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Epiafzelechin from the root bark of Cassia sieberiana: detection by DART mass spectrometry, spectroscopic characterization, and antioxidant properties.
The root bark of Cassia sieberiana was analyzed using direct analysis in real time mass spectrometry, and a main flavonoid component with an [M + H](+) mass of 275 was identified. The flavonoid,Expand
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Absolute configurations of fungal and plant metabolites by chiroptical methods. ORD, ECD, and VCD studies on phyllostin, scytolide, and oxysporone.
The absolute configuration (AC) of the bioactive metabolites phyllostin (1) and scytolide (2), two hexahydro-1,4-benzodioxines produced by Phyllosticta cirsii, and oxysporone (3), aExpand
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Structural transitions in polyriboadenylic acid induced by the changes in pH and temperature: vibrational circular dichroism study in solution and film states.
A correlation of the changes in vibrational absorption and vibrational circular dichroism (VCD) spectral features with the structural changes of polyriboadenylic acid (polyA) as a function of pH isExpand
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Bulky melamine-based Zn-porphyrin tweezer as a CD probe of molecular chirality.
The transfer of chirality from a guest molecule to an achiral host is the subject of significant interest especially when, upon chiral induction, the chiroptical response of the host/guest complexExpand
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Absolute configuration of 3,3'-diphenyl-[2,2'-binaphthalene]-1,1'-diol revisited.
The experimental vibrational circular dichroism, electronic circular dichroism, and optical rotatory dispersion spectra and corresponding quantum chemical predictions ofExpand
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Determination of the absolute stereochemistry of chiral biphenanthryls in solution phase using chiroptical spectroscopic methods: 2,2'-Diphenyl-[3,3'-biphenanthrene]-4,4'-diol.
Although the exciton coupling model has been widely used in the literature to suggest the absolute configuration using electronic circular dichroism (ECD) spectra, chiral biphenanthryl systems areExpand
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Probing molecular chirality by CD-sensitive dimeric metalloporphyrin hosts.
This feature article reviews dimeric metalloporphyrin hosts employed as chirality probes in chiral recognition processes involving synthetic compounds and natural products. Upon formation of a chiralExpand
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Intrinsic rotation and molecular structure.
The intrinsic rotation, limiting value of specific rotation at zero concentration, of (R)-(-)-epichlorohydrin was measured in four different solvents, CH(3)OH, CH(2)Cl(2), CHCl(3) and CCl(4). It wasExpand
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Role of environmental factors on the structure and spectroscopic response of 5'-DNA-porphyrin conjugates caused by changes in the porphyrin-porphyrin interactions.
We have explored the utility, strength, and limitation of through-space exciton-coupled circular dichroism in determination of the secondary structure of optically active chromophoric nanoarraysExpand
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