Figure 9:(a,b) Cyclic voltammograms; (c,d) profiles of electrogenerated chemiluminescence. Detection conditions: (a) 5 mmol L–1 Ru(bpy)3C12 + 50 mmol L–1 PBS (pH7.4), scan rate: 100 mV s–1; (b) 5 mmol L–1 Ru(bpy)2(dcbpy)NHS + 50 mmol L–1 PBS (pH7.4), scan rate: 100 mV s–1; (c) 5 mmol L–1 Ru(bpy)3C12 + 50 mmol L–1 PBS (pH7.4), scan rate: 100 mV s–1; (d) 5 mmol L–1 Ru(bpy)2(dcbpy)NHS + 50 mmol L–1 PBS (pH7.4), scan rate: 100 mV s–1.