Role of molecular strain on the solid-state synthesis of coordination compounds from iron(II) chloride tetrahydrate and 1,10-phenanthroline under mechanical stress

Tadashi Ohshita, Daisuke Nakajima, Atsushi Tsukamoto, Naoko Tsuchiya, Tetsuhiko Isobe, Mamoru Senna, Naoki Yoshioka, Hidenari Inoue

Research output: Contribution to journalArticle

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Abstract

A powdered crystalline mixture of iron(II) chloride tetrahydrate (FeCl2·4H2O) and 1,10-phenanthroline (phen) was subjected to mechanical stressing in Ar by a planetary ball-mill. By milling for 3h, the mixture turned completely non-crystalline. New IR absorption bands appeared simultaneously at 358cm-1 due to Fe-N(phen) stretching and at 207cm-1 due to N-Fe-N(phen) bending for [Fe(phen)3]2+. Only a doublet peak due to [Fe(phen)3]Cl2·nH2O was detected in the Mössbauer spectrum. All these results indicate consistently the formation of [Fe(phen)3]Cl2·nH2O by milling with an almost quantitative yield. Disproportionation of the hydrated water molecules was observed after milling FeCl2·4H2O alone for 3h. The molecular strain triggers a solid-state exchange reaction between H2O and phen at the contact point of two dissimilar solid particles under mechanical stressing, and promotes formation of [Fe(phen)3]Cl2·nH2O in the solid state.

Original languageEnglish
Pages (from-to)91-101
Number of pages11
JournalAnnales de Chimie: Science des Materiaux
Volume27
Issue number6
DOIs
Publication statusPublished - 2002 Nov

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Iron Compounds
Phenanthrolines
Chlorides
Iron
Ball mills
Point contacts
Stretching
Absorption spectra
Crystalline materials
Molecules
1,10-phenanthroline
Water

ASJC Scopus subject areas

  • Materials Chemistry

Cite this

Role of molecular strain on the solid-state synthesis of coordination compounds from iron(II) chloride tetrahydrate and 1,10-phenanthroline under mechanical stress. / Ohshita, Tadashi; Nakajima, Daisuke; Tsukamoto, Atsushi; Tsuchiya, Naoko; Isobe, Tetsuhiko; Senna, Mamoru; Yoshioka, Naoki; Inoue, Hidenari.

In: Annales de Chimie: Science des Materiaux, Vol. 27, No. 6, 11.2002, p. 91-101.

Research output: Contribution to journalArticle

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AU - Tsukamoto, Atsushi

AU - Tsuchiya, Naoko

AU - Isobe, Tetsuhiko

AU - Senna, Mamoru

AU - Yoshioka, Naoki

AU - Inoue, Hidenari

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