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Richard H. Fish - One of the best experts on this subject based on the ideXlab platform.
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A New, Aqueous 1H NMR Shift Reagent Based on Host−Guest Molecular Recognition Principles for Organic Compound Structural Analysis: Non-covalent π−π and Hydrophobic Interactions Using a Supramolecular Host, [Cp*Rh(2‘-deoxyadenosine)]3(OTf)3
Journal of Organic Chemistry, 1998Co-Authors: Shigeyuki Nakamura, Kiyoshi Isobe, Yoshihito Watanabe, Hong Chen, Richard H. FishAbstract:We have discovered that the supramolecular host [Cp*Rh(2‘-deoxyadenosine)]3(OTf)3 (1, Cp* = η5-C5Me5, OTf = CF3SO3-) has utility as a new, aqueous 1H NMR shift reagent, via a host−guest molecular recognition process that occurs by non-covalent π−π and hydrophobic interactions, with a wide variety of H2O-soluble Organic substrates. These Organic Compound guests that we present, to illustrate the utility of host 1 as a novel, aqueous 1H NMR shift reagent, encompass examples such as aromatic carboxylic acids, phenylacetic acid (G1), 1-naphthoic acid (G2), and 2-naphthoic acid (G3), an aliphatic carboxylic acid, cyclohexylacetic acid (G4), as well as biological Compounds, a di- and a tetrapeptide containing terminal l-tryptophan (Trp) or l-phenylalanine (Phe) groups, l-Trp-l-Phe (G5) and l-Trp-l-Met-l-Asp-l-Phe amide (G6) in the pH range 5−10. A discussion of the molecular recognition parameters that effect the 1H NMR shifts of the Organic guests and a comparison with the water-soluble lanthanide shift reagen...
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a new aqueous 1h nmr shift reagent based on host guest molecular recognition principles for Organic Compound structural analysis non covalent π π and hydrophobic interactions using a supramolecular host cp rh 2 deoxyadenosine 3 otf 3
Journal of Organic Chemistry, 1998Co-Authors: Shigeyuki Nakamura, Kiyoshi Isobe, Yoshihito Watanabe, Hong Chen, Richard H. FishAbstract:We have discovered that the supramolecular host [Cp*Rh(2‘-deoxyadenosine)]3(OTf)3 (1, Cp* = η5-C5Me5, OTf = CF3SO3-) has utility as a new, aqueous 1H NMR shift reagent, via a host−guest molecular recognition process that occurs by non-covalent π−π and hydrophobic interactions, with a wide variety of H2O-soluble Organic substrates. These Organic Compound guests that we present, to illustrate the utility of host 1 as a novel, aqueous 1H NMR shift reagent, encompass examples such as aromatic carboxylic acids, phenylacetic acid (G1), 1-naphthoic acid (G2), and 2-naphthoic acid (G3), an aliphatic carboxylic acid, cyclohexylacetic acid (G4), as well as biological Compounds, a di- and a tetrapeptide containing terminal l-tryptophan (Trp) or l-phenylalanine (Phe) groups, l-Trp-l-Phe (G5) and l-Trp-l-Met-l-Asp-l-Phe amide (G6) in the pH range 5−10. A discussion of the molecular recognition parameters that effect the 1H NMR shifts of the Organic guests and a comparison with the water-soluble lanthanide shift reagen...
Shigeyuki Nakamura - One of the best experts on this subject based on the ideXlab platform.
