title: Mononuclear gold(I) acetylide complexes with urea group: synthesis, characterization, photophysics, and anion sensing properties.
abstract: A series of mononuclear gold(I) acetylide complexes with urea moiety, R'(3)PAuC≡CC(6)H(4)-4-NHC(O)NHC(6)H(4)-4-R (R' = cyclohexyl, R = NO(2) (2a), CF(3) (2b), Cl (2c), H (2d), CH(3) (2e), (t)Bu (2f), OCH(3) (2g); R' = phenyl, R = NO(2) (3a), OCH(3) (3b); R' = 4-methoxyphenyl, R = H (4a), OCH(3) (4b)), have been synthesized and characterized. The crystal structures of Ph(3)PAuC≡CC(6)H(4)-4-NHC(O)NHC(6)H(4)-4-NO(2) (3a) and (4-CH(3)OC(6)H(4))(3)PAuC≡CC(6)H(4)-4-NHC(O)NHC(6)H(5) (4a) have been determined by X-ray diffraction. Complexes 2a-2g, 3b, and 4a-4b show intense luminescence both in the solid state and in degassed THF solution at 298 K. Anion binding properties of complexes 2a-2g, 3a-3b, and 4a-4b have been studied by UV-vis and (1)H NMR titration experiments. In general, the log K values of 2a-2g with the same anion in THF depend on the substituent R on the acetylide ligand of 2a-2g: R = NO(2) (2a) > CF(3) (2b) ≥ Cl (2c) > H (2d) > CH(3) (2e) ≈ (t)Bu (2f) ≥ OCH(3) (2g). Complex 2a with NO(2) group shows the dramatic color change toward F(-) in DMSO, which provides an access of naked eye detection of F(-).
authors.affiliation: MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China.
authors.forename: Yu-Peng
authors.initials: YP
authors.lastname: Zhou
authors.forename: Mei
authors.initials: M
authors.lastname: Zhang
authors.forename: Yu-Hao
authors.initials: YH
authors.lastname: Li
authors.forename: Qi-Rui
authors.initials: QR
authors.lastname: Guan
authors.forename: Fang
authors.initials: F
authors.lastname: Wang
authors.forename: Zhuo-Jia
authors.initials: ZJ
authors.lastname: Lin
authors.forename: Chi-Keung
authors.initials: CK
authors.lastname: Lam
authors.forename: Xiao-Long
authors.initials: XL
authors.lastname: Feng
authors.forename: Hsiu-Yi
authors.initials: HY
authors.lastname: Chao
mesh_terms: D002623:Chemistry Techniques, Analytical / Q000295:instrumentation*; D060326:Chemistry Techniques, Synthetic; D018360:Crystallography, X-Ray; D004121:Dimethyl Sulfoxide / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry*; D014508:Urea / Q000737:chemistry*
chemical_list: D009942:Organometallic Compounds; D006046:Gold; D014508:Urea; D004121:Dimethyl Sulfoxide