A New Class of Platinum(II) Vapochromic Salts

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• 作者：Levi J. Grove ; Jeffrey M. Rennekamp ; Hershel Jude ; and William B. Connick
• 刊名：Journal of the American Chemical Society
• 出版年：2004
• 出版时间：February 18, 2004
• 年：2004
• 卷：126
• 期：6
• 页码：1594 - 1595
• 全文大小：97K
• 年卷期：v.126,no.6(February 18, 2004)
• ISSN：1520-5126

文摘

Luminescent chloride and hexaflurophosphate salts of Pt(Me₂bzimpy)Cl⁺ (Me₂bzimpy = 2,6-bis(1-methylbenzimidazol-2-yl)pyridine) are reported. As solids, both compounds are vapochromic, undergoing pronounced and reversible changes of color and emission in the presence of volatile organic compounds. The chloride salt responds to vapors of methanol, chloroform, ethanol, and acetonitrile, undergoing a distinct change in color from yellow to red within seconds. The PF₆^- salt responded selectively to acetonitrile vapor, changing from yellow to violet while sorbing 1.0 ± 0.1 equiv. For either salt, leaving vapor-exposed samples in air for several days or heating for several minutes restored the original color. UV-visible absorption spectra and solid-state room temperature and 77 K emission spectra are reported, and the accumulated data are consistent with a decrease in Pt···Pt separation accompanying vapor sorption.