The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Atsuhiro Osuka - One of the best experts on this subject based on the ideXlab platform.
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meso β oligohaloporphyrins as useful synthetic intermediates of diphenylamine fused porphyrin and meso to meso β to β doubly butadiyne bridged Diporphyrin
Angewandte Chemie, 2015Co-Authors: Norihito Fukui, Hideki Yorimitsu, Atsuhiro OsukaAbstract:The chlorination of β-halo or β,β-dihaloporphyrins with 2-chloro-1,3-bis(methoxycarbonyl)guanidine (Palau′Chlor) proceeded selectively at the neighboring unsubstituted meso position to afford meso,β-dihalo or meso,β,β-trihaloporphyrins. Such oligohaloporphyrins are useful platforms for constructing more-elaborate porphyrin-based extended π systems. For example, meso-chloro-β,β-diiodoporphyrin participated in an efficient single-step synthesis of a diphenylamine-fused porphyrin. In addition, meso-chloro-β-iodoporphyrin was transformed in stepwise fashion into an efficiently conjugated meso-to-meso,β-to-β doubly butadiyne-linked porphyrin dimer, a system which was previously difficult to access without such haloporphyrin precursors.
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Direct meso-Alkynylation of Porphyrins Doubly Assisted by Pyridyl Coordination
2012Co-Authors: Shoma Anabuki, Naoki Aratani, Sumito Tokuji, Atsuhiro OsukaAbstract:Direct meso-alkynylation of β,β′-dipyridylporphyrin with various alkynyllithium reagents has been achieved, in which the β,β′-dipyridyl groups play an important role in facilitating the nucleophilic addition of the reagents through double coordination. This method enabled the synthesis of a meso-ethynylene-bridged Diporphyrin
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meso meso bis 5 azaindol 2 yl appended meso meso linked zn ii Diporphyrin a discrete fluorescent assembly
Organic Letters, 2009Co-Authors: Chihiro Maeda, Hiroshi Shinokubo, Atsuhiro OsukaAbstract:Cu(II)-catalyzed intramolecular cyclization of meso-(4-aminopyrid-3-yl)ethynyl Zn(II) porphyrin provided meso-(5-azaindol-2-yl)-substituted Zn(II) porphyrin. meso,meso'-Bis(5-azaindol-2-yl)-substituted Diporphyrin 7 was similarly prepared and was found to form a fluorescent trimeric prismatic assembly consisting of single atropisomer 7(in-in).
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simultaneous enrichments of optical purity and n m abundance of swnts through extraction with 3 6 carbazolylene bridged chiral Diporphyrin nanotweezers
ACS Nano, 2008Co-Authors: Naoki Komatsu, Xiaobin Peng, Takahide Kimura, Atsuhiro OsukaAbstract:Since structural control of single-walled carbon nanotubes (SWNTs) leads to control of their physical properties, isolation and synthesis of specific (n,m) structures of SWNTs have been extensively...
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bay area selective thermal 4 2 and 4 4 cycloaddition reactions of triply linked znii Diporphyrin with o xylylene
Chemistry: A European Journal, 2008Co-Authors: Takayuki Tanaka, Yasuyuki Nakamura, Atsuhiro OsukaAbstract:A triply linked ZnII Diporphyrin underwent site-selective cycloaddition reactions with thermally generated o-xylylene to provide a triply linked porphyrin-chlorin hybrid and a triply linked chlorin dimer in moderate yields. The former product is a symmetry-allowed [4+2] cycloadduct, while the latter is a symmetry-forbidden [4+4] cycloadduct. Oxidation of the latter product with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) provided a triply linked Diporphyrin fused with a benzocyclooctatriene segment. This oxidized product and above [4+2] cycloadduct were structurally characterized by single crystal X-ray diffraction analysis. The observed site-selectivity is considered to arise from the large MO coefficients at the bay-area in the LUMO of the triply linked Diporphyrin. The anomalous thermal [4+4] cycloaddition may be ascribed to the highly conjugated and quite perturbed electronic properties of triply linked ZnII Diporphyrin.
Naoki Komatsu - One of the best experts on this subject based on the ideXlab platform.
