Patent ID: 7326474

Claim:
A luminescent spiro-dimer of the following chemical formula, wherein, the linking group K is in which n can be the same or different, and is an integer of 0 to 6, and the linking group K includes at least one group, or the linking group K is in which n can be the same or different, and is an integer of 0 to 4; R can be the same or different, and is H, halogen, CN, CO 2 R*, OR*, NR* 2 , SR*, substituted or non-substituted alkyl group containing from 1 to 4 carbon atoms, substituted or non-substituted aryl or heteroaryl group containing from 4 to 24 carbon atoms, substituted or non-substituted heterocyclic group containing from 4 to 24 carbon atoms, or substituted or non-substituted fused ring group containing from 4 to 24 carbon atoms; and R* can be the same or different, and is H, halogen, substituted or non-substituted alkyl or alkenyl containing from 1 to 6 carbon atoms, substituted or non-substituted aryl or heteroaryl group containing from 4 to 24 carbon atoms, or substituted or non-substituted heterocyclic group containing from 4 to 24 carbon atoms.