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 for this work

Department of Chemistry

9 Citations (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.

Original language	English
Journal	European Journal of Inorganic Chemistry
Volume	15
Pages (from-to)	2165-2172
Number of pages	9
ISSN	1434-1948
DOIs	https://doi.org/10.1002/ejic.201700027
Publication status	Published - 18 Apr 2017

Keywords

Lanthanides
Luminescence
Molecular building blocks
Solution structures
Synthesis design

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Triheterometallic Lanthanide Complexes Prepared from Kinetically Inert Lanthanide Building Blocks_postprintAccepted author manuscript, 1.8 MBLicence: Unspecified

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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.",

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

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doi = "10.1002/ejic.201700027",

language = "English",

volume = "15",

pages = "2165--2172",

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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

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Keywords

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