Novel radiation sensitive compounds and radiation sensitive compositions containing the same
AssigneeEastman Kodak Company
InventorsConstantine C. Petropoulos, George A. Reynolds, James A. VanAllan
Life of this patent
Estimating the term…
Abstract
Pyrylium, thiapyrylium and selenapyrylium salts and derivatives thereof having a trimethine linkage containing an aryl substituent attached to at least one carbon atom of the trimethine linkage are disclosed. Radiation sensitive compositions, e.g., photoconductive compositions, containing such materials are also disclosed.
Claims8
A pyrylium-type salt having the formula:
- ##STR20## wherein:
- each of X.sup.1 and X.sup.2, which may be the same or different, represents oxygen, sulfur, or selenium;
- each of Y.sup.1 and Y.sup.2, which may be the same or different, represents the atoms necessary to complete a heterocyclic unsaturated ring nucleus having 6 or 10 ring atoms including a selenium, sulfur or oxygen hetero ring atom and 5 or 9 carbon ring atoms;
- each of R.sup.1, R.sup.2, and R.sup.3, which may be the same or different, represents hydrogen, halogen, cyano, nitro, alkyl having 1 to about 4 carbon atoms in the alkyl group, or aryl, with the proviso that at least one of R.sup.1, R.sup.2, or R.sup.3 represents phenyl or alkoxyphenyl;
- and
- Z.sup..crclbar. represents an anionic function.
A pyrylium-type salt selected from the group consisting of 4-[3-(2,6-Diphenyl-4H-pyran-4-ylidene)-2-phenylpropen-1-yl]-2,6-diphenylpy rylium perchlorate;
- 4-[3-(2,6-Diphenyl-4H-pyran-4-ylidene)-2-phenylpropen-1-yl]flavylium perchlorate;
- 4-[3-(4H-Benzopyran-4-ylidene)-2-phenylpropen-1-yl]flavylium perchlorate;
- and 4-[3-(2,6-Diphenyl-4H-pyran-4-ylidene)-2-(p-methoxyphenyl)propen-1-yl]-2,6 -diphenylpyrylium perchlorate.
A radiation sensitive composition comprising a radiation sensitive material which absorbs radiation having a wavelength of greater than about 680 nm., said material having the formula:
- ##STR23## wherein:
- each of X.sup.1 and X.sup.2, which may be the same or different, represents oxygen, sulfur, or selenium;
- each of Y.sup.1 and Y.sup.2, which may be the same or different, represents the atoms necessary to complete a heterocyclic unsaturated ring nucleus having 6 or 10 ring atoms including a selenium, sulfur or oxygen hereto ring atom and 5 or 9 carbon ring atoms;
- each of R.sup.1, R.sup.2, and R.sup.3, which may be the same or different, represents hydrogen, halogen, cyano, nitro, alkyl having 1 to about 4 carbon atoms in the alkyl group, or aryl, with the proviso that at least one of R.sup.1, R.sup.2, or R.sup.3 represents phenyl or alkoxyphenyl;
- and
- Z.sup..crclbar. represents an anionic function.
A radiation sensitive composition comprising a radiation sensitive pyrylium-type salt and a non-interfering carrier for said salt, said salt having the formula:
- ##STR24## wherein:
- each of X.sup.1 and X.sup.2, which may be the same or different, represents oxygen, sulfur, or selenium;
- each of Y.sup.1 and Y.sup.2, which may be the same or different, represents the atoms necessary to complete a heterocyclic unsaturated ring nucleus having 6 or 10 ring atoms including a selenium, sulfur or oxygen hetero ring atom and 5 or 9 carbon ring atoms;
- each of R.sup.1, R.sup.2, and R.sup.3, which may be the same or different, represents hydrogen, halogen, cyano, nitro, alkyl having 1 to about 4 carbon atoms in the alkyl group, or aryl, with the proviso that at least one of R.sup.1, R.sup.2, or R.sup.3 represents aryl;
- and
- Z.sup..crclbar. represents an anionic function.
Dependencies are inferred from the claim text.