4f-intermediate valence in an ytterbium-bipyridine coordination solid

Evgeniia Luneva; Maja A. Dunstan; Frédéric Aribot; Nathan J. Yutronkie; Joseph E. McPeak; Andrei Rogalev; Grégory Nocton; Kasper S. Pedersen

doi:10.1039/d5cc04048e

4f-intermediate valence in an ytterbium-bipyridine coordination solid

Evgeniia Luneva
, Maja A. Dunstan^*
, Frédéric Aribot
, Nathan J. Yutronkie
, Joseph E. McPeak
, Andrei Rogalev
, Grégory Nocton
, Kasper S. Pedersen^*

^*Corresponding author for this work

European Synchrotron Radiation Facility
University of Copenhagen
CNRS

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

We report the first structurally characterised coordination solids based on decamethylytterbocene, using bipyridine linkers to form YbCp^*₂(bipy) and YbCp^*₂(Me2bipy). Analogous to their mononuclear cousins known for intermediate valence, spectroscopic evidence suggests that YbCp^*₂(bipy) features a multiconfigurational ground state, composed of a superposition of an open-shell ligand non-innocent 4f¹³(π*)¹ state and a closed-shell 4f¹⁴ state. Our findings mark a first step toward increasing electronic correlations in lanthanide-organic frameworks, with the aim of realising materials with coexisting electronic transport and emergent magnetic properties.

Original language	English
Journal	Chemical Communications
Volume	61
Issue number	77
Pages (from-to)	14999-15002
ISSN	1359-7345
DOIs	https://doi.org/10.1039/d5cc04048e
Publication status	Published - 2025

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@article{d674ebf2ea1f42699a2c623a0b466328,

title = "4f-intermediate valence in an ytterbium-bipyridine coordination solid",

abstract = "We report the first structurally characterised coordination solids based on decamethylytterbocene, using bipyridine linkers to form YbCp*2(bipy) and YbCp*2(Me2bipy). Analogous to their mononuclear cousins known for intermediate valence, spectroscopic evidence suggests that YbCp*2(bipy) features a multiconfigurational ground state, composed of a superposition of an open-shell ligand non-innocent 4f13(π*)1 state and a closed-shell 4f14 state. Our findings mark a first step toward increasing electronic correlations in lanthanide-organic frameworks, with the aim of realising materials with coexisting electronic transport and emergent magnetic properties.",

author = "Evgeniia Luneva and Dunstan, \{Maja A.\} and Fr{\'e}d{\'e}ric Aribot and Yutronkie, \{Nathan J.\} and McPeak, \{Joseph E.\} and Andrei Rogalev and Gr{\'e}gory Nocton and Pedersen, \{Kasper S.\}",

note = "Publisher Copyright: {\textcopyright} 2025 The Royal Society of Chemistry.",

year = "2025",

doi = "10.1039/d5cc04048e",

language = "English",

volume = "61",

pages = "14999--15002",

journal = "Chemical Communications",

issn = "1359-7345",

publisher = "Royal Society of Chemistry",

number = "77",

}

TY - JOUR

T1 - 4f-intermediate valence in an ytterbium-bipyridine coordination solid

AU - Luneva, Evgeniia

AU - Dunstan, Maja A.

AU - Aribot, Frédéric

AU - Yutronkie, Nathan J.

AU - McPeak, Joseph E.

AU - Rogalev, Andrei

AU - Nocton, Grégory

AU - Pedersen, Kasper S.

PY - 2025

Y1 - 2025

N2 - We report the first structurally characterised coordination solids based on decamethylytterbocene, using bipyridine linkers to form YbCp*2(bipy) and YbCp*2(Me2bipy). Analogous to their mononuclear cousins known for intermediate valence, spectroscopic evidence suggests that YbCp*2(bipy) features a multiconfigurational ground state, composed of a superposition of an open-shell ligand non-innocent 4f13(π*)1 state and a closed-shell 4f14 state. Our findings mark a first step toward increasing electronic correlations in lanthanide-organic frameworks, with the aim of realising materials with coexisting electronic transport and emergent magnetic properties.

AB - We report the first structurally characterised coordination solids based on decamethylytterbocene, using bipyridine linkers to form YbCp*2(bipy) and YbCp*2(Me2bipy). Analogous to their mononuclear cousins known for intermediate valence, spectroscopic evidence suggests that YbCp*2(bipy) features a multiconfigurational ground state, composed of a superposition of an open-shell ligand non-innocent 4f13(π*)1 state and a closed-shell 4f14 state. Our findings mark a first step toward increasing electronic correlations in lanthanide-organic frameworks, with the aim of realising materials with coexisting electronic transport and emergent magnetic properties.

U2 - 10.1039/d5cc04048e

DO - 10.1039/d5cc04048e

M3 - Journal article

C2 - 40891300

AN - SCOPUS:105016829763

SN - 1359-7345

VL - 61

SP - 14999

EP - 15002

JO - Chemical Communications

JF - Chemical Communications

IS - 77

ER -

4f-intermediate valence in an ytterbium-bipyridine coordination solid

Abstract

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