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US 11,261,374 B2Granted
Squarylium compound, light-emitting composition, and light-emitting film
AssigneeKonica Minolta, Inc.
InventorRyutaro Sugawara
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Abstract
The present invention addresses the issue of providing: a novel squarylium compound that has high light-emission efficiency, in particular little reduction in light-emission efficiency in a solid membrane, and is capable of emitting a near-infrared light having excellent light resistance; and a light-emitting composition and a light-emitting film that contain said squarylium compound. This squarylium compound is characterized by having a structure indicated by general formula (1).
Claims6
A squarylium compound having a structure represented by Formula (1),
- in Formula (1), a ring A and a ring B each respectively represent an aromatic hydrocarbon ring which may have a substituent;
- R1 represents an alkyl group, a cycloalkyl group, an aromatic hydrocarbon group, or a halogen atom;
- R2 and R3 each respectively represent an alkyl group or a cycloalkyl group;
- R represents a substituent;
- R1 and R, or two Rs may be combined with each other to form a ring;
- R4 and R5 each respectively represent a hydroxy group or an amino group;
- and n1 and n2 each respectively represent an integer of 0 to 4.
4 more elements
Dependencies are inferred from the claim text.