Triheterometallic Lanthanide Complexes Prepared from Kinetically Inert Lanthanide Building Blocks

Thomas Just Sørensen; Manuel Tropiano; Alan M. Kenwright; Stephen Faulkner

doi:10.1002/ejic.201700027

Triheterometallic Lanthanide Complexes Prepared from Kinetically Inert Lanthanide Building Blocks

Thomas Just Sørensen^*, Manuel Tropiano, Alan M. Kenwright, Stephen Faulkner

^*Corresponding author af dette arbejde

Kemisk Institut

9 Citationer (Scopus)

46 Downloads (Pure)

Abstract

Three molecular structures, each containing three different lanthanide(III) centres, have been prepared by coupling three kinetically inert lanthanide(III) complexes in an Ugi reaction. These 2 kDa molecules were purified by dialysis and characterised by NMR and luminescence techniques. The photophysical properties of these heterotrimetallic complexes were investigated and are discussed by comparison with simpler, but related, heterodimetallic compounds. It was found that an aminonaphthalene unit inhibits the sensitisation of terbium, and that the spatial arrangement of the chromophores and lanthanide(III) centres in these molecules inhibits the efficient sensitisation of europium. We conclude that the intramolecular collisions required for efficient Dexter energy transfer from the sensitiser to the lanthanide(III) centre can be prevented by steric congestion

Originalsprog	Engelsk
Tidsskrift	European Journal of Inorganic Chemistry
Vol/bind	15
Sider (fra-til)	2165-2172
Antal sider	9
ISSN	1434-1948
DOI	https://doi.org/10.1002/ejic.201700027
Status	Udgivet - 18 apr. 2017

Adgang til dokumentet

10.1002/ejic.201700027

Triheterometallic Lanthanide Complexes Prepared from Kinetically Inert Lanthanide Building Blocks_postprintAccepteret manuskript, 1,8 MBLicens: Ikke-specificeret

Citationsformater

@article{ec5592a565314690a9f7521d78b71572,

title = "Triheterometallic Lanthanide Complexes Prepared from Kinetically Inert Lanthanide Building Blocks",

abstract = "Three molecular structures, each containing three different lanthanide(III) centres, have been prepared by coupling three kinetically inert lanthanide(III) complexes in an Ugi reaction. These 2 kDa molecules were purified by dialysis and characterised by NMR and luminescence techniques. The photophysical properties of these heterotrimetallic complexes were investigated and are discussed by comparison with simpler, but related, heterodimetallic compounds. It was found that an aminonaphthalene unit inhibits the sensitisation of terbium, and that the spatial arrangement of the chromophores and lanthanide(III) centres in these molecules inhibits the efficient sensitisation of europium. We conclude that the intramolecular collisions required for efficient Dexter energy transfer from the sensitiser to the lanthanide(III) centre can be prevented by steric congestion.",

keywords = "Lanthanides, Luminescence, Molecular building blocks, Solution structures, Synthesis design",

author = "S{\o}rensen, {Thomas Just} and Manuel Tropiano and Kenwright, {Alan M.} and Stephen Faulkner",

year = "2017",

month = apr,

day = "18",

doi = "10.1002/ejic.201700027",

language = "English",

volume = "15",

pages = "2165--2172",

journal = "European Journal of Inorganic Chemistry",

issn = "1434-1948",

publisher = "Wiley - V C H Verlag GmbH & Co. KGaA",

}

TY - JOUR

T1 - Triheterometallic Lanthanide Complexes Prepared from Kinetically Inert Lanthanide Building Blocks

AU - Sørensen, Thomas Just

AU - Tropiano, Manuel

AU - Kenwright, Alan M.

AU - Faulkner, Stephen

PY - 2017/4/18

Y1 - 2017/4/18

N2 - Three molecular structures, each containing three different lanthanide(III) centres, have been prepared by coupling three kinetically inert lanthanide(III) complexes in an Ugi reaction. These 2 kDa molecules were purified by dialysis and characterised by NMR and luminescence techniques. The photophysical properties of these heterotrimetallic complexes were investigated and are discussed by comparison with simpler, but related, heterodimetallic compounds. It was found that an aminonaphthalene unit inhibits the sensitisation of terbium, and that the spatial arrangement of the chromophores and lanthanide(III) centres in these molecules inhibits the efficient sensitisation of europium. We conclude that the intramolecular collisions required for efficient Dexter energy transfer from the sensitiser to the lanthanide(III) centre can be prevented by steric congestion.

AB - Three molecular structures, each containing three different lanthanide(III) centres, have been prepared by coupling three kinetically inert lanthanide(III) complexes in an Ugi reaction. These 2 kDa molecules were purified by dialysis and characterised by NMR and luminescence techniques. The photophysical properties of these heterotrimetallic complexes were investigated and are discussed by comparison with simpler, but related, heterodimetallic compounds. It was found that an aminonaphthalene unit inhibits the sensitisation of terbium, and that the spatial arrangement of the chromophores and lanthanide(III) centres in these molecules inhibits the efficient sensitisation of europium. We conclude that the intramolecular collisions required for efficient Dexter energy transfer from the sensitiser to the lanthanide(III) centre can be prevented by steric congestion.

KW - Lanthanides

KW - Luminescence

KW - Molecular building blocks

KW - Solution structures

KW - Synthesis design

U2 - 10.1002/ejic.201700027

DO - 10.1002/ejic.201700027

M3 - Journal article

AN - SCOPUS:85013392727

SN - 1434-1948

VL - 15

SP - 2165

EP - 2172

JO - European Journal of Inorganic Chemistry

JF - European Journal of Inorganic Chemistry

ER -

Triheterometallic Lanthanide Complexes Prepared from Kinetically Inert Lanthanide Building Blocks

Abstract

Adgang til dokumentet

Fingeraftryk

Citationsformater