1) La descarga del recurso depende de la página de origen
2) Para poder descargar el recurso, es necesario ser usuario registrado en Universia


Opción 1: Descargar recurso

Opción 2: Descargar recurso

Detalles del recurso

Descripción

When two planes stacked one above the other are twisted, they provide a dynamic pair of helical conformations with (M)- or (P)-helicity. We designed a three-layer cyclophane that consists of two such dynamic pairs: the top and middle planes, and the middle and bottom planes. Hence, several global conformations could be created for the overall molecule, e.g., double-helical forms with a pair with the same helicity [(M, M) or (P, P)], and a meso-like form with a pair with a different helicity (M, P). These conformations dynamically interconvert to each other in solution. Chiroptical properties were given by the helical-sense preference of the double-helical forms, which was brought about through complexation with a chiral hydrogen-bonding guest. In terms of the conformational energy in a complexed state, when a desirable relationship between double-helical and meso-like forms was attained, complexation-induced circular dichroism was enhanced at elevated temperatures and decreased at lowered temperatures.

Pertenece a

Hokkaido University Collection of Scholarly and Academic Papers  

Autor(es)

Katoono, Ryo -  Obara, Yudai -  Fujiwara, Kenshu -  Suzuki, Takanori - 

Id.: 71383872

Idioma: inglés  - 

Versión: 1.0

Estado: Final

Palabras clave430 - 

Tipo de recurso: article  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

: https://creativecommons.org/licenses/by-nc/3.0/

Requerimientos técnicos:  Browser: Any - 

Fecha de contribución: 09-jun-2018

Contacto:

Localización:
* Chemical science, 9(8): 2222-2229

Otros recursos del mismo autor(es)

  1. 9,10-Dihydrophenanthrene with Two Spiro(dibenzocycloheptatriene) Units : A Highly Strained Caged Hydrocarbon Exhibiting Reversible Electrochromic Behavior The title dispiro hydrocarbon 1 was designed as a new electrochromic material. This multiply clamped...
  2. Dynamic helical cyclophanes with two quadruply-bridged planes arranged in an "obverse and/or reverse" relation We describe the design of two types of cyclophanes that generate dynamic helicity through the twisti...
  3. Planar chiral desymmetrization of a two-layered cyclophane and control of dynamic helicity through the arrangement of two nonstereogenic centers We designed a planar chiral two-layered cyclophane, which is inherently achiral but desymmetrized by...
  4. Controllability of dynamic double helices: quantitative analysis of the inversion of a screw-sense preference upon complexation We describe a quantitative analysis of the complexation-induced inversion of a screw-sense preferenc...
  5. A stereoselective method for the construction of the C8′–O–C6″ ether of nigricanoside-A: synthesis of simple models for the C20 lipid chain/galactosyl glycerol segment A method for the stereoselective construction of the C8′–O–C6″ ether of nigricanoside-A, an antimito...

Otros recursos de la mismacolección

  1. Enantiocontrol by assembled attractive interactions in copper-catalyzed asymmetric direct alkynylation of alpha-ketoesters with terminal alkynes: OH center dot center dot center dot O/sp(3)-CH center dot center dot center dot O two-point hydrogen bonding Copper-catalyzed asymmetric direct alkynylation of alpha-ketoesters with terminal alkynes with chira...
  2. Real-time imaging of actin filaments in the zebrafish oocyte and embryo Dynamic changes of cytoplasmic and cortical actin filaments drive various cellular and developmental...
  3. High-Sensitivity and High-Resolution In Situ Hybridization of Coding and Long Non-coding RNAs in Vertebrate Ovaries and Testes Background: Subcellular localization of coding and non-coding RNAs has emerged as major regulatory m...
  4. Characterization of a heat-activated retrotransposon in Vigna angularis In plants, several transposable elements are conserved across species. We found a homolog of ONSEN, ...
  5. Asymmetric Synthesis of beta-Lactams through Copper-Catalyzed Alkyne-Nitrone Coupling with a Prolinol-Phosphine Chiral Ligand Prolinol-phosphine chiral ligands enabled highly enantioselective copper-catalyzed intermolecular al...

Aviso de cookies: Usamos cookies propias y de terceros para mejorar nuestros servicios, para análisis estadístico y para mostrarle publicidad. Si continua navegando consideramos que acepta su uso en los términos establecidos en la Política de cookies.