Magnetic Field Influence on the Crystal Structure of 2,2′:6′,2″-Terpyridine

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  • Honjo Sachi
    Depertment of Chemical Engineering, Faculty of Engineering, Iwate University
  • Yokota Masaaki
    Depertment of Chemical Engineering, Faculty of Engineering, Iwate University
  • Doki Norihito
    Depertment of Chemical Engineering, Faculty of Engineering, Iwate University
  • Shimizu Kenji
    Depertment of Chemical Engineering, Faculty of Engineering, Iwate University

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  • 2,2′:6′,2″-Terpyridine結晶構造への磁場の影響
  • 2,2':6',2"-Terpyridine結晶構造への磁場の影響
  • 2 2 6 2 Terpyridine ケッショウ コウゾウ エノ ジバ ノ エイキョウ
  • Magnetic Field Influence on the Crystal Structure of 2,2′:6′,2″-Terpyridine

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Abstract

2,2′:6′,2″-Terpyridine (terpy) is interesting photophysical molecule which exhibits long-lived phosphorescence. And more long-lived phosphorescence is expected in a solid state. Until now, two crystal structures were reported for terpy. However, details of photophysical properties of the crystals were seldom discussed. We show new method for controlling the two polymorph of terpy using magnetic-field and possibility for the development of magnetic-tunable organic phosphorescent materials is discussed.<br>Under normal conditions, the orthorhombic crystals were obtained. Under magnetic field above 5 T, however, the monoclinic crystals were precipitated. The monoclinic crystals exhibited room temperature phosphorescence. The lifetime of phosphorescence was increased with increasing magnet intensity.

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