The Experts below are selected from a list of 190590 Experts worldwide ranked by ideXlab platform
Robert Schlögl - One of the best experts on this subject based on the ideXlab platform.
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In situ UV‐VIS diffuse reflectance Spectroscopy of reduction–reoxidation of heteropoly compounds by methanol and ethanol: a correlation between spectroscopic and catalytic data
Catalysis Letters, 1999Co-Authors: Jörg Melsheimer, G. Mestl, Sabri S. Mahmoud, Robert SchlöglAbstract:The degree of reduction/oxidation of H_4PVMo_11O_40 (HPA) and Cs_2H_2PVMo_11O_40 (CsPA) was studied during reduction and reoxidation by methanol, ethanol and mixtures with oxygen, respectively. The peak intensity of the intervalence charge transfer (IVCT) band, the apparent band gap energy (E _g ^* ) and catalytic data were obtained by in situ UV‐VIS diffuse reflectance spectrosccopy (UV‐VIS‐DRS) and on‐line gas chromatography (GC), respectively. The peak intensity of the IVCT band and E _g ^* increase during the reduction of heteropoly compounds by the alcohols. The spectroscopic and catalytic data (conversion, selectivity) correlate in the transient state during the reoxidation process. It is shown that isolated Keggin anions act as precursors for the active states of the catalysts, which molecular structure cannot be deduced from UV‐VIS Spectroscopy alone. UV‐VIS Spectroscopy, however, can serve as a tool to determine the degree of reduction in future combined in situ UV‐VIS/Raman/XRD studied.
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in situ uv vis diffuse reflectance Spectroscopy of reduction reoxidation of heteropoly compounds by methanol and ethanol a correlation between spectroscopic and catalytic data
Catalysis Letters, 1999Co-Authors: Jörg Melsheimer, G. Mestl, Sabri S. Mahmoud, Robert SchlöglAbstract:The degree of reduction/oxidation of H4PVMo11O40 (HPA) and Cs2H2PVMo11O40 (CsPA) was studied during reduction and reoxidation by methanol, ethanol and mixtures with oxygen, respectively. The peak intensity of the intervalence charge transfer (IVCT) band, the apparent band gap energy (Eg*) and catalytic data were obtained by in situ UV‐VIS diffuse reflectance spectrosccopy (UV‐VIS‐DRS) and on‐line gas chromatography (GC), respectively. The peak intensity of the IVCT band and Eg* increase during the reduction of heteropoly compounds by the alcohols. The spectroscopic and catalytic data (conversion, selectivity) correlate in the transient state during the reoxidation process. It is shown that isolated Keggin anions act as precursors for the active states of the catalysts, which molecular structure cannot be deduced from UV‐VIS Spectroscopy alone. UV‐VIS Spectroscopy, however, can serve as a tool to determine the degree of reduction in future combined in situ UV‐VIS/Raman/XRD studied.
Jörg Melsheimer - One of the best experts on this subject based on the ideXlab platform.
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In situ UV‐VIS diffuse reflectance Spectroscopy of reduction–reoxidation of heteropoly compounds by methanol and ethanol: a correlation between spectroscopic and catalytic data
Catalysis Letters, 1999Co-Authors: Jörg Melsheimer, G. Mestl, Sabri S. Mahmoud, Robert SchlöglAbstract:The degree of reduction/oxidation of H_4PVMo_11O_40 (HPA) and Cs_2H_2PVMo_11O_40 (CsPA) was studied during reduction and reoxidation by methanol, ethanol and mixtures with oxygen, respectively. The peak intensity of the intervalence charge transfer (IVCT) band, the apparent band gap energy (E _g ^* ) and catalytic data were obtained by in situ UV‐VIS diffuse reflectance spectrosccopy (UV‐VIS‐DRS) and on‐line gas chromatography (GC), respectively. The peak intensity of the IVCT band and E _g ^* increase during the reduction of heteropoly compounds by the alcohols. The spectroscopic and catalytic data (conversion, selectivity) correlate in the transient state during the reoxidation process. It is shown that isolated Keggin anions act as precursors for the active states of the catalysts, which molecular structure cannot be deduced from UV‐VIS Spectroscopy alone. UV‐VIS Spectroscopy, however, can serve as a tool to determine the degree of reduction in future combined in situ UV‐VIS/Raman/XRD studied.