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A New, Aqueous 1H NMR Shift Reagent Based on Host−Guest Molecular Recognition Principles for Organic Compound Structural Analysis: Non-covalent π−π and Hydrophobic Interactions Using a Supramolecular Host, [Cp*Rh(2‘-deoxyadenosine)]3(OTf)3
Journal of Organic Chemistry, 1998Co-Authors: Shigeyuki Nakamura, Kiyoshi Isobe, Yoshihito Watanabe, Hong Chen, Richard H. FishAbstract:We have discovered that the supramolecular host [Cp*Rh(2‘-deoxyadenosine)]3(OTf)3 (1, Cp* = η5-C5Me5, OTf = CF3SO3-) has utility as a new, aqueous 1H NMR shift reagent, via a host−guest molecular recognition process that occurs by non-covalent π−π and hydrophobic interactions, with a wide variety of H2O-soluble Organic substrates. These Organic Compound guests that we present, to illustrate the utility of host 1 as a novel, aqueous 1H NMR shift reagent, encompass examples such as aromatic carboxylic acids, phenylacetic acid (G1), 1-naphthoic acid (G2), and 2-naphthoic acid (G3), an aliphatic carboxylic acid, cyclohexylacetic acid (G4), as well as biological Compounds, a di- and a tetrapeptide containing terminal l-tryptophan (Trp) or l-phenylalanine (Phe) groups, l-Trp-l-Phe (G5) and l-Trp-l-Met-l-Asp-l-Phe amide (G6) in the pH range 5−10. A discussion of the molecular recognition parameters that effect the 1H NMR shifts of the Organic guests and a comparison with the water-soluble lanthanide shift reagen...
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a new aqueous 1h nmr shift reagent based on host guest molecular recognition principles for Organic Compound structural analysis non covalent π π and hydrophobic interactions using a supramolecular host cp rh 2 deoxyadenosine 3 otf 3
Journal of Organic Chemistry, 1998Co-Authors: Shigeyuki Nakamura, Kiyoshi Isobe, Yoshihito Watanabe, Hong Chen, Richard H. FishAbstract:We have discovered that the supramolecular host [Cp*Rh(2‘-deoxyadenosine)]3(OTf)3 (1, Cp* = η5-C5Me5, OTf = CF3SO3-) has utility as a new, aqueous 1H NMR shift reagent, via a host−guest molecular recognition process that occurs by non-covalent π−π and hydrophobic interactions, with a wide variety of H2O-soluble Organic substrates. These Organic Compound guests that we present, to illustrate the utility of host 1 as a novel, aqueous 1H NMR shift reagent, encompass examples such as aromatic carboxylic acids, phenylacetic acid (G1), 1-naphthoic acid (G2), and 2-naphthoic acid (G3), an aliphatic carboxylic acid, cyclohexylacetic acid (G4), as well as biological Compounds, a di- and a tetrapeptide containing terminal l-tryptophan (Trp) or l-phenylalanine (Phe) groups, l-Trp-l-Phe (G5) and l-Trp-l-Met-l-Asp-l-Phe amide (G6) in the pH range 5−10. A discussion of the molecular recognition parameters that effect the 1H NMR shifts of the Organic guests and a comparison with the water-soluble lanthanide shift reagen...
Anja Guenther - One of the best experts on this subject based on the ideXlab platform.
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The Tropical Forest and Fire Emissions Experiment: method evaluation of volatile Organic Compound emissions measured by PTR-MS, FTIR, and GC from tropical biomass burning
Atmospheric Chemistry and Physics, 2007Co-Authors: T. G. Karl, T. J. Christian, Robert J. Yokelson, Paulo Artaxo, W. M. Hao, Anja GuentherAbstract:Volatile Organic Compound (VOC) emissions from fires in tropical forest fuels were quantified using Proton-Transfer-Reaction Mass Spectrometry (PTRMS), Fourier Transform Infrared Spectroscopy (FTIR) and gas chromatography (GC) coupled to PTRMS (GC-PTR-MS). We investigated VOC emissions from 19 controlled laboratory fires at the USFS (United States Forest Service) Fire Sciences Laboratory and 16 fires during an intensive airborne field campaign during the peak of the burning season in Brazil in 2004. The VOC emissions were dominated by oxygenated VOCs (OVOC) (OVOC/NMHC ~4:1, NMHC: non-methane hydrocarbons) The specificity of the PTR-MS instrument, which measures the mass to charge ratio of VOCs ionized by H3O+ ions, was validated by gas chromatography and by intercomparing in-situ measurements with those obtained from an open path FTIR instrument. Emission ratios for methyl vinyl ketone, methacrolein, crotonaldehyde, acrylonitrile and pyrrole were measured in the field for the first time. Our measurements show a higher contribution of OVOCs than previously assumed for modeling purposes. Comparison of fresh (1 h?1 d) smoke suggests altered emission ratios due to gas phase chemistry for acetone but not for acetaldehyde and methanol. Emission ratios for numerous, important, reactive VOCs with respect to acetonitrile (a biomass burning tracer) are presented.
