Polynaphthalene-Based Oxazaborinine Complexes Formulated as Red Light Emitters and High-Performance Asymmetric...

Area of Science:

• Materials Science
• Electrochemistry
• Organic Electronics

Background:

• Developing solid organic emitters with enhanced photophysical properties is crucial for optical and electrochemical technologies.
• Oxazaborinine complexes offer potential for advanced material applications due to their unique electronic structures.

Purpose of the Study:

• To synthesize and characterize novel oxazaborinine complexes for solid-state emission and supercapacitor applications.
• To investigate the photophysical properties and electrochemical performance of tri-naphthalene boron (TNB) and di-naphthalene boron (DNB) complexes.

Main Methods:

• Synthesis of polynapthaldimine-substituted di-naphthalene imine (DNI) and tri-naphthalene imine (TNI) followed by conversion to N,O-linked boron complexes.
• Characterization of solid-state emission properties and electrochemical performance using techniques like cyclic voltammetry and galvanostatic charge-discharge.
• Density Functional Theory (DFT) calculations to optimize structure and determine HOMO-LUMO energy levels.

Main Results:

• TNB and DNB complexes exhibit red light emission in the solid phase (TNB: λem 660 nm, PDMS composite: λem 632 nm).
• TNB shows a high specific capacitance of 896.25 F/g in a three-electrode configuration.
• An asymmetric supercapacitor device using TNB achieved a specific capacitance of 155 F/g, operated at 0–1.4 V, with an energy density of 42.19 W h/kg and 96% cyclic stability over 10,000 cycles.

Conclusions:

• The synthesized oxazaborinine complexes, particularly TNB, possess excellent photophysical and electrochemical properties suitable for advanced electