In connection with the development of the implantable biocell for a cardiac pacemaker and the sensor for an artificial pancreas, much attention has been paid to the studies of glucose electro-oxidation. However, the m...In connection with the development of the implantable biocell for a cardiac pacemaker and the sensor for an artificial pancreas, much attention has been paid to the studies of glucose electro-oxidation. However, the mechanistic aspects still remain debatable, since most of the experiments are based only on conventional electrochemical techniques and the information about the electrode reaction in molecular level is in lack. In the present note, be-展开更多
Self Assembled Monolayers(SAMs) of a series of mercapto contained azobenzene derivatives with the structure of C n H 2 n +1 AzoO(CH 2) m SH (where n =4,6,8,10,12; with m =3,5 respectively) were prepared and characteri...Self Assembled Monolayers(SAMs) of a series of mercapto contained azobenzene derivatives with the structure of C n H 2 n +1 AzoO(CH 2) m SH (where n =4,6,8,10,12; with m =3,5 respectively) were prepared and characterized.Wettability measurement of water on the SAMs demonstrates that molecular packing density in the monolayers increases while the alkyl chain in the molecules is lengthened. Both the n and m values have similar contribution to the wetting property of SAMs. The RA IR spectra reveal that the alkyl chains in the SAMs tilt away dramatically from the surface normal direction with the increase in their length. However, the orientation of azobenzene moiety is found to be influenced slightly by the alkyl chain length, which is due to the tenderness of the molecule.展开更多
The end-group dominated molecular orientation in the azobenzene self-assembled monolayers (SAMs), CnAzoC2SH (n=1-4), on gold was evaluated for the first time by grazing incidence reflection absorption FTIR spectroscop...The end-group dominated molecular orientation in the azobenzene self-assembled monolayers (SAMs), CnAzoC2SH (n=1-4), on gold was evaluated for the first time by grazing incidence reflection absorption FTIR spectroscopy (RA-FTIR). All these azobenzene SAMs have highly-organized and closely-parked structures, with the molecule tilting away gradually from surface normal direction with the increase of end group alkyl length.展开更多
A novel quinoline derivative 6-(10-thiol-decaoxy ) quinoine (abbreviated as QC10SH )was synthesized and its seif-assembled monoayers (SAMs) were prepared on gold for the first time. Wettability measurement on QC10SH S...A novel quinoline derivative 6-(10-thiol-decaoxy ) quinoine (abbreviated as QC10SH )was synthesized and its seif-assembled monoayers (SAMs) were prepared on gold for the first time. Wettability measurement on QC10SH SAM reveals a hydrophilic surface. RA-IR researches suggests that the SAM has formed highly-organized and closely-packed structure. A method is developed for quanitatively evaluating the molecular orientation in monoayer. By this method the result that the twisting and tilting angles of QC10SH moecule in SAM are 50±4° and 24±3°respectively has been obtained.展开更多
文摘In connection with the development of the implantable biocell for a cardiac pacemaker and the sensor for an artificial pancreas, much attention has been paid to the studies of glucose electro-oxidation. However, the mechanistic aspects still remain debatable, since most of the experiments are based only on conventional electrochemical techniques and the information about the electrode reaction in molecular level is in lack. In the present note, be-
基金The National Key Scientific Instrument and Equipment Development Projects(2012YQ22011902)The 863 National High Technology Research and Development Program of China(2014AA06A503)
文摘Self Assembled Monolayers(SAMs) of a series of mercapto contained azobenzene derivatives with the structure of C n H 2 n +1 AzoO(CH 2) m SH (where n =4,6,8,10,12; with m =3,5 respectively) were prepared and characterized.Wettability measurement of water on the SAMs demonstrates that molecular packing density in the monolayers increases while the alkyl chain in the molecules is lengthened. Both the n and m values have similar contribution to the wetting property of SAMs. The RA IR spectra reveal that the alkyl chains in the SAMs tilt away dramatically from the surface normal direction with the increase in their length. However, the orientation of azobenzene moiety is found to be influenced slightly by the alkyl chain length, which is due to the tenderness of the molecule.
文摘The end-group dominated molecular orientation in the azobenzene self-assembled monolayers (SAMs), CnAzoC2SH (n=1-4), on gold was evaluated for the first time by grazing incidence reflection absorption FTIR spectroscopy (RA-FTIR). All these azobenzene SAMs have highly-organized and closely-parked structures, with the molecule tilting away gradually from surface normal direction with the increase of end group alkyl length.
文摘A novel quinoline derivative 6-(10-thiol-decaoxy ) quinoine (abbreviated as QC10SH )was synthesized and its seif-assembled monoayers (SAMs) were prepared on gold for the first time. Wettability measurement on QC10SH SAM reveals a hydrophilic surface. RA-IR researches suggests that the SAM has formed highly-organized and closely-packed structure. A method is developed for quanitatively evaluating the molecular orientation in monoayer. By this method the result that the twisting and tilting angles of QC10SH moecule in SAM are 50±4° and 24±3°respectively has been obtained.
