Organic electro-optic chromophores

A compound of Formula A2:

• wherein:
• A is a π-electron acceptor group;
• X is:
• L is absent or L is S or O;
• Y is H, optionally substituted C1-C20 alkyl, optionally substituted C3-C50 heteroalkyl, optionally substituted C3-C10 cycloalkyl, optionally substituted C3-C10 cycloheteroalkyl;
• n is 1, 2, or 3;
• m is 1, 2, or 3, and
• R5 and R6 are independently H, optionally substituted C1-C10 alkyl, optionally substituted C3-C10 heteroalkyl, optionally substituted C3-C10 cycloalkyl, or optionally substituted C3-C10 cycloheteroalkyl;
• Q is
• J, at each occasion, is independently S, O, or NR8;
• R8 is H, optionally substituted C1-C10 alkyl, optionally substituted C3-C10 heteroalkyl, optionally substituted C3-C10 cycloalkyl, optionally substituted C3-C10 cycloheteroalkyl, optionally substituted C6-C10 aryl, or optionally substituted C5-C10 heteroaryl;
• and
• R1 and R2 are independently H, optionally substituted C1-C10 alkyl, optionally substituted C3-C10 heteroalkyl, optionally substituted C3-C10 cycloalkyl, or optionally substituted C3-C10 cycloheteroalkyl;
• R7 is H, optionally substituted C1-C10 alkyl, optionally substituted C3-C10 heteroalkyl, optionally substituted C3-C10 cycloalkyl, or optionally substituted C3-C10 cycloheteroalkyl, optionally substituted C1-C10 alkyloxy, optionally substituted C3-C10 heteroalkyloxy, or NR3R4;
• and
• R3 and R4 are independently H, optionally substituted C1-C10 alkyl, optionally substituted C3-C10 heteroalkyl, optionally substituted C3-C10 cycloalkyl, or optionally substituted C3-C10 cycloheteroalkyl.