The photo-induced commensurate modulated structure in site-selective spin crossover complex trans-[Fe(abpt)2(NCS)2]

Che Hsiu Shih, Chou Fu Sheu, Kenichi Kato, Kunihisa Sugimoto, Jungeun Kim, Yu Wang, Masaki Takata

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20 Citations (Scopus)

Abstract

The photo-induced superstructure of polymorph C of trans-[Fe(abpt) 2(NCS)2] (abpt = 4-amino-3,5-bis(pyridin-2-yl)-1,2,4- triazole) is discovered as a commensurate modulated structure by single-crystal X-ray diffraction under irradiation. The crystal structure at 25 K before the photo-irradiation composed of two crystallographically independent iron molecules, one of which exhibits high spin (HS) state and the other at low spin (LS) state. Under green laser light (λ = 532 nm) irradiation, the LS molecule (Fe1) is found to be excited to a metastable HS state and gives rise to a commensurate tripled superstructure along the c axis. In addition, it is confirmed that this modulation persists until the HS → LS relaxation temperature beyond 52 K. Our structural findings suggest that the structural modulation and the site-selective LS → HS excitation are highly correlated.

Original languageEnglish
Pages (from-to)9794-9800
Number of pages7
JournalDalton Transactions
Volume39
Issue number41
DOIs
Publication statusPublished - 2010 Nov 7
Externally publishedYes

ASJC Scopus subject areas

  • Inorganic Chemistry

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