Chem. J. Chinese Universities ›› 2016, Vol. 37 ›› Issue (5): 938.doi: 10.7503/cjcu20150943
• Physical Chemistry • Previous Articles Next Articles
YAO Huiqin1,*(
), HUANG Shan1, SU Qiaoling1, SHI Keren2,*, GAN Qianqian1, WANG Mingke1
Received:2015-12-10
Online:2016-05-10
Published:2016-04-22
Contact:
YAO Huiqin,SHI Keren
E-mail:huiqin_yao@163.com
CLC Number:
TrendMD:
YAO Huiqin, HUANG Shan, SU Qiaoling, SHI Keren, GAN Qianqian, WANG Mingke. Loading of Myoglobin into Layer-by-layer Films Assembled Through Boronic Acid-diol Specific Recognition and Its Electrochemical Study†[J]. Chem. J. Chinese Universities, 2016, 37(5): 938.
Scheme 1 Synthetic route of PAA-PBA
Fig.1 CVs of 1.0 mmol/L Fe(CN)63- at a scan rate of 0.1 V/s in pH=7.0 buffers at bare PG electrode(a), PG/CS film electrode(b) and PG/CS/{PAA-PBA/Dex}n film electrodes with n=1—7(c—h)
Fig.2 EIS responses of bare PG(a), PG/CS film(b), PG/CS {PAA-PBA/Dex}6 film(c) and PG/CS{PAA-PBA/Dex}6-Mb film(d) at 0.17 V in pH=7.0 buffers containing 5.0 mmol/L Fe(CN)3-/4-(A) and magnification of curves a and b of (A) (B)
Fig.3 CVs in pH=7.0 buffers at a scan rate of 0.2 V/s for {PAA-PBA/Dex}6-Mb film after {PAA-PBA/Dex}6 film was immersed in 1 mg/mL Mb solutions at pH=5.0 for different time(A) and effect of the immersing time in Mb solution on reduction peak currents of electroactive Mb(Ipc) for {PAA-PBA/Dex}6-Mb film(B)(A) t/h: a. 0; b. 0.5; c. 1.0; d. 2.0; e. 3.0; f. 4.0; g. 5.0; h. 6.0; i. 7.0; j. 9.0; k. 15.0.
Fig.4 Effect of different number of bilayers(n) on the surface concentration of electroactive Mb(Γ*) after {PAA-PBA/Dex}n films were immersed in 1 mg/mL Mb solutions for 9 h
Fig.5 CVs at a scan rate of 0.2 V/s for {PAA-PBA/Dex}6-Mb films in pH=7.0 buffersa. The first cycle; b. after 200 cycles; c. after the films were immersed in pH=7.0 buffers for 7 d.
Fig.6 SEM top views of {PAA-PBA/Dex}6(A), {PAA-PBA/Dex}6/PAA-PBA(B) and {PAA-PBA/Dex}6-Mb films(C) assembled on PG/CS surface
Fig.7 CVs of {PAA-PBA/Dex}6-Mb films at a scan rate of 0.2 V/s in buffers at different pHpH: a. 4.0; b. 6.0; c. 7.0; d. 8.5. Inset: influence of pH of testing solutions on the formal potential(E°') estimated by CV at a scan rate of 0.2 V/s for {PAA-PBA/Dex}6-Mb film.
Fig.8 CVs at before and after different volume of air was injected 0.2 V/s for {PAA-PBA/Dex}6-Mb films in pH=7.0 buffers containing 0.1 mol/L different supporting electrolytesa. NaCl; b. KCl; c. NaBr.
Fig.9 CVs at 0.2 V/s in 10 mL of pH=7.0 buffers for {PAA-PBA/Dex}6(a), {PAA-PBA/Dex}6-Mb films before(b) and {PAA-PBA}6-Mb films(c—j) after different volume of air was injectedV(air)/nL: b. 60; c. 50; d. 10; e. 15; f. 20; g. 30; h. 40; i. 60; j. 90.
Fig.10 CVs at a scan rate of 0.2 V/s for {PAA-PBA/Dex}6 films in buffers(pH=7) containing 100 μmol/L H2O2(a), {PAA-PBA/Dex}6-Mb films(b), {PAA-PBA/Dex}6-Mb films with 20(c), 40(d), 60(e), 80(f), 100(g) and 150 μmol/L(h) H2O2 in pH=7.0 buffers, respectively(A) and dependence of CV Ipc on the concentration of H2O2 for {PAA-PBA/Dex}6-Mb film at 0.2 V/s(B)
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