Induced circular dichroism in the 2-benzoylbenzoate anion paired with polymer-supported optically active quaternary ammonium ions

1982 ◽  
pp. 1103 ◽  
Author(s):  
David C. Sherrington ◽  
Roberto Solaro ◽  
Emo Chiellini
Keyword(s):  
Circular Dichroism ◽  
Quaternary Ammonium ◽  
Optically Active ◽  
Induced Circular Dichroism ◽  
Ammonium Ions ◽  
Quaternary Ammonium Ions ◽  
Polymer Supported ◽  
Circular Dichroïsm

Optical Activity of Symmetric Compounds in Chiral Media. I. Induced Circular Dichroism of Unbound Substrates

1971 ◽  
Vol 49 (4) ◽  
pp. 624-631 ◽  
Author(s):  
L. D. Hayward ◽  
R. N. Totty
Keyword(s):  
Circular Dichroism ◽  
Carbonyl Compounds ◽  
Optical Rotation ◽  
Optically Active ◽  
Asymmetric Induction ◽  
Azo Compounds ◽  
Induced Circular Dichroism ◽  
Chiral Media ◽  
Circular Dichroïsm ◽  
Rotational Strengths

In the presence of chiral environment compounds, C, optical rotation is induced in symmetric substrates, S, and may be detected as circular dichroism in the electronic spectra of the solutions. Thus the n − π* transitions of symmetric and racemic carbonyl compounds, and of symmetric nitro and azo compounds, become optically active when these S are dissolved in chiral hydrocarbons, ketones, or carbinols, or in solutions of these C in achiral solvents. The rotational strengths of the induced circular dichroism bands of S are solvent, temperature, and concentration dependent. Only limited correlation of the sign and magnitude of the induced bands with the stereochemistry of C and S is evident on the data so far accumulated. Halogenated achiral solvents enhance the intensity, and, in some cases reverse the sign of the induced bands.A new mechanism of asymmetric induction is proposed in which specific bonding of C with S is not prerequisite.

Optically active multi-helical erythrocyte-like Ln(OH)CO3 (Ln = La, Ce, Pr and Sm)

2016 ◽  
Vol 18 (30) ◽  
pp. 20261-20265 ◽  
Author(s):  
Jing Chen ◽  
Songmei Li ◽  
Juan Du ◽  
Bo Wang ◽  
Shiming Meng ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Conduction Band ◽  
Optically Active ◽  
Induced Circular Dichroism ◽  
Coupling Effects ◽  
Chiral Structure ◽  
Left Handed ◽  
Circular Dichroïsm

Hierarchical erythrocyte-like Ln(OH)CO3 with nanosized chiral structure-induced circular dichroism responses, assigned to valence to conduction band transitions and coupling effects between the left-handed-assembled Ln(OH)CO3 nanorods in the multi-helical RBC-like architecture.

The Effect of Molecular Isomerism on the Induced Circular Dichroism of Cadmium Sulfide Quantum Dots

2021 ◽  
Author(s):  
Yoonbin Joh ◽  
Yuri H KWON ◽  
Shambhavi Tannir ◽  
Brian Leonard ◽  
Jan Kubelka ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Circular Dichroism ◽  
Cadmium Sulfide ◽  
Ligand Exchange ◽  
Phase Transfer ◽  
Optically Active ◽  
Colloidal Nanocrystals ◽  
Induced Circular Dichroism ◽  
Synthetic Phase ◽  
Circular Dichroïsm

Post-synthetic phase transfer ligand exchange has been established as a simple, reliable, and versatile method for the synthesis of chiral, optically active colloidal nanocrystals displaying circular dichroism (CD) and circularly...

Sign in / Sign up

Export Citation Format

Share Document