Circular dichroism of N-thiobenzoyl-L-α-amino-acids. Part III. Their circular dichroism through the near-ultraviolet wavelength range

1967 ◽  
Vol 0 (0) ◽  
pp. 1-5 ◽  
Author(s):  
G. C. Barrett
Keyword(s):  
Amino Acids ◽  
Circular Dichroism ◽  
Wavelength Range ◽  
Near Ultraviolet ◽  
Ultraviolet Wavelength ◽  
Circular Dichroïsm

scholarly journals Biomimetic gyroid nanostructures exceeding their natural origins

2016 ◽  
Vol 2 (5) ◽  
pp. e1600084 ◽  
Author(s):  
Zongsong Gan ◽  
Mark D. Turner ◽  
Min Gu
Keyword(s):  
Circular Dichroism ◽  
Mechanical Strength ◽  
Three Dimensional ◽  
Wavelength Region ◽  
Fabrication Technique ◽  
Artificial Structures ◽  
Near Ultraviolet ◽  
Ultraviolet Wavelength ◽  
Butterfly Wings ◽  
Circular Dichroïsm

Using optical two-beam lithography with improved resolution and enhanced mechanical strength, we demonstrate the replication of gyroid photonic nanostructures found in the butterflyCallophrys rubi. These artificial structures are shown to have size, controllability, and uniformity that are superior to those of their biological counterparts. In particular, the elastic Young’s modulus of fabricated nanowires is enhanced by up to 20%. As such, the circular dichroism enabled by the gyroid nanostructures can operate in the near-ultraviolet wavelength region, shorter than that supported by the natural butterfly wings ofC. rubi. This fabrication technique provides a unique tool for extracting three-dimensional photonic designs from nature and will aid the investigation of biomimetic nanostructures.

Circulardichroismusuntersuchungen von Polyalkohol- und Zucker-Vanadat(V)-Komplexen / Circular Dichroism Studies of Polyalcohol and Sugar Vanadate(V) Complexes

1989 ◽  
Vol 44 (11) ◽  
pp. 1464-1472 ◽  
Author(s):  
Hermann Bauer ◽  
Jeanine Brun ◽  
Alexius R. Hernanto ◽  
Wolfgang Voelter ◽  
Spyridon Paraskewas
Keyword(s):  
Circular Dichroism ◽  
Wavelength Range ◽  
Optically Active ◽  
Hydroxyl Groups ◽  
Pyranose Ring ◽  
Cotton Effects ◽  
Circular Dichroïsm

The complexes of tetravanadate ions with optically active polyols and carbohydrates with suitable steric properties show up to four separate cotton effects in the wavelength range of λ = 200-350 nm. Thus it is possible to classify pyranoses into four groups according to their circular dichroitic behaviour and determine the configuration and the conformation of the hydroxyl groups attached to the pyranose ring.

Circular dichroism of palladium(II) complexes of amino acids and peptides

1970 ◽  
Vol 9 (3) ◽  
pp. 528-532 ◽  
Author(s):  
Edmond Woodrow Wilson ◽  
Robert Bruce Martin
Keyword(s):  
Amino Acids ◽  
Circular Dichroism ◽  
Circular Dichroïsm

Circular dichroism spectra of amino acid complexes. II. Chelated amino acid complexes with the CoN5O chromophore

1970 ◽  
Vol 23 (9) ◽  
pp. 1735 ◽  
Author(s):  
CJ Hawkins ◽  
PJ Lawson
Keyword(s):  
Amino Acids ◽  
Circular Dichroism ◽  
Amino Acid ◽  
Visible Region ◽  
Optically Active ◽  
Circular Dichroism Spectra ◽  
Amino Acid Complexes ◽  
Similar Series ◽  
Cotton Effects ◽  
Circular Dichroïsm

The circular dichroism spectra of a series of optically active (α-aminocarboxylato)tetraamminecobalt(111) complexes have been measured in aqueous solution, and in the presence of salts of polarizable anions. The observed spectra in the visible region have been analysed to determine the signs of the Cotton effects of the three components of the 1A1g ↔ 1T1g cobalt(111) transition. For L-amino acids, the transition with A2g(D4h) parentage is negative, and the two transitions with Eg(D4h) parentage have opposite signs. Published circular dichroism spectra of complexes of the type [Co(en)2(L-am)]2+ were similarly interpreted in terms of a perturbed tetragonal chromophore, and it was shown that the vicinal effect of the L-amino acids imposed the same signs onto the component transitions as for the tetraammines and for a similar series of pentaamminecobalt(111) complexes.

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