Steady-state and time-resolved luminescence of Ru(II) polypyridine complexes attached to Ag nanoparticles: Effect of chemisorption in comparison with electrostatic bonding

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F15%3A10295354" target="_blank" >RIV/00216208:11310/15:10295354 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.saa.2015.05.088" target="_blank" >http://dx.doi.org/10.1016/j.saa.2015.05.088</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.saa.2015.05.088" target="_blank" >10.1016/j.saa.2015.05.088</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Steady-state and time-resolved luminescence of Ru(II) polypyridine complexes attached to Ag nanoparticles: Effect of chemisorption in comparison with electrostatic bonding

Popis výsledku v původním jazyce

Steady state and nanosecond time resolved luminescence (namely, 3MLCT phosphorescence) of [Ru(bpy)3]2+ and of [Ru(bpy)2(dcbpy)]2+/bpy = 2,20-bipyridine; dcbpy = 2,20-bipyridyl-4,40-dicarboxylic acid/attached to Ag NPs (the former by the electrostatic bonding, the latter by chemisorption) in non-aggregated Ag NP hydrosol systems has been investigated, and compared to the luminescence characteristics of the complexes in aqueous solutions. The intensity decrease of the 452 nm (and/or 455 nm, respectively)main band and elimination of the short wavelength shoulders in the excitation spectra and the intensity decrease of the emission spectra observed for both complexes upon their attachment to Ag NPs is attributed to the overlap of the excitation spectra with the surface plasmon extinction (SPE) of Ag NPs. The overlap leads to a loss of excitation energy by SPE as well as to a decrease of the 1MLCT to 3MLCT intersystem crossing efficiency. The time-resolved luminescence study shows that the

Název v anglickém jazyce

Steady-state and time-resolved luminescence of Ru(II) polypyridine complexes attached to Ag nanoparticles: Effect of chemisorption in comparison with electrostatic bonding

Popis výsledku anglicky

Steady state and nanosecond time resolved luminescence (namely, 3MLCT phosphorescence) of [Ru(bpy)3]2+ and of [Ru(bpy)2(dcbpy)]2+/bpy = 2,20-bipyridine; dcbpy = 2,20-bipyridyl-4,40-dicarboxylic acid/attached to Ag NPs (the former by the electrostatic bonding, the latter by chemisorption) in non-aggregated Ag NP hydrosol systems has been investigated, and compared to the luminescence characteristics of the complexes in aqueous solutions. The intensity decrease of the 452 nm (and/or 455 nm, respectively)main band and elimination of the short wavelength shoulders in the excitation spectra and the intensity decrease of the emission spectra observed for both complexes upon their attachment to Ag NPs is attributed to the overlap of the excitation spectra with the surface plasmon extinction (SPE) of Ag NPs. The overlap leads to a loss of excitation energy by SPE as well as to a decrease of the 1MLCT to 3MLCT intersystem crossing efficiency. The time-resolved luminescence study shows that the

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

—

Projekt

<a href="/cs/project/GAP208%2F10%2F0941" target="_blank" >GAP208/10/0941: Ovlivňování povrchem-modifikovaných optických procesů molekul a polovodičových kvantových teček plasmonovými resonancemi souborů kovových nanočástic.</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy

ISSN

1386-1425

e-ISSN

—

Svazek periodika

150

Číslo periodika v rámci svazku

2015

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

657-663

Kód UT WoS článku

000361774900075

EID výsledku v databázi Scopus

2-s2.0-84935925437