Science, Shahid Beheshti University , P.O. Box 19395-4716, Tehran, Iran
| | - Kioumars Aghapoor
- a Chemistry & Chemical Engineering Research Center of Iran (CCERCI) , P.O. Box 14335-186, Tehran, Iran
| | - Shant Shahbazian
- b Chemistry Department , Faculty of Science, Shahid Beheshti University , P.O. Box 19395-4716, Tehran, Iran
| | - Marjan Azimzadeh
- a Chemistry & Chemical Engineering Research Center of Iran (CCERCI) , P.O. Box 14335-186, Tehran, Iran
| | - Sareh M. Nasseri
- a Chemistry & Chemical Engineering Research Center of Iran (CCERCI) , P.O. Box 14335-186, Tehran, Iran
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28
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Beer S, Brandhorst K, Grunenberg J, Hrib CG, Jones PG, Tamm M. Preparation of Cyclophanes by Room-Temperature Ring-Closing Alkyne Metathesis with Imidazolin-2-iminato Tungsten Alkylidyne Complexes. Org Lett 2008; 10:981-4. [DOI: 10.1021/ol800154y] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stephan Beer
- Institut für Anorganische und Analytische Chemie and Institut für Organische Chemie, Technische Universität Carolo-Wilhelmina, Hagenring 30, D-38106 Braunschweig, Germany
| | - Kai Brandhorst
- Institut für Anorganische und Analytische Chemie and Institut für Organische Chemie, Technische Universität Carolo-Wilhelmina, Hagenring 30, D-38106 Braunschweig, Germany
| | - Jörg Grunenberg
- Institut für Anorganische und Analytische Chemie and Institut für Organische Chemie, Technische Universität Carolo-Wilhelmina, Hagenring 30, D-38106 Braunschweig, Germany
| | - Cristian G. Hrib
- Institut für Anorganische und Analytische Chemie and Institut für Organische Chemie, Technische Universität Carolo-Wilhelmina, Hagenring 30, D-38106 Braunschweig, Germany
| | - Peter G. Jones
- Institut für Anorganische und Analytische Chemie and Institut für Organische Chemie, Technische Universität Carolo-Wilhelmina, Hagenring 30, D-38106 Braunschweig, Germany
| | - Matthias Tamm
- Institut für Anorganische und Analytische Chemie and Institut für Organische Chemie, Technische Universität Carolo-Wilhelmina, Hagenring 30, D-38106 Braunschweig, Germany
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29
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Owen G, Stahl J, Hampel F, Gladysz J. Coordination-Driven Self-Assembly, Structures, and Dynamic Properties of Diplatinum Hexatriynediyl and Butadiynediyl Complexes in which the sp Carbon Chains are Shielded by sp3Carbon Chains: Towards Endgroup-Endgroup Interactions. Chemistry 2007; 14:73-87. [DOI: 10.1002/chem.200701268] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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30
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Terashima T, Nakashima T, Kawai T. Engineering Control over the Conformation of the Alkyne−Aryl Bond by the Introduction of Cationic Charge. Org Lett 2007; 9:4195-8. [PMID: 17877361 DOI: 10.1021/ol7016966] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel arylene-ethynylene molecule has been synthesized. This molecule is more stable in a coplanar form than in a twisted form as in the cases of typical arylene-ethynylene molecules. When the cationic charge was introduced into the pi-conjugated system, the perpendicularly twisted form became more stable than the coplanar state. The conformational change was controlled by introduction and removal of cationic charge, confirmed by the absorption and fluorescence spectroscopy and DFT calculation.
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Affiliation(s)
- Takashi Terashima
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan
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31
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Beeby A, Findlay KS, Goeta AE, Porrès L, Rutter SR, Thompson AL. Engineering a twist in 9,10-diethynylanthracenes by steric interactions. Photochem Photobiol Sci 2007; 6:982-6. [PMID: 17721597 DOI: 10.1039/b707750e] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of 9,10-bis(phenylethynyl)anthracenes decorated with sterically demanding tert-butyl substituents have been prepared and spectroscopically characterised. We demonstrate that the introduction of two bulky substituents in the ortho position of the phenyl rings effectively locks the ground state into a conformation in which the three rings are orthogonal. Fluorescence spectroscopy reveals evidence for partial planarisation of this compound in the excited state at ambient temperature, but this is prevented in low temperature solvent glasses.
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Affiliation(s)
- Andrew Beeby
- Department of Chemistry, University of Durham, Durham, UK.
