1
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Peddi S, Livieri JM, Vemuri GN, Hartley CS. Engineering Chiral Induction in Centrally Functionalized o-Phenylenes. J Org Chem 2023; 88:788-795. [PMID: 36602975 DOI: 10.1021/acs.joc.2c01870] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Work on foldamers, nonbiological oligomers that mimic the hierarchical structure of biomacromolecules, continues to yield new architectures of ever increasing complexity. o-Phenylenes, a class of helical aromatic foldamers, are well-suited to this area because of their structural simplicity and the straightforward characterization of their folding in solution. However, control of structure requires, by definition, control over folding handedness. Control over o-phenylene twist sense is currently lacking. While chiral induction from groups at o-phenylene termini has been demonstrated, it would be useful to instead direct twisting from internal positions to leave the ends free. Here, we explore chiral induction in a series of o-phenylenes with chiral imides at their centers. Conformational behavior has been studied by nuclear magnetic resonance and circular dichroism spectroscopies and density functional theory calculations. Chiral induction in otherwise unfunctionalized o-phenylenes is generally poor. However, strategic functionalization of the helix surface with trifluoromethyl or methyl groups allows it to better interact with the imide groups, greatly increasing diastereomeric excesses. The sense of chiral induction is consistent with computational models that suggest that it primarily arises from a steric effect.
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Affiliation(s)
- Sumalatha Peddi
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
| | - Juliana M Livieri
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
| | - Gopi Nath Vemuri
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
| | - C Scott Hartley
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
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2
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Kawata T, Sonobe M, Morikawa D, Kitazawa Y, Nomura Y, Uchiyama M, Kimura M. Phosphorescence emission from spatial stacks of phenanthrene units in oligo(9,10-phenanthrene)s. Chem Commun (Camb) 2022; 59:231-234. [PMID: 36484249 DOI: 10.1039/d2cc05414k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The covalent linkage of phenanthrene units at 9 and 10 positions resulted in a broadening of the absorption band and a red-shift of the fluorescence band in ethanol compared with its monomer. Spatial stacking of phenanthrene units also altered the spectral shape of phosphorescence emission, and the oligomer film emitted phosphorescence at room temperature.
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Affiliation(s)
- Takahiro Kawata
- Department of Chemistry and Materials, Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Ueda, Nagano 386-8567, Japan.
| | - Masahiro Sonobe
- Department of Chemistry and Materials, Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Ueda, Nagano 386-8567, Japan.
| | - Dai Morikawa
- Research Initiative for Supra-Materials (RISM), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, Japan
| | - Yu Kitazawa
- Research Initiative for Supra-Materials (RISM), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, Japan
| | - Yasushi Nomura
- Department of Chemistry and Materials, Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Ueda, Nagano 386-8567, Japan.
| | - Masanobu Uchiyama
- Research Initiative for Supra-Materials (RISM), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, Japan.,Advanced Elements Chemistry Laboratory, Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Mutsumi Kimura
- Department of Chemistry and Materials, Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Ueda, Nagano 386-8567, Japan. .,Research Initiative for Supra-Materials (RISM), Interdisciplinary Cluster for Cutting Edge Research (ICCER), Shinshu University, Japan
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3
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Miller KA, Dodo OJ, Devkota GP, Kirinda VC, Bradford KGE, Sparks J, Hartley CS, Konkolewicz D. Aromatic Foldamers as Molecular Springs in Network Polymers. Chem Commun (Camb) 2022; 58:5590-5593. [DOI: 10.1039/d2cc01223e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polymer networks crosslinked with spring-like ortho-phenylene (oP) foldamers were developed. NMR analysis indicated the oP crosslinkers were well-folded. Polymer networks with oP-based crosslinkers showed enhanced energy dissipation and elasticity compared...
