TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The fluorene functional group is of formula (I).    TECHNOLOGY FOCUS - POLYMERS - Preparation: Preparation (M1) of the polymer (p1) involves: the steps (i) to (iii) and heating the polymer under vacuum to a second predetermined temperature and drying the polymer for a second predetermined time. The first predetermined temperature is 100-110 degrees C and the first predetermined time is 48 hours. The second predetermined temperature is 145-155 degrees C and the second predetermined time is 24 hours. Preferred Method: In the method (M2), the first predetermined temperature is 100-110 degrees C and the first predetermined time is 48 hours; the second predetermined temperature is 145-155 degrees C and the second predetermined time is 24 hours. Preferred Components: The thermal degradation temperatures at 10 wt.% loss of the polymer under air and under nitrogen are 435 degrees C and 453 degrees C. The glass transition temperature of the polymer is 137 degrees C. In the polymer, the absorption peak of ultraviolet (UV) spectrum of the polymer in tetrahydrofuran (THF) solution is 313 nm and 387 nm or in solid state is 319 nm and 388 nm; the peaks of photoluminescence (PL) spectra of the polymer in (THF) solution and in solid state are 451 nm and 466 nm, respectively. The oxidation potential of the polymer is 4.8 eV. The highest occupied molecular orbital (HOMO) of the polymer is -4.93 eV and lowest unoccupied molecular orbital (LUMO) of the polymer is -2.12 eV. The polymer is of formula (II). In the copolymer, the absorption peaks of ultraviolet (UV) spectra of the copolymer in (THF) solution and in solid state are 430 nm; peaks of photoluminescence (PL) spectra of the copolymer in (THF) solution and in solid state are 505 nm and 535 nm.n=5-30. EXAMPLE - Bis(4-(2-phenyl-2-propyl)phenyl)dibromobenzene compound (BBTPA) (0.92 mmol), fluoreneboronic acid compound (9,9-dioctylfluorene-2,7-diboronic acid bis(1,3-propanediol) ester) (0.92 mmol), 3M potassium carbonate solution (K2CO3(aq)) (0.918 ml) and toluene (20 ml) were placed into a reaction vessel filled with nitrogen. Then tetrakis(triphenylphosphine)palladium (Pd(PPh3)4) (0.6 mmol) was added and the solution mixture was heated to temperature of 100-110 degrees C (preferably to 105 degrees C) and was refluxed for 48 hours. Subsequently, the polymer solution was deposited in 1 liter of methanol solution. The product was washed with a great amount of water after the solution was filtered. Then, the product was dissolved in toluene again and was deposited in 1 l of methanol solution and repeated three times. Subsequently, the product was heated to temperature 145-155 degrees C (preferably to 150 degrees C) under vacuum and was dried for 24 hours. The yield of poly-bis(4-(2-phenyl-2-propyl)phenyl)dioctylfluorene (PBTPAFL) was 92%. The produced (PBTPAFL) exhibited, thermal degradation temperature (at 10 wt.% loss) (Td10) measured under air by TGA (thermal gravimetric analysis) of 435 degrees C and measured under nitrogen by TGA of 453 degrees C; glass transition temperature (Tg) of measured at nitrogen flow rate of 10 ml/minute of 137 degrees C; the absorption peak of the ultraviolet (UV) spectrum in tetrahydrofuran (THF) solution of 313 nm and 387 nm; the peak of the photoluminescence (PL) spectrum in (THF) solution of 451 nm; the absorption peak of the ultraviolet (UV) spectrum in the solid state of 319 nm and 388 nm; the peak of the photoluminescence (PL) spectrum in the solid state of 466 nm.