NDLI: Guest-induced inversion of an asymmetric host layer in inclusion crystals of cholic acid

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Guest-induced inversion of an asymmetric host layer in inclusion crystals of cholic acid

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Back matter

CrystEngComm Vol - 8 Issue - 5

CrystEngComm Vol - 8 Issue - 4

CrystEngComm Vol - 8 Issue - 3

CrystEngComm Vol - 8 Issue - 2

Guest-induced inversion of an asymmetric host layer in inclusion crystals of cholic acid

Content Provider	Royal Society of Chemistry (RSC)
Author	Aburaya, Kazuaki Nakano, Kazunori Yoswathananont, Nungruethai Tohnai, Norimitsu Sada, Kazuki Nakagawa, Kenji Miyata, Mikiji
Copyright Year	2006
Abstract	Cholic acid, a typical asymmetric host, forms inclusion crystals with six 1,2,3-trisubstituted benzenes and five 1,2,4-trisubstituted benzenes as guests. All the eleven crystals have a bilayer structure composed of hydrophilic and lipophilic layers. The guest molecules are included in one-dimensional (1-D) cavities within the lipophilic layers, where the host molecules array in an antiparallel mode. On the other hand, in the absence of host–guest hydrogen bonds, the host arrangements in the hydrophilic layers change depending on the guest shape; 1,2,3- and 1,2,4-trisubstituted benzenes give the parallel and antiparallel arrangements that are categorized into shv and shv# patterns, respectively. The former crystals have a size-fit relationship between the guest molecule and the host cavity lesser than usual inclusion crystals involving the latter crystals. Therefore, the shape-fit relationship plays an important role in the formation of the host arrangements with the shv pattern. Moreover, the crystal structures of cholic acid with 1,2,3-trisubstituted benzenes are similar to those of deoxycholic acid with the identical guests. This is a rare example that hosts with a different number of hydroxyl groups in their molecular structure form an isomorphous crystal structure.
Starting Page	461
Ending Page	467
Page Count	7
File Format	HTM / HTML PDF
ISSN	14668033
Volume Number	8
Issue Number	6
Journal	CrystEngComm
DOI	10.1039/b602862d
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	Acid Hydroxy group Hydrophile Lipophilicity Hydrogen bond
Content Type	Text
Resource Type	Article
Subject	Chemistry Condensed Matter Physics Materials Science

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