G‐Quartet‐Based Nanostructure for Mimicking Light‐Harvesting Antenna

Abstract

Artificial light-harvesting systems have received great attention for use in photosynthetic and optoelectronic devices. Herein, a system involving G-quartet-based hierarchical nanofibers generated from the self-assembly of guanosine 5'-monophosphate (GMP) and a two-step Förster resonance energy transfer (FRET) is presented that mimics natural light-harvesting antenna. This solid-state property offers advantages for future device fabrication. The generation of photocurrent under visible light shows it has potential for use as a nanoscale photoelectric device. The work will be beneficial for the development of light-harvesting systems by the self-assembly of supramolecular nanostructures.

FRET efficiency and antenna effect in multi-color DNA origami-based light harvesting systems

“…The AE resembles the acceptor emission generated by neighboring donors (sensitized emission) relative to the acceptor emission upon direct excitation. 6,8,10,16,[37][38][39] The overall antenna effect (AE1, FAM-Cy3-Cy5-FRET) is calculated using the following eqn (1).…”

Targeting G-quadruplex structures with extrinsic fluorogenic dyes: promising fluorescence sensors

“…The addition of Sr 2+ ions to a mixture of GMP and the dyes results in the formation of G-tetrad structures, which gradually grow into long nanofibers. 18 The three dyes are confined simultaneously in the nanofibers and brought into proximity, thus allowing for a twostep FRET from 1 to PY mediated by 2. However, similar FRET measurements between the three dyes in the presence of a G-quadruplex DNA structure was not as efficient as the G-tetrad, probably due to the loop structure and topological differences.…”

“…These G-tetrad nanofibers showed light-harvesting properties both in solution and in the solid state, thus offering an advantage from the viewpoint of device processing. 18 The photocurrent response as a function of time of GMP/Sr nanofibers containing different dyes in solution upon irradiation with visible light has been demonstrated. The generation of photocurrent in the visible light, which provides the material with the potential for application as a nanoscale photoelectric device.…”

Light‐Harvesting Fluorescent Supramolecular Block Copolymers Based on Cyanostilbene Derivatives and Cucurbit[8]urils in Aqueous Solution

“…In nature, photosynthesis is an essential element from which plants and other organisms attain life‐sustaining energy while contributing to keep the terrestrial environment suitable for other living things to survive . Inspired by nature, many scientists have paid attention to develop artificial light‐harvesting systems which have fostered remarkable developments in optoelectronic and photonic materials and devices such as photocatalysis, solar cells, optical sensors, and luminescent materials . A challenge in this field in the past decades was to develop artificial hierarchical organization of chromophores using noncovalent supramolecular interactions between energy donors (D) and acceptors (A) .…”