Mononuclear Gold(I) Acetylide Complexes with Urea Group: Synthesis, Characterization, Photophysics, and Anion Sensing Properties

详细信息    查看全文

• 作者：Yu-Peng Zhou ; Mei Zhang ; Yu-Hao Li ; Qi-Rui Guan ; Fang Wang ; Zhuo-Jia Lin ; Chi-Keung Lam ; Xiao-Long Feng ; Hsiu-Yi Chao
• 刊名：Inorganic Chemistry
• 出版年：2012
• 出版时间：May 7, 2012
• 年：2012
• 卷：51
• 期：9
• 页码：5099-5109
• 全文大小：539K
• 年卷期：v.51,no.9(May 7, 2012)
• ISSN：1520-510X

文摘

A series of mononuclear gold(I) acetylide complexes with urea moiety, R鈥?sub>3PAuC鈮C₆H₄-4-NHC(O)NHC₆H₄-4-R (R鈥?= cyclohexyl, R = NO₂ (2a), CF₃ (2b), Cl (2c), H (2d), CH₃ (2e), ^tBu (2f), OCH₃ (2g); R鈥?= phenyl, R = NO₂ (3a), OCH₃ (3b); R鈥?= 4-methoxyphenyl, R = H (4a), OCH₃ (4b)), have been synthesized and characterized. The crystal structures of Ph₃PAuC鈮C₆H₄-4-NHC(O)NHC₆H₄-4-NO₂ (3a) and (4-CH₃OC₆H₄)₃PAuC鈮C₆H₄-4-NHC(O)NHC₆H₅ (4a) have been determined by X-ray diffraction. Complexes 2a鈥?b>2g, 3b, and 4a鈥?b>4b show intense luminescence both in the solid state and in degassed THF solution at 298 K. Anion binding properties of complexes 2a鈥?b>2g, 3a鈥?b>3b, and 4a鈥?b>4b have been studied by UV鈥搗is and ¹H NMR titration experiments. In general, the log K values of 2a鈥?b>2g with the same anion in THF depend on the substituent R on the acetylide ligand of 2a鈥?b>2g: R = NO₂ (2a) > CF₃ (2b) 鈮?Cl (2c) > H (2d) > CH₃ (2e) 鈮?^tBu (2f) 鈮?OCH₃ (2g). Complex 2a with NO₂ group shows the dramatic color change toward F^{鈥?/sup> in DMSO, which provides an access of naked eye detection of F鈥?/sup>.}