Chain multiyne compound, preparation method and application thereof

A chain multiyne compound of Formula I:

• wherein X is any one of —O—, —S—, —CR4R5—, —SiR6R7— and —NR8—, R4, R5, R6, R7 and R8 are independently any one of hydrogen, C1-C20 alkyl, C1-C20 ester group, C1-C20 acyl, C3-C20 cycloalkyl, C1-C20 alkyl halide, nitrile group, nitryl, substituted or unsubstituted aryl and
• R9 is any one of C1-C8 alkyl and substituted or unsubstituted phenyl;
• R1 is any one of nitrile group, substituted or unsubstituted C2-C30 alkynyl, substituted or unsubstituted C4-C30 multiyne, substituted or unsubstituted C3-C30 cumulene group, without containing a structure unit of —C≡CCH(OH)C≡C—;
• R2 and R3 are independently any one of hydrogen, substituted or unsubstituted aryl, substituted or unsubstituted C1-C8 alkyl, substituted or unsubstituted C1-C8 alkoxy, substituted or unsubstituted C1-C8 alkylthiol, substituted or unsubstituted C3-C8 cycloalkyl and substituted or unsubstituted C2-C8 alkynyl, without containing a structure unit of —C≡CCH(OH)C≡C—;
• and
• m and n are independently integers from 1-6, and m+n<8;
• wherein the multiyne compound is any one of the following compounds:

A method of synthesizing a fused-ring metallacyclic compound, comprising reacting the chain multiyne compound of Formula I with a metal complex

• wherein X is any one of —O—, —S—, —CR4R5—, —SiR6R7— and —NR8—;
• R4, R5, R6, R7 and R8 are independently any one of hydrogen, C1-C20 alkyl, C1-C20 ester group, C1-C20 acyl, C3-C20 cycloalkyl, C1-C20 alkyl halide, nitrile group, nitryl, substituted or unsubstituted aryl and
• R9 is any one of C1-C8 alkyl and substituted or unsubstituted phenyl;
• R1 is any one of nitrile group, substituted or unsubstituted C2-C30 alkynyl, substituted or unsubstituted C4-C3o multiyne, substituted or unsubstituted C3-C30 cumulene group, without containing a structure unit of —C≡CCH(OH)C≡C—;
• R2 and R3 are independently any one of hydrogen, substituted or unsubstituted aryl, substituted or unsubstituted C1-C8 alkyl, substituted or unsubstituted C1-C8 alkoxy, substituted or unsubstituted C1-C8 alkylthiol, substituted or unsubstituted C3-C8 cycloalkyl and substituted or unsubstituted C2-C8 alkynyl, without containing a structure unit of —C≡CCH(OH)C≡C—;
• and
• m and n are independently integers from 1-6, and m+n<8;
• wherein the metal complex is DEaLb;
• D is any one of Fe, Co, Ni, Ru, Mn, Re, Cr, Mo, W, V, Nb, Ta, Ti, Zr, Hf, Rh, Pd, Ir, Pt and Os;
• E is any one of H, halogen, SCN and CN;
• L is any one of a phosphine ligand, a CO ligand, a pyridine ligand, a N-heterocyclic carbene ligand, a nitrile ligand and an isocyanoid ligand;
• and
• a and b are independently integers from 0-6.