A srikaya-like light-harvesting antenna based on graphene quantum dots and porphyrin unimolecular micelles

Abstract

A novel hybrid light-harvesting antenna with a srikaya-like structure of multi-graphene quantum dots (GQDs) as donors and one porphyrin unimolecular micelle as the acceptor was constructed through electrostatic self-assembly. The constructed antenna showed a high energy transfer efficiency of up to 93.6% and an antenna effect of 7.3 in an aqueous solution.

Graphene quantum dot-porphyrin/phthalocyanine multifunctional hybrid systems: from interfacial dialogue to application

“…26,101 Interestingly, GQDs are superior to get engineered at bio-interfaces. Besides being dimensionally wise compatible with the redox active sites within tunneling distance of cofactors, they considerably decrease the oxygen adsorption and the electron transfer barrier, 23 providing enhanced electron transfer, electronic conduction abilities, and electrocatalytic activity for the redox reaction (ORR) due to the increased contribution of electro-catalytically active edge sites. 15,36,102,103 Some of these properties have spurred a wide range of potential applications 104 of GQDs in photodetectors, fluorescent agents, 73,91 solar cells, bioimaging, 91 sensors, 105 batteries, light-emitting diodes (LEDs), electro-/photo-catalysis, drug delivery, 106 etc.…”

“…Accordingly, Liu et al reported novel aqueous LHAs with the srikaya-like structure of multiple GQDs as donors and a single porphyrin unimolecular micelle as an acceptor. This construct overcame the problems related to the insolubility of porphyrin, minimized the electron transfer, and maximized the energy transfer efficacy from the GQD donor to the porphyrin acceptor by up to 93.6% with an antenna effect of 7.3 in aqueous solution 233 (Fig. 7a).…”

“…6,18 Differentcarbon nanomaterials 19 elegantly integrated within the tetrapyrrole ligand are crucial for accomplishing various vital processes by constructing conjugates. [20][21][22][23][24] The analysis of new forms of carbon 25,26 has transmuted the horizon of nanostructures and opened new avenues for exploration. 10,27,28 In the graphene family, GQDs with a unique structure have become the focus owing to their huge potential in a variety of applications.…”

An Investigation on the Effect of Extended Conjugation on the Photophysical Properties of Graphene Quantum Dot‐Porphyrin Dyads

“…[2,12] Such type of carbon based nanosystems have demands in the field of photodynamic therapy, [13] photocatalysis [14] and in light harvesting. [15,16] Among these GQD based systems have been less studied, in spite of their highly commendable and tunable photophysical properties of GQD on par with other carbon nanomaterials and low cost of production. In 2018 Gao et al have studied on the disparate combination modes of three types of GQDs-porphyrin composites.…”

Exclusive occurrence of photoinduced energy transfer and switching of its direction by rectangular π-extension of nanographenes

“…Nanocomposites of porphyrins with 2D nanocarbons such as graphenes, GOs, CCGs, and GQDs have been synthesized because of their potential applications in photoelectrochemical devices, photocatalysts, photodynamic and photothermal therapies, and biosensors 18–21. To achieve synergistic effects of the combinations of porphyrins and 2D nanocarbons on their performances in the applications, the occurrence of efficient photoinduced energy transfer (EnT) or electron transfer (ET) from the attached porphyrins to the 2D nanocarbons or vice versa is of extreme importance.…”