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4
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Abstract
The self-assembly of foldamers into macrocycles is a simple approach to non-biological higher-order structure. Previous work on the co-assembly of ortho-phenylene foldamers with rod-shaped linkers has shown that folding and self-assembly affect each other; that is, the combination leads to new emergent behavior, such as access to otherwise unfavorable folding states. To this point this relationship has been passive. Here, we demonstrate control of self-assembly by manipulating the foldamers' conformational energy surfaces. A series of o-phenylene decamers and octamers have been assembled into macrocycles using imine condensation. Product distributions were analyzed by gel-permeation chromatography and molecular geometries extracted from a combination of NMR spectroscopy and computational chemistry. The assembly of o-phenylene decamers functionalized with alkoxy groups or hydrogens gives both [2 + 2] and [3 + 3] macrocycles. The mixture results from a subtle balance of entropic and enthalpic effects in these systems: the smaller [2 + 2] macrocycles are entropically favored but require the oligomer to misfold, whereas a perfectly folded decamer fits well within the larger [3 + 3] macrocycle that is entropically disfavored. Changing the substituents to fluoro groups, however, shifts assembly quantitatively to the [3 + 3] macrocycle products, even though the structural changes are well-removed from the functional groups directly participating in bond formation. The electron-withdrawing groups favor folding in these systems by strengthening arene–arene stacking interactions, increasing the enthalpic penalty to misfolding. The architectural changes are substantial even though the chemical perturbation is small: analogous o-phenylene octamers do not fit within macrocycles when perfectly folded, and quantitatively misfold to give small macrocycles regardless of substitution. Taken together, these results represent both a high level of structural control in structurally complex foldamer systems and the demonstration of large-amplitude structural changes as a consequence of a small structural effects. The folding propensity of ortho-phenylene foldamers dictates the outcome of their self-assembly into macrocycles.![]()
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Affiliation(s)
- Viraj C Kirinda
- Department of Chemistry & Biochemistry, Miami University Oxford OH 45056 USA
| | - C Scott Hartley
- Department of Chemistry & Biochemistry, Miami University Oxford OH 45056 USA
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5
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Lee M, Kang SI, Song S, Kim H, Lee D. Sharp Turns and Fluorescent Repeats: Modular Construction and Shape-Dependent Electronic Properties of π-Conjugated Chain Molecules. Chempluschem 2021; 86:313-318. [PMID: 33620771 DOI: 10.1002/cplu.202000818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/05/2021] [Indexed: 11/07/2022]
Abstract
In search of the design rules for structural ordering of open-chain molecules, we have built a series of zig-zag shaped π-conjugated structures with ring-fused heteroaromatics as sharp turns and tolane-based linear fragments as light-emitting units. Using only a finite number of common building blocks, an efficient "double-elongation" strategy was implemented to construct a series of π-conjugated oligomers with precise length control (55-89 % yields). Our approach takes advantage of the modular nature of the bis(triazolo)benzene synthesis and the masked reactivity of the nitro group. A combination of photophysical and DFT computational studies revealed that the bis(triazolo)benzene-tolane repeat units behave as electronically decoupled light-absorbing/emitting units (λmax,em = 408-422 nm; ΦF = 20-25 % in THF). Such context-independent photophysical properties promise their potential applications in chemical sensing and switching.
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Affiliation(s)
- Milim Lee
- Department of Chemistry, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Suk-Il Kang
- Department of Chemistry, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Sungmin Song
- Department of Chemistry, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Hongsik Kim
- Department of Chemistry, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Dongwhan Lee
- Department of Chemistry, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
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6
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Li J, Shen P, Zhen S, Tang C, Ye Y, Zhou D, Hong W, Zhao Z, Tang BZ. Mechanical single-molecule potentiometers with large switching factors from ortho-pentaphenylene foldamers. Nat Commun 2021; 12:167. [PMID: 33420002 PMCID: PMC7794330 DOI: 10.1038/s41467-020-20311-z] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 11/24/2020] [Indexed: 11/22/2022] Open
Abstract
Molecular potentiometers that can indicate displacement-conductance relationship, and predict and control molecular conductance are of significant importance but rarely developed. Herein, single-molecule potentiometers are designed based on ortho-pentaphenylene. The ortho-pentaphenylene derivatives with anchoring groups adopt multiple folded conformers and undergo conformational interconversion in solutions. Solvent-sensitive multiple conductance originating from different conformers is recorded by scanning tunneling microscopy break junction technique. These pseudo-elastic folded molecules can be stretched and compressed by mechanical force along with a variable conductance by up to two orders of magnitude, providing an impressively higher switching factor (114) than the reported values (ca. 1~25). The multichannel conductance governed by through-space and through-bond conducting pathways is rationalized as the charge transport mechanism for the folded ortho-pentaphenylene derivatives. These findings shed light on exploring robust single-molecule potentiometers based on helical structures, and are conducive to fundamental understanding of charge transport in higher-order helical molecules.
