Reversible Mechanochromic Luminescence at Room Temperature in Cationic Platinum(II) Terpyridyl Complexes

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• 作者：Ali Han ; Pingwu Du ; Zijun Sun ; Haotian Wu ; Hongxing Jia ; Rui Zhang ; Zhenning Liang ; Rui Cao ; Richard Eisenberg
• 刊名：Inorganic Chemistry
• 出版年：2014
• 出版时间：April 7, 2014
• 年：2014
• 卷：53
• 期：7
• 页码：3338-3344
• 全文大小：348K
• 年卷期：v.53,no.7(April 7, 2014)
• ISSN：1520-510X

文摘

Reversible mechanochromic luminescence in cationic platinum(II) terpyridyl complexes is described. The complexes [Pt(Nttpy)Cl]X₂ (Nttpy = 4鈥?(p-nicotinamide-N-methylphenyl)-2,2鈥?6鈥?2鈥?terpyridine, X = PF₆ (1), SbF₆ (2), Cl (3), ClO₄ (4), OTf (5), BF₄ (6)) exhibit different colors under ambient light in the solid state, going from red to orange to yellow. All of these complexes are brightly luminescent at both room temperature and 77 K. Upon gentle grinding, the yellow complexes (4鈥?b>6) turn orange and exhibit bright red luminescence. The red luminescence can be changed back to yellow by the addition of a few drops of acetonitrile to the sample. Crystallographic studies of the yellow and red forms of complex 5 suggest that the mechanochromic response is likely the result of a change in intermolecular Pt路路路Pt distances upon grinding.