MS35-P11 Sulfur polyconjugated organic ligands as bulding block in photoactive Metal-Organic Frameworks Alba García Sánchez (Photo Activated Processes Unit, IMDEA Energy, Móstoles, Spain) Marta Liras (Photo Activated Processes Unit, IMDEA Energy, Móstoles, Spain) Fernando Fresno (Photo Activated Processes Unit, IMDEA Energy, Móstoles, Spain) Mariam Barawi (Photo Activated Processes Unit, IMDEA Energy, Móstoles, Spain) Enrique Gutiérrez-Puebla (Instituto de Ciencia de Materiales de Madrid, CSIC, Madrid, Spain) Ángeles Monge (Instituto de Ciencia de Materiales de Madrid, CSIC, Madrid, Spain) Felipe Gándara (Instituto de Ciencia de Materiales de Madrid, CSIC, Madrid, Spain) Víctor A. de la Peña O´Shea (Photo Activated Processes Unit, IMDEA Energy, Móstoles, Spain)email: alba.garcia@imdea.orgMetal-organic frameworks or MOFs, are relative recent hybrid structures form by the joint between metal clusters and organic ligands. These networks have raised notable research interest because of their components are responsible for the structure properties resulting in a wide range of applications. Therefore, the appropriate choice of these building blocks could improve its features and direct the properties towards different applications like catalysis, gas separation and storage, magnetism, sensors, drug delivery [1].
Here we report the synthesis of photoactive MOFs with the combination of hole transport sulfur-conjugated ligands and different metals such as bismuth and indium. The use of electroactive organic ligands can provide charge transfer phenomena in these tridimensional networks and can leads to significant electronic interactions with the metal center-coordinated metal ions under light irradiation leading to an improvement of the optoelectronic and photo-catalytic properties [2]. In addition, a metal-node with relative large ionic radius with possibility of act with high oxidation state and empty orbitals to accept electron transfer is desired.
The opto-electronic and conductive properties of these networks have been determined by several characterization tools. Transient absorption spectroscopy reveals different electron-hole recombination rates compared with the corresponding metal oxides. Moreover, photocurrent measurements reveals changes in the conductivity in function of the used metal node.
In this way we have study the expected potential properties of these specifically tailored structures to their application into photocatalytic reactions.
 
References:

[1] Furukawa, H.; Cordova, K. E.; O´Keeffe, M. & Yaghi, O. M. (2013) Science, 341, 6149, 1230444

[2] Diercks, C. S.; Liu, Y.; Cordova, K. E. & Yaghi. O.M. (2018) Nature Materials 17, 301-301.

Keywords: Metal-organic frameworks, conjugated ligands, charge transfer