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Simultaneous Discrimination of Diameter, Handedness, and Metallicity of Single-Walled Carbon Nanotubes with Chiral Diporphyrin Nanocalipers
2016Co-Authors: Gang Liu, Takahide Kimura, Feng Wang, Yukie Saito, Ajoy K. Bauri, Songpol Chaunchaiyakul, Yuji Kuwahara, Naoki KomatsuAbstract:We have been developing the methodology to discriminate the handedness and diameter of single-walled carbon nanotubes (SWNTs) through molecular recognition using chiral Diporphyrin nanotweezers. Although relatively small diameters of SWNTs (1.0 nm. In this context, we designed chiral Diporphyrin with a much larger cavity, namely, “nanocalipers”. The feature of the newly designed host molecule is: (1) long spacer with more than 1.4 nm consisting of three aromatic moieties; (2) nearly parallel orientation of the two porphyrins; (3) restricted conformation by biaryl linkages of the porphyrin–carbazole and carbazole–anthracene; (4) strong interaction of two porphyrins and anthracene with the surface of a SWNT through π–π stacking; and (5) stereogenic centers at the periphery of porphyrins discriminating helicity of SWNTs. As expected, we obtained optically active SWNTs with >1.0 nm in diameter and, unexpectedly, enriched metallic SWNTs over semiconducting ones. The optically active metallic SWNTs are identified for the first time, in addition to the optically active semiconducting SWNTs with such large diameters. The nanocalipers are found to recognize the diameter, handedness, and metallicity of SWNTs simultaneously
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Structural discrimination of double-walled carbon nanotubes by chiral Diporphyrin nanocalipers
Journal of Materials Chemistry A, 2014Co-Authors: Gang Liu, Takahide Kimura, Yukie Saito, Daisuke Nishio-hamane, Ajoy K. Bauri, Emmanuel Flahaut, Naoki KomatsuAbstract:In this contribution, we demonstrate the separation of double-walled carbon nanotubes (DWNTs) by host–guest methodology. New chiral Diporphyrin nanocalipers with a longer spacer ([similar]1.9 nm) consisting of carbazole–pyrene–carbazole are rationally designed as a host on the basis of the previous chiral Diporphyrin nanocalipers with carbazole–anthracene–carbazole spacer ([similar]1.4 nm). The chiral nanocalipers are found to recognize the diameter of DWNTs to make diameter distribution much narrower. In addition, the extracted carbon nanotubes (CNTs) exhibited circular dichroism (CD) after removal of the chiral nanocalipers and dissolution in water in the presence of achiral surfactant.
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simultaneous discrimination of diameter handedness and metallicity of single walled carbon nanotubes with chiral Diporphyrin nanocalipers
Journal of the American Chemical Society, 2013Co-Authors: Gang Liu, Takahide Kimura, Feng Wang, Yukie Saito, Ajoy Kumar Bauri, Songpol Chaunchaiyakul, Yuji Kuwahara, Naoki KomatsuAbstract:We have been developing the methodology to discriminate the handedness and diameter of single-walled carbon nanotubes (SWNTs) through molecular recognition using chiral Diporphyrin nanotweezers. Although relatively small diameters of SWNTs ( 1.0 nm. In this context, we designed chiral Diporphyrin with a much larger cavity, namely, "nanocalipers". The feature of the newly designed host molecule is: (1) long spacer with more than 1.4 nm consisting of three aromatic moieties; (2) nearly parallel orientation of the two porphyrins; (3) restricted conformation by biaryl linkages of the porphyrin-carbazole and carbazole-anthracene; (4) strong interaction of two porphyrins and anthracene with the surface of a SWNT through π-π stacking; and (5) stereogenic centers at the periphery of porphyrins discriminating helicity of SWNTs. As expected, we obtained optically active SWNTs with >1.0 nm in diameter and, unexpectedly, enriched metallic SWNTs over semiconducting ones. The optically active metallic SWNTs are identified for the first time, in addition to the optically active semiconducting SWNTs with such large diameters. The nanocalipers are found to recognize the diameter, handedness, and metallicity of SWNTs simultaneously.
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preferential extraction of left or right handed single walled carbon nanotubes by use of chiral Diporphyrin nanotweezers
Organic and Biomolecular Chemistry, 2012Co-Authors: Gang Liu, Xiaobin Peng, Shuji Aonuma, Takahide Kimura, Feng Wang, Tatsuki Yasumitsu, Li Zhao, Ajoy Kumar Bauri, Naoki KomatsuAbstract:Handedness- and diameter-based separation of single-walled carbon nanotubes was achieved through preferential extraction of 76-CoMoCAT with 2,6-pyridylene-bridged chiral Diporphyrin nanotweezers.
