Citation: SONG Yang, SUN Hai-Xia, WANG Yan, LIU Hong-Ke. Synthesis, Characterization and Fluorescence Properties of Macrocyclic Gold(Ⅰ) Complexes with Flexible Bisimidazolate-Containing Ligands[J]. Chinese Journal of Inorganic Chemistry, ;2019, 35(12): 2269-2274. doi: 10.11862/CJIC.2019.220 shu

Synthesis, Characterization and Fluorescence Properties of Macrocyclic Gold(Ⅰ) Complexes with Flexible Bisimidazolate-Containing Ligands

SONG Yang ¹ ,
SUN Hai-Xia ² ,
WANG Yan ^1,, ,
LIU Hong-Ke ^2,,

1.
Anhui Province Key Laboratory of Optoelectronic and Magnetism Functional Materials, Key Laboratory of Functional Coordination Compounds of Anhui Higher Education Institutes, Anqing Normal University, Anqing, Anhui 246011, China
2.
School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China

Corresponding author: WANG Yan, njwangy@126.com LIU Hong-Ke, liuhongke@njnu.edu.cn
Received Date: 29 May 2019
Revised Date: 29 August 2019

Figures(4)

Two novel cyclic Au(Ⅰ) complexes based on flexible bisimidazole-containing ligand, namely, [Au₂(m-bitmb)₂] [AuCl₂]Cl·2CH₃OH (1) and[Au₂(m-bitmb)₂] [AuCl₂]2·2CH₃CN (2) (m-bitmb=1, 3-bis(imidazol-1-ylmethyl)-2, 4, 6-trimethylbenzene), respectively, were obtained by diffusion method, which were further characterized by X-ray single crystal diffraction, elemental analysis, XRD and fluorescence spectroscopy. Complex 1 crystallizes in space group P2/c with a=0.895 6(9) nm, b=1.129 0(12) nm, c=2.166 3(2) nm, β=91.934(19)°, V=2.182 1(4) nm³, Z=2, D_c=2.012 g·cm^-3, F(000)=1 248, the final R=0.036 6, wR=0.091 0. Complex 2 crystallizes in space group P1 with a=0.847 16(13) nm, b=1.168 82(17) nm, c=1.183 72(17) nm, α=97.132 0(10)°, β=96.872(2)°, γ=95.391(2)°, V=1.147 6(3) nm³, Z=1, D_c=2.275 g·cm^-3, F(000)=728, the final R=0.038 1, wR=0.087 8. Both the title complexes have similar cyclic M₂L₂ structural units. The m-bitmb in 1 and 2 all adopt cis-conformation to coordinate to Au(Ⅰ) centers. The cyclic units in 1 and 2 are regularly arranged through π-π stacking interaction to form one-dimensional chain structures. Complex 1 has stronger π-π stacking effect than 2, but its aurophility is slightly weaker. The structural diversities of title complexes may be caused by the different solvents used in the synthesis process. Fluorescence results show that the aurophilic interactions in title complexes play important roles on their fluorescence properties.
- crystal structure,
- Au(Ⅰ) complex,
- aurophility,
- π-π stacking,
- luminescence
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