scholarly journals Synthesis of Chiral Helic[1]triptycene[3]arenes and Their Enantioselective Recognition towards Chiral Guests Containing Aminoindan Groups

Molecules ◽  
2021 ◽  
Vol 26 (3) ◽  
pp. 536
Author(s):  
Jing Li ◽  
Ying Han ◽  
Chuan-Feng Chen
Keyword(s):  
Circular Dichroism ◽  
Single Crystal ◽  
Crystal Structures ◽  
Ammonium Salts ◽  
Cd Spectra ◽  
X Ray ◽  
Enantioselective Recognition ◽  
Single Crystal Structures ◽  
Recognition Ability ◽  
Circular Dichroïsm

Starting from the enantiopure precursors, a pair of chiral macrocyclic arenes named helic[1]triptycene[3]arenes were conveniently synthesized. The circular dichroism (CD) spectra of the enantiomeric macrocyclic arenes exhibited mirror images, and the X-ray single crystal structures confirmed their absolute conformations as well. Moreover, the macrocyclic arenes showed strong complexation with secondary ammonium and primary ammonium salts containing aminoindan groups. In particular, the chiral macrocyclic arenes exhibited enantioselective recognition ability towards the chiral secondary ammonium salts containing aminoindan groups with an enantioselective ratio up to 3.89.

Element selective magnetism in Ho0.5Nd0.5Fe3(BO3)4 single crystal probed with hard X-ray magnetic circular dichroism

2019 ◽  
Vol 479 ◽  
pp. 312-316 ◽  
Author(s):  
Mikhail Platunov ◽  
Natalia Kazak ◽  
Viacheslav Dudnikov ◽  
Vladislav Temerov ◽  
Irina Gudim ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Single Crystal ◽  
Magnetic Circular Dichroism ◽  
X Ray ◽  
Circular Dichroïsm

Coordination Chemistry of Diselenophosphinate Complexes:  The X-ray Single-Crystal Structures of [K(Se2PPh2)(THF)2]2and [In(Se2PPh2)3]·L (L = THF, PhMe)

2004 ◽  
Vol 43 (16) ◽  
pp. 4802-4804 ◽  
Author(s):  
Robert P. Davies ◽  
Claire V. Francis ◽  
Andrew P. S. Jurd ◽  
M. Giovanna Martinelli ◽  
Andrew J. P. White ◽  
...  
Keyword(s):  
Coordination Chemistry ◽  
Single Crystal ◽  
Crystal Structures ◽  
X Ray ◽  
Single Crystal Structures

Synthesis and properties of palladium(II) complexes of aromatic hemiporphyrazines

2014 ◽  
Vol 18 (10n11) ◽  
pp. 869-874 ◽  
Author(s):  
Atsuya Muranaka ◽  
Fumiko Kyotani ◽  
Xingmei Ouyang ◽  
Daisuke Hashizume ◽  
Masanobu Uchiyama
Keyword(s):  
Circular Dichroism ◽  
Single Crystal ◽  
Electronic Properties ◽  
Magnetic Circular Dichroism ◽  
X Ray ◽  
Metal Free ◽  
Circular Dichroïsm ◽  
Macrocyclic Cavity

Palladium(II) complexes of aromatic hemiporphyrazines were prepared by the reaction of bis(dibenzylideneacetone)palladium(0) with the corresponding metal-free macrocycles. Single crystal X-ray analysis revealed that a palladium(II) ion was coordinated inside the macrocyclic cavity to form two Pd – C bonds. Electronic properties of the metalloorganic compounds were characterized by NMR, UV-vis-NIR, and magnetic circular dichroism (MCD) spectroscopy.

scholarly journals Hydrogels formed from Fmoc amino acids

CrystEngComm ◽  
2015 ◽  
Vol 17 (42) ◽  
pp. 8047-8057 ◽  
Author(s):  
Emily R. Draper ◽  
Kyle L. Morris ◽  
Marc A. Little ◽  
Jaclyn Raeburn ◽  
Catherine Colquhoun ◽  
...  
Keyword(s):  
Amino Acids ◽  
Molecular Weight ◽  
Single Crystal ◽  
Crystal Structures ◽  
Diffraction Data ◽  
Low Molecular Weight ◽  
X Ray Diffraction ◽  
X Ray ◽  
Single Crystal Structures

A number of Fmoc amino acids can be effective low molecular weight hydrogelators; we compare single crystal structures to fibre X-ray diffraction data.

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