Post-doctoral position (M/F) to study the EPR/time-resolved spectroscopy of diarylethene-functionalized polyoxometallates.

27 Feb 2024
Job Information

Organisation/Company

CNRS

Department

Laboratoire Avancé de Spectroscopie pour les Interactions, la Réactivité et l'Environnement

Research Field

Chemistry » Physical chemistry
Chemistry » Computational chemistry

Researcher Profile

Recognised Researcher (R2)

Country

France

Application Deadline

18 Mar 2024 - 23:59 (UTC)

Type of Contract

Temporary

Job Status

Full-time

Hours Per Week

35

Offer Starting Date

29 Apr 2024

Is the job funded through the EU Research Framework Programme?

Not funded by an EU programme

Is the Job related to staff position within a Research Infrastructure?

No

Offer Description

Diarylethenes (DAEs) are very well known for their robust photochromic properties, which include excellent fatigue resistance, thermal reversibility, and high quantum yield. The integration of diarylethenes into molecular cages has revealed unique features like photoresponsive encapsulation and efficient energy transfer. Polyoxometalates (POMs), primarily composed of early transition metals, are distinguished by their diverse structural forms and catalytic prowess, especially in redox reactions. Ritchie et al. have made a significant breakthrough by developing the first POM-DAE molecular cage. This cage contains multiple DAE ligands that undergo sequential electrocyclization post-illumination, confirmed via transient absorption and NMR spectroscopy. The transient absorption studies further disclosed additional photoproducts during the illumination process. These include a charge-separated electron-hole pair of DAE+• and POM- with a lifespan exceeding 200 µ-seconds. This finding suggests that POM-DAE combinations could open new avenues in photocatalytic applications by leveraging these long-lived charge-separated states.

This project will explore detailed photo physics of more such POM-DAE systems along with transient absorption and EPR spectroscopy at Laboratory LASIRe CNRS, France, and in collaboration with Chris Ritchie, Monash University.

EPR spectroscopy will be crucial for understanding the radical intermediates in POM-DAE systems during photochromic reactions. These combined techniques promise to elucidate the complex interactions within the POM-DAE system, shedding light on their potential applications in various fields, including energy conversion and catalysis.

SAMPLE PREPARATION UNDER INERT ATMOSPHERE
POM synthesis
EPR CAMPAINS
TRANSIENT ABSORPTION SPECTROSCOPIES CAMPAINS
DATA TREATMENT

The post-doc is a transversal action in the LASIRE laboratory between the two teams.
The experiment will be launched at C4 (EPR) and C8 (Bâtiment).
All chemical preparations will take place in a newly renovated laboratory.
For transient spectroscopy, the researcher will be supported by the research engineer.

Requirements

Research Field

Chemistry

Education Level

PhD or equivalent

Research Field

Chemistry

Education Level

PhD or equivalent

Languages

FRENCH

Level

Basic

Research Field

Chemistry » Physical chemistry

Years of Research Experience

1 - 4

Research Field

Chemistry » Computational chemistry

Years of Research Experience

1 - 4

Additional Information
Eligibility criteria

POM chemistry and/or Diarylethene chemistry
EPR
TRANSIENT SPECTRSOCOPY

Additional comments

-

Website for additional job details

https://emploi.cnrs.fr/Offres/CDD/UMR8516-STEALO-001/Default.aspx

Work Location(s)

Number of offers available

1

Company/Institute

Laboratoire Avancé de Spectroscopie pour les Interactions, la Réactivité et l'Environnement

Country

France

City

VILLENEUVE D ASCQ

Geofield

Where to apply

Website

https://emploi.cnrs.fr/Candidat/Offre/UMR8516-STEALO-001/Candidater.aspx

Contact

City

VILLENEUVE D ASCQ

Website

http://lasir.cnrs.fr

STATUS: EXPIRED