“Induced Fit” in Chiral Recognition: Epimerization upon Dimerization in the Hierarchical Self‐Assembly of Helicate‐type Titanium(IV) Complexes

2011 ◽  
Vol 50 (12) ◽  
pp. 2850-2853 ◽  
Author(s):  
Markus Albrecht ◽  
Elisabeth Isaak ◽  
Miriam Baumert ◽  
Verena Gossen ◽  
Gerhard Raabe ◽  
...  
Keyword(s):  
Self Assembly ◽  
Chiral Recognition ◽  
Induced Fit

Chiral Molecular Cavities of Calix[4]Crown on Au(111)

2008 ◽  
Vol 8 (11) ◽  
pp. 5702-5707 ◽  
Author(s):  
Ge-Bo Pan ◽  
Jun Luo ◽  
Qi-Yu Zheng ◽  
Li-Jun Wan
Keyword(s):  
Self Assembly ◽  
Chiral Recognition ◽  
Scanning Tunneling ◽  
Racemic Mixture ◽  
Tunneling Microscopy ◽  
Geometrical Structures ◽  
Simple Method ◽  
Ordered Structures ◽  
Ordered Arrays ◽  
Stm Images

Well-ordered arrays of chiral molecular cavities have been constructed by self-assembly of inherently chiral calix[4]crown on Au(111) in 0.1 M HClO4 solution and investigated by scanning tunneling microscopy (STM). The chiral features are clearly observed in high resolution STM images. It is found that the adsorption of the two enantiomers results in the same ordered structures with upright orientation on Au(111). Moreover, only phase separation has been observed for the racemic mixture of the two enantiomers in the experiment. This is mainly due to the weak molecule-substrate interaction as well as asymmetric geometrical structures of the two enantiomers. The present study provides a simple method for construction of ordered arrays of chiral molecular cavities, which are of potential in chemical sensors, chiral recognition, and nonlinear optics.

scholarly journals Chirality, Gelation Ability and Crystal Structure: Together or Apart? Alkyl Phenyl Ethers of Glycerol as Simple LMWGs

Symmetry ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 732
Author(s):  
Alexander A. Bredikhin ◽  
Aidar T. Gubaidullin ◽  
Zemfira A. Bredikhina ◽  
Robert R. Fayzullin ◽  
Olga A. Lodochnikova
Keyword(s):  
Self Assembly ◽  
Chiral Recognition ◽  
Soft Materials ◽  
Gelling Agent ◽  
Low Molecular Weight ◽  
X Ray Diffraction ◽  
X Ray ◽  
Different Types ◽  
Low Molecular Weight Gelators ◽  
Phenyl Ethers

Chiral recognition plays an important role in the self-assembly of soft materials, in particular supramolecular organogels formed by low molecular weight gelators (LMWGs). Out of 14 pairs of the studied racemic and enantiopure samples of alkyl-substituted phenyl ethers of glycerol, only eight enantiopure diols form the stable gels in nonane. The formation of gels from solutions was studied by polarimetry, and their degradation with the formation of xerogels was studied by the PXRD method. The revealed crystalline characteristics of all studied xerogels corresponded to those for crystalline samples of the parent gelators. In addition to those previously investigated, crystalline samples of enantiopure para-n-alkylphenyl glycerol ethers [alkyl = pentyl (5), hexyl (6), heptyl (7), octyl (8), nonyl (9)] and racemic 3-(3,5-dimethylphenoxy)propane-1,2-diol (rac-14) have been examined by single crystal X-ray diffraction analysis. Among 22 samples of compounds 1-14 studied by SC-XRD, seven different types of supramolecular motifs are identified, of which only two are realized in crystals of supramolecular gelators. An attempt was made to relate the ability to gel formation with the characteristics of the supramolecular motif of a potential gelling agent, and the frequency of formation of the motif, required for gelation, with the chiral characteristics of the sample.

Self-Assembly and Chiral Recognition of Chiral Cationic Gemini Surfactants

Langmuir ◽  
2018 ◽  
Vol 34 (43) ◽  
pp. 12924-12933 ◽  
Author(s):  
Lili Zhou ◽  
Jiling Yue ◽  
Yaxun Fan ◽  
Yilin Wang
Keyword(s):  
Self Assembly ◽  
Chiral Recognition ◽  
Gemini Surfactants ◽  
Cationic Gemini Surfactants

scholarly journals Chiral recognition and selection during the self-assembly process of protein-mimic macroanions

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Panchao Yin ◽  
Zhi-Ming Zhang ◽  
Hongjin Lv ◽  
Tao Li ◽  
Fadi Haso ◽  
...  
Keyword(s):  
Self Assembly ◽  
Chiral Recognition ◽  
The Self ◽  
Assembly Process

scholarly journals Breakdown of chiral recognition of amino acids in reduced dimensions

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Yongchan Jeong ◽  
Hyo Won Kim ◽  
JiYeon Ku ◽  
Jungpil Seo
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Self Assembly ◽  
Density Functional ◽  
Chiral Recognition ◽  
Density Functional Theory Calculations ◽  
The Self ◽  
Reduced Dimensions ◽  
Tunnelling Microscopy ◽  
Living Organisms

Abstract The homochirality of amino acids in living organisms is one of the great mysteries in the phenomena of life. To understand the chiral recognition of amino acids, we have used scanning tunnelling microscopy to investigate the self-assembly of molecules of the amino acid tryptophan (Trp) on Au(111). Earlier experiments showed only homochiral configurations in the self-assembly of amino acids, despite using a mixture of the two opposite enantiomers. In our study, we demonstrate that heterochiral configurations can be favored energetically when l- and d-Trp molecules are mixed to form self-assembly on the Au surface. Using density functional theory calculations, we show that the indole side chain strongly interacts with the Au surface, which reduces the system effectively to two-dimension, with chiral recognition disabled. Our study provides important insight into the recognition of the chirality of amino acid molecules in life.

A Chiral Recognition System Orchestrated by Self‐Assembly: Molecular Chirality, Self‐Assembly Morphology, and Fluorescence Response

2017 ◽  
Vol 56 (41) ◽  
pp. 12518-12522 ◽  
Author(s):  
Takao Noguchi ◽  
Bappaditya Roy ◽  
Daisuke Yoshihara ◽  
Junji Sakamoto ◽  
Tatsuhiro Yamamoto ◽  
...  
Keyword(s):  
Self Assembly ◽  
Chiral Recognition ◽  
Recognition System ◽  
Fluorescence Response ◽  
Molecular Chirality

Self-assembly and chiral recognition of quartz crystal microbalance chiral sensor

Chirality ◽  
2009 ◽  
pp. NA-NA ◽  
Author(s):  
Miao Li Luo ◽  
Wei Guang Zhang ◽  
Sheng Zhang ◽  
Jun Fan ◽  
Wen Cui Su ◽  
...  
Keyword(s):  
Quartz Crystal Microbalance ◽  
Self Assembly ◽  
Chiral Recognition ◽  
Quartz Crystal

Nucleic acids from self-assembly to induced-fit recognition

1997 ◽  
Vol 7 (3) ◽  
pp. 305-309 ◽  
Author(s):  
Eric Westhof ◽  
Dinshaw J Patel
Keyword(s):  
Nucleic Acids ◽  
Self Assembly ◽  
Induced Fit
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