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Affiliation(s)
- Jinshi Li
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, 510640, Guangzhou, China
| | - Pingchuan Shen
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, 510640, Guangzhou, China
| | - Shijie Zhen
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, 510640, Guangzhou, China
| | - Chun Tang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China
| | - Yiling Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China
| | - Dahai Zhou
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China
| | - Wenjing Hong
- State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, 361005, Xiamen, China.
| | - Zujin Zhao
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, 510640, Guangzhou, China.
| | - Ben Zhong Tang
- State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, South China University of Technology, 510640, Guangzhou, China
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China
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7
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Kinney ZJ, Kirinda VC, Hartley CS. Macrocycles of higher ortho-phenylenes: assembly and folding. Chem Sci 2019; 10:9057-9068. [PMID: 31762983 PMCID: PMC6857672 DOI: 10.1039/c9sc02975c] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 08/09/2019] [Indexed: 01/24/2023] Open
Abstract
The sizes and geometries of macrocycles assembled from ortho-phenylenes are predicted by the stabilities and bite angles of possible conformers.
Higher-order structure in abiotic foldamer systems represents an important but largely unrealized goal. As one approach to this challenge, covalent assembly can be used to assemble macrocycles with foldamer subunits in well-defined spatial relationships. Such systems have previously been shown to exhibit self-sorting, new folding motifs, and dynamic stereoisomerism, yet there remain important questions about the interplay between folding and macrocyclization and the effect of structural confinement on folding behavior. Here, we explore the dynamic covalent assembly of extended ortho-phenylenes (hexamer and decamer) with rod-shaped linkers. Characteristic 1H chemical shift differences between cyclic and acyclic systems can be compared with computational conformer libraries to determine the folding states of the macrocycles. We show that the bite angle provides a measure of the fit of an o-phenylene conformer within a shape-persistent macrocycle, affecting both assembly and ultimate folding behavior. For the o-phenylene hexamer, the bite angle and conformer stability work synergistically to direct assembly toward triangular [3 + 3] macrocycles of well-folded oligomers. For the decamer, the energetic accessibility of conformers with small bite angles allows [2 + 2] macrocycles to be formed as the predominant species. In these systems, the o-phenylenes are forced into unusual folding states, preferentially adopting a backbone geometry with distinct helical blocks of opposite handedness. The results show that simple geometric restrictions can be used to direct foldamers toward increasingly complex folds.
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Affiliation(s)
- Zacharias J Kinney
- Department of Chemistry & Biochemistry , Miami University , Oxford , OH 45056 , USA .
| | - Viraj C Kirinda
- Department of Chemistry & Biochemistry , Miami University , Oxford , OH 45056 , USA .
| | - C Scott Hartley
- Department of Chemistry & Biochemistry , Miami University , Oxford , OH 45056 , USA .
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8
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Lotter D, Castrogiovanni A, Neuburger M, Sparr C. Catalyst-Controlled Stereodivergent Synthesis of Atropisomeric Multiaxis Systems. ACS CENTRAL SCIENCE 2018; 4:656-660. [PMID: 29806013 PMCID: PMC5968508 DOI: 10.1021/acscentsci.8b00204] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Indexed: 06/08/2023]
Abstract
Molecular scaffolds with multiple rotationally restricted bonds allow a precise spatial positioning of functional groups. However, their synthesis requires methods addressing the configuration of each stereogenic axis. We report here a catalyst-stereocontrolled synthesis of atropisomeric multiaxis systems enabling divergence from the prevailing stereochemical reaction path. By using ion-pairing catalysts in arene-forming aldol condensations, a strong substrate-induced stereopreference can be overcome to provide structurally well-defined helical oligo-1,2-naphthylenes. The configuration of up to four stereogenic axes was individually catalyst-controlled, affording quinquenaphthalenes with a unique topology.