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The tropical forest and fire emissions experiment: method evaluation of volatile Organic Compound emissions measured by PTR-MS, FTIR, and GC from tropical biomass burning
Atmospheric Chemistry and Physics Discussions, 2007Co-Authors: T. G. Karl, T. J. Christian, Robert J. Yokelson, Paulo Artaxo, Anja GuentherAbstract:Volatile Organic Compound (VOC) emissions from fires in tropical forest fuels were quantified using Proton-Transfer-Reaction Mass Spectrometry (PTRMS), Fourier Transformation Infrared Spectroscopy (FTIR) and gas chromatography (GC) coupled to PTRMS (GC-PTR-MS). We investigated VOC emissions from 19 controlled laboratory fires at the USFS Fire Sciences Laboratory and 16 fires during an intensive airborne field campaign during the peak of the burning season in Brazil in 2004. The VOC emissions were dominated by oxygenated VOCs (OVOC) (OVOC/NMHC ~4:1, NMHC: non-methane hydrocarbons) The specificity of the PTR-MS instrument, which measures the mass to charge ratio of VOCs ionized by H3O+ ions, was validated by gas chromatography and by intercomparing in-situ measurements with those obtained from an open path FTIR instrument. Emission ratios for methyl vinyl ketone, methacrolein, crotonaldehyde, acrylonitrile and pyrrole were measured in the field for the first time. Our measurements show a higher contribution of OVOCs than previously assumed for modeling purposes. Comparison of fresh (1hour-1day) smoke suggests altered emission ratios due to gas phase chemistry for acetone but not for acetaldehyde and methanol. Emission ratios for numerous, important, reactive VOCs with respect to acetonitrile (a biomass burning tracer) are presented.
Yoshihito Watanabe - One of the best experts on this subject based on the ideXlab platform.
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A New, Aqueous 1H NMR Shift Reagent Based on Host−Guest Molecular Recognition Principles for Organic Compound Structural Analysis: Non-covalent π−π and Hydrophobic Interactions Using a Supramolecular Host, [Cp*Rh(2‘-deoxyadenosine)]3(OTf)3
Journal of Organic Chemistry, 1998Co-Authors: Shigeyuki Nakamura, Kiyoshi Isobe, Yoshihito Watanabe, Hong Chen, Richard H. FishAbstract:We have discovered that the supramolecular host [Cp*Rh(2‘-deoxyadenosine)]3(OTf)3 (1, Cp* = η5-C5Me5, OTf = CF3SO3-) has utility as a new, aqueous 1H NMR shift reagent, via a host−guest molecular recognition process that occurs by non-covalent π−π and hydrophobic interactions, with a wide variety of H2O-soluble Organic substrates. These Organic Compound guests that we present, to illustrate the utility of host 1 as a novel, aqueous 1H NMR shift reagent, encompass examples such as aromatic carboxylic acids, phenylacetic acid (G1), 1-naphthoic acid (G2), and 2-naphthoic acid (G3), an aliphatic carboxylic acid, cyclohexylacetic acid (G4), as well as biological Compounds, a di- and a tetrapeptide containing terminal l-tryptophan (Trp) or l-phenylalanine (Phe) groups, l-Trp-l-Phe (G5) and l-Trp-l-Met-l-Asp-l-Phe amide (G6) in the pH range 5−10. A discussion of the molecular recognition parameters that effect the 1H NMR shifts of the Organic guests and a comparison with the water-soluble lanthanide shift reagen...
