4 research outputs found
Porphyrin-Based MOF Thin Film on Transparent Conducting Oxide: Investigation of Growth, Porosity and Photoelectrochemical Properties
[EN] Synthesizing metal-organic frameworks (MOFs) composites with a controlled morphology is an important requirement to access materials of desired patterning and composition. Since the last decade, MOF growth from sacrificial metal oxide layer is increasingly developed as it represents an efficient pathway to functionalize a large number of substrates. In this study, porphyrin-based Al-PMOF thin films were grown on conductive transparent oxide substrates from sacrificial layers of ALD-deposited alumina oxide. The control of the solvent composition and the number of atomic layer deposition (ALD) cycles allow us to tune the crystallinity, morphology and thickness of the produced thin films. Photophysical studies evidence that Al-PMOF thin films present light absorption and emission properties governed by the porphyrinic linker, without any quenching upon increasing the film thickness. Al-PMOF thin films obtained through this methodology present a remarkably high optical quality both in terms of transparency and coverage. The porosity of the samples is demonstrated by ellipsometry and used for Zn(II) insertion inside the MOF thin film. The multifunctional transparent, porous and luminescent thin film grown on fluorine-doped tin oxide (FTO) is used as an electrode capable of photoinduced charge separation upon simulated sunlight irradiation.This research was funded by the French National Research Agency grant (ANR-17-CE09-
0029-01 and ANR-10-LABX-0064), and the Region Auvergne Rhone Alpes for the Subvention SCUSI.
The authors thank the French Ministry of National Education, Research and Technology, the University Lyon 1 and the CNRS for financial support. S.N. thanks the support of grant PID2021-123856OBI00 funded by MCIN/AEI/10.13039/501100011033 and by ERDF A way of making Europe.Gikonyo, B.; Liu, F.; Hawila, S.; Demessence, A.; Garcia-Baldovi, H.; Navalón Oltra, S.; Marichy, C.... (2023). Porphyrin-Based MOF Thin Film on Transparent Conducting Oxide: Investigation of Growth, Porosity and Photoelectrochemical Properties. Molecules. 28(15). https://doi.org/10.3390/molecules28155876281
A chiral 3D silver( i )–benzenedithiolate coordination polymer exhibiting photoemission and non-linear optical response
International audienceA new tridimensional metal-organic chalcogenolate, made of a 1,3-benzenedithiolate bridging ligand and Ag(i), [Ag-2(1,3-BDT)](n), is reported. This coordination polymer has good thermal stability in air and displays both photoluminescence properties and a second harmonic generation response
Luminescent and sustainable d10 coinage metal thiolate coordination polymers for high-temperature optical sensing
International audienceThe d10 coinage metal coordination polymers (CPs) are known to display photophysical properties which can be tuned depending on the functionality of the ligand. Three new CPs made of d10 coinage metals and methyl thiosalicylate, [M(o-SPhCO2Me)]n (M = Cu, Ag, Au), are reported. They are all constructed from one-dimensional metal-sulfur networks, in which Cu and Ag are three-coordinated to sulfur atoms, whereas Au is only two-coordinated. It results that both Cu(I) and Ag(I) CPs show orange photoemission at room temperature, and the Au(I) one exhibits near-infrared emission at low temperatures. The intense orange-emissive Ag(I) CP and the blue-emissive coumarin 120 have been mixed in an organic matrix, the polyvinylidene fluoride (PVDF), to form a dual luminescent flexible composite film. This film, evaluated for thermometry, shows great sensitivity for temperatures up to 100°C, a temperature never reached with non-lanthanide-based CPs
A p-type semi-conducting copper( i )-1,3-benzenedithiolate 2D coordination polymer with high Seebeck coefficient
International audienceA p-type semi-conducting and 2D coordination polymer, made of 1D copper( i )–sulfur inorganic networks, exhibits very high Seebeck coefficient for thermoelectricity