A comparative study of the redox and excited state properties of (nBu4N)2[Mo6X14] and (nBu4N)2[Mo6X8(CF3COO)6] (X = Cl, Br, or I)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F13%3A00392093" target="_blank" >RIV/68378271:_____/13:00392093 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388980:_____/13:00392093 RIV/61388955:_____/13:00392093 RIV/60076658:12310/13:43885283

Výsledek na webu

<a href="http://dx.doi.org/10.1039/c3dt32863e" target="_blank" >http://dx.doi.org/10.1039/c3dt32863e</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/c3dt32863e" target="_blank" >10.1039/c3dt32863e</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A comparative study of the redox and excited state properties of (nBu4N)2[Mo6X14] and (nBu4N)2[Mo6X8(CF3COO)6] (X = Cl, Br, or I)

Popis výsledku v původním jazyce

The excited-state dynamics, luminescence, and redox properties of a series of hexanuclear molybdenum cluster complexes, (nBu4N)2[Mo6X14] and (nBu4N)2[Mo6X8(CF3COO)6] (X = Cl, Br, or I), were investigated. Substitution of the apical halogen ligands for the trifluoroacetate ligands increased the oxidation potentials and induced a blue shift in the absorption and luminescence bands as well as a considerable increase in the luminescence quantum yields for heavy inner ligands. Time-resolved transient absorption measurements showed that the intersystem crossing from the excited singlet states is ultrafast with time constants ranging between <120 fs and 1.68 ps and leads to hot triplet states. The following cooling occurred at a ps time scale and was assignedto electronic redistribution within the emissive triplet state sublevels. The formation of singlet oxygen, O2(1?g), suggested earlier on the basis of photooxidation experiments for some complexes, was revised by direct measurements of O2

Název v anglickém jazyce

A comparative study of the redox and excited state properties of (nBu4N)2[Mo6X14] and (nBu4N)2[Mo6X8(CF3COO)6] (X = Cl, Br, or I)

Popis výsledku anglicky

The excited-state dynamics, luminescence, and redox properties of a series of hexanuclear molybdenum cluster complexes, (nBu4N)2[Mo6X14] and (nBu4N)2[Mo6X8(CF3COO)6] (X = Cl, Br, or I), were investigated. Substitution of the apical halogen ligands for the trifluoroacetate ligands increased the oxidation potentials and induced a blue shift in the absorption and luminescence bands as well as a considerable increase in the luminescence quantum yields for heavy inner ligands. Time-resolved transient absorption measurements showed that the intersystem crossing from the excited singlet states is ultrafast with time constants ranging between <120 fs and 1.68 ps and leads to hot triplet states. The following cooling occurred at a ps time scale and was assignedto electronic redistribution within the emissive triplet state sublevels. The formation of singlet oxygen, O2(1?g), suggested earlier on the basis of photooxidation experiments for some complexes, was revised by direct measurements of O2

Druh

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

CEP obor

CA - Anorganická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/GA13-05114S" target="_blank" >GA13-05114S: Šestijaderné molybdenové klastry s laditelnými luminiscenčními vlastnostmi</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název periodika

Dalton Transactions

ISSN

1477-9226

e-ISSN

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Svazek periodika

42

Číslo periodika v rámci svazku

19

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

7224-7232

Kód UT WoS článku

000317981700061

EID výsledku v databázi Scopus

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