Radiation sensitive organic thin film comprising an azulenium salt
AssigneeCanon Kabushiki Kaisha
InventorsKazuharu Katagiri, Yoshihiro Oguchi, Yoshio Takasu
Life of this patent
Estimating the term…
Abstract
A radiation sensitive organic thin film comprising a compound which has at least one nucleus of azulanium salt.
Claims34
A radiation-sensitive organic thin film comprising a radiation-sensitive compound having at least one nucleus of an azulenium salt;
- said compound represented by the following general formula I, II or III:
- ##STR16## wherein;
- each of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, and R.sub.7 is hydrogen, halogen, or an organic monovalent residue, where at least one of the combinations (R.sub.1 and R.sub.2), (R.sub.3 and R.sub.4), (R.sub.4 and R.sub.5), (R.sub.5 and R.sub.6), and (R.sub.6 and R.sub.7) may form a substituted or unsubstituted aromatic ring;
- A is an organic divalent residue attached through a double bond to the azulenium nucleus;
- and Z.sup..crclbar. is an anion residue.
An electrophotographic photosensitive member comprising a conductive substrate and a radiation-sensitive organic thin film which comprises a radiation-sensitive compound having at least one nucleus of an azulenium salt;
- said compound represented by the following general formula I, II, or III:
- ##STR19## wherein;
- each of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, and R.sub.7 is hydrogen, halogen, or an organic monovalent residue, where at least one of the combinations (R.sub.1 and R.sub.2), (R.sub.3 and R.sub.4), (R.sub.4 and R.sub.5), (R.sub.5 and R.sub.6), and (R.sub.6 and R.sub.7) may form a substituted or unsubstituted aromatic ring;
- A is an organic divalent residue attached through a double bond to the azulenium nucleus;
- and Z.sup..crclbar. is an anionic residue;
- and electric properties of said organic thin film being variable by irradiating with radiation.
An optical recording medium having a radiation-sensitive organic thin film which comprises a radiation-sensitive compound having at least one nucleus of an azulenium salt;
- said compound represented by the following general formula I, II or III:
- ##STR21## wherein;
- each of R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, and R.sub.7 is hydrogen, halogen, or an organic monovalent residue, where at least one of the combinations (R.sub.1 and R.sub.2), (R.sub.3 and R.sub.4), (R.sub.4 and R.sub.5), (R.sub.5 and R.sub.6), and (R.sub.6 and R.sub.7) may form a substituted or unsubstituted aromatic ring;
- A is an organic divalent residue attached through a double bond to the azulenium nucleus;
- and Z.sup..crclbar. is an anionic residue;
- optical properties of said film being changeable by irradiating with radiation.
Dependencies are inferred from the claim text.