Self-Assembly of Solvent-Stabilized Au Nanocluster as Efficient Förster Resonance Energy-Transfer Initiator for White Light Generation

Abstract

Aggregation-induced enhancement (AIE) in the photoluminescence quantum yield (PLQY) from 12.5 to 51% in the N,Ndimethylformamide (DMF)-stabilized Au nanocluster (AuNC) system is reported here. The self-assembling of AuNC has been achieved via hydrogen bonding interaction, which is further utilized in designing the AuNC_DCM system for realizing a Forster resonance energy transfer (FRET)-based white LED (WLED), having CIE coordinates of (0.35, 0.29). The solution-processed fabrication strategy used, has given us the liberty to optimize its components for optimal full-spectrum light output. The CIE coordinates of the designed WLED have been improved further to (0.33, 0.32), with a high color rendering index of 93 and correlated color temperature of 5620 K by incorporating a green emitter, namely nitrogen-doped graphene quantum dots (NGQD), in the AuNC_DCM system. The excellent spectral quality of the as-designed WLED and the repeatability of the proposed fabrication method will make the developed AuNCs_DCM FRET conjugate useful in practical photonic applications.

Luminescent [CO2@Ag20(SAdm)10(CF3COO)10(DMA)2] nanocluster: synthetic strategy and its implication towards white light emission

“…The energy transfer rates of the first and second energy transfer processes calculated using eqn (S5)† are 6.33 × 10 8 s −1 and 2.21 × 10 9 s −1 , respectively. 40,44 Hence, the corresponding time scale of these energy transfer rates (1.57 ns and 0.45 ns) is quite predictable from the individual donor lifetime. Therefore, at a favorable position, the acceptor molecule has ample time to efficiently quench the excited state of the donor at every step.…”

Deciphering Dual Modes of Parkinsonian Biomolecules Derived Fluorescent Nanoparticles: Protein Specificity and White Light Generation

“…Now, all these WL emissive systems are two-component based luminescent systems, which provides an excellent optoelectronic response for the classic drug delivery application and also correlates with many recent important literature findings, which also focus on two or more component based WL emissive systems. 25,26 Furthermore, the molecular mechanism involved behind such WL generation has been supposed to be Forster based resonance energy transfer (FRET) 26,27 or a similar type of energy transfer, operating from the polymeric NPs (energy transfer donor) to the Dox center (energy transfer acceptor), and this has been spectroscopically established in Figure S9 and Table S9. The significantly small size of the synthesized NPs (Figure S2a) may allow the drug molecules to come in close contact with the NP surface after adsorption of protein, and as a consequence, energy transfer becomes favorable.…”

Solvent‐Induced Modulation in the Optical Properties of Copper Nanoclusters and Revealing the Isomeric Effect of Templates

“…Owing to the promising ability for multicolor tuning through the suitable metallic core and ligand engineering, atomically precise MNCs serve as an important class of materials to achieve high‐quality WLE. Various approaches are involved to generate WLE from MNCs, such as introducing various non‐covalent interactions like Förster Resonance Energy Transfer (FRET), [36] solvent‐induced assemblies of MNCs, [37] electrostatic interactions, [38] etc. as well as the combination of two or more fluorophores [39] .…”