2,6-Di-tert-butyl-4-substituted thiopyrylium salt, process for
申请人:Fuji Photo Film Co., Ltd.
公开号:US04315983A1
公开(公告)日:1982-02-16
2,6-Di-tert-Butyl-4-substituted thiopyrylium salt represented by formula (I), a process for production of said salt and a photoconductive composition containing said salt. ##STR1## wherein Z.sup..crclbar. is an anion, X is a hydrogen atom, an aryl group, a substituted aryl group or an alkyl group, and R.sup.1 and R.sup.2 are the same or different and include alkyl groups.
Thiopyrylium compounds and photoconductive compositions containing said
申请人:Fuji Photo Film Co., Ltd.
公开号:US04469864A1
公开(公告)日:1984-09-04
A thiopyrylium compound having t-butyl groups at the 2- and 6-positions of the thiopyrylium nucleus, having a main absorption near the red region, i.e., 600 to 700 nm but substantially no side absorption near 400 nm, and useful as a sensitizer for a photoconductive composition.
Recording element having a pyrypium or thiopyryliumsquarylium dye layer and new pyrylium or thiopyryliumsquarylium compounds
申请人:Philips Electronics N.V.
公开号:EP0116381A1
公开(公告)日:1984-08-22
An optical recording element having a recording layer which comprises an alkylpyrylium-squarylium dye, as well as novel alkylpyrylium-squarylium compounds.