Ping‐Pong Energy Transfer in Covalently Linked Porphyrin‐MoS₂ Architectures

Abstract

Molybdenum disulfide nanosheets covalently modified with porphyrin were prepared and fully characterized. Neither the porphyrin absorption nor its fluorescence was notably affected by covalent linkage to MoS2. The use of transient absorption spectroscopy showed that a complex ping‐pong energy‐transfer mechanism, namely from the porphyrin to MoS2 and back to the porphyrin, operated. This study reveals the potential of transition‐metal dichalcogenides in photosensitization processes.

Unveiling the Photoinduced Electron‐Donating Character of MoS2 in Covalently Linked Hybrids Featuring Perylenediimide

“…Therefore,custom-synthesis enables PDIs to excel in plethora of cutting-edge technological applications,s uch as organic transistors, [12] photovoltaics [13] and photonics. [14] Based on our previously reported series of covalently functionalized MoS 2 with organic photoactive species,d ifferent photophysical response has been registered for the various MoS 2 based materials.N amely,t he MoS 2 entity may act as electron and/or energy acceptor, [15] energy reflector [16] or bi-directional electron acceptor, [17] based on the nature of its photoactive counterpart. Furthermore,t here is as carce literature report on aM oS 2 /PDI interfacial dipole heterosystem, formed by non-covalent interactions between the two entities lacking significant insight into MoS 2 charge transfer properties.…”

Pyrene-functionalized tungsten disulfide as stable resistive photosensor

“…Precisely, 1,2-dithiolanes efficiently bind at the edges of WS 2 layers, where sulfur vacant sites are numerous in comparison with those in the basal plane. A similar methodology has also been employed to directly incorporate pyrene, 14 carbon nanodots, 15 phthalocyanine 16 and porphyrin 17 species onto TMDs via robust and stable bond formation. The resulting electron donor-acceptor hybrid systems are important in electrocatalytic processes and photoinduced charge-transfer phenomena.…”

Unveiling the Photoinduced Electron‐Donating Character of MoS2 in Covalently Linked Hybrids Featuring Perylenediimide

“…Next, reaction between the two species in N,Ndimethylformamide (DMF) furnished MoS 2 -PDI hybrid material 3 (Scheme 1), in which S-vacancies at the periphery of MoS 2 are occupied by the Satoms of the ring as part of PDI derivative. [3,[15][16][17] After completion of the reaction, total removal of excess 2,f rom the powder residue obtained, was secured by filtration over PTFE membrane filter (0.2 mmpore size) and extensive washing with dichloromethane,a se videnced upon blank absorbance of the filtrate ( Figure S7).…”

“…Therefore,custom-synthesis enables PDIs to excel in plethora of cutting-edge technological applications,s uch as organic transistors, [12] photovoltaics [13] and photonics. [14] Based on our previously reported series of covalently functionalized MoS 2 with organic photoactive species,d ifferent photophysical response has been registered for the various MoS 2 based materials.N amely,t he MoS 2 entity may act as electron and/or energy acceptor, [15] energy reflector [16] or bi-directional electron acceptor, [17] based on the nature of its photoactive counterpart. Furthermore,t here is as carce literature report on aM oS 2 /PDI interfacial dipole heterosystem, formed by non-covalent interactions between the two entities lacking significant insight into MoS 2 charge transfer properties.…”