Tuning of 2D materials properties through controlled functionalization with opto-electroactive complexes

Información del proyecto

Terpy2DMat

Identificador del acuerdo de subvención: 706238

DOI

10.3030/706238

Proyecto cerrado

Fecha de la firma de la CE 3 Noviembre 2016

Fecha de inicio 1 Noviembre 2017

Fecha de finalización 3 Octubre 2020

Financiado con arreglo a

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Coste total

€ 170 121,60

Aportación de la UE

€ 170 121,60

Coordinado por

UNIVERSITAT DE VALENCIA
Spain

Periodic Reporting for period 1 - Terpy2DMat (Tuning of 2D materials properties through controlled functionalization with opto-electroactive complexes)

Período documentado: 2017-11-01 hasta 2019-10-31

Resumen del contexto y de los objetivos generales del proyecto

Two dimensional (2D) materials are a hot topic in chemistry, physics, materials science or even biology. However, proper functionalization of these ultrathin layers to tune their electronic charge and spin properties beyond current systems is still under development. In this scenario, Terpy2DMat pursued the tailoring of the electronic and optical properties of 2D transition metal dichalcogenides (TMDCs) through the anchoring of electroactive metal complexes. The specific goals of the project were:
1. Developing new protocols for functionalizing the exfoliated TMDCs surfaces with electroactive conjugated molecules
2. Full characterization of the hybrid structures by complementary techniques
3. Integration of the functionalized 2D materials into simple devices to prove their photo-electronic properties and potential technological applications
To reach these goals we focused on the electrostatic functionalization of MoS2 layers (the most representative TMDC) with metallo-terpyridyl complexes.

Trabajo realizado desde el comienzo del proyecto hasta el final del período abarcado por el informe y los principales resultados hasta la fecha

During the development of the project, electroactive metallic complexes based on terpyridyl ligand (4’-aminophenyl terpyridyl, TPY) have been synthetized. These complexes can be protonated at optimum pH values. Thanks to this property it is possible to functionalize the negatively charged MoS2 ultrathin layers with the TPY complexes. Thus, the formation of the new hybrid material is driven by soft electrostatic forces and the integrity of the components is not compromised. Interestingly, it has been observed that there is a nearly vertical alignment of metallo-terpyridyl complexes on the MoS2 layers. Finally, thanks to the preparation of simple devices, it has been possible to measure optoelectronic properties in solid state and it has been observed that photo-current measurements depend on the nature of the coordinated cation in the metallo-terpyridyl complexes.

Avances que van más allá del estado de la técnica e impacto potencial esperado (incluida la repercusión socioeconómica y las implicaciones sociales más amplias del proyecto hasta la fecha)

The work done in this project can have a significant impact on the domain of two-dimensional transition metal dichalcogenides (2D-TMDCs). We have optimized a process by which one can easily functionalize and modulate opto-electronic properties of chemically exfoliated MoS2 without affecting the MoS2 nor the molecular unit structures. The hybrid structures consisting of MoS2 and redox-active, photo-responsive molecules offer many advantages in designing opto-electronic devices.

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