Chemical reaction-inspired crystal growth of a coordination polymer toward morphology design and control

Shigeyuki Masaoka, Daisuke Tanaka, Hiroyuki Kitahata, Sumiko Araki, Ryotaro Matsuda, Kenichi Yoshikawa, Kenichi Kato, Masaki Takata, Susumu Kitagawa

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


This paper reports a novel crystal growth system of a coordination framework {[Cu3(CN)3{hat-(CN)3(OEt) 3}]}n (1) (hat-(CN)3(OEt)3 = 2,6,10-tricyano-3,7,11-triethoxy-1,4,5,8,9,12-hexaazatriphenylene). The coordination polymer is crystallized through the reaction of 2,3,6,7,10,11-hexacyano-1,4,5,8,9,12-hexaazatriphenylene (hat-(CN)6), ethanol, and copper(I) complex, involving the breaking and forming of covalent bonds. The crystal morphologies obtained in the present system contain dumbbells, cogwheels, and superlattices. Moreover, in the growth perpendicular to the c-axis, periodic ramification at regular interval is observed, affording superlattice morphologies. Observation of the growth of dumbbell crystals shows that the growth rates parallel and perpendicular to the crystallographic c-axis are quite different: the former shows a drastic change with the reaction duration, while the latter is almost constant. These results are reproduced as a simple reaction-diffusion system, indicating that chemical reactions on crystal surfaces play an important role in determining the macroscopic crystal morphologies.

Original languageEnglish
Pages (from-to)15799-15808
Number of pages10
JournalJournal of the American Chemical Society
Issue number49
Publication statusPublished - 2006 Dec 13
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry


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