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a new aqueous 1h nmr shift reagent based on host guest molecular recognition principles for Organic Compound structural analysis non covalent π π and hydrophobic interactions using a supramolecular host cp rh 2 deoxyadenosine 3 otf 3
Journal of Organic Chemistry, 1998Co-Authors: Shigeyuki Nakamura, Kiyoshi Isobe, Yoshihito Watanabe, Hong Chen, Richard H. FishAbstract:We have discovered that the supramolecular host [Cp*Rh(2‘-deoxyadenosine)]3(OTf)3 (1, Cp* = η5-C5Me5, OTf = CF3SO3-) has utility as a new, aqueous 1H NMR shift reagent, via a host−guest molecular recognition process that occurs by non-covalent π−π and hydrophobic interactions, with a wide variety of H2O-soluble Organic substrates. These Organic Compound guests that we present, to illustrate the utility of host 1 as a novel, aqueous 1H NMR shift reagent, encompass examples such as aromatic carboxylic acids, phenylacetic acid (G1), 1-naphthoic acid (G2), and 2-naphthoic acid (G3), an aliphatic carboxylic acid, cyclohexylacetic acid (G4), as well as biological Compounds, a di- and a tetrapeptide containing terminal l-tryptophan (Trp) or l-phenylalanine (Phe) groups, l-Trp-l-Phe (G5) and l-Trp-l-Met-l-Asp-l-Phe amide (G6) in the pH range 5−10. A discussion of the molecular recognition parameters that effect the 1H NMR shifts of the Organic guests and a comparison with the water-soluble lanthanide shift reagen...
Kiyoshi Isobe - One of the best experts on this subject based on the ideXlab platform.
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A New, Aqueous 1H NMR Shift Reagent Based on Host−Guest Molecular Recognition Principles for Organic Compound Structural Analysis: Non-covalent π−π and Hydrophobic Interactions Using a Supramolecular Host, [Cp*Rh(2‘-deoxyadenosine)]3(OTf)3
Journal of Organic Chemistry, 1998Co-Authors: Shigeyuki Nakamura, Kiyoshi Isobe, Yoshihito Watanabe, Hong Chen, Richard H. FishAbstract:We have discovered that the supramolecular host [Cp*Rh(2‘-deoxyadenosine)]3(OTf)3 (1, Cp* = η5-C5Me5, OTf = CF3SO3-) has utility as a new, aqueous 1H NMR shift reagent, via a host−guest molecular recognition process that occurs by non-covalent π−π and hydrophobic interactions, with a wide variety of H2O-soluble Organic substrates. These Organic Compound guests that we present, to illustrate the utility of host 1 as a novel, aqueous 1H NMR shift reagent, encompass examples such as aromatic carboxylic acids, phenylacetic acid (G1), 1-naphthoic acid (G2), and 2-naphthoic acid (G3), an aliphatic carboxylic acid, cyclohexylacetic acid (G4), as well as biological Compounds, a di- and a tetrapeptide containing terminal l-tryptophan (Trp) or l-phenylalanine (Phe) groups, l-Trp-l-Phe (G5) and l-Trp-l-Met-l-Asp-l-Phe amide (G6) in the pH range 5−10. A discussion of the molecular recognition parameters that effect the 1H NMR shifts of the Organic guests and a comparison with the water-soluble lanthanide shift reagen...
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a new aqueous 1h nmr shift reagent based on host guest molecular recognition principles for Organic Compound structural analysis non covalent π π and hydrophobic interactions using a supramolecular host cp rh 2 deoxyadenosine 3 otf 3
Journal of Organic Chemistry, 1998Co-Authors: Shigeyuki Nakamura, Kiyoshi Isobe, Yoshihito Watanabe, Hong Chen, Richard H. FishAbstract:We have discovered that the supramolecular host [Cp*Rh(2‘-deoxyadenosine)]3(OTf)3 (1, Cp* = η5-C5Me5, OTf = CF3SO3-) has utility as a new, aqueous 1H NMR shift reagent, via a host−guest molecular recognition process that occurs by non-covalent π−π and hydrophobic interactions, with a wide variety of H2O-soluble Organic substrates. These Organic Compound guests that we present, to illustrate the utility of host 1 as a novel, aqueous 1H NMR shift reagent, encompass examples such as aromatic carboxylic acids, phenylacetic acid (G1), 1-naphthoic acid (G2), and 2-naphthoic acid (G3), an aliphatic carboxylic acid, cyclohexylacetic acid (G4), as well as biological Compounds, a di- and a tetrapeptide containing terminal l-tryptophan (Trp) or l-phenylalanine (Phe) groups, l-Trp-l-Phe (G5) and l-Trp-l-Met-l-Asp-l-Phe amide (G6) in the pH range 5−10. A discussion of the molecular recognition parameters that effect the 1H NMR shifts of the Organic guests and a comparison with the water-soluble lanthanide shift reagen...