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Affiliation(s)
- Dominik Lotter
- Department of Chemistry, University
of Basel, St. Johanns-Ring
19, 4056 Basel, Switzerland
| | | | - Markus Neuburger
- Department of Chemistry, University
of Basel, St. Johanns-Ring
19, 4056 Basel, Switzerland
| | - Christof Sparr
- Department of Chemistry, University
of Basel, St. Johanns-Ring
19, 4056 Basel, Switzerland
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9
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Muraoka A, Fukabori N. Electronically excited states of carbazole-modified ortho-phenylenes. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2017.12.070] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Kinney ZJ, Hartley CS. Twisted Macrocycles with Folded ortho-Phenylene Subunits. J Am Chem Soc 2017; 139:4821-4827. [DOI: 10.1021/jacs.7b00149] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Zacharias J. Kinney
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
| | - C. Scott Hartley
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
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11
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Vemuri GN, Chu M, Dong H, Spinello BJ, Hartley CS. Solvent effects on the folding of o-phenylene oligomers. Org Biomol Chem 2017; 15:845-851. [DOI: 10.1039/c6ob02512a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
o-Phenylenes fold well in a wide range of solvents, but worse in higher-dielectric media because misfolded states are more polar.
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Affiliation(s)
| | - Meng Chu
- Department of Chemistry & Biochemistry
- Miami University
- Oxford
- USA
| | - Han Dong
- Department of Chemistry & Biochemistry
- Miami University
- Oxford
- USA
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12
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Lehnherr D, Chen C, Pedramrazi Z, DeBlase CR, Alzola JM, Keresztes I, Lobkovsky EB, Crommie MF, Dichtel WR. Sequence-defined oligo( ortho-arylene) foldamers derived from the benzannulation of ortho(arylene ethynylene)s. Chem Sci 2016; 7:6357-6364. [PMID: 28567248 PMCID: PMC5450445 DOI: 10.1039/c6sc02520j] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 07/06/2016] [Indexed: 01/10/2023] Open
Abstract
A Cu-catalyzed benzannulation reaction transforms ortho(arylene ethynylene) oligomers into ortho-arylenes.
A Cu-catalyzed benzannulation reaction transforms ortho(arylene ethynylene) oligomers into ortho-arylenes. This approach circumvents iterative Suzuki cross-coupling reactions previously used to assemble hindered ortho-arylene backbones. These derivatives form helical folded structures in the solid-state and in solution, as demonstrated by X-ray crystallography and solution-state NMR analysis. DFT calculations of misfolded conformations are correlated with variable-temperature 1H and EXSY NMR to reveal that folding is cooperative and more favorable in halide-substituted naphthalenes. Helical ortho-arylene foldamers with specific aromatic sequences organize functional π-electron systems into arrangements ideal for ambipolar charge transport and show preliminary promise for the surface-mediated synthesis of structurally defined graphene nanoribbons.
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Affiliation(s)
- Dan Lehnherr
- Department of Chemistry and Chemical Biology , Baker Laboratory , Cornell University , Ithaca , New York 14853-1301 , USA .
| | - Chen Chen
- Department of Physics , University of California at Berkeley , Berkeley , California 94720 , USA .
| | - Zahra Pedramrazi
- Department of Physics , University of California at Berkeley , Berkeley , California 94720 , USA .
| | - Catherine R DeBlase
- Department of Chemistry and Chemical Biology , Baker Laboratory , Cornell University , Ithaca , New York 14853-1301 , USA .
| | - Joaquin M Alzola
- Department of Chemistry and Chemical Biology , Baker Laboratory , Cornell University , Ithaca , New York 14853-1301 , USA .
| | - Ivan Keresztes
- Nuclear Magnetic Resonance Laboratory , Cornell University , Ithaca , New York 14853-1301 , USA
| | - Emil B Lobkovsky
- X-ray Crystallography Laboratory , Cornell University , Ithaca , New York 14853-1301 , USA
| | - Michael F Crommie
- Department of Physics , University of California at Berkeley , Berkeley , California 94720 , USA .
