# Reversible and Massive Structural Transformation in Meltable Cyanido‐bridged Coordination Polymer Crystals

https://mdr.nims.go.jp/datasets/bedf2a73-b9ed-44f7-996f-a552a8cc6dea

## File

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## Id

bedf2a73-b9ed-44f7-996f-a552a8cc6dea

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-12-01T02:46:00.435535Z

## Updated at

2025-12-01T07:30:04.199955Z

## Published at

2025-12-01T07:24:33.992815Z

## Doi



## First published url

https://doi.org/10.1002/chem.202502640

## Date published

2025-11-25

## Recorded date published

2025-11-25

## Resource type

journal_article

## Manuscript type

vor

## Collection



## Title

- title: Reversible and Massive Structural Transformation in Meltable Cyanido‐bridged
    Coordination Polymer Crystals
  title_type: original
  lang: en

## Description

- description: Cyanido (CN−)-bridged coordination polymers (CP) have been extensively
    studied as molecular-based functional materials. However, synthesizing 3D compounds
    composed only of metal ions and CN−—without bulky organic groups—and that melt
    before decomposing remains a considerable challenge. This difficulty arises because
    CN− strongly interconnect metal ions, forming rigid, dense frameworks with high
    melting points. In this study, we successfully synthesized a melting composite
    consisting of 3D KCd[Cu(CN)2]3 and 2D K2Cu3(CN)5 by dehydrating K2Cd(H2O)Cu4(CN)8·1.5H2O.
    Remarkably, nanodomains of these two compounds coexisted within single particles,
    allowing their crystal structures to be independently determined by 3D electron
    diffraction (MicroED) of the resulting powders. Each compound melted at its respective
    melting point, around 559 K. Notably, the melting point of KCd[Cu(CN)2]3 is unusually
    low for a 3D dense coordination framework. This atypically low melting point results
    from a combination of crystalline surface effects, and the entropy contribution
    of the dynamic, labile two-coordinate Cu centers in the framework. Additionally,
    we demonstrated a reversible transformation between the dehydrated mixture and
    the hydrated parent compound through exposure to water vapor, highlighting the
    dynamic and responsive nature of these CN−-based solid-state materials.
  description_type: abstract
  lang: und

## Creator

- name: Yuudai Iwai
  role: author
- name: Saaya Kimura
  role: author
- name: Manabu Nakaya
  role: author
  orcid: https://orcid.org/0000-0001-8483-8131
- name: Takanori Nakane
  role: author
  orcid: https://orcid.org/0000-0003-2697-2767
- name: Akihiro Kawamoto
  role: author
  orcid: https://orcid.org/0000-0002-7380-0127
- name: Genji Kurisu
  role: author
  orcid: https://orcid.org/0000-0002-5354-0807
- name: Yuta Tsuji
  role: author
  orcid: https://orcid.org/0000-0003-4224-4532
- name: Kenji Hirai
  role: author
  orcid: https://orcid.org/0000-0003-3307-3970
- name: Koji Kimoto
  role: author
  orcid: https://orcid.org/0000-0002-3927-0492
- name: Ovidiu Cretu
  role: author
  orcid: https://orcid.org/0000-0002-1822-8172
- name: Fumitaka Takeiri
  role: author
  orcid: https://orcid.org/0000-0001-9839-5669
- name: Kunihisa Sugimoto
  role: author
  orcid: https://orcid.org/0000-0002-0103-8153
- name: Benjamin Le Ouay
  role: author
  orcid: https://orcid.org/0000-0001-7053-4786
- name: Masaaki Ohba
  role: author
  orcid: https://orcid.org/0000-0001-9268-3512
- name: Ryo Ohtani
  role: author
  orcid: https://orcid.org/0000-0003-4840-3338

## Contact agent



## Publisher

organization: Wiley

## Managing organization



## Keyword

- subject: coordination polymer
  schema: not_defined
- subject: melting
  schema: not_defined
- subject: metal cyanido
  schema: not_defined

## Rights

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

## Other identifier(s)



## Data origin



## Embargo



## Journal

- title: Chemistry – A European Journal
  issn: '09476539'
  volume: '31'
  issue: '66'
  article_number: e02640

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## Instrument



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## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



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## Fileset

- id: 4926a89f-575a-4679-8162-33959ccffde2
  filename: Chemistry A European J - 2025 - Iwai - Reversible and Massive Structural
    Transformation in Meltable Cyanido‐bridged.pdf
  content_type: application/pdf
  size: 1642378
  md5: 783e76b4795e523f65b9d4306bd6164f

## Thumbnail

fileset_id: 4926a89f-575a-4679-8162-33959ccffde2
filename: Chemistry A European J - 2025 - Iwai - Reversible and Massive Structural
  Transformation in Meltable Cyanido‐bridged.pdf