Quantum dot material, quantum dot light-emitting device and preparation method thereof

A quantum dot material, wherein the quantum dot material comprises a quantum dot body and a quantum dot ligand forming a coordination interaction with the quantum dot body, the quantum dot ligand satisfying a first general formula comprising:

• wherein A is a ligand group, B is a first linkage group, C1 is a first polar group, C2 is a second polar group, D1 is a second linkage group, D2 is a third linkage group, and E is a terminal group;
• m is an integer greater than or equal to 1;
• i is an integer greater than or equal to 1;
• the first linkage group comprises —(CH2)n—;
• the second linkage group and the third linkage group each comprise at least one of:
• and n is an integer greater than or equal to 0, wherein, when m is greater than or equal to 2, there are a plurality of the first polar groups and a plurality of the second linkage groups, and wherein the plurality of the first polar groups are different and the plurality of the second linkage groups are different;
• and
• when i is greater than or equal to 2, there are a plurality of the second polar groups and a plurality of the third linkage groups, and wherein the plurality of the second polar groups are different and the plurality of the third linkage groups are different.