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32
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Yamashita KI, Kawano M, Fujita M. Ru(ii)-cornered coordination cage that senses guest inclusion by color change. Chem Commun (Camb) 2007:4102-3. [DOI: 10.1039/b712529a] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Yang JS, Yan JL, Hwang CY, Chiou SY, Liau KL, Gavin Tsai HH, Lee GH, Peng SM. Probing the Intrachain and Interchain Effects on the Fluorescence Behavior of Pentiptycene-Derived Oligo(p-phenyleneethynylene)s. J Am Chem Soc 2006; 128:14109-19. [PMID: 17061894 DOI: 10.1021/ja0640389] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The synthesis, crystal structure, and fluorescence behavior of acetylene-bridged pentiptycene dimer (2), trimer (3), and tetramer (4) are reported. For comparison, a phenylene-pentiptycene-phenylene three-ring system (5) is also investigated. As a result of the unique intrachain pentiptycene-pentiptycene interactions in 3 and 4, their twisted conformers are populated in polar solvents and at low temperatures, and the phenomenon of nonequilibration of excited rotational conformers is observed. Twisting of the pi-conjugated backbones leads to blue-shifted absorption and fluorescence spectra and increased fluorescence quantum yields and lifetimes. The fluorescence spectra of 2-4 undergo small red shifts but large intensity variations in the 0-1 vs 0-0 bands on going from solutions to thin solid films, which can be accounted for by the reabsorption effect. However, the reduction in fluorescence quantum yields for 2-4 in films vs solutions is mainly attributed to efficient interchain exciton migration to nonfluorescent energy traps. In contrast, the behavior of nonequilibration of excited rotamers is not observed for 5 in solutions. Compound 5 forms J-type aggregates through terminal phenylene pi-stackings in the solid state, resulting in a new absorption band at 377 nm and large red shifts of the structured fluorescence spectra.
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Affiliation(s)
- Jye-Shane Yang
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 10617.
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34
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Shukla R, Brody DM, Lindeman SV, Rathore R. A Practical Synthesis of Bridged Diarylacetylenes. J Org Chem 2006; 71:6124-9. [PMID: 16872195 DOI: 10.1021/jo060817w] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient and practical synthesis of bridged diarylacetylenes in multigram quantities has been successfully carried out using high-yielding (classical) synthetic methods and readily available starting materials. The structural analysis of the representative bridged diarylacetylenes by X-ray crystallography strongly suggests that conformations, bending of the linear triple bond, and the angle between the mean planes of aromatic rings in various bridged diarylacetylenes are governed by the p-pi conjugation among the aromatic rings and the ethereal groups. Furthermore, the synthetic scheme also allows the preparation of (appropriately) bromo-substituted bridged diarylacetylenes which hold potential for their future usage for the preparation of polymeric analogues as well as the hexaarylbenzene derivatives for potential applications in the emerging area of molecular electronics and nanotechnology.
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Affiliation(s)
- Ruchi Shukla
- Department of Chemistry, Marquette University, P.O. Box 1881, Milwaukee, Wisconsin 53201-1881, USA
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35
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Ahn TS, Thompson AL, Bharathi P, Müller A, Bardeen CJ. Light-Harvesting in Carbonyl-Terminated Phenylacetylene Dendrimers: The Role of Delocalized Excited States and the Scaling of Light-Harvesting Efficiency with Dendrimer Size. J Phys Chem B 2006; 110:19810-9. [PMID: 17020366 DOI: 10.1021/jp056831e] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The photophysics of a family of conjugated phenylacetylene (PA) light-harvesting dendrimers are studied using steady-state and time-resolved optical spectroscopy. The dendrimers consist of a substituted PA core surrounded by meta-branched PA arms. The total number of PA moieties ranges from 3 (first generation) to 63 (fifth generation). By using an alcohol/ketone substituent at the dendrimer core, we avoid through-space Forster transfer from the peripheral PA donors to the core acceptor (in this case, the carbonyl group), which simplifies the analysis of these molecules relative to the perylene-terminated molecules studied previously. The delocalized excited states previously identified in smaller dendrons are seen in these larger dendrimers as well, and their influence on the intersite electronic energy transfer (EET) is analyzed in terms of a point-dipole Forster model. We find that these new delocalized states can both enhance EET (by decreasing the spatial separation between donor and acceptor) and degrade it (by lowering the emission cross section and shifting the energy, resulting in poorer spectral overlap between donor and acceptor). The combination of these two effects leads to a calculated intersite transfer time of 6 ps, in reasonable agreement with the 5-17 ps range obtained from experiment. In addition to characterizing the electronic states and intersite energy transfer times, we also examine how the overall light-harvesting efficiency scales with dendrimer size. After taking the size dependence of other nonradiative processes, such as excimer formation, into account, the overall dendrimer quenching rate k(Q) is found to decrease exponentially with dendrimer size over the first four generations. This exponential decrease is predicted by simple theoretical considerations and by kinetic models, but the dependence on generation is steeper than expected based on those models, probably due to increased disorder in the larger dendrimers. We discuss the implications of these results for dendrimeric light-harvesting structures based on PA and other chemical motifs.
