Supporting Information Electrochemiluminescence for Electric-Driven Antibacterial Therapeutics Shanshan Liu, a,b Huanxiang Yuan, a Haotian Bai, a Pengbo Zhang, a Fengting Lv, a Libing Liu, a Zhihui Dai, b* Jianchun Bao, b Shu Wang a* a Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China. E-mail: wangshu@iccas.ac.cn b School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, P. R. China Email: daizhihuii@njnu.edu.cn S1
Scheme S1. Reaction mechanism proposed for the ECL of luminol in the presence of H 2 O 2. S2
Scheme S2. The energy level diagram for the production of reactive oxygen species. When ground-state OPV absorb energy from ECL, the transition from ground-state S 0 to singlet excited state S 1 will occurs. Then, one part of the singlet excited state transits to triplet excited state T 1 through intersystem crossing. Energy transfer from T 1 to ground-state molecular oxygen ( 3 O 2 ) sensitizes the production of 1 O 2. Another part of the singlet excited state reacts with ground-state molecular oxygen ( 3 O 2 ) to produce other ROS (O 2, OH, etc.). S3
Figure S1. CV curve and ECL-potential curve of L-H 2 O 2 (A), L-H 2 O 2 -OPV (B), L-H 2 O 2 -porphyrin (C), OPV (D) and porphyrin (E) solution during a continuous potential scan from 0.2 and 0.6 V to the ECL response of the L-H 2 O 2 solution under a continuous cyclic potential scan from 0.2 to 0.6 V for 400 s at 100 mv s -1. The emission window was placed in front of the photomultiplier tube, which was biased at 600 V. S4
Figure S2. Absorption spectra of porphyrin and OPV in the water with a concentration of 15 µm. Table S1. The ζ potential of pathogenic bacteria upon the addition of OPV and porphyrin. S5
Figure S3. (A-C) Fluorescence spectra of DCFH in different ECL systems with various concentrations of photosensitizers (0-1.0 µm). (D, E) Fluorescence spectra of DCFH in different ECL systems upon different electrifying time (0-5 min). S6
Figure S4. Confocal laser scanning microscopy (CLSM) images of E.coli, S.aureus and C.albicans incubated with OPV. Figure S5. Antibacterial rate at various concentration of (A) luminol (0.2-1.0 mm) and (B) OPV (0.3-1.2 µm). The concentration of OPV in A is 1.0 µm and luminol in B is 0.2 mm. S7
Table S2. Statistical data for antibacterial activities of various ECL-therapeutics systems. Standard deviation (σ Figure S6. (A) Plate photographs for S. aureus on LB agar plate treated with photosensitizer in the absence and presence of ECL system. (B) Bactericidal activity of photosensitizer to S. aureus in the absence and presence of ECL system. S8
Figure S7. (A) Plate photographs for C. albicans on LB agar plate treated with photosensitizer in the absence and presence of ECL system. (B) Bactericidal activity of photosensitizer to C. albicans in the absence and presence of ECL system. Figure S8. Colony forming units (CFU) for E. coli (A), S. aureus (B) and C. albicans (C) treated with luminol as well as the blank group on LB agar plate. S9
Figure S9. Fluorescence spectra of DCF in different hydrogel system. (a) DCFH, (b) untreated hydrogel, (c) charged hydrogel, (d) charged hydrogel with luminol, (e) charged hydrogel with luminol and OPV. Table S3. Statistical data for Antibacterial activities in various charged hydrogel system. S10
Figure S10. The morphology sketches (A) and photo (B) of detection cell. S11
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