Porphyrin Antennas on Carbon Nanodots: Excited State Energy and Electron Transduction

Arcudi, Francesca; Strauß, Volker; Đorđević, Luka; Cadranel, Alejandro; Guldi, Dirk M.; Prato, Maurizio

doi:10.1002/ange.201704544

Cited by 27 publications

(21 citation statements)

References 54 publications

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“…In order to investigate if it is possible to transfer the chiral information from the CNDs- S and CNDs- R to other molecules, we probed their non-covalent interactions with porphyrins, which are known to form donor-acceptor complexes with CNDs 40 , 41 . Porphyrins, square planar aromatic systems comprising 18 π electrons, are known for their structural robustness, absorption and emission properties and vast supramolecular chemistry.…”

Section: Resultsmentioning

confidence: 99%

Design principles of chiral carbon nanodots help convey chirality from molecular to nanoscale level

et al. 2018

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The chirality of (nano)structures is paramount in many phenomena, including biological processes, self-assembly, enantioselective reactions, and light or electron spin polarization. In the quest for new chiral materials, metallo-organic hybrids have been attractive candidates for exploiting the aforementioned scientific fields. Here, we show that chiral carbon nanoparticles, called carbon nanodots, can be readily prepared using hydrothermal microwave-assisted synthesis and easily purified. These particles, with a mean particle size around 3 nm, are highly soluble in water and display mirror-image profile both in the UV–Vis and in the infrared regions, as detected by electronic and vibrational circular dichroism, respectively. Finally, the nanoparticles are used as templates for the formation of chiral supramolecular porphyrin assemblies, showing that it is possible to use and transfer the chiral information. This simple (and effective) methodology opens up exciting opportunities for developing a variety of chiral composite materials and applications.

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Section: Resultsmentioning

confidence: 99%

Design principles of chiral carbon nanodots help convey chirality from molecular to nanoscale level

et al. 2018

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“…Notably, depending on the precursors employed for the synthesis, the periphery of the surface of CNDs can be decorated with diverse functional units, which can serve as anchors to conjugate other species en route the preparation of functional hybrid nanomaterials. For example, CNDs have been covalently conjugated with carbon nanotubes, 11 porphyrins 12 and extended tetrathiafulvalene (exTTF) 13 and found to participate in photoinduced charge-transfer processes. Among the marked characteristics of CNDs are the broad and tunable absorption in the visible region and the intrinsic photoluminescence, 14 while interestingly, CNDs can act as either electron donors or acceptors, owed to their bivalent redox character.…”

Section: Introductionmentioning

confidence: 99%

“…15 This is to say that upon photoirradiation, CNDs donate electrons when assembled with carbon nanotubes or perylenediimides, 11,16,17 and accept electrons upon interaction with porphyrins and exTTF. 12,13,18 Conversely, the fascination of transition metal dichalcogenides (TMDs) for energy-related applications, [19][20][21][22] attributed to their astounding optoelectronic properties and high electrical conductivity 23 has become progressively apparent. Molybdenum disulfide MoS2 and tungsten disulfide WS2, as the most fascinated and examined TMDs, consist of an atomic thick layer of transition metals sandwiched by two atomic layers of sulfur atoms.…”

Section: Introductionmentioning

confidence: 99%

Interfacing Transition Metal Dichalcogenides with Carbon Nanodots for Managing Photoinduced Energy and Charge-Transfer Processes

et al. 2018

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Exfoliated semiconducting MoS and WS were covalently functionalized with 1,2-dithiolane-modified carbon nanodots (CNDs). The newly synthesized CND-MoS and CND-WS hybrids were characterized by spectroscopic, thermal, and electron microscopy imaging methods. Based on electronic absorption and fluorescence emission spectroscopy, modulation of the optoelectronic properties of TMDs by interfacing with CNDs was accomplished. Electrochemical studies revealed facile oxidation of MoS over WS in the examined hybrids, suggesting it to be better electron donor. Excited state events, investigated by femtosecond transient absorption spectroscopic studies, revealed ultrafast energy transfer from photoexcited CNDs to both MoS and WS. Interestingly, upon MoS photoexcitation, charge transfer from an exciton dissociation path of MoS to CNDs, within CND-MoS, was observed. However, such a process in CND-WS was found to be absent due to energetic reasons. The present study highlights the importance of TMD-derived donor-acceptor hybrids in light energy harvesting and optoelectronic applications. Furthermore, the fundamental information obtained from the current results will benefit design strategies and impact the development of additional TMD-based hybrid materials to efficiently manage and perform in electron-transfer processes.

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“…In contrast to other nano carbons, CDs feature a high intrinsic photo‐luminescence and superior photochemical property . Thus, the observed photoluminescence response is not a unique mechanism but a combination of at least two mechanisms from different sources.…”

Section: Introductionmentioning

confidence: 96%

Application of carbon dots in dye‐sensitized solar cells: A review

Gao

Huang

et al. 2019

J of Applied Polymer Sci

106

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Carbon dots (CDs) are a kind of zero-dimensional carbon-based nanoparticles with superb light-trapping ability, high optical absorption ability, and superior intrinsic catalytic activity. Due to these advantageous properties, they have received enthusiastic attention from researchers in the field of optical devices. The application of carbon dots in dye-sensitized solar cells has increased with steady steps recently, especially as a substitute for precious Ru-sensitizers and Pt counter electrodes. In this review, we classified the application of carbon dots in dye-sensitized solar cells in recent years and explained the mechanisms of improving the performance of carbon dots. The significant impact of surface functionalization of CDs on the performance of dye-sensitized solar cells was discussed. Lastly, some challenges and application prospects of carbon dots in the dye-sensitized solar cell were proposed, which is meaningful for the further exploration and application of carbon dots as a new energy material.

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Porphyrin Antennas on Carbon Nanodots: Excited State Energy and Electron Transduction

Cited by 27 publications

References 54 publications

Design principles of chiral carbon nanodots help convey chirality from molecular to nanoscale level

Design principles of chiral carbon nanodots help convey chirality from molecular to nanoscale level

Interfacing Transition Metal Dichalcogenides with Carbon Nanodots for Managing Photoinduced Energy and Charge-Transfer Processes

Application of carbon dots in dye‐sensitized solar cells: A review

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