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improved selectivity in discriminating handedness and diameter of single walled carbon nanotubes with n substituted 3 6 carbazolylene bridged chiral Diporphyrin nanotweezers
Nanoscale, 2011Co-Authors: Feng Wang, Takahide Kimura, Kazunari Matsuda, A Mustafizur F M Rahman, Naoki KomatsuAbstract:Chiral Diporphyrin nanotweezers 1 consisting of two chiral porphyrins with N-substituted 3,6-carbazolylene in between have been studied for the separation of single-walled carbon nanotubes (SWNTs). As compared to the analogous nanotweezers 2 without an N-substitutent, nanotweezers 1 with the N-octylcarbazolylene spacer exhibit much higher extraction ability and better selectivity for SWNTs. A narrower diameter range of SWNTs, from 0.88 to 0.92 nm, was selectively extracted with nanotweezers 1. In addition, only (7,6)-SWNTs of 0.90 nm diameter were optically enriched through extraction with 1, while SWNTs extracted with 2 showed lower optical purity of (7,6)-SWNTs. These enhanced extraction and discrimination abilities of 1 can be attributed to the formation of a more stable SWNT complex of 1 than of 2 in methanol.
Xiaobin Peng - One of the best experts on this subject based on the ideXlab platform.
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preferential extraction of left or right handed single walled carbon nanotubes by use of chiral Diporphyrin nanotweezers
Organic and Biomolecular Chemistry, 2012Co-Authors: Gang Liu, Xiaobin Peng, Shuji Aonuma, Takahide Kimura, Feng Wang, Tatsuki Yasumitsu, Li Zhao, Ajoy Kumar Bauri, Naoki KomatsuAbstract:Handedness- and diameter-based separation of single-walled carbon nanotubes was achieved through preferential extraction of 76-CoMoCAT with 2,6-pyridylene-bridged chiral Diporphyrin nanotweezers.
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optical resolution of single walled carbon nanotubes through molecular recognition with chiral Diporphyrin nanotweezers
ChemInform, 2011Co-Authors: Xiaobin Peng, Feng Wang, A Mustafizur F M Rahman, Ajoy Kumar Bauri, Naoki KomatsuAbstract:Single-walled carbon nanotubes (SWNTs) have either chiral or achiral form, and synthesized chiral SWNTs include both left- and right-handed structures in equal amounts. Recently, a racemic mixture ...
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simultaneous discrimination of handedness and diameter of single walled carbon nanotubes swnts with chiral Diporphyrin nanotweezers leading to enrichment of a single enantiomer of 6 5 swnts
Journal of the American Chemical Society, 2010Co-Authors: Feng Wang, Xiaobin Peng, Takahide Kimura, Kazunari Matsuda, A Mustafizur F M Rahman, Naoki KomatsuAbstract:Separation of single-walled carbon nanotubes (SWNTs) according to their handedness has been attracting growing interest. Our methodology to separate the enantiomers of SWNTs is based on molecular recognition with chiral Diporphyrin nanotweezers. Herein, we report novel nanotweezers 1 consisting of two chiral porphyrins and phenanthrene in between. These nanotweezers 1 are rationally designed to discriminate diameter and handedness simultaneously by taking into account the relationship between the (n, m) selectivity and the structures of previously reported chiral nanotweezers. Owing to the relatively narrow cleft made by two porphyrins, the nanotweezers 1 showed high selectivity toward (6,5)-SWNTs possessing the smallest diameter among the major components of CoMoCAT-SWNTs. In addition, the chiral Diporphyrin 1 discriminated the left- and right-handed structures of (6,5)-SWNTs, providing high enantiomeric excess (67% ee on the basis of the (6,5)-SWNTs with high optical purity recently reported by Weisman). In conclusion, only the single stereoisomer of (6,5)-SWNTs was highly enriched through the extraction of CoMoCAT-SWNTs with phenanthrene-bridged chiral Diporphyrin nanotweezers 1.
