Engineering Ligand–Metal Charge Transfer States in Cross-Linked Gold Nanoclusters for Greener Luminescent Solar Concentrators with Solid-State Quantum Yields Exceeding 50% and Low Reabsorption Losses

2018 ◽  
Vol 122 (34) ◽  
pp. 20019-20026 ◽  
Author(s):  
Hsiu-Ying Huang ◽  
Kun-Bin Cai ◽  
Po-Wen Chen ◽  
Cheng-An J. Lin ◽  
Sheng-Hsiung Chang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Solid State ◽  
Gold Nanoclusters ◽  
Quantum Yields ◽  
Solar Concentrators ◽  
Metal Charge ◽  
Luminescent Solar Concentrators ◽  
Metal Charge Transfer

Excited State Properties of Myochrysin and Auranofin

1996 ◽  
Vol 51 (8) ◽  
pp. 1067-1071 ◽  
Author(s):  
Horst Kunkely ◽  
Arnd Vogler
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Solid State ◽  
Sodium Aurothiomalate ◽  
Metal Charge ◽  
Metal Charge Transfer

Myochrysin (sodium aurothiomalate hydrate) and auranofin [2,3,4,6-tetra-O-acetyl-1-thio-β-D-glucopyranosato-S)(triethylphospine)gold(I)] are luminescent in the solid state and in ethanol glasses at 77 K (myochrysin: λmax = 600 nm; auranofin: 618 nm). Aqueous myochrysin and auranofin in acetonitrile undergo a photodecomposition. It is assumed that the luminecence originates from a metal-centered ds excited state with partial ligand-to-metal charge transfer (LMCT) character while the photodecomposition is induced by LMCT excitation.

scholarly journals The Emission Mechanism of Gold Nanoclusters Capped with 11-Mercaptoundecanoic Acid, and the Detection of Methanol in Adulterated Wine Model

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6342
Author(s):  
Ming Wei ◽  
Ye Tian ◽  
Lijun Wang ◽  
Yuankai Hong ◽  
Dan Luo ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Stokes Shift ◽  
Gold Nanoclusters ◽  
Absorption Peak ◽  
Suitable Model ◽  
Photoluminescence Excitation ◽  
Emission Mechanism ◽  
Metal Charge ◽  
Wine Models ◽  
Metal Charge Transfer

The absorption and emission mechanisms of gold nanoclusters (AuNCs) have yet to be understood. In this article, 11-Mercaptoundecanoic acid (MUA) capped AuNCs (AuNC@MUA) were synthesized using the chemical etching method. Compared with MUA, AuNC@MUA had three obvious absorption peaks at 280 nm, 360 nm, and 390 nm; its photoluminescence excitation (PLE) peak and photoluminescence (PL) peak were located at 285 nm and 600 nm, respectively. The AuNC@MUA was hardly emissive when 360 nm and 390 nm were chosen as excitation wavelengths. The extremely large stokes-shift (>300 nm), and the mismatch between the excitation peaks and absorption peaks of AuNC@MUA, make it a particularly suitable model for studying the emission mechanism. When the ligands were partially removed by a small amount of sodium hypochlorite (NaClO) solution, the absorption peak showed a remarkable rise at 288 nm and declines at 360 nm and 390 nm. These experimental results illustrated that the absorption peak at 288 nm was mainly from metal-to-metal charge transfer (MMCT), while the absorption peaks at 360 nm and 390 nm were mainly from ligand-to-metal charge transfer (LMCT). The PLE peak coincided with the former absorption peak, which implied that the emission of the AuNC@MUA was originally from MMCT. It was also interesting that the emission mechanism could be switched to LMCT from MMCT by decreasing the size of the nanoclusters using 16-mercaptohexadecanoic acid (MHA), which possesses a stronger etching ability. Moreover, due to the different PL intensities of AuNC@MUA in methanol, ethanol, and water, it has been successfully applied in detecting methanol in adulterated wine models (methanol-ethanol-water mixtures).

Solid-State Changes in Ligand-to-Metal Charge-Transfer Spectra of (NH3)5RuIII(2,4-dihydroxybenzoate) and (NH3)5RuIII(xanthine) Chromophores

2008 ◽  
Vol 47 (21) ◽  
pp. 9813-9827 ◽  
Author(s):  
Karsten Krogh-Jespersen ◽  
Robert T. Stibrany ◽  
Elizabeth John ◽  
John D. Westbrook ◽  
Thomas J. Emge ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Solid State ◽  
Metal Charge ◽  
State Changes ◽  
Metal Charge Transfer

scholarly journals The impact of lipid head-groups in GUVs on electron transfer by surface-adsorbed fluorescent gold nanoclusters

2021 ◽  
Author(s):  
Arunavo Chatterjee ◽  
Pradipta Purkayastha
Keyword(s):  
Electron Transfer ◽  
Charge Transfer ◽  
Aqueous Medium ◽  
Photoinduced Electron Transfer ◽  
Gold Nanoclusters ◽  
Metal Charge ◽  
Head Groups ◽  
The Impact ◽  
Metal Charge Transfer

The ligand-to-metal charge transfer in gold nanoclusters gets influenced by the interacting lipid that regulates photoinduced electron transfer in the aqueous medium.

scholarly journals POF-Based Solar Concentrators Incorporating Dyes and Europium Chelates

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2667
Author(s):  
Ander Vieira ◽  
Jon Arrue ◽  
Begoña García-Ramiro ◽  
Felipe Jiménez ◽  
María Asunción Illarramendi ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Organic Dyes ◽  
Radiative Energy ◽  
Quantum Yields ◽  
Solar Concentrators ◽  
Europium Ion ◽  
Luminescent Solar Concentrators ◽  
Simplifying Assumptions ◽  
Europium Chelates ◽  
Polymer Optical Fibers

In this paper, useful models that enable time-efficient computational analyses of the performance of luminescent solar concentrators (LSCs) are developed and thoroughly described. These LSCs are based on polymer optical fibers codoped with organic dyes and/or europium chelates. The interest in such dopants lies in the availability of new dyes with higher quantum yields and in the photostability and suitable absorption and emission bands of europium chelates. Time-efficiency without compromising accuracy is especially important for the simulation of europium chelates, in which non-radiative energy transfers from the absorbing ligands to the europium ion and vice versa are so fast that the discretization in time, in the absence of some simplifying assumptions, would have to be very fine. Some available experimental results are also included for the sake of comparison.

Tuning metal to metal charge transfer properties in cyanidometal-bridged complexes by changing the auxiliary ligand on the bridge

2021 ◽  
Author(s):  
Qing-Dou Xu ◽  
Chen Zeng ◽  
Shao-Dong Su ◽  
Yu-Ying Yang ◽  
Sheng-Min Hu ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Auxiliary Ligand ◽  
Metal Charge ◽  
Transfer Properties ◽  
Metal Charge Transfer

This work shows that the energy of MMCT in cyanidometal-bridged complexes can be tuned systematically by changing the auxiliary ligand of the cyanidometal bridge.

Sign in / Sign up

Export Citation Format

Share Document