Tetraazaporphyrin compounds

A compound of formula (I):

• wherein
• each A is phenyl;
• each n, independently, is 1-5;
• and
• each R1, independently, is C1-C10 alkyl, C3-C20 cycloalkyl, C3-C20 heterocycloalkyl, aryl, heteroaryl, halo, cyano, nitro, ORa, NRaRb, SiRaRbRc, COORa, OC(O)Ra, C(O)NRaRb, N(Ra)—C(O)Rb, or —SO3Ra;
• at least one R1 being at one of the two o-positions of each A;
• or
• a metal complex thereof.

A compound of formula (I):

• wherein
• each A, independently, is heteroaryl or fused aryl;
• each n, independently, is 0-3;
• and
• each R1, independently, is C1-C10 alkyl, C3-C20 cycloalkyl, C3-C20 heterocycloalkyl, aryl, heteroaryl, halo, cyano, nitro, ORa, NRaRb, SiRaRbRc, COORa, OC(O)Ra, C(O)NRaRb, N(Ra)—C(O)Rb, or SO3Ra;
• at least one R1 being at an o-position of each A:
• wherein each of Ra, Rb, and Rc, independently, is H, C1-C10 alkyl, C3-C20 cycloalkyl, C3-C20 heterocycloalkyl, aryl, or heteroaryl;
• or
• a metal complex thereof.