1：Experimental Design and Method Selection:

The study involved synthesizing a series of ortho-carbazole-appended triarylboron compounds (2-7) with different electron-accepting substituents via Suzuki-Miyaura coupling, lithiation, and other reactions. Photophysical, electrochemical, and theoretical analyses were conducted to investigate emission properties, energy levels, and molecular structures.

2：Sample Selection and Data Sources:

Compounds were synthesized from precursors like 9-(2,5-dibromophenyl)-9H-carbazole and characterized using NMR, elemental analysis, and X-ray crystallography. Photophysical data were obtained from solutions and PMMA films.

3：List of Experimental Equipment and Materials:

Equipment included NMR spectrometers (Bruker AM 300), elemental analyzer (Flash 2000), DSC (TA Instruments Q20), TGA (TA Instruments Q50), cyclic voltammetry system (Autolab/PGSTAT101), UV/vis spectrophotometer (Varian Cary 100), PL spectrophotometer (FS5), absolute PL quantum yield spectrophotometer (Quantaurus-QY C11347-11), transient PL decay system (FS5 with EPL-375 ps pulsed diode laser and microsecond xenon flashlamp), cryostat (OptistatDN), and X-ray diffractometer (Bruker SMART Apex II CCD). Materials included solvents (toluene, DMF), reagents (aryl boronic acids, Mes2BF, DMMN, ClPPh2), and PMMA matrices.

4：Experimental Procedures and Operational Workflow:

Synthesis involved lithiation, coupling, and oxidation steps under inert atmosphere. Photophysical measurements included UV/vis absorption, PL spectra, PLQY, and transient PL decay in oxygen-free and air-saturated conditions. Electrochemical studies used cyclic voltammetry in DMF. Theoretical calculations employed DFT and TD-DFT with Gaussian

5：Data Analysis Methods:

Data were analyzed using NMR spectroscopy, elemental analysis, X-ray diffraction, cyclic voltammetry, PL decay fitting, and computational software (Gaussian 16, AOMix, Multiwfn) for orbital analysis and energy calculations.