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simultaneous discrimination of handedness and diameter of single walled carbon nanotubes swnts with chiral Diporphyrin nanotweezers leading to enrichment of a single enantiomer of 6 5 swnts
Journal of the American Chemical Society, 2010Co-Authors: Feng Wang, Xiaobin Peng, Takahide Kimura, Kazunari Matsuda, A Mustafizur F M Rahman, Naoki KomatsuAbstract:Separation of single-walled carbon nanotubes (SWNTs) according to their handedness has been attracting growing interest. Our methodology to separate the enantiomers of SWNTs is based on molecular recognition with chiral Diporphyrin nanotweezers. Herein, we report novel nanotweezers 1 consisting of two chiral porphyrins and phenanthrene in between. These nanotweezers 1 are rationally designed to discriminate diameter and handedness simultaneously by taking into account the relationship between the (n, m) selectivity and the structures of previously reported chiral nanotweezers. Owing to the relatively narrow cleft made by two porphyrins, the nanotweezers 1 showed high selectivity toward (6,5)-SWNTs possessing the smallest diameter among the major components of CoMoCAT−SWNTs. In addition, the chiral Diporphyrin 1 discriminated the left- and right-handed structures of (6,5)-SWNTs, providing high enantiomeric excess (67% ee on the basis of the (6,5)-SWNTs with high optical purity recently reported by Weisman)...
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simultaneous enrichments of optical purity and n m abundance of swnts through extraction with 3 6 carbazolylene bridged chiral Diporphyrin nanotweezers
ACS Nano, 2008Co-Authors: Naoki Komatsu, Xiaobin Peng, Takahide Kimura, Atsuhiro OsukaAbstract:Since structural control of single-walled carbon nanotubes (SWNTs) leads to control of their physical properties, isolation and synthesis of specific (n,m) structures of SWNTs have been extensively...
Takahide Kimura - One of the best experts on this subject based on the ideXlab platform.
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Simultaneous Discrimination of Diameter, Handedness, and Metallicity of Single-Walled Carbon Nanotubes with Chiral Diporphyrin Nanocalipers
2016Co-Authors: Gang Liu, Takahide Kimura, Feng Wang, Yukie Saito, Ajoy K. Bauri, Songpol Chaunchaiyakul, Yuji Kuwahara, Naoki KomatsuAbstract:We have been developing the methodology to discriminate the handedness and diameter of single-walled carbon nanotubes (SWNTs) through molecular recognition using chiral Diporphyrin nanotweezers. Although relatively small diameters of SWNTs (1.0 nm. In this context, we designed chiral Diporphyrin with a much larger cavity, namely, “nanocalipers”. The feature of the newly designed host molecule is: (1) long spacer with more than 1.4 nm consisting of three aromatic moieties; (2) nearly parallel orientation of the two porphyrins; (3) restricted conformation by biaryl linkages of the porphyrin–carbazole and carbazole–anthracene; (4) strong interaction of two porphyrins and anthracene with the surface of a SWNT through π–π stacking; and (5) stereogenic centers at the periphery of porphyrins discriminating helicity of SWNTs. As expected, we obtained optically active SWNTs with >1.0 nm in diameter and, unexpectedly, enriched metallic SWNTs over semiconducting ones. The optically active metallic SWNTs are identified for the first time, in addition to the optically active semiconducting SWNTs with such large diameters. The nanocalipers are found to recognize the diameter, handedness, and metallicity of SWNTs simultaneously
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Structural discrimination of double-walled carbon nanotubes by chiral Diporphyrin nanocalipers
Journal of Materials Chemistry A, 2014Co-Authors: Gang Liu, Takahide Kimura, Yukie Saito, Daisuke Nishio-hamane, Ajoy K. Bauri, Emmanuel Flahaut, Naoki KomatsuAbstract:In this contribution, we demonstrate the separation of double-walled carbon nanotubes (DWNTs) by host–guest methodology. New chiral Diporphyrin nanocalipers with a longer spacer ([similar]1.9 nm) consisting of carbazole–pyrene–carbazole are rationally designed as a host on the basis of the previous chiral Diporphyrin nanocalipers with carbazole–anthracene–carbazole spacer ([similar]1.4 nm). The chiral nanocalipers are found to recognize the diameter of DWNTs to make diameter distribution much narrower. In addition, the extracted carbon nanotubes (CNTs) exhibited circular dichroism (CD) after removal of the chiral nanocalipers and dissolution in water in the presence of achiral surfactant.
