Electrochromic devices having a buffer system

A compound represented by the structure of Formula (I), or a salt thereof:

• wherein:
• R1, R2, R3, R4, R5, R6, R7, and R8 are each independently a substituted or unsubstituted C1-C10 alkyl group;
• each L is independently a substituted or unsubstituted C1-C20 alkylene group;
• and
• R9 and R10 are each independently substituted or unsubstituted C1-C20 alkyl group, substituted or unsubstituted C2-C20 alkenyl group, substituted or unsubstituted C2-C20 alkynyl group, substituted or unsubstituted C3-C10 cycloalkyl group, substituted or unsubstituted aryl group, and substituted or unsubstituted heteroaryl group.