Structural and photophysical properties of [(CO)3(phen)Re(μ-Br)Re(phen)(CO)3]+[(CO)3Re(μ-Br)3Re(CO)3]-: Where does its luminescence come from?

Hector Gallardo, Marjorie Cepeda-Plaza, Santi Nonell, Germán Günther, Eduardo Chamorro, Nancy Pizarro, Andrés Vega

Resultado de la investigación: Article

1 Cita (Scopus)

Resumen

The multimetallic complex [[(CO)3(phen)Re(μ-Br)Re(phen)(CO)3][(CO)3Re(μ-Br)3Re(CO)3]]·CH2Cl2 was prepared by direct reaction of (Re(CO)3(THF)Br)2 (THF: tetrahydrofuran) and 1,10-phenanthroline in a 1:1 ratio, followed by recrystallization in dichloromethane. The compound is an ionic salt where both, cation and anion, are bimetallic complexes. Inside both of them the ReI centers are bridged by one or three bromides respectively. The compound has an absorption band centered at 375 nm in CH2Cl2, which has been assigned to a MLCT band. Excitation at 375 nm produces luminescent emission at 608 nm. Comparison of these results with closely related rhenium complexes, in addition to Time Dependant-DFT analysis, allow us to propose the [(CO)3(phen)Re(μ-Br)Re(phen)(CO)3]+ cation as main responsible for luminescence. Luminescence lifetime and singlet oxygen formation quantum yield suggest also that the emissive excited state has a triplet character.

Idioma originalEnglish
Páginas (desde-hasta)227-233
Número de páginas7
PublicaciónPolyhedron
Volumen97
DOI
EstadoPublished - 12 jun 2015

Huella dactilar

Cations
Luminescence
Positive ions
luminescence
Rhenium
cations
Singlet Oxygen
Methylene Chloride
Dichloromethane
rhenium
Quantum yield
tetrahydrofuran
Bromides
Excited states
Discrete Fourier transforms
excitation
Anions
bromides
Absorption spectra
Negative ions

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Citar esto

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title = "Structural and photophysical properties of [(CO)3(phen)Re(μ-Br)Re(phen)(CO)3]+[(CO)3Re(μ-Br)3Re(CO)3]-: Where does its luminescence come from?",
abstract = "The multimetallic complex [[(CO)3(phen)Re(μ-Br)Re(phen)(CO)3][(CO)3Re(μ-Br)3Re(CO)3]]·CH2Cl2 was prepared by direct reaction of (Re(CO)3(THF)Br)2 (THF: tetrahydrofuran) and 1,10-phenanthroline in a 1:1 ratio, followed by recrystallization in dichloromethane. The compound is an ionic salt where both, cation and anion, are bimetallic complexes. Inside both of them the ReI centers are bridged by one or three bromides respectively. The compound has an absorption band centered at 375 nm in CH2Cl2, which has been assigned to a MLCT band. Excitation at 375 nm produces luminescent emission at 608 nm. Comparison of these results with closely related rhenium complexes, in addition to Time Dependant-DFT analysis, allow us to propose the [(CO)3(phen)Re(μ-Br)Re(phen)(CO)3]+ cation as main responsible for luminescence. Luminescence lifetime and singlet oxygen formation quantum yield suggest also that the emissive excited state has a triplet character.",
keywords = "Cation, Crystal structure, Luminescence, Multimetallic complex, Re<sup>I</sup>",
author = "Hector Gallardo and Marjorie Cepeda-Plaza and Santi Nonell and Germ{\'a}n G{\"u}nther and Eduardo Chamorro and Nancy Pizarro and Andr{\'e}s Vega",
year = "2015",
month = "6",
day = "12",
doi = "10.1016/j.poly.2015.05.024",
language = "English",
volume = "97",
pages = "227--233",
journal = "Polyhedron",
issn = "0277-5387",
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TY - JOUR

T1 - Structural and photophysical properties of [(CO)3(phen)Re(μ-Br)Re(phen)(CO)3]+[(CO)3Re(μ-Br)3Re(CO)3]-

T2 - Where does its luminescence come from?

AU - Gallardo, Hector

AU - Cepeda-Plaza, Marjorie

AU - Nonell, Santi

AU - Günther, Germán

AU - Chamorro, Eduardo

AU - Pizarro, Nancy

AU - Vega, Andrés

PY - 2015/6/12

Y1 - 2015/6/12

N2 - The multimetallic complex [[(CO)3(phen)Re(μ-Br)Re(phen)(CO)3][(CO)3Re(μ-Br)3Re(CO)3]]·CH2Cl2 was prepared by direct reaction of (Re(CO)3(THF)Br)2 (THF: tetrahydrofuran) and 1,10-phenanthroline in a 1:1 ratio, followed by recrystallization in dichloromethane. The compound is an ionic salt where both, cation and anion, are bimetallic complexes. Inside both of them the ReI centers are bridged by one or three bromides respectively. The compound has an absorption band centered at 375 nm in CH2Cl2, which has been assigned to a MLCT band. Excitation at 375 nm produces luminescent emission at 608 nm. Comparison of these results with closely related rhenium complexes, in addition to Time Dependant-DFT analysis, allow us to propose the [(CO)3(phen)Re(μ-Br)Re(phen)(CO)3]+ cation as main responsible for luminescence. Luminescence lifetime and singlet oxygen formation quantum yield suggest also that the emissive excited state has a triplet character.

AB - The multimetallic complex [[(CO)3(phen)Re(μ-Br)Re(phen)(CO)3][(CO)3Re(μ-Br)3Re(CO)3]]·CH2Cl2 was prepared by direct reaction of (Re(CO)3(THF)Br)2 (THF: tetrahydrofuran) and 1,10-phenanthroline in a 1:1 ratio, followed by recrystallization in dichloromethane. The compound is an ionic salt where both, cation and anion, are bimetallic complexes. Inside both of them the ReI centers are bridged by one or three bromides respectively. The compound has an absorption band centered at 375 nm in CH2Cl2, which has been assigned to a MLCT band. Excitation at 375 nm produces luminescent emission at 608 nm. Comparison of these results with closely related rhenium complexes, in addition to Time Dependant-DFT analysis, allow us to propose the [(CO)3(phen)Re(μ-Br)Re(phen)(CO)3]+ cation as main responsible for luminescence. Luminescence lifetime and singlet oxygen formation quantum yield suggest also that the emissive excited state has a triplet character.

KW - Cation

KW - Crystal structure

KW - Luminescence

KW - Multimetallic complex

KW - Re<sup>I</sup>

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DO - 10.1016/j.poly.2015.05.024

M3 - Article

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