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INSPIRAL SIGNED

Spin-Delocalization with a Twist: Chiral Open-Shell Helices

Total Cost €

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EC-Contrib. €

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Partnership

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 INSPIRAL project word cloud

Explore the words cloud of the INSPIRAL project. It provides you a very rough idea of what is the project "INSPIRAL" about.

material    units    atoms    molecule    tuned    crystallization    unexpectedly    simultaneously    conductors    display    single    pancake    intermolecular    degree    electrons    optical    architectures    govern    spiral    phenomenon    overlap    difficult    model    synthesize    ferromagnetic    designing    additionally    radical    enantiopure    couples    spin    strength    inspired    containing    mode    electronic    tuning    helices    oriented    chiral    arise    racemic    multiple    assembly    fundamental    interactions    provides    understand    bond    governs    coupling    character    abets    assemblies    gives    batteries    spins    unusual    interplay    helical    tune    phenalenyl    delocalization    dictates    distance    molecular    versus    bulk    solid    backbone    molecules    bonding    varying    made    tailor    magneto    space    principles    pairs    antiferromagnetic    unpaired    materials    named    communicate    bistable    intramolecular    interaction    shell    spontaneous   

Project "INSPIRAL" data sheet

The following table provides information about the project.

Coordinator
UNIVERSITAT ZURICH 

Organization address
address: RAMISTRASSE 71
city: Zürich
postcode: 8006
website: http://www.unizh.ch

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Switzerland [CH]
 Total cost 1˙499˙925 €
 EC max contribution 1˙499˙925 € (100%)
 Programme 1. H2020-EU.1.1. (EXCELLENT SCIENCE - European Research Council (ERC))
 Code Call ERC-2016-STG
 Funding Scheme ERC-STG
 Starting year 2017
 Duration (year-month-day) from 2017-04-01   to  2022-03-31

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    UNIVERSITAT ZURICH CH (Zürich) coordinator 1˙499˙925.00
2    UNIVERSITAT BASEL CH (BASEL) participant 0.00

Map

 Project objective

Spin-delocalization in molecules containing unpaired electrons gives rise to an unusual intermolecular interaction, named as pancake bond. This bonding interaction couples unpaired electrons between multiple pairs of atoms from each face-to-face oriented spin units, such as phenalenyl radical, and abets formation of assemblies that display large antiferromagnetic interaction in the solid state. This phenomenon governs the potential use of such spin systems as molecular conductors, magneto-optical bistable materials, or molecular spin batteries. Formation of such assemblies during crystallization is spontaneous. It is therefore difficult to control and tune the antiferromagnetic interaction, which dictates the electronic properties of the solid material. Inspired by this challenge, the goal of this project is to develop systems, where the spin-interaction can be tuned within a single molecule to understand principles that govern an intermolecular assembly in the solid state and the bulk properties.

To achieve this goal, I propose to synthesize and study chiral open-shell helices, in which the intramolecular spin-interaction can be tuned by varying (1) the coupling mode, ferromagnetic versus antiferromagnetic, and (2) its strength. The helical character of these systems enables tuning of the coupling strength by control of the degree of overlap and distance between the spin units, which is difficult to achieve by a spontaneous assembly. Additionally, it provides access to both racemic and enantiopure solid-state architectures that can further impact the properties. Two model systems will be investigated: one in which spins communicate simultaneously through backbone and space, and one where spins communicate only through space. Understanding the principles of spin-interactions in these helical systems is of fundamental interest for designing molecules with tailor-made properties, as well as features that arise unexpectedly from the interplay of the spins in a spiral.

 Publications

year authors and title journal last update
List of publications.
2019 Peter Ribar, Tomáš Šolomek, Michal Juríček
Gram-Scale Synthesis and Supramolecular Complex of Precursors of Clar’s Hydrocarbon Triangulene
published pages: 7124-7128, ISSN: 1523-7060, DOI: 10.1021/acs.orglett.9b02683
Organic Letters 21/17 2019-12-16
2019 Daniel Čavlović, Michal Juríček
Molecular Magnetic Switches
published pages: 313-316, ISSN: 0009-4293, DOI: 10.2533/chimia.2019.313
CHIMIA International Journal for Chemistry 73/4 2019-12-16
2019 Prince Ravat, Olivier Blacque, Michal Juríček
Benzo[ cd ]triangulene: A Spin 1/2 Graphene Fragment
published pages: , ISSN: 0022-3263, DOI: 10.1021/acs.joc.9b02163
The Journal of Organic Chemistry 2019-12-16
2019 Prince Ravat, Tomáš Šolomek, Michal Juríček
Helicenes as Chiroptical Photoswitches
published pages: 180-186, ISSN: 2367-0932, DOI: 10.1002/cptc.201800229
ChemPhotoChem 3/4 2019-12-16
2018 Tomáš Šolomek, Prince Ravat, Zhongyu Mou, Miklos Kertesz, Michal Juríček
Cethrene: The Chameleon of Woodward–Hoffmann Rules
published pages: 4769-4774, ISSN: 0022-3263, DOI: 10.1021/acs.joc.8b00656
The Journal of Organic Chemistry 83/8 2019-04-18
2018 Prince Ravat, Tomáš Šolomek, Daniel Häussinger, Olivier Blacque, Michal Juríček
Dimethylcethrene: A Chiroptical Diradicaloid Photoswitch
published pages: 10839-10847, ISSN: 0002-7863, DOI: 10.1021/jacs.8b05465
Journal of the American Chemical Society 140/34 2019-04-18
2018 Michal Juríček
The Three C\'s of Cethrene
published pages: 322-327, ISSN: 0009-4293, DOI: 10.2533/chimia.2018.322
CHIMIA International Journal for Chemistry 72/5 2019-04-18
2017 Ravat, Prince; Hinkelmann, Rahel; Steinebrunner, David; Prescimone, Alessandro; Bodoky, Ina; Juricek, Michal
Configurational Stability of [5]Helicenes
published pages: 3707-3710, ISSN: 1523-7052, DOI: 10.5167/uzh-139463
Organic Letters 19/14 2019-04-18

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