Biomedical subjects

Xiang-qin Lin

Publications and source records attributed to Xiang-qin Lin.

3 recordsLinked to original sources

PubMed2003

Electrochromatography with a 2.7 mm inner diameter monolithic column.

Monolithic columns of 2.7 mm I.D. have been prepared and used in electrochromatography (EC) separation. Although capillary electrochromatography (CEC) has higher separation efficiency, it displays some shortcomings, such as limited sample loadability and restricted concentration detectability etc. In this paper, we investigate the feasibility of EC separation with millimeter diameter monolithic columns. By using a designed preparation method of monolithic column packed with about 150 microm quartz sand, the effect of Joule heating can be reduced, and the processes of frit making and column packing can be avoided. The concentration detectability of the EC is improved comparing with that of CEC. Moreover, the separation efficiency of 52,000 plates/m was achieved with a 70 mm length and 2.7 mm I.D. monolithic column.

Chromatography, Micellar Electrokinetic Capillary↗

PubMed2003

[Study on S-benzyl-N-(ferrocenyl-1-methyl-metylidene)-dithiocarbazate nickel (II)/cobalt (II) complexes by in-situ FTIR spectroelectrochemistry].

Comparative studies were carried out by using electrochemistry and in-situ FTIR spectroelectrochemistry for nonlinear optical complexes, S-benzyl-N-(ferrocenyl-1-methyl-metylidene)-dithiocarbazate nickel (II)/cobalt (II) complexes (Ni(LSB)2/Co (LSB)2). The results indicated that Ni(LSB)2 involves two consecutive reversible one-electron oxidation steps, while Co(LSB)2 involves only one two-electron oxidation step. Ni(LSB)2 complex that has a square planar configuration exhibits a moderately strong electronic communication between the two-ferrocene moieties, taking place through the skeleton chain of the ligand due to the extensive electron delocalization in the whole molecule and leads to the appearance of a strong nu c-c vibration band at 1,453 cm-1 during the oxidation process, while Co(LSB)2 complex that has a tetrahedral configuration shows low electron delocalization and has two almost identical ferrocene moieties.

English Abstract↗

PubMed2003

[In-situ FTIR study of hybrid copper-cobalt hexacyanoferrate film modified electrode].

The study on the in-situ FTIR spectroelectrochemistry of a hybrid copper-cobalt hexacyanoferrate film modified platinum electrode was carried out. The variation of the FTIR spectra was well correlated to the redox process of CuCoHCF. The relative contribution of Cu(II) and Co(II) to the stretching vibration of CN was found to vary with the applied potential.

Cobalt↗