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Excited-state relaxation dynamics of Re(I) tricarbonyl complexes with macrocyclic phenanthroline ligands studied by time-resolved IR spectroscopy

SYSNO ASEP	0336067
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Excited-state relaxation dynamics of Re(I) tricarbonyl complexes with macrocyclic phenanthroline ligands studied by time-resolved IR spectroscopy
Title	Relaxační dynamika excitovaných stavů tris-karbonylových komplexů Re(I) s makrocyclickými fenantrolinovými ligandy studovaná časově rozlišenou IR spektroskopií
Author(s)	Blanco-Rodríguez, A. M. (GB) Towrie, M. (GB) Collin, J. - P. (FR) Záliš, Stanislav (UFCH-W)_{RID, ORCID} Vlček, Antonín (UFCH-W)_{RID, ORCID}
Source Title	Dalton Transactions. - : Royal Society of Chemistry - ISSN 1477-9226 -, č. 20 (2009), s. 3941-3949
Number of pages	9 s.
Language	eng - English
Country	GB - United Kingdom
Keywords	Raman spectroscopy ; molecular machine prototypes ; infrared spectroscopy
Subject RIV	CG - Electrochemistry
R&D Projects	OC09043 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	OC 139 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z40400503 - UFCH-W (2005-2011)
UT WOS	000266035000009
DOI	10.1039/b820748h
Annotation	Two sets of supramolecular rhenium carbonyl-phenanthroline complexes were prepared: fac-[Re(Cl)(CO)(3)(N,N)] and fac-[Re(Etpy)(CO)(3)(N,N)](+), where N, N is 2,9-di-anisyl-1, 10-phenanthroline (dap) or two related macrocyclic ligands, where the two anisyl groups are connected by a polyether chain of different length and rigidity (m27, m30), which wraps around and above the equatorial Re(CO)(2) group. The excited-state character and relaxation dynamics of these complexes were investigated by picosecond time-resolved IR spectroscopy in the spectral region of C O stretching vibrations, nu(CO). The results were interpreted with the aid of DFT and TD-DFT calculations of the molecular structures and electron-density redistribution upon excitation. [Re(Cl)(CO)(3)(phen-macrocycle)] in CH2Cl2 have the same type of lowest excited state as analogous acyclic phen or bpy complexes, that is a mixed Re(CO)(3) -> phen and Cl -> phen MLCT/XLCT, together with some pi pi*(phen) IL character.
Workplace	J. Heyrovsky Institute of Physical Chemistry
Contact	Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196
Year of Publishing	2010

Number of the records: 1