Synthesis, characterization and X-ray crystallography of a metallacrown ether complex containing a RuII(bpy)22+ chromophore and its Mo(CO)4 analog
摘要:
The chelating ligand (2,2'-Cl2H8O2)P(CH2CH2O)(4)P(2,2'-O2Cl2H8) reacts with both Ru(bPY)(2)(O3SCF3)(2) and MO(CO)(4)(C7H8) to form the new metallacrown ether complexes cis-[Ru(bPY)(2)((2,2'-C12H8O2)P(CH2CH2O)(4)P(2,2'-O2Cl2H8))](O3SCF3)(2) (1) and cis-[MO(CO)(4)((2,2'-C12H8O2)P(CH2CH2O)(4)P(2,2'-O2Cl2H8))] (2). The X-ray crystal structures for both complexes indicate that the metallacrown ether ring oxygen atoms point their lone pairs towards the cavity in the cis-metallacrown ether ring. The effect of interactions of the metallacrown ether complex with selected monoatomic cations (Li+, Na+ and Hg2+) on the emissive properties of the Ru(bPY)(2)(2+) chromophore were studied by steady-state and time-dependent emission spectroscopy. Our results suggest that complex 1 interacts weakly with Li+, Na+ and Hg2+, and subtle changes are observed in its photophysical properties. These changes are discussed in terms of excited-state parameters obtained from a Franck-Condon analysis of the emission spectra. (C) 2004 Elsevier Ltd. All rights reserved.
合成了一种新的金属环醚,顺式-PdCl 2 {(2,2'-C 12 H 8 O 2)P(OCH 2 CH 2)4 OP(2,2'-O 2 H 8 C 12)}并通过NMR光谱学和X射线晶体学进行了全面表征。一种新的合成方法和完整的NMR表征,用于先前报道并密切相关的顺式-Mo(CO)4(2,2'-C 12 H 8 O 2)P(OCH 2 CH 2)4 OP(2,2'- Ò 2 ħ还报道了8 C 12)金属催眠醚。两种络合物均为单体,在溶液和固态下均显示出顺式配位几何,顺式-Mo(CO)4(2,2'-C 12 H 8 O 2)P(OCH 2 CH 2)4 OP(在HgCl 2的存在下,2,2'-O 2 H 8 C 12)金属催眠醚似乎未经历顺式-反式异构化。这些结果令人惊讶,因为密切相关的PdCl 2(Ph 2 P(CH 2 CH 2 O)n CH 2 CH 2 PPh 2)( n = 3-