# Charge transfer emission between π- and 4f-orbitals in a trivalent europium complex

https://mdr.nims.go.jp/datasets/2153ef15-ec8f-4f9f-abba-2f19a5048bb6

## File

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## Id

2153ef15-ec8f-4f9f-abba-2f19a5048bb6

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-04-04T00:10:04.949826Z

## Updated at

2025-05-16T03:30:23.521684Z

## Published at

2025-05-16T03:19:05.180567Z

## Doi



## First published url

https://doi.org/10.1038/s42004-025-01420-6

## Date published

2025-01-28

## Recorded date published



## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Charge transfer emission between π- and 4f-orbitals in a trivalent europium
    complex
  title_type: original
  lang: en

## Description

- description: Photoinduced metal-to-ligand (or ligand-to-metal) charge-transfer (CT)
    states in metal complexes have been extensively studied toward the development
    of luminescent materials. However, previous studies have mainly focused on CT
    transitions between d- and π-orbitals. Herein, we report the first demonstration
    of CT emission from 4f to  orbitals using a trivalent europium (Eu(III)) complex,
    supported by both experimental and theoretical analyses. The Eu(III) complex exhibits
    an eight-coordination structure, comprising three anionic nitrates and two neutral
    electron-donating ligands containing a carbazole unit. The diffuse reflectance
    spectrum of the complex displays an absorption band at 440 nm and time-resolved
    emission analyses reveal a characteristic emission band at 550 nm. Comparative
    studies employing a Gd(III) complex, alongside quantum chemical analyses, confirm
    that the observed absorption and emission bands are associated with CT transitions
    between π and 4f orbitals. The observation of CT emission based on the 4f orbital
    offers novel insights into the field of molecular luminescence science and technology.
  description_type: abstract
  lang: und

## Creator

- name: Yuichi Kitagawa
  role: author
- name: Toranosuke Tomikawa
  role: author
- name: Kota Aikawa
  role: author
- name: Shiori Miyazaki
  role: author
- name: Tomoko Akama
  role: author
- name: Masato Kobayashi
  role: author
- name: Mengfei Wang
  role: author
- name: Sunao Shoji
  role: author
- name: Koji Fushimi
  role: author
- name: Kiyoshi Miyata
  role: author
- name: Yuichi Hirai
  role: author
  orcid: https://orcid.org/0000-0002-0252-1243
  organization: National Institute for Materials Science
- name: Takayuki Nakanishi
  role: author
  orcid: https://orcid.org/0000-0003-3412-2842
  organization: National Institute for Materials Science
- name: Ken Onda
  role: author
- name: Tetsuya Taketsugu
  role: author
- name: Yasuchika Hasegawa
  role: author

## Contact agent



## Publisher

organization: Springer Science and Business Media LLC

## Managing organization



## Keyword

- subject: lanthanide
  schema: not_defined

## Rights

- identifier: https://creativecommons.org/licenses/by-nc-nd/4.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo



## Journal

- title: Communications Chemistry
  issn: '23993669'
  volume: '8'
  article_number: '24'

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## Fileset

- id: 4ffdc5b0-0e24-4b8f-9942-4040bc5ed4bf
  filename: s42004-025-01420-6.pdf
  content_type: application/pdf
  size: 1381917
  md5: 7e92983417beda7cdef8990f4a5caedc

## Thumbnail

fileset_id: 4ffdc5b0-0e24-4b8f-9942-4040bc5ed4bf
filename: s42004-025-01420-6.pdf