The radical intermediate, which is produced in the process of electroless nickel plating, was detected in the presence of water-soluble trap α-4-pyridy1-N-tert-buty1 nitrone（POBN） or α-phenyl-tert-buty1 nitrone（...The radical intermediate, which is produced in the process of electroless nickel plating, was detected in the presence of water-soluble trap α-4-pyridy1-N-tert-buty1 nitrone（POBN） or α-phenyl-tert-buty1 nitrone（PBN） by electron spin resonance（ESR） spectroscopy. The results obtained indicated that a 16-line（g=2.006 1, aβ<sub>C—H=1.98×10-4 T, aγ<sub>P—H=3.32×10-4 T, aN=aP=15.93×10-4 T） or a 18-line （g=2.004 9, aβ<sub>C—H=aγ<sub>P—H=2.38×10-4 T, aP=17.72×10-4 T, aN=16.20×10-4 T） ESR spectrum was observed in the process of electroless nickel plating when spin trap PBN or POBN was added. The spectra-line patterns and hyperfine coupling parameters were greatly indentical with those in the solution composed of Ti3+（0.01 mol/L）+H2O2（0.05 mol/L）+H2PO-2（0.01 mol/L）+POBN or PBN（0.01 mol/L）. Therefore, the spin adducts formed in the process of electroless nickel plating could be ascribed to the adducts belonging to HPO-·2 and POBN or PBN and it follows that the anion radical HPO-·2 was really produced from the oxidation of sodium hypophosphite in the process of electroless nickel plating.展开更多
全球首个艺术品IPO上市。近日,总部位于列支敦士登的ARTEX宣布,弗朗西斯·培根(Francis Bacon)的作品《乔治·戴尔肖像三联作》(Three Studies for a Portrait of George Dyer)于6月进行价值约5500万美元的首次公开募股(IPO),...全球首个艺术品IPO上市。近日,总部位于列支敦士登的ARTEX宣布,弗朗西斯·培根(Francis Bacon)的作品《乔治·戴尔肖像三联作》(Three Studies for a Portrait of George Dyer)于6月进行价值约5500万美元的首次公开募股(IPO),成为全球首个“艺术品IPO”上市,每股售价约为100美元,将在专业艺术品交易所ARTEX MTF进行交易。该作是1963年培根为其情人所作,在2017年的佳士得拍卖会上以接近5200万美元的价格售出,此后由私人收藏。展开更多
文摘The radical intermediate, which is produced in the process of electroless nickel plating, was detected in the presence of water-soluble trap α-4-pyridy1-N-tert-buty1 nitrone（POBN） or α-phenyl-tert-buty1 nitrone（PBN） by electron spin resonance（ESR） spectroscopy. The results obtained indicated that a 16-line（g=2.006 1, aβ<sub>C—H=1.98×10-4 T, aγ<sub>P—H=3.32×10-4 T, aN=aP=15.93×10-4 T） or a 18-line （g=2.004 9, aβ<sub>C—H=aγ<sub>P—H=2.38×10-4 T, aP=17.72×10-4 T, aN=16.20×10-4 T） ESR spectrum was observed in the process of electroless nickel plating when spin trap PBN or POBN was added. The spectra-line patterns and hyperfine coupling parameters were greatly indentical with those in the solution composed of Ti3+（0.01 mol/L）+H2O2（0.05 mol/L）+H2PO-2（0.01 mol/L）+POBN or PBN（0.01 mol/L）. Therefore, the spin adducts formed in the process of electroless nickel plating could be ascribed to the adducts belonging to HPO-·2 and POBN or PBN and it follows that the anion radical HPO-·2 was really produced from the oxidation of sodium hypophosphite in the process of electroless nickel plating.
文摘全球首个艺术品IPO上市。近日,总部位于列支敦士登的ARTEX宣布,弗朗西斯·培根(Francis Bacon)的作品《乔治·戴尔肖像三联作》(Three Studies for a Portrait of George Dyer)于6月进行价值约5500万美元的首次公开募股(IPO),成为全球首个“艺术品IPO”上市,每股售价约为100美元,将在专业艺术品交易所ARTEX MTF进行交易。该作是1963年培根为其情人所作,在2017年的佳士得拍卖会上以接近5200万美元的价格售出,此后由私人收藏。