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simultaneous discrimination of diameter handedness and metallicity of single walled carbon nanotubes with chiral Diporphyrin nanocalipers
Journal of the American Chemical Society, 2013Co-Authors: Gang Liu, Takahide Kimura, Feng Wang, Yukie Saito, Ajoy Kumar Bauri, Songpol Chaunchaiyakul, Yuji Kuwahara, Naoki KomatsuAbstract:We have been developing the methodology to discriminate the handedness and diameter of single-walled carbon nanotubes (SWNTs) through molecular recognition using chiral Diporphyrin nanotweezers. Although relatively small diameters of SWNTs ( 1.0 nm. In this context, we designed chiral Diporphyrin with a much larger cavity, namely, "nanocalipers". The feature of the newly designed host molecule is: (1) long spacer with more than 1.4 nm consisting of three aromatic moieties; (2) nearly parallel orientation of the two porphyrins; (3) restricted conformation by biaryl linkages of the porphyrin-carbazole and carbazole-anthracene; (4) strong interaction of two porphyrins and anthracene with the surface of a SWNT through π-π stacking; and (5) stereogenic centers at the periphery of porphyrins discriminating helicity of SWNTs. As expected, we obtained optically active SWNTs with >1.0 nm in diameter and, unexpectedly, enriched metallic SWNTs over semiconducting ones. The optically active metallic SWNTs are identified for the first time, in addition to the optically active semiconducting SWNTs with such large diameters. The nanocalipers are found to recognize the diameter, handedness, and metallicity of SWNTs simultaneously.
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preferential extraction of left or right handed single walled carbon nanotubes by use of chiral Diporphyrin nanotweezers
Organic and Biomolecular Chemistry, 2012Co-Authors: Gang Liu, Xiaobin Peng, Shuji Aonuma, Takahide Kimura, Feng Wang, Tatsuki Yasumitsu, Li Zhao, Ajoy Kumar Bauri, Naoki KomatsuAbstract:Handedness- and diameter-based separation of single-walled carbon nanotubes was achieved through preferential extraction of 76-CoMoCAT with 2,6-pyridylene-bridged chiral Diporphyrin nanotweezers.
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improved selectivity in discriminating handedness and diameter of single walled carbon nanotubes with n substituted 3 6 carbazolylene bridged chiral Diporphyrin nanotweezers
Nanoscale, 2011Co-Authors: Feng Wang, Takahide Kimura, Kazunari Matsuda, A Mustafizur F M Rahman, Naoki KomatsuAbstract:Chiral Diporphyrin nanotweezers 1 consisting of two chiral porphyrins with N-substituted 3,6-carbazolylene in between have been studied for the separation of single-walled carbon nanotubes (SWNTs). As compared to the analogous nanotweezers 2 without an N-substitutent, nanotweezers 1 with the N-octylcarbazolylene spacer exhibit much higher extraction ability and better selectivity for SWNTs. A narrower diameter range of SWNTs, from 0.88 to 0.92 nm, was selectively extracted with nanotweezers 1. In addition, only (7,6)-SWNTs of 0.90 nm diameter were optically enriched through extraction with 1, while SWNTs extracted with 2 showed lower optical purity of (7,6)-SWNTs. These enhanced extraction and discrimination abilities of 1 can be attributed to the formation of a more stable SWNT complex of 1 than of 2 in methanol.
Feng Wang - One of the best experts on this subject based on the ideXlab platform.
