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

doi:10.1016/j.poly.2015.05.024

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^*

^*Autor/a de correspondencia de este trabajo

IQS School of Engineering

Producción científica: Artículo en revista indizada › Artículo › revisión exhaustiva

5 Citas (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 Re^I 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 original	Inglés
Páginas (desde-hasta)	227-233
Número de páginas	7
Publicación	Polyhedron
Volumen	97
DOI	https://doi.org/10.1016/j.poly.2015.05.024
Estado	Publicada - 12 jun 2015

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10.1016/j.poly.2015.05.024

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@article{d468faf5108e4edea21d6b276aee8b45,

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",

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",

note = "Funding Information: The authors gratefully acknowledge partial financial support of Direcci{\'o}n de Investigaci{\'o}n Universidad Andres Bello, grant DI-111-12/R, Comision Nacional de Ciencia y Tecnolog{\'i}a, grants FONDECYT 1120865 (AV) and 1140343 (EC) and ACE-03. AV is a member of Financiamiento Basal para Centros Cient{\'i}ficos y Tecnol{\'o}gicos de Excelencia FB0807. Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd. All rights reserved.",

year = "2015",

month = jun,

day = "12",

doi = "10.1016/j.poly.2015.05.024",

language = "English",

volume = "97",

pages = "227--233",

journal = "Polyhedron",

issn = "0277-5387",

publisher = "Elsevier Ltd.",

}

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

N1 - Funding Information: The authors gratefully acknowledge partial financial support of Dirección de Investigación Universidad Andres Bello, grant DI-111-12/R, Comision Nacional de Ciencia y Tecnología, grants FONDECYT 1120865 (AV) and 1140343 (EC) and ACE-03. AV is a member of Financiamiento Basal para Centros Científicos y Tecnológicos de Excelencia FB0807. Publisher Copyright: © 2015 Elsevier Ltd. All rights reserved.

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

UR - https://www.scopus.com/pages/publications/84931264063

U2 - 10.1016/j.poly.2015.05.024

DO - 10.1016/j.poly.2015.05.024

M3 - Article

AN - SCOPUS:84931264063

SN - 0277-5387

VL - 97

SP - 227

EP - 233

JO - Polyhedron

JF - Polyhedron