Preparation of n^n^c^n tetradentate platinum (ii) complex and uses thereof

A N{circumflex over ( )}N{circumflex over ( )}C{circumflex over ( )}N tetradentate platinum (II) complex, having a structure as shown in Formula (11):

• wherein R1 to R16 are independently selected from hydrogen, deuterium, sulfur, halogen, a hydroxyl group, an acyl group, an alkoxy group, an acyloxy group, an amino group, a nitryl group, an acylamino group, a cyano group, a carboxyl group, a styryl group, an aminocarbonyl group, a carbamoyl group, a benzylcarbonyl group, an aryloxy group, a diarylamine group, a saturated alkyl group containing 1 to 30 carbon atoms, an unsaturated alkyl group containing 1 to 20 carbon atoms, a substituted or unsubstituted aryl group containing 5 to 30 carbon atoms, or a substituted or unsubstituted heteroaryl group containing 5 to 30 carbon atoms, or adjacent R1 to R16 are connected to each other by a covalent bond to form a ring.