Fp 6200 spectrophotometer

3,6‐dibromobenzene‐1,2‐diamine and phthalic anhydride were purified by sublimation (10⁻² mbar) before use. All other purchased chemicals were used as received. ITO substrates were well cleaned and treated by Photo Surface Processor (PL 16‐110, replace lamp SUV110GS‐36) before use. IR spectra were obtained from Perkin Elmer Spectrum 100 Model FT‐IR spectrometer. ¹H NMR spectra were obtained on Bruker AC‐400 MHz NMR Spectrometer. GPC analysis was recorded by using a Malvern instrument connected with Viscotek‐VE3580‐RI‐Detector and standard polystyrene samples as calibration, which were performed on a polymer/THF solution at a flow rate of 1 mL min⁻¹ at 30 °C. TGA were taken under nitrogen atmosphere with 10 °C min⁻¹ rate and were recorded on Perkin Elmer Pyris 6 workstation. Photochemical measurements were obtained by using SHIMADZU UV‐3600 and Jasco FP‐6200 spectrophotometer. Cyclic voltammeter was measured by CHI‐660E electrochemical workstation at a voltage scan rate of 50 mV s⁻¹. Luminance properties of PLED were recorded by using Keithley source measurement (Keithley 2400 and Keithley 2000) with a calibrated silicon photodiode. The electroluminescent spectra were obtained by using Spectra scan PR650 spectrophotometer. Memory behaviour was carried out by Keithley 4200‐SCS semiconductor workstation under applied voltage with step of 0.05 V.