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Affiliation(s)
- Tai Sang Ahn
- Department of Chemistry, University of California, Riverside, Riverside, California 92521, USA
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36
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Shukla R, Lindeman SV, Rathore R. A Polyaromatic Receptor with an Ethereal Fence that Directs K+ for Effective Cation−π Interaction. J Am Chem Soc 2006; 128:5328-9. [PMID: 16620089 DOI: 10.1021/ja060502y] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We have designed and synthesized a HAB-based receptor with six ethereal oxygens on one face of the central benzene ring by a trimerization of a diarylacetylene in which the ethereal oxygens are tied together with a tetramethylene bridge. This unique amphiphilic receptor allows an efficient binding of a single potassium cation by a synergistic interaction with the polar ethereal fence and with the central benzene ring via cation-pi interaction. Furthermore, the ready accessibility of this unique receptor with a bipolar binding pocket will allow the exploration of its usage for developing efficient sensing devices for various metal cations.
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Affiliation(s)
- Ruchi Shukla
- Department of Chemistry, Marquette University, P.O. Box 1881, Milwaukee, Wisconsin 53201-1881, USA
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38
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Greaves SJ, Flynn EL, Futcher EL, Wrede E, Lydon DP, Low PJ, Rutter SR, Beeby A. Cavity Ring-Down Spectroscopy of the Torsional Motions of 1,4-Bis(phenylethynyl)benzene. J Phys Chem A 2006; 110:2114-21. [PMID: 16466245 DOI: 10.1021/jp054426h] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The torsional motions of jet-cooled 1,4-bis(phenylethynyl)benzene (BPEB), a prototype molecular wire, were studied using cavity ring-down spectroscopy in the first UV absorption band (316-321 nm). The torsional spectrum of 1,4-bis(phenylethynyl)-2,3,5,6-tetradeuteriobenzene was also recorded in the gas phase. Both spectra were successfully simulated using simple cosine potentials to describe the torsional motions. The ground-state barrier to rotation was estimated to be 220-235 cm(-1), which is similar to that of diphenylacetylene (tolane). Complementary DFT calculations were found to overestimate the torsional barrier.
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Affiliation(s)
- Stuart J Greaves
- University of Durham, Department of Chemistry, South Road, Durham DH1 3LE, UK
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39
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Miljanić OS, Han S, Holmes D, Schaller GR, Vollhardt KPC. Hindered rotation in an "exploded" biphenyl. Chem Commun (Camb) 2005:2606-8. [PMID: 15900342 DOI: 10.1039/b503173g] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first cases of hindered rotation around the triple bond in simple diphenylacetylenes were observed, including that in chiral 2,2'-bis(trimethylsilyl)-6,6'-bis(dimethylthexylsilyl)diphenylacetylene.
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Affiliation(s)
- Ognjen S Miljanić
- Center for New Directions in Organic Synthesis, Department of Chemistry, University of California at Berkeley, and the Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720-1460, USA
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40
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Newkome GR. Chapter 8 Eight-membered and larger rings. A CRITICAL REVIEW OF THE 2003 LITERATURE PRECEDED BY TWO CHAPTERS ON CURRENT HETEROCYCLIC TOPICS 2005. [DOI: 10.1016/s0959-6380(05)80059-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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41
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Lydon DP, Porrès L, Beeby A, Marder TB, Low PJ. A simple “palladium-free” synthesis of phenyleneethynylene-based molecular materials revisited. NEW J CHEM 2005. [DOI: 10.1039/b502950c] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Abstract
This review discusses the emergence of alkyne metathesis as a valuable synthetic tool applicable in the synthesis of complex molecules and polymer science.
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Affiliation(s)
- Alois Furstner
- Max-Planck-Institut fur Kohlenforschung, D-45470 Mulheim/Ruhr, Germany.
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43
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Englert BC, Smith MD, Hardcastle KI, Bunz UHF. Jacketed Poly(p-phenyleneethynylene)s: Nonaggregating Conjugated Polymers as Blue-Emitting Rods. Macromolecules 2004. [DOI: 10.1021/ma048535q] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Brian C. Englert
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332; Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208; and Department of Chemistry, Emory University, 1515 Pierce Drive, Atlanta, Georgia 30322
| | - Mark D. Smith
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332; Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208; and Department of Chemistry, Emory University, 1515 Pierce Drive, Atlanta, Georgia 30322
| | - Kenneth I. Hardcastle
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332; Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208; and Department of Chemistry, Emory University, 1515 Pierce Drive, Atlanta, Georgia 30322
| | - Uwe H. F. Bunz
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332; Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208; and Department of Chemistry, Emory University, 1515 Pierce Drive, Atlanta, Georgia 30322
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44
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45
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(E)-Cycloalkenes and (E,E)-cycloalkadienes by ring closing diyne- or enyne–yne metathesis/semi-reduction. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.05.042] [Citation(s) in RCA: 102] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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