Size-dependent dynamics in excited states of gold clusters: From oscillatory motion to photoinduced melting

2007 ◽  
Vol 127 (16) ◽  
pp. 164312 ◽  
Author(s):  
Jörg Stanzel ◽  
Florian Burmeister ◽  
Matthias Neeb ◽  
Wolfgang Eberhardt ◽  
Roland Mitrić ◽  
...  
Keyword(s):  
Excited States ◽  
Gold Clusters ◽  
Oscillatory Motion ◽  
Size Dependent

Size‐Dependent Light Harvesting from Nonthermalized Excited States of Gold Clusters

Solar RRL ◽  
2021 ◽  
pp. 2000710
Author(s):  
Kyunglim Pyo ◽  
Sang Myeong Han ◽  
Hongmei Xu ◽  
Sukanya Saha ◽  
Guda Ramakrishna ◽  
...  
Keyword(s):  
Excited States ◽  
Light Harvesting ◽  
Gold Clusters ◽  
Size Dependent

Size-Dependent Effects in EPR and Luminescence Spectra of NH4BPh4 Excited States: from Bulk to Nanoparticles

2011 ◽  
Vol 40 (4) ◽  
pp. 459-469 ◽  
Author(s):  
O. V. Antonova ◽  
V. A. Nadolinny ◽  
E. A. Il’inchik ◽  
M. K. Kovalev ◽  
A. P. Yelisseyev
Keyword(s):  
Excited States ◽  
Luminescence Spectra ◽  
Size Dependent

scholarly journals Aromaticity and Antiaromaticity in the Excited States of Porphyrin Nanorings

2019 ◽  
Author(s):  
Martin Peeks ◽  
Juliane Gong ◽  
Kirstie McLoughlin ◽  
Takayuki Kobatake ◽  
Renee Haver ◽  
...  
Keyword(s):  
Excited State ◽  
Excited States ◽  
Density Functional ◽  
Ring Size ◽  
Critical Importance ◽  
Peak Wavelength ◽  
Functional Theory ◽  
Size Dependent ◽  
Nucleus Independent Chemical Shift ◽  
Radiative Rate

Aromaticity can be a useful concept for predicting the behavior of excited states. Here we show that π-conjugated porphyrin nanorings exhibit size-dependent excited-state global aromaticity and antiaromaticity, for rings containing up to eight porphyrin subunits, although they have no significant global aromaticity in their neutral singlet ground states. Applying Baird’s law, odd rings ([4n] π-electrons) are aromatic in their excited states, whereas the excited states of even rings ([4n+2] π-electrons) are antiaromatic. These predictions are borne out by density functional theory (DFT) studies of the nucleus-independent chemical shift in the T1 triplet state of each ring, which reveal the critical importance of the triplet delocalization to the emergence of excited-state aromaticity. The singlet excited states (S1) are explored by measurements of the radiative rate and fluorescence peak wavelength, revealing a subtle odd-even alternation as a function of ring size, consistent with symmetry-breaking in antiaromatic excited states.

Photoelectrochemical analysis of size-dependent electronic structures of gold clusters supported on TiO2

Nanoscale ◽  
2012 ◽  
Vol 4 (14) ◽  
pp. 4217 ◽  
Author(s):  
Atsushi Kogo ◽  
Nobuyuki Sakai ◽  
Tetsu Tatsuma
Keyword(s):  
Electronic Structures ◽  
Gold Clusters ◽  
Size Dependent

The photoluminescence mechanism of ultra-small gold clusters

2016 ◽  
Vol 18 (26) ◽  
pp. 17320-17325 ◽  
Author(s):  
Liangliang Wu ◽  
Weihai Fang ◽  
Xuebo Chen
Keyword(s):  
Excited States ◽  
Gold Clusters ◽  
Radiative Decays ◽  
Photoluminescence Mechanism ◽  
Aurophilic Interactions

The photoluminescence mechanism of ultra-small gold clusters was proposed to reveal the origin of excited states formed by aurophilic interactions and their radiative decays.

scholarly journals The Sensitization of Scintillation in Polymeric Composites Based on Fluorescent Nanocomplexes

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3387
Author(s):  
Irene Villa ◽  
Beatriz Santiago Gonzalez ◽  
Matteo Orfano ◽  
Francesca Cova ◽  
Valeria Secchi ◽  
...  
Keyword(s):  
Composite Materials ◽  
Excited States ◽  
Rhodamine 6G ◽  
Polymeric Composite ◽  
Steady State Solution ◽  
Gold Clusters ◽  
Organic Dye ◽  
Rate Equations ◽  
Characteristic Parameters ◽  
Emitting Species

The sensitization of scintillation was investigated in crosslinked polymeric composite materials loaded with luminescent gold clusters aggregates acting as sensitizers, and with organic dye rhodamine 6G as the emitting species. The evolution in time of the excited states population in the systems is described by a set of coupled rate equations, in which steady state solution allowed obtainment of an expression of the sensitization efficacy as a function of the characteristic parameters of the employed luminescent systems. The results obtained indicate that the realization of sensitizer/emitter scintillating complexes is the strategy that must be pursued to maximize the sensitization effect in composite materials.

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