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Simultaneous Discrimination of Diameter, Handedness, and Metallicity of Single-Walled Carbon Nanotubes with Chiral Diporphyrin Nanocalipers
2016Co-Authors: Gang Liu, Takahide Kimura, Feng Wang, Yukie Saito, Ajoy K. Bauri, Songpol Chaunchaiyakul, Yuji Kuwahara, Naoki KomatsuAbstract:We have been developing the methodology to discriminate the handedness and diameter of single-walled carbon nanotubes (SWNTs) through molecular recognition using chiral Diporphyrin nanotweezers. Although relatively small diameters of SWNTs (1.0 nm. In this context, we designed chiral Diporphyrin with a much larger cavity, namely, “nanocalipers”. The feature of the newly designed host molecule is: (1) long spacer with more than 1.4 nm consisting of three aromatic moieties; (2) nearly parallel orientation of the two porphyrins; (3) restricted conformation by biaryl linkages of the porphyrin–carbazole and carbazole–anthracene; (4) strong interaction of two porphyrins and anthracene with the surface of a SWNT through π–π stacking; and (5) stereogenic centers at the periphery of porphyrins discriminating helicity of SWNTs. As expected, we obtained optically active SWNTs with >1.0 nm in diameter and, unexpectedly, enriched metallic SWNTs over semiconducting ones. The optically active metallic SWNTs are identified for the first time, in addition to the optically active semiconducting SWNTs with such large diameters. The nanocalipers are found to recognize the diameter, handedness, and metallicity of SWNTs simultaneously
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simultaneous discrimination of diameter handedness and metallicity of single walled carbon nanotubes with chiral Diporphyrin nanocalipers
Journal of the American Chemical Society, 2013Co-Authors: Gang Liu, Takahide Kimura, Feng Wang, Yukie Saito, Ajoy Kumar Bauri, Songpol Chaunchaiyakul, Yuji Kuwahara, Naoki KomatsuAbstract:We have been developing the methodology to discriminate the handedness and diameter of single-walled carbon nanotubes (SWNTs) through molecular recognition using chiral Diporphyrin nanotweezers. Although relatively small diameters of SWNTs ( 1.0 nm. In this context, we designed chiral Diporphyrin with a much larger cavity, namely, "nanocalipers". The feature of the newly designed host molecule is: (1) long spacer with more than 1.4 nm consisting of three aromatic moieties; (2) nearly parallel orientation of the two porphyrins; (3) restricted conformation by biaryl linkages of the porphyrin-carbazole and carbazole-anthracene; (4) strong interaction of two porphyrins and anthracene with the surface of a SWNT through π-π stacking; and (5) stereogenic centers at the periphery of porphyrins discriminating helicity of SWNTs. As expected, we obtained optically active SWNTs with >1.0 nm in diameter and, unexpectedly, enriched metallic SWNTs over semiconducting ones. The optically active metallic SWNTs are identified for the first time, in addition to the optically active semiconducting SWNTs with such large diameters. The nanocalipers are found to recognize the diameter, handedness, and metallicity of SWNTs simultaneously.
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preferential extraction of left or right handed single walled carbon nanotubes by use of chiral Diporphyrin nanotweezers
Organic and Biomolecular Chemistry, 2012Co-Authors: Gang Liu, Xiaobin Peng, Shuji Aonuma, Takahide Kimura, Feng Wang, Tatsuki Yasumitsu, Li Zhao, Ajoy Kumar Bauri, Naoki KomatsuAbstract:Handedness- and diameter-based separation of single-walled carbon nanotubes was achieved through preferential extraction of 76-CoMoCAT with 2,6-pyridylene-bridged chiral Diporphyrin nanotweezers.
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improved selectivity in discriminating handedness and diameter of single walled carbon nanotubes with n substituted 3 6 carbazolylene bridged chiral Diporphyrin nanotweezers
Nanoscale, 2011Co-Authors: Feng Wang, Takahide Kimura, Kazunari Matsuda, A Mustafizur F M Rahman, Naoki KomatsuAbstract:Chiral Diporphyrin nanotweezers 1 consisting of two chiral porphyrins with N-substituted 3,6-carbazolylene in between have been studied for the separation of single-walled carbon nanotubes (SWNTs). As compared to the analogous nanotweezers 2 without an N-substitutent, nanotweezers 1 with the N-octylcarbazolylene spacer exhibit much higher extraction ability and better selectivity for SWNTs. A narrower diameter range of SWNTs, from 0.88 to 0.92 nm, was selectively extracted with nanotweezers 1. In addition, only (7,6)-SWNTs of 0.90 nm diameter were optically enriched through extraction with 1, while SWNTs extracted with 2 showed lower optical purity of (7,6)-SWNTs. These enhanced extraction and discrimination abilities of 1 can be attributed to the formation of a more stable SWNT complex of 1 than of 2 in methanol.
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optical resolution of single walled carbon nanotubes through molecular recognition with chiral Diporphyrin nanotweezers
ChemInform, 2011Co-Authors: Xiaobin Peng, Feng Wang, A Mustafizur F M Rahman, Ajoy Kumar Bauri, Naoki KomatsuAbstract:Single-walled carbon nanotubes (SWNTs) have either chiral or achiral form, and synthesized chiral SWNTs include both left- and right-handed structures in equal amounts. Recently, a racemic mixture ...