| abstract |
Disclosed are unsymmetrical squaraine compounds of the following formula ##STR1## wherein R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of alkyl, aryl, heterocyclic, benzyl, and halobenzyl; and X 1 , X 2 and X 3 are independently selected from the group consisting of hydrogen, alkyl, halogen, carboxy, and hydroxy; and photoresponsive imaging members having incorporated therein the aforementioned squaraine compounds. |