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in situ uv vis diffuse reflectance Spectroscopy of reduction reoxidation of heteropoly compounds by methanol and ethanol a correlation between spectroscopic and catalytic data
Catalysis Letters, 1999Co-Authors: Jörg Melsheimer, G. Mestl, Sabri S. Mahmoud, Robert SchlöglAbstract:The degree of reduction/oxidation of H4PVMo11O40 (HPA) and Cs2H2PVMo11O40 (CsPA) was studied during reduction and reoxidation by methanol, ethanol and mixtures with oxygen, respectively. The peak intensity of the intervalence charge transfer (IVCT) band, the apparent band gap energy (Eg*) and catalytic data were obtained by in situ UV‐VIS diffuse reflectance spectrosccopy (UV‐VIS‐DRS) and on‐line gas chromatography (GC), respectively. The peak intensity of the IVCT band and Eg* increase during the reduction of heteropoly compounds by the alcohols. The spectroscopic and catalytic data (conversion, selectivity) correlate in the transient state during the reoxidation process. It is shown that isolated Keggin anions act as precursors for the active states of the catalysts, which molecular structure cannot be deduced from UV‐VIS Spectroscopy alone. UV‐VIS Spectroscopy, however, can serve as a tool to determine the degree of reduction in future combined in situ UV‐VIS/Raman/XRD studied.
David Shugar - One of the best experts on this subject based on the ideXlab platform.
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UV–Vis Spectroscopy of tyrosine side-groups in studies of protein structure. Part 2: selected applications
Biophysical Reviews, 2016Co-Authors: Jan M. Antosiewicz, David ShugarAbstract:In Part 2 we discuss application of several different types of UV–Vis Spectroscopy, such as normal, difference, and second-derivative UV absorption Spectroscopy, fluorescence Spectroscopy, linear and circular dichroism Spectroscopy, and Raman Spectroscopy, of the side-chain of tyrosine residues in different molecular environments. We review the ways these spectroscopies can be used to probe complex protein structures.
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UV–Vis Spectroscopy of tyrosine side-groups in studies of protein structure. Part 1: basic principles and properties of tyrosine chromophore
Biophysical Reviews, 2016Co-Authors: Jan M. Antosiewicz, David ShugarAbstract:Spectroscopic properties of tyrosine residues may be employed in structural studies of proteins. Here we discuss several different types of UV–Vis Spectroscopy, like normal, difference and second-derivative UV absorption Spectroscopy, fluorescence Spectroscopy, linear and circular dichroism Spectroscopy, and Raman Spectroscopy, and corresponding optical properties of the tyrosine chromophore, phenol, which are used to study protein structure.
Sabri S. Mahmoud - One of the best experts on this subject based on the ideXlab platform.
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In situ UV‐VIS diffuse reflectance Spectroscopy of reduction–reoxidation of heteropoly compounds by methanol and ethanol: a correlation between spectroscopic and catalytic data
Catalysis Letters, 1999Co-Authors: Jörg Melsheimer, G. Mestl, Sabri S. Mahmoud, Robert SchlöglAbstract:The degree of reduction/oxidation of H_4PVMo_11O_40 (HPA) and Cs_2H_2PVMo_11O_40 (CsPA) was studied during reduction and reoxidation by methanol, ethanol and mixtures with oxygen, respectively. The peak intensity of the intervalence charge transfer (IVCT) band, the apparent band gap energy (E _g ^* ) and catalytic data were obtained by in situ UV‐VIS diffuse reflectance spectrosccopy (UV‐VIS‐DRS) and on‐line gas chromatography (GC), respectively. The peak intensity of the IVCT band and E _g ^* increase during the reduction of heteropoly compounds by the alcohols. The spectroscopic and catalytic data (conversion, selectivity) correlate in the transient state during the reoxidation process. It is shown that isolated Keggin anions act as precursors for the active states of the catalysts, which molecular structure cannot be deduced from UV‐VIS Spectroscopy alone. UV‐VIS Spectroscopy, however, can serve as a tool to determine the degree of reduction in future combined in situ UV‐VIS/Raman/XRD studied.
