## 2 Materials and Methods
### Characterization of 2-chloro-4,6-diphenylpyrimidine (6)  
Yield: 80%; white solid; \({}^{1}\)H NMR (500 MHz, CDCl\({}_{3}\)) 8 8.13-8.14 (m, 4H), 8.01 (s, 1H), and 7.51-7.55 (m, 6H); \({}^{13}\)C NMR (500 MHz, CDCl\({}_{3}\)) 8 167.7, 162.1, 135.7, 131.7, 129.1, 127.5, and 111.0. Synthesis of N\({}^{1}\)-(9,9-diphenyl-9H-fluoren-2-yl)-N\({}^{1}\)-(4,6-diphenylpyrimidine-2-yl)-N\({}^{4}\),N\({}^{4}\)diphenylbenzene-1,4-diamine (FLU-TPA/PYR)  
A mixture of N\({}^{1}\)-(9,9-diphenyl-9H-fluoren-2-yl)-N\({}^{4}\),N\({}^{4}\)-diphenylbenzene-1,4-diamine (3, 1.0 g, 1.73 mmol), 2-chloro-4,6-diphenylpyrimidine (6, 0.50 g, 1.90 mmol), palladium (II) acetate (Pd(OAc)\({}_{2}\), 0.08 g, 0.34 mmol), 10% tri-_tert_-butylphosphine in toluene (\(t\)Bu\({}_{3}\)P, 0.12 mL, 0.52 mmol), sodium _tert_-butoxide (NaOfBu, 0.28 g, 2.94 mmol), and 80 mL of anhydrous toluene was added into a two-neck round-bottom flask that was equipped with a condenser, and this mixture was refluxed at 110 \({}^{\circ}\)C for 12 h in a nitrogen atmosphere while stirring magnetically. The crude residues were separated by a silica column and an \(n\)-hexane:dichloromethane (1:1) solvent system to obtain the target final product FLU-TPA/PYR, and further purification was carried out using ethyl ether/petroleum ether (Scheme 2). Characterization of N\({}^{1}\)-(9,9-diphenyl-9H-fluoren-2-yl)-N\({}^{1}\)-(4,6-diphenylpyrimidine-2-yl)-N\({}^{4}\),N\({}^{4}\)diphenylbenzene-1,4-diamine (FLU-TPA/PYR)  
Yield: 83%; yellow solid; FT-IR (KBr pellet): umar 3056.6, 1586.7, 1562.9, 1536.6, 1505.0, 1491.8, 1452.9, 1403.2, 1353.9, 1306.0, 1272.6, 1234.2, 1184.0, 1155.7, 1108.0, 1070.4, 1029.4, 1001.6, 981.5, 922.7, 883.0, 832.9, and 822.9 cm\({}^{-1}\), \({}^{1}\)H NMR (500 MHz, CDCl\({}_{3}\)) 8 7.92-7.93 (d, \(J\) = 7.0 Hz, 4H), 7.79-7.81 (d, \(J\) = 8.0 Hz, 1H), 7.76-7.77 (d, \(J\) = 7.5 Hz, 1H), 7.60 (s, 1H), 7.52 (s, 1H), 7.36-7.45 (m, 9H), 7.25-7.28 (t, \(J\) = 8.5 Hz, 5H), 7.19-7.21 (m, 6H), 7.13-7.15 (m, 6H), 7.08-7.11 (m, 6H), 7.00-7.03 (t, \(J\) = 7.5 Hz, 2H); \({}^{13}\)C NMR (500 MHz, CDCl\({}_{3}\)) 8 165.2, 162.7, 151.9, 151.3, 147.9, 145.9, 144.7, 144.6, 140.2, 140.0, 137.5, 137.1, 130.6, 129.2, 128.8, 128.2, 127.6, 127.3, 127.1, 126.6, 126.3, 125.5, 124.8, 123.9, 122.6, 120.6, 120.0, and 104.1; MS (APCI) _m/z_: 806.71 for C\({}_{59}\)H\({}_{42}\)N\({}_{4}\) [(M + H)\({}^{+}\)]; Anal. Calcd. for C\({}_{59}\)H\({}_{42}\)N\({}_{4}\) (%): C, 87.81; H, 5.25; and N, 6.94. Found: C, 88.92; H, 5.33; and N, 7.02. Synthesis of N\({}^{1}\)-(4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)-N\({}^{1}\)-(9,9-diphenyl-9H-fluoren-2-yl)-N\({}^{4}\),N\({}^{4}\)-diphenylbenzene-1,4-diamine (FLU-TPA/TRZ)  
A mixture of \(N^{1}\)-(9,9-diphenyl-9H-fluoren-2-yl)-N\({}^{4}\),N\({}^{4}\)-diphenylbenzene-1,4-diamine (3, 1.0 g, 1.73 mmol), 2-(4-bromophenyl)-4,6-diphenyl-1,3,5-triazine (7, 0.74 g, 1.90 mmol), palladium (II) acetate (Pd(OAc)\({}_{2}\), 0.08 g, 0.34 mmol), 10% tri-_tert_-butylphosphine in toluene (\(t\)Bu\({}_{3}\)P, 0.12 mL, 0.52 mmol), sodium _tert_-butoxide (NaOfBu, 0.28 g, 2.94 mmol) and 80 mL of anhydrous toluene was added into a two-neck round-bottom flask that was equipped with a condenser, and this mixture was refluxed at 110 \({}^{\circ}\)C for 12 h in a nitrogen atmosphere while stirring magnetically. The crude residues were separated by a silica column and an \(n\)-hexane:dichloromethane (1:1) solvent system to obtain the target final product FLU-TPA/TRZ as a yellow solid (Scheme 2).