Photothermal transducing type of recording medium

Claim 1

A photothermal transducing type of recording medium comprising a substrate and a film comprising at least one azulenium salt represented by the following general formula [I], [II], [III], or [IV]: ##STR175## wherein at least one of combinations of R 1 1 and R 1 2 , R 1 2 and R 1 3 , R 1 3 and R 1 4 , R 1 4 and R 1 5 , R 1 5 and R 1 6 , and R 1 6 and R 1 7 forms a substituted or unsubstituted heterocyclic ring or alicyclic ring formed of aliphatic chain together with the two adjacent carbon atoms, and each of R 1 1 , R 1 2 , R 1 3 , R 1 4 , R 1 5 , R 1 6 and R 1 7 which do not participate in the formation of the ring represents hydrogen, halogen or organic monovalent radical; A 1 represents an organic divalent radical linked by a double bond to the 5-membered ring; and Z.sup.⊖ represents an anion, ##STR176## wherein R 2 1 , R 2 2 , R 2 3 , R 2 4 , R 2 5 , R 2 6 , and R 2 7 each represent hydrogen, halogen or organic monovalent radical, or they may be joined together with the two adjacent carbon atoms to form a substituted or unsubstituted ring with at least one of the combinations: R 2 1 and R 2 2 , R 2 2 and R 2 3 , R 2 3 and R 2 4 , R 2 4 and R 2 5 , R 2 5 and R 2 6 , and R 2 6 and R 2 7 ; Z.sup.⊖ represents an anion; A 3 represents one of the following general formula (i)-(vi): ##STR177## wherein R 2 8 and R 2 9 each represent a substituted or unsubstituted alkyl, aryl, or aralkyl group, or they may be joined together with the nitrogen to which they are attached to form a ring; Ar 1 and Ar 2 each represent a substituted or unsubstituted arylene group R 2 10 , R 2 11 , and R 2 12 each represent hydrogen, alkyl, alkoxyl, or a substituted or unsubstituted aryl, substituted or unsubstituted styryl, substituted or unsubstituted 4-phenyl-1,3-butadienyl, or substituted or unsubstituted heterocyclic radical, or the combination of R 2 10 and R 2 11 or R 2 11 and R 2 12 may form a substituted or unsubstituted benzene ring; R 2 13 represents hydrogen, nitro, alkyl, or aryl; X 1 represents oxygen, sulfur, or selenium; A 4 represents an atom group necessary to form a substituted or unsubstituted pyrane, thiapyrane, selenapyrane, benzopyrane, benzothiapyrane, benzoselenapyrane, naphthopyrane, naphthothiapyrane, or naphthoselenapyrane; m 1 represents an integer of 0, 1, or 2; n 1 represents an integer of 0 or 1; R 2 14 , R 2 15 , R 2 16 , R 2 17 , R 2 18 , R 2 19 , R 2 20 , and R 2 21 each represent hydrogen, halogen, alkyl, alkoxyl, hydroxyl, substituted or unsubstituted aryl, substituted or unsubstituted aralkyl, or nitro, or they may be joined together with the two adjacent carbon atoms to form a substituted or unsubstituted aromatic ring with at least one of the combinations: R 2 14 and R 2 15 , R 2 15 and R 2 16 , R 2 16 and R 2 17 , R 2 18 and R 2 19 , R 2 19 and R 2 20 , and R 2 20 and R 2 21 ; X 2 represents oxygen, sulfur, or selenium; R 2 22 represents hydrogen, nitro, cyano, alkyl, or aryl, n 2 represents an integer of 0, 1, or 2; R 2 23 , R 2 24 , R 2 25 , R 2 26 , R 2 27 , R 2 28 , R 2 30 , R 2 31 , R 2 32 , R 2 33 , R 2 34 , and R 2 35 each represent hydrogen, halogen, alkyl, alkoxyl, substituted or unsubstituted aryl, substituted or unsubstituted aralkyl, nitro, or acyl, or they may be joined together with the two adjacent carbon atoms to form a substituted or unsubstituted ring with at least one of the combinations: R 2 23 and R 2 24 , R 2 24 and R 2 25 , R 2 25 and R 2 26 , R 2 26 and R 2 27 , and R 2 27 and R 2 28 , or at least one of the combinations: R 2 30 and R 2 31 , R 2 31 and R 2 32 , R 2 32 and R 2 33 , R 2 33 and R 2 34 , and R 2 34 and R 2 35 ; R 2 29 represents hydrogen nitro, alkyl, or aryl; and n 3 represents an integer of 0, 1, or 2.