Fluorenylaminoketone photoinitiator, preparation method thereof, and uv photocurable composition containing same

A fluorenylaminoketone photoinitiator, wherein the photoinitiator comprises a compound having a structure represented by general formula (I) or a derivative compound thereof,

• wherein,
• A represents hydrogen, a halogen, a nitro group, a C1-C20 linear or branched alkyl group, a C3-C10 alkylcycloalkyl group, a C4-C10 cycloalkylalkyl group,
• —COR6, or a —CO—CR2R3R4 group, wherein, optionally, —CH2— is substituted with O, N, S, or C(═O);
• R1 represents hydrogen, a halogen, a C1-C20 linear or branched alkyl group, a C4-C20 cycloalkylalkyl group, or a C2-C20 alkenyl group, wherein, optionally, —CH2— in R1 is substituted with O, N, S, or C(═O), and, optionally, a ring is formed between R1s;
• R2 and R3 each independently represent a C1-C20 linear or branched alkyl group, a C3-C20 cycloalkyl group, a C4-C20 cycloalkylalkyl group, a C4-C20 alkylcycloalkyl group, a C6-C20 aryl group, or a C6-C20 alkylaryl group, wherein, optionally, one or more hydrogen atoms in these groups is each independently substituted with an alkyl group, a halogen, a hydroxy group, or a nitro group, and optionally, —CH2— in R2 and R3 is substituted with O, N, S, or C(═O), and, optionally, R2 and R3 is linked to each other to form a ring;
• or R2 represents a C1-C20 linear or branched alkyl group or a C2-C20 alkenyl group, and R3 is selected from any one of the following groups:
• a) a group having a chemical formula as follows:
• wherein m is 0 or 1, R9 represents hydrogen, a C1-C8 alkyl group, or a phenyl group, and R10, R11, and R12 each independently represent hydrogen or a C1-C4 alkyl group;
• or
• b) a group having a chemical formula as follows:
• wherein n is 0, 1, 2, or 3;
• or
• c) a group having a chemical formula as follows:
• wherein Ar is a substituted or unsubstituted phenyl, naphthyl, furanyl, thienyl, or pyridinyl group;
• R4 represents a N-morpholinyl group, a N-piperidinyl group, a N-pyrrolyl group, or a N-dialkyl group, wherein, optionally, one or more hydrogen atoms in these groups is substituted with a halogen or a hydroxy group;
• R5 and R5′ each independently represent a C1-C20 linear or branched alkyl group, a C4-C20 cycloalkyl group, a C2-C20 alkenyl group, a C6-C20 aryl group, or a C6-C20 alkylaryl group, wherein, optionally, one or more hydrogen atoms in these groups is each independently substituted with an alkyl group, a halogen, a hydroxy group, or a nitro group, and optionally, —CH2— in these groups is substituted with —O—;
• or, optionally, R5 and R5′ forms a five-membered or six-membered ring by being linked to each other or via —O—, —S—, or —NH—;
• R6 represents a C1-C20 linear or branched alkyl group, a C4-C20 cycloalkyl group, a C4-C20 alkylcycloalkyl group, a C2-C20 alkenyl group, a C6-C20 aryl group, or a C6-C20 alkylaryl group, wherein, optionally, —CH2— in these groups is substituted with —O— or —S—, and, optionally, one or more hydrogen atoms in these groups is independently substituted with a group selected from an alkyl group, a halogen, a nitro group, a cyano group, SR7, and OR8;
• R7 and R8 each independently represent hydrogen or a C1-C20 linear or branched alkyl group.