Search

Although supertetrahedral Tn sulfide clusters (n=2–6) have been extensively explored, the synthesis of Tn selenide clusters with n>4 has not been achieved thus far. Reported here are ionic‐liquid (IL)‐assisted precursor route syntheses, characterizations, and the photocatalytic properties of six new M‐In‐Q (M=Cu or Cd; Q=Se or Se/S) chalcogenide compounds, namely [Bmmim]12Cu5In30Q52Cl3(Im) (Q=Se (T5‐1), Se48.5S3.5 (T5‐2); Bmmim=1‐butyl‐2,3‐dimethylimidazolium, Im=imidazole), [Bmmim]11Cd6In28Q52Cl3(MIm) (Q=Se (T5‐3), Se28.5S23.5 (T5‐4), Se16S36 (T5‐5); MIm=1‐methylimidazole), and [Bmmim]9Cd6In28Se8S44Cl(MIm)3 (T5‐6). The cluster compounds T5‐1 and T5‐3 represent the largest molecular supertetrahedral Tn selenide clusters to date. Under visible‐light illumination, the Cu‐In‐Q compounds showed photocatalytic activity towards the decomposition of crystal violet, whereas the Cd‐In‐Q compounds exhibited good photocatalytic H2 evolution activity. Interestingly, the experimental results show that the photocatalytic performances of the selenide/sulfide solid solutions were significantly better than those of their selenide analogues, for example, the degradation time of the organic dye with T5‐2 was much shorter than that with T5‐1, whereas the photocatalytic H2 evolution efficiencies with T5‐3–T5‐6 improved significantly with increasing sulfur content. This work highlights the significance of IL‐assisted precursor route synthesis and the tuning of photocatalytic properties through the formation of solid solutions. [ABSTRACT FROM AUTHOR]

A novel NHC–Pd complex of 1,3‐bis (4‐ethoxycarbonylphenyl) imidazolium chloride has been synthesized and characterized by 1H NMR, 13C NMR, IR and X‐ray single‐crystal diffraction studies. TG analysis shows that the NHC‐Pd complex is stable under 208 °C. The catalytic activities have been explored for the synthesis of axially chiral N‐(2′‐methoxy‐1,1′‐binaphthalen‐2‐yl) benzophenone hydrazone. The result indicates that the novel NHC‐Pd complex can achieve better catalytic activity than the Pd‐phosphine catalysts in the synthesis of axially chiral N‐(2′‐methoxy‐1,1′‐binaphthalen‐2‐yl) benzophenone hydrazone. [ABSTRACT FROM AUTHOR]