Patent Number: 8,877,315

Title: Indolium compound and optical recording material containing the same

Abstract: A novel indolium compound of general formula (I) and an optical recording material containing the indolium compound. ##STR00001## In formula (I), ring A is a benzene ring, etc.; ring B is a 5- or 6-membered heterocyclic ring; R.sup.1 is a group of general formula (II), etc.; R.sup.2 is an organic group having 1 to 30 carbon atoms, etc.; Y.sup.1 is an alkyl group having 1 to 10 carbon atoms, etc.; Z.sup.1 and Z.sup.2 are each, e.g., an alkyl group having 1 to 8 carbon atoms optionally substituted with a halogen atom and optionally interrupted by --O--, etc.; a is an integer of 0 to 6; b is an integer of 0 to 5; An.sup.q- is a q-valent anion; q is 1 or 2; and p is a number necessary to neutralize an electric charge.

Inventors: Yano; Toru (Tokyo, JP), Aoyama; Yohei (Tokyo, JP)

Assignee: Adeka Corporation

International Classification: G11B 7/24 (20130101)

Expiration Date: 2019-11-04 0:00:00