2,3,5,6-Tetrachloride-quinone was anchored to a gold surfare through the self-assem-bled monolayers of dithiol [DT HS-(CH2).-SH n=2,4,6,8,10]. The surface coverage of the anchoredTQ was esteminated to be 4.0 ×10-...2,3,5,6-Tetrachloride-quinone was anchored to a gold surfare through the self-assem-bled monolayers of dithiol [DT HS-(CH2).-SH n=2,4,6,8,10]. The surface coverage of the anchoredTQ was esteminated to be 4.0 ×10-11 mol’cm-2. The electron transfer rate constant Ket associatedwith the redox process of anchored film decreased from 6.75 s-1 at n=2 to 0.169 s-1 at n=10 withincreasing the chain length of the DT SAMs througth the redox potential of TQ. The turnningbarrier conefficient.(β) of the electron transfer was estimated to be 0.82A-1 from the observed linearrelationship between the Ket and the monolayer chain length.展开更多
Self assembled monolayers(SAMs) of mercapto methoxy poly(ethylene glycol)(MPEG) on gold electrode surface was formed. The SAMs of MPEG had molecular recognition characteristics. The iodine ions could permeate through ...Self assembled monolayers(SAMs) of mercapto methoxy poly(ethylene glycol)(MPEG) on gold electrode surface was formed. The SAMs of MPEG had molecular recognition characteristics. The iodine ions could permeate through the SAM layer to approach the electrode surface. This MPEG film electrode can be used to detect iodine ions with lower interference.展开更多
文摘2,3,5,6-Tetrachloride-quinone was anchored to a gold surfare through the self-assem-bled monolayers of dithiol [DT HS-(CH2).-SH n=2,4,6,8,10]. The surface coverage of the anchoredTQ was esteminated to be 4.0 ×10-11 mol’cm-2. The electron transfer rate constant Ket associatedwith the redox process of anchored film decreased from 6.75 s-1 at n=2 to 0.169 s-1 at n=10 withincreasing the chain length of the DT SAMs througth the redox potential of TQ. The turnningbarrier conefficient.(β) of the electron transfer was estimated to be 0.82A-1 from the observed linearrelationship between the Ket and the monolayer chain length.
文摘Self assembled monolayers(SAMs) of mercapto methoxy poly(ethylene glycol)(MPEG) on gold electrode surface was formed. The SAMs of MPEG had molecular recognition characteristics. The iodine ions could permeate through the SAM layer to approach the electrode surface. This MPEG film electrode can be used to detect iodine ions with lower interference.
