Negative Thermal Expansion of Undulating Coordination Layers through Interlayer Interaction

Ryo Ohtani, Junichi Yanagisawa, Yuudai Iwai, Benjamin Le Ouay, Masaaki Ohba

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The negative thermal expansion (NTE) of solid-state materials is of significance in various fields, but a very rare phenomenon. In this study, we carried out a meta-analysis for the anisotropic thermal expansion behavior of fifteen two-dimensional coordination polymers [M(salen)]2[M′(CN)4(solvent)] (M = Mn, Fe; M′ = MnN, ReN, Pt, Pt(I2)x; x = 0.18, 0.45, 0.85, 1.0; solvent = H2O, MeOH, MeCN) with a newly synthesized [Fe(salen)]2[MnN(CN)4(MeCN)]. Consequently, we successfully demonstrate the unusual NTE of the undulating coordination layers by an expansion deformation of the layers via strong interlayer interaction within the layer stacking. Notably, the layer volume of [Mn(salen)]2[ReN(CN)4] with its powder form decreases with a large NTE coefficient, αlayer-volume= -27 × 10-6K-1(100-500 K). This is a significantly large value despite the increase in layer thickness along the layer contraction based on the anisotropic transformation of undulating layers.

Original languageEnglish
Pages (from-to)21123-21130
Number of pages8
JournalInorganic chemistry
Issue number51
Publication statusPublished - Dec 26 2022

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry


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