• No results found

University of Groningen Dynamic transfer of chirality in photoresponsive systems Pizzolato, Stefano Fabrizio

N/A
N/A
Protected

Academic year: 2021

Share "University of Groningen Dynamic transfer of chirality in photoresponsive systems Pizzolato, Stefano Fabrizio"

Copied!
3
0
0

Bezig met laden.... (Bekijk nu de volledige tekst)

Hele tekst

(1)

University of Groningen

Dynamic transfer of chirality in photoresponsive systems

Pizzolato, Stefano Fabrizio

IMPORTANT NOTE: You are advised to consult the publisher's version (publisher's PDF) if you wish to cite from it. Please check the document version below.

Document Version

Publisher's PDF, also known as Version of record

Publication date: 2017

Link to publication in University of Groningen/UMCG research database

Citation for published version (APA):

Pizzolato, S. F. (2017). Dynamic transfer of chirality in photoresponsive systems: Applications of molecular photoswitches in catalysis. University of Groningen.

Copyright

Other than for strictly personal use, it is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license (like Creative Commons).

Take-down policy

If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.

Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum.

(2)

305

Abbreviations and Acronyms

APCI atmospheric pressure chemical ionization BINAM 1,1′-Bi(2-naphthylamine)

BINOL 1,1′-Bi(2-naphthol)

BIPHEP 2,2‘-bis(diarylphosphino)biphenyl

CD Circular Dichroism

CIP Cahn-Ingold-Prelog CLA chiral Lewis acid

cod 1,5-cyclooctadiene

Conv conversion

COSY NMR correlation spectroscopy CSP chiral stationary phase

DABCO 1,4-diazabicyclo[2.2.2]octane

DBS dibenzosuberane

DFT density functional theory

DHPLC Dynamic HPLC

DMA N,N’-dimethylaniline

DMI N,N’-dimethylimidazolinone

DMRG density matrix renormalization group dr diastereoisomeric ratio

(E) entgegen, denotes relative configuration

ee enantiomeric excess

er enantiomeric ratio

EDG electron donating group

EI electron ionization

ESI electrospray ionization EXSY NMR exchange spectroscopy EWG electron withdrawing group

GC gas chromatography

GC-MS gas chromatography-mass spectrometry HOMO highest occupied molecular orbital HPLC high performance liquid chromatography HRMS high resolution mass spectrometry

IR infra-red

LUMO lowest unoccupied molecular orbital (M) denotes left-handed helicity

(Ma) denotes left-handed axial helicity

(M=) denotes left-handed overcrowded alkene helicity

MAP N-methylaminopyridine

MBH Morita–Baylis–Hillman

MS or M metastable

NMR nuclear magnetic resonance

NOESY nuclear Overhauser effect spectroscopy (P) denotes right-handed helicity

(Pa) denotes right-handed axial helicity

(P=) denotes right-handed overcrowded alkene helicity

PET photoinduced electron transfer PSS photostationary state

(3)

Abbreviations and Acronyms

306

(R) rectus, denotes absolute configuration

(Ra) rectus, denotes absolute axial configuration

(RP) rectus, denotes absolute configuration of phosphorus center

RC rotaxane catalyst

RCL responsive coordination ligand ROC responsive organocatalyst

rt room temperature

(S) sinister, denotes absolute configuration

(Sa) sinister, denotes absolute axial configuration

(SP) sinister, denotes absolute configuration of phosphorus center

St or S stable

TD time-dependent

TEZI thermal E-Z isomerization TLC thin layer chromatography TOF turnover frequency THI thermal helix inversion UV-vis Ultraviolet-visible

Referenties

GERELATEERDE DOCUMENTEN

The work described in this thesis was carried out at the Zernike Institute for Advanced Materials and Stratingh Institute for Chemistry, in compliance with

In this system, a single chiral photochromic switch unit attached at the terminus of a helical polymer allows the reversible induction and inversion of the

HPLC chromatograms of the resulting samples showed a partial reversal of the metastable-(E) isomer to the initial, stable-(Z) isomer which is observed together with

The aqueous layer was then extracted into EtOAc (50 mL) and the organic extracts were washed with brine (50 mL), dried over MgSO 4 , filtered and concentrated

This feature would ensure a limited variation of the catalyst mixture composition (ratio of stable vs. metastable) throughout the entire catalytic reaction, open the application

are characterized by having the lower hydroxyl substituent pointing away from the central overcrowded alkene in a syn conformation with the upper phenol group.

14,15,18,35–37.. constructed and isomerized without disrupting the bridged biaryl unit or affecting its flexibility, nor obstructing the motion of the

intrinsic LCs properties, which might be due to the steric hindrance, the distinct isomers are still effective as chiral dopants in nematic LC materials. Overall, the