Evidence map›Paper›PMID 39875727›Full record

ArticleCommunications chemistry2025

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

Yuichi Kitagawa, Toranosuke Tomikawa, Kota Aikawa, Shiori Miyazaki, Tomoko Akama, Masato Kobayashi, Mengfei Wang, Sunao Shoji, Koji Fushimi, Kiyoshi Miyata and 5 more

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Communications chemistry, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Article
  2. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

15 authors.

Yuichi Kitagawa *Faculty of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan. y-kitagawa@eng.hokudai.ac.jp.ORCID http://orcid.org/0000-0003-1487-2531
Toranosuke Tomikawa *Graduate School of Chemical Sciences and Engineering, Hokkaido University, Kita 13, Nishi 8, Sapporo, Hokkaido, 060-8628, Japan.
Kota AikawaGraduate School of Chemical Sciences and Engineering, Hokkaido University, Kita 13, Nishi 8, Sapporo, Hokkaido, 060-8628, Japan.
Shiori MiyazakiDepartment of Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 829-0395, Japan.
Tomoko AkamaInstitute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita 21, Nishi 10, Kita-ku, Sapporo, Hokkaido, 001-0021, Japan.
Masato KobayashiInstitute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita 21, Nishi 10, Kita-ku, Sapporo, Hokkaido, 001-0021, Japan.
Mengfei WangInstitute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita 21, Nishi 10, Kita-ku, Sapporo, Hokkaido, 001-0021, Japan.
Sunao ShojiFaculty of Engineering, Nara Women's University, Kitauoya-Nishimachi, Nara, 630-8506, Japan.ORCID http://orcid.org/0000-0002-0329-1136
Koji FushimiFaculty of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan.ORCID http://orcid.org/0000-0002-8945-0969
Kiyoshi MiyataDepartment of Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 829-0395, Japan.ORCID http://orcid.org/0000-0001-6748-1337
Yuichi HiraiNational Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan.ORCID http://orcid.org/0000-0002-0252-1243
Takayuki NakanishiNational Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan.
Ken OndaDepartment of Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 829-0395, Japan.ORCID http://orcid.org/0000-0003-1724-2009
Tetsuya TaketsuguInstitute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita 21, Nishi 10, Kita-ku, Sapporo, Hokkaido, 001-0021, Japan.ORCID http://orcid.org/0000-0002-1337-6694
Yasuchika HasegawaFaculty of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan. hasegaway@eng.hokudai.ac.jp.ORCID http://orcid.org/0000-0002-6622-8011

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

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 demonstration of CT emission from 4f- to π-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 trivalent gadolinium (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.

Identifiers

PMID39875727
PMCPMC11775200

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.