Benzotelluropyrylium diketonate electron accepting dye sensitizers for electron donating photoconductive compositions
AssigneeEastman Kodak Company
InventorsMichael R. Detty, Bruce J. Murray, Jerome H. Perlstein
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Abstract
Novel benzotelluropyrylium diketonate dyes are disclosed. The dyes are useful in improving the performance of electron donating photoconductive compositions and elements. Methods for making the dye sensitizers are also disclosed.
Claims17
A dye comprising a benzotelluropyrylium diketonate nucleus.
A dye comprising a benzotelluropyrylium diketonate nucleus having the structure:
- ##STR17## wherein
- R.sub.2 represents hydrogen, alkyl, amino, diarylamino, arylamino, alkylamino, dialkylamino, alkoxy, aryl, aryloxy, --CH.dbd.CH).sub.n CH.dbd.A.sub.1 or --CH.dbd.CH).sub.n A.sub.2 ;
- R.sub.1, R.sub.3, R.sub.4 and R.sub.5 each independently represents hydrogen, alkyl, alkoxy, aryl, aryloxy, halogen, amino, alkylamino, arylamino, dialkylamino or diarylamino;
- A.sub.1 represents a heterocyclylidene group containing at least one hetero atom selected from the group consisting of O, S, N, P, Se or Te;
- A.sub.2 represents alkyl, alkoxy, aryl, diarylamino, dialkylaminoaryl, dialkylamino, alkylamino, arylamino or a mono- or polycyclic, heterocyclic group containing at least one hetero atom selected from the group consisting of O, S, N, P, Se or Te;
- and
- n represents 0, 1, or 2;
- X represents O or S;
- and
- Y represents BF.sub.2 or PF.sub.4.
A method of making a benzotelluropyrylium boron diketonate dye comprising reacting a benzotelluropyrone with boron trifluoride etherate in glycol dimethyl ether.
A method of making a benzotelluropyrylium phosphorous diketonate comprising reacting a benzotelluropyrone with phosphorous pentafluoride in glycol dimethyl ether.
Dependencies are inferred from the claim text.