Polymethine compounds, method of producing same, and use...

Details Polymethine compounds, method of producing same, and use... Polymethine compounds, method of producing same, and use...

2006-05-23

2006-05-23

Gilliam, Barbara L. (Department: 1752)

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

C430S302000, C430S944000, C430S945000, C101S453000, C101S463100, C548S469000

Reissue Patent

active

RE039105

ABSTRACT:
The invention provides near infrared absorbing materials showing high light-to-heat conversion efficiency and high sensitivity to lasers whose emission bands are within the range of 750 nm to 900 nm, original plates for direct printing plate making, and novel compounds which can be applied to such absorbing materials and plates. The compounds are polymethine compounds of the general formula (I) A detailed description of general formula (I) may be found in the specification.wherein R1represents an alkoxy group which may be substituted; R2represents an alkyl group which may be substituted; R3and R4each represents a lower alkyl group or R3and R4taken together represent a ring; X represents a hydrogen atom, a halogen atom or a substituted amino group; Y represents an alkoxy group which may be substituted or an alkyl group which may be substituted; Z represents a charge neutralizing ion.

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Narayanan, Narasimhachari and Gabor Patonay. “A New Method for the Synthesis of Heptamethine Cyanine Dyes: Synthesis of New Near-Infrared Fluorescent Labels.” J. Org. Chem. 60 (1995): 2391-2395.

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