| | - William R Dichtel
- Department of Chemistry and Chemical Biology , Baker Laboratory , Cornell University , Ithaca , New York 14853-1301 , USA . .,Department of Chemistry , Northwestern University , Evanston , Illinois 60208 , USA
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13
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Abstract
In nature, the folding of oligomers and polymers is used to generate complex three-dimensional structures, yielding macromolecules with diverse functions in catalysis, recognition, transport, and charge- and energy-transfer. Over the past 20-30 years, chemists have sought to replicate this strategy by developing new foldamers: oligomers that fold into well-defined secondary structures in solution. A wide array of abiotic foldamers have been developed, ranging from non-natural peptides to aromatics. The ortho-phenylenes represent a recent addition to the family of aromatic foldamers. Despite their structural simplicity (chains of benzenes connected at the ortho positions), it was not until 2010 that systematic studies of o-phenylenes showed that they reliably fold into helices in solution (and in the solid state). This conformational behavior is of fundamental interest: o-Arylene and o-heteroarylene structures are found embedded within many other systems, part of an emerging interest in sterically congested polyphenylenes. Further, o-phenylenes are increasingly straightforward to synthesize because of continuing developments in arene-arene coupling, the Asao-Yamamoto benzannulation, and benzyne polymerization. In this Account, we discuss the folding of o-phenylenes with emphasis on features that make them unique among aromatic foldamers. Interconversion between their different backbone conformers is slow on the NMR time scale around room temperature. The (1)H NMR spectra of oligomers can therefore be deconvoluted to give sets of chemical shifts for different folding states. The chemical shifts are both highly sensitive to conformation and readily predicted using ab initio methods, affording critical information about the conformational distribution. The picture that emerges is that o-phenylenes fold into helices with offset stacking between every third repeat unit. In general, misfolding occurs primarily at the oligomer termini (i.e., "frayed ends"). Because of their structural simplicity, the folding can be described by straightforward models. The overall population can be divided into two enantiomeric pools, with racemization and misfolding as two distinct processes. Examination of substituent effects on folding reveals that the determinant of the relative stability of different conformers is (offset) aromatic stacking interactions parallel to the helical axis. That is, the folding of o-phenylenes is analogous to that of α-helices, with aromatic stacking in place of hydrogen bonding. The folding propensity can be tuned using well-known substituent effects on aromatic stacking, with moderate electron-withdrawing substituents giving nearly perfect folding. The combination of a simple folding mechanism and readily characterized conformational populations makes o-phenylenes attractive structural motifs for incorporation into more-complex architectures, an important part of the next phase of foldamer research.
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Affiliation(s)
- C. Scott Hartley
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
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14
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Repasky PJ, Agra-Kooijman DM, Kumar S, Hartley CS. Smectic-A and Hexatic-B Liquid Crystal Phases of Sanidic Alkyl-Substituted Dibenzo[fg,op]naphthacenes. J Phys Chem B 2016; 120:2829-37. [DOI: 10.1021/acs.jpcb.5b10990] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Paul J. Repasky
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
| | | | - Satyendra Kumar
- Department
of Physics, Kent State University, Kent, Ohio 44242, United States
| | - C. Scott Hartley
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
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15
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Marqués-González S, Fujii S, Nishino T, Shoji Y, Ishiwari F, Fukushima T, Kiguchi M. Scanning tunnelling microscopy analysis of octameric o-phenylenes on Au(111). RSC Adv 2016. [DOI: 10.1039/c6ra07173b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
STM microscopy allowed direct observation of perfectly- and partially-folded conformers of OP8Br and OP8NO2on Au(111). The metastable partially-folded conformation was stabilized by their more efficient electronic coupling with the Au substrate.
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Affiliation(s)
- Santiago Marqués-González
- Department of Chemistry
- Graduate School of Science and Engineering
- Tokyo Institute of Technology
- Tokyo 152-8551
- Japan
| | - Shintaro Fujii
- Department of Chemistry
- Graduate School of Science and Engineering
- Tokyo Institute of Technology
- Tokyo 152-8551
- Japan
| | - Tomoaki Nishino
- Department of Chemistry
- Graduate School of Science and Engineering
- Tokyo Institute of Technology
- Tokyo 152-8551
- Japan
| | - Yoshiaki Shoji
- Chemical Resources Laboratory
- Tokyo Institute of Technology
- Yokohama 226-8503
- Japan
| | - Fumitaka Ishiwari
- Chemical Resources Laboratory
- Tokyo Institute of Technology
- Yokohama 226-8503
- Japan
| | - Takanori Fukushima
- Chemical Resources Laboratory
- Tokyo Institute of Technology
- Yokohama 226-8503
- Japan
| | - Manabu Kiguchi
- Department of Chemistry
- Graduate School of Science and Engineering
- Tokyo Institute of Technology
- Tokyo 152-8551
- Japan
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16
