Conservation of vibrational coherence in ultrafast electronic relaxation: The case of diplatinum complexes in solution

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F17%3A00473712" target="_blank" >RIV/61388955:_____/17:00473712 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.cplett.2017.02.071" target="_blank" >http://dx.doi.org/10.1016/j.cplett.2017.02.071</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cplett.2017.02.071" target="_blank" >10.1016/j.cplett.2017.02.071</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Conservation of vibrational coherence in ultrafast electronic relaxation: The case of diplatinum complexes in solution

Popis výsledku v původním jazyce

We report the results of ultrafast transient absorption studies of tetrakis(l-pyrophosphito) diplatinate(II), [Pt-2(mu-P(2)O(5)H2)(4)](4) (Pt(pop)) and its perfluoroborated derivative [Pt-2(mu-P2O5(BF2)(4)](4) (Pt(pop-BF2)) in water and acetonitrile upon excitation of high lying (< 300 nm) UV absorption bands. We observe an ultrafast relaxation channel from high lying states to the lowest triplet state that partly (Pt(pop) in H2O, Pt(pop-BF2)) or fully (Pt(pop) in MeCN) bypasses the lowest singlet excited state. As a consequence, vibrational wave packets are detected in the lowest triplet state and/or the lowest excited singlet of both complexes, even though the electronic relaxation cascade spans ca. 2 and 1.3 eV, respectively. In the case of Pt(pop-BF2), coherent wave packets generated by optical excitation of the lowest singlet 1A2u state also are reported. Overall, the reported dephasing times of the Pt-Pt oscillator in the ground, singlet and triplet states do not depend much on the solvent or the molecular structure. (C) 2017 Elsevier B. V. All rights reserved.

Název v anglickém jazyce

Conservation of vibrational coherence in ultrafast electronic relaxation: The case of diplatinum complexes in solution

Popis výsledku anglicky

We report the results of ultrafast transient absorption studies of tetrakis(l-pyrophosphito) diplatinate(II), [Pt-2(mu-P(2)O(5)H2)(4)](4) (Pt(pop)) and its perfluoroborated derivative [Pt-2(mu-P2O5(BF2)(4)](4) (Pt(pop-BF2)) in water and acetonitrile upon excitation of high lying (< 300 nm) UV absorption bands. We observe an ultrafast relaxation channel from high lying states to the lowest triplet state that partly (Pt(pop) in H2O, Pt(pop-BF2)) or fully (Pt(pop) in MeCN) bypasses the lowest singlet excited state. As a consequence, vibrational wave packets are detected in the lowest triplet state and/or the lowest excited singlet of both complexes, even though the electronic relaxation cascade spans ca. 2 and 1.3 eV, respectively. In the case of Pt(pop-BF2), coherent wave packets generated by optical excitation of the lowest singlet 1A2u state also are reported. Overall, the reported dephasing times of the Pt-Pt oscillator in the ground, singlet and triplet states do not depend much on the solvent or the molecular structure. (C) 2017 Elsevier B. V. All rights reserved.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Chemical Physics Letters

ISSN

0009-2614

e-ISSN

—

Svazek periodika

683

Číslo periodika v rámci svazku

SEP 2017

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

112-120

Kód UT WoS článku

000405802200018

EID výsledku v databázi Scopus

2-s2.0-85014069774