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in situ uv vis diffuse reflectance Spectroscopy of reduction reoxidation of heteropoly compounds by methanol and ethanol a correlation between spectroscopic and catalytic data
Catalysis Letters, 1999Co-Authors: Jörg Melsheimer, G. Mestl, Sabri S. Mahmoud, Robert SchlöglAbstract:The degree of reduction/oxidation of H4PVMo11O40 (HPA) and Cs2H2PVMo11O40 (CsPA) was studied during reduction and reoxidation by methanol, ethanol and mixtures with oxygen, respectively. The peak intensity of the intervalence charge transfer (IVCT) band, the apparent band gap energy (Eg*) and catalytic data were obtained by in situ UV‐VIS diffuse reflectance spectrosccopy (UV‐VIS‐DRS) and on‐line gas chromatography (GC), respectively. The peak intensity of the IVCT band and Eg* increase during the reduction of heteropoly compounds by the alcohols. The spectroscopic and catalytic data (conversion, selectivity) correlate in the transient state during the reoxidation process. It is shown that isolated Keggin anions act as precursors for the active states of the catalysts, which molecular structure cannot be deduced from UV‐VIS Spectroscopy alone. UV‐VIS Spectroscopy, however, can serve as a tool to determine the degree of reduction in future combined in situ UV‐VIS/Raman/XRD studied.
G. Mestl - One of the best experts on this subject based on the ideXlab platform.
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In situ UV‐VIS diffuse reflectance Spectroscopy of reduction–reoxidation of heteropoly compounds by methanol and ethanol: a correlation between spectroscopic and catalytic data
Catalysis Letters, 1999Co-Authors: Jörg Melsheimer, G. Mestl, Sabri S. Mahmoud, Robert SchlöglAbstract:The degree of reduction/oxidation of H_4PVMo_11O_40 (HPA) and Cs_2H_2PVMo_11O_40 (CsPA) was studied during reduction and reoxidation by methanol, ethanol and mixtures with oxygen, respectively. The peak intensity of the intervalence charge transfer (IVCT) band, the apparent band gap energy (E _g ^* ) and catalytic data were obtained by in situ UV‐VIS diffuse reflectance spectrosccopy (UV‐VIS‐DRS) and on‐line gas chromatography (GC), respectively. The peak intensity of the IVCT band and E _g ^* increase during the reduction of heteropoly compounds by the alcohols. The spectroscopic and catalytic data (conversion, selectivity) correlate in the transient state during the reoxidation process. It is shown that isolated Keggin anions act as precursors for the active states of the catalysts, which molecular structure cannot be deduced from UV‐VIS Spectroscopy alone. UV‐VIS Spectroscopy, however, can serve as a tool to determine the degree of reduction in future combined in situ UV‐VIS/Raman/XRD studied.
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in situ uv vis diffuse reflectance Spectroscopy of reduction reoxidation of heteropoly compounds by methanol and ethanol a correlation between spectroscopic and catalytic data
Catalysis Letters, 1999Co-Authors: Jörg Melsheimer, G. Mestl, Sabri S. Mahmoud, Robert SchlöglAbstract:The degree of reduction/oxidation of H4PVMo11O40 (HPA) and Cs2H2PVMo11O40 (CsPA) was studied during reduction and reoxidation by methanol, ethanol and mixtures with oxygen, respectively. The peak intensity of the intervalence charge transfer (IVCT) band, the apparent band gap energy (Eg*) and catalytic data were obtained by in situ UV‐VIS diffuse reflectance spectrosccopy (UV‐VIS‐DRS) and on‐line gas chromatography (GC), respectively. The peak intensity of the IVCT band and Eg* increase during the reduction of heteropoly compounds by the alcohols. The spectroscopic and catalytic data (conversion, selectivity) correlate in the transient state during the reoxidation process. It is shown that isolated Keggin anions act as precursors for the active states of the catalysts, which molecular structure cannot be deduced from UV‐VIS Spectroscopy alone. UV‐VIS Spectroscopy, however, can serve as a tool to determine the degree of reduction in future combined in situ UV‐VIS/Raman/XRD studied.
