Chiral aggregation phenomena. 1. Acid dependent chiral recognition in a monolayer

Arnett, Edward M.; Chao, Jean; Kinzig, Barbara; Stewart, M.; Thompson, Orlean

doi:10.1021/ja00485a060

Cited by 15 publications

(7 citation statements)

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“…All previous work on acetoxy radical recognized cage decarboxylation (k = 1.6 X 109 s'1)2 as the major pathway, with indications that cage-wall trapping by cyclohexene solvent is the only reaction which competes with decarboxylation; no authenticated noncage reactions were recognized. 3 We observe acetoxy reactions outside the cage which we attribute to ir-acetoxy and we attribute all previous work to -acetoxy. Acetoxy radical is generated in chain reactions of acetyl hypobromite (MeC02Br).…”

supporting

confidence: 67%

.pi.- and .sigma.-Acetoxy radicals

Skell¹,

May²

1981

J. Am. Chem. Soc.

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supporting

confidence: 67%

.pi.- and .sigma.-Acetoxy radicals

Skell¹,

May²

1981

J. Am. Chem. Soc.

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“…11 A variety of artificial host-guest assemblies has been planned to comprehend molecular recognition systems with new properties and functions. Recognition of various aqueous guest molecules, such as nucleic acids, their bases, nucleosides, and nucleotides, [12][13][14][15] barbituric acid and related derivatives, [16][17][18][19] amino acids, saccharides, [20][21][22][23][24][25][26] etc., 27,28 as well as chiral recognition within membrane components [29][30][31][32][33] and/or between amphiphile and aqueous guests [34][35][36][37][38][39][40][41] at the air/water interface have been studied.…”

Section: Introductionmentioning

confidence: 99%

Nanoaggregate shapes at the air/water interface

Vollhardt

Nandi

Banik

2011

Phys. Chem. Chem. Phys.

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Chiral interfaces and molecular recognition phenomena are of special interest not only for the understanding of biological recognition processes but also for the potential application in material science. Langmuir monolayers at the air-water interface have successfully been used as simple models to mimic biological phenomena. Recent experimental studies revealed that both chirality and molecular recognition processes of amphiphiles are controlling the features of the nano-aggregates at the air/water interface. The objective of experimental studies has been to gain information about the properties of mesoscopic length scale aggregates obtained on the basis of chiral discrimation effects and the formation of supramolecular entities by molecular recognition of non-surface active species dissolved in the aqueous subphase. Differences in the two-dimensional morphology and lattice structures of the nano-aggregates cannot be explained by macroscopic theories and needed information about the detailed orientation and distance dependence of the intermolecular interaction within the aggregates. First new bottom-up studies have been directed toward understanding the driving forces for the aggregation processes of monolayers. Different types of interactions have been successfully considered using semi-empirical quantum chemical methods. The possibilities of Langmuir-Blodgett (LB) patterning to be an alternative paradigm for large-area patterning with mesostructured features are discussed.

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“…The air-water interface has been also used for chiral recognition within membrane components [695][696][697][698][699][700] and/or between amphiphile and aqueous guests [701][702][703][704][705][706][707][708]. Mechanical control of chiral recognition was recently achieved using the novel concept of molecular twisting, as shown in figure 79A, where an octacoordinate sodium complex of a polycholesteryl-substituted cyclen embedded at the air-water interface was used as a molecular host [709].…”

Section: Langmuir-blodgett Filmsmentioning

confidence: 99%

Challenges and breakthroughs in recent research on self-assembly

Ariga

Hill

Lee

et al. 2008

Science and Technology of Advanced Materials

734

410

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The controlled fabrication of nanometer-scale objects is without doubt one of the central issues in current science and technology. However, existing fabrication techniques suffer from several disadvantages including size-restrictions and a general paucity of applicable materials. Because of this, the development of alternative approaches based on supramolecular self-assembly processes is anticipated as a breakthrough methodology. This review article aims to comprehensively summarize the salient aspects of self-assembly through the introduction of the recent challenges and breakthroughs in three categories: (i) types of self-assembly in bulk media; (ii) types of components for self-assembly in bulk media; and (iii) self-assembly at interfaces.

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Chiral aggregation phenomena. 1. Acid dependent chiral recognition in a monolayer

Cited by 15 publications

References 1 publication

.pi.- and .sigma.-Acetoxy radicals

.pi.- and .sigma.-Acetoxy radicals

Nanoaggregate shapes at the air/water interface

Challenges and breakthroughs in recent research on self-assembly

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