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Tokoro Y, Ohtsuka N, Toh A, Fukuzawa SI. Synthesis and Structure of N-Hetero-ortho-phenylene Hexamers Containing 2,3-Substituted Pyridine Moieties. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501270] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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17
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Nelli YR, Antunes S, Salaün A, Thinon E, Massip S, Kauffmann B, Douat C, Guichard G. Isosteric Substitutions of Urea to Thiourea and Selenourea in Aliphatic Oligourea Foldamers: Site-Specific Perturbation of the Helix Geometry. Chemistry 2014; 21:2870-80. [DOI: 10.1002/chem.201405792] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Indexed: 01/05/2023]
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18
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Mathew S, Crandall LA, Ziegler CJ, Hartley CS. Enhanced Helical Folding of ortho-Phenylenes through the Control of Aromatic Stacking Interactions. J Am Chem Soc 2014; 136:16666-75. [DOI: 10.1021/ja509902m] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Sanyo Mathew
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
| | - Laura A. Crandall
- Department
of Chemistry, University of Akron, Akron, Ohio 44325, United States
| | | | - C. Scott Hartley
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
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19
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Arslan H, Walker KL, Dichtel WR. Regioselective Asao–Yamamoto Benzannulations of Diaryl Acetylenes. Org Lett 2014; 16:5926-9. [DOI: 10.1021/ol502938y] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Hasan Arslan
- Department of
Chemistry and Chemical Biology, Cornell University, Baker Laboratory, Ithaca, New York 14853-1301, United States
| | - Katherine L. Walker
- Department of
Chemistry and Chemical Biology, Cornell University, Baker Laboratory, Ithaca, New York 14853-1301, United States
| | - William R. Dichtel
- Department of
Chemistry and Chemical Biology, Cornell University, Baker Laboratory, Ithaca, New York 14853-1301, United States
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20
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Nakashima T, Imamura K, Yamamoto K, Kimura Y, Katao S, Hashimoto Y, Kawai T. Synthesis, Structure, and Properties of α,β‐Linked Oligothiazoles with Controlled Sequence. Chemistry 2014; 20:13722-9. [PMID: 25201229 DOI: 10.1002/chem.201403791] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Indexed: 11/08/2022]
Affiliation(s)
- Takuya Nakashima
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916‐5 Takayama, Ikoma, Nara 630‐0192 (Japan)
| | - Kazuhiko Imamura
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916‐5 Takayama, Ikoma, Nara 630‐0192 (Japan)
| | - Kyohei Yamamoto
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916‐5 Takayama, Ikoma, Nara 630‐0192 (Japan)
| | - Yuka Kimura
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916‐5 Takayama, Ikoma, Nara 630‐0192 (Japan)
| | - Shohei Katao
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916‐5 Takayama, Ikoma, Nara 630‐0192 (Japan)
| | - Yuichiro Hashimoto
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916‐5 Takayama, Ikoma, Nara 630‐0192 (Japan)
| | - Tsuyoshi Kawai
- Graduate School of Materials Science, Nara Institute of Science and Technology, 8916‐5 Takayama, Ikoma, Nara 630‐0192 (Japan)
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21
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Kuttner JR, Hilt G. Regiodivergent Cobalt-Catalyzed Diels–Alder Reactions for the Synthesis of Bifunctional Building Blocks and Their Suzuki-Cross-Coupling Polymerizations. Macromolecules 2014. [DOI: 10.1021/ma5012446] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Julian R. Kuttner
- Fachbereich
Chemie, Philipps-Universität Marburg, Hans-Meerwein-Str., 35043 Marburg, Germany
| | - Gerhard Hilt
- Fachbereich
Chemie, Philipps-Universität Marburg, Hans-Meerwein-Str., 35043 Marburg, Germany
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22
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Ito S, Takahashi K, Nozaki K. Formal Aryne Polymerization: Use of [2.2.1]Oxabicyclic Alkenes as Aryne Equivalents. J Am Chem Soc 2014; 136:7547-50. [DOI: 10.1021/ja502073k] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Shingo Ito
- Department of Chemistry and
Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Keisuke Takahashi
- Department of Chemistry and
Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kyoko Nozaki
- Department of Chemistry and
Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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23
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Kajitani T, Suna Y, Kosaka A, Osawa T, Fujikawa S, Takata M, Fukushima T, Aida T. o-Phenylene Octamers as Surface Modifiers for Homeotropic Columnar Ordering of Discotic Liquid Crystals. J Am Chem Soc 2013; 135:14564-7. [DOI: 10.1021/ja4087853] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Takashi Kajitani
- RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Chemical
Resources Laboratory, Tokyo Institute of Technology, R1-1 4259
Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Yuki Suna
- RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Atsuko Kosaka
- RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Chemical
Resources Laboratory, Tokyo Institute of Technology, R1-1 4259
Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Terutsune Osawa
- RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department
of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Shigenori Fujikawa
- RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Masaki Takata
- RIKEN SPring-8 Center, 1-1-1
Kouto, Sayo, Hyogo 679-5198, Japan
| | - Takanori Fukushima
- RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Chemical
Resources Laboratory, Tokyo Institute of Technology, R1-1 4259
Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
| | - Takuzo Aida
- RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Department
of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- RIKEN Center for Emergent Matter Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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24
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25
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Koyanagi M, Eichenauer N, Ihara H, Yamamoto T, Suginome M. Anthranilamide-masked o-Iodoarylboronic Acids as Coupling Modules for Iterative Synthesis of ortho-Linked Oligoarenes. CHEM LETT 2013. [DOI: 10.1246/cl.130136] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Masashi Koyanagi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University
| | - Nils Eichenauer
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University
| | - Hideki Ihara
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University
| | - Takeshi Yamamoto
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University
| | - Michinori Suginome
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University
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26
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Mathew SM, Engle JT, Ziegler CJ, Hartley CS. The Role of Arene–Arene Interactions in the Folding of ortho-Phenylenes. J Am Chem Soc 2013; 135:6714-22. [DOI: 10.1021/ja4026006] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sanyo M. Mathew
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
| | - James T. Engle
- Department of Chemistry, University of Akron, Akron, Ohio 44325, United States
| | | | - C. Scott Hartley
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
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27
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Manabe K, Kimura T. Repetitive synthetic method for o,o,p-oligophenylenes using C-H arylation. Org Lett 2013; 15:374-7. [PMID: 23289430 DOI: 10.1021/ol303327k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A synthetic method for the preparation of o,o,p-oligophenylenes has been developed. It involves Miura's C-H arylation of 2-biphenols with aryl nonaflates as the key step. Oligophenylenes with defined lengths are successfully synthesized using this method.
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Affiliation(s)
- Kei Manabe
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Shizuoka 422-8526, Japan.
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28
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Arslan H, Saathoff JD, Bunck DN, Clancy P, Dichtel WR. Highly Efficient Benzannulation of Poly(phenylene ethynylene)s. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201206964] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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29
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Arslan H, Saathoff JD, Bunck DN, Clancy P, Dichtel WR. Highly Efficient Benzannulation of Poly(phenylene ethynylene)s. Angew Chem Int Ed Engl 2012; 51:12051-4. [DOI: 10.1002/anie.201206964] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Indexed: 11/08/2022]
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30
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Ando S, Ohta E, Kosaka A, Hashizume D, Koshino H, Fukushima T, Aida T. Remarkable Effects of Terminal Groups and Solvents on Helical Folding of o-Phenylene Oligomers. J Am Chem Soc 2012; 134:11084-7. [DOI: 10.1021/ja303117z] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Shinji Ando
- RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198,
Japan
| | - Eisuke Ohta
- RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198,
Japan
| | - Atsuko Kosaka
- RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198,
Japan
| | - Daisuke Hashizume
- RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198,
Japan
| | - Hiroyuki Koshino
- RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198,
Japan
| | - Takanori Fukushima
- RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198,
Japan
- Chemical Resources
Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku,
Yokohama 226-8503, Japan
| | - Takuzo Aida
- RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198,
Japan
- School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo
113-8656, Japan
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31
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He J, Mathew SM, Cornett SD, Grundy SC, Hartley CS. ortho-Phenylene oligomers with terminal push–pull substitution. Org Biomol Chem 2012; 10:3398-405. [DOI: 10.1039/c2ob07146k] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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32
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33
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Affiliation(s)
- C. Scott Hartley
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
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34
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Mathew SM, Hartley CS. Parent o-Phenylene Oligomers: Synthesis, Conformational Behavior, and Characterization. Macromolecules 2011. [DOI: 10.1021/ma201866p] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Sanyo M. Mathew
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
| | - C. Scott Hartley
- Department of Chemistry & Biochemistry, Miami University, Oxford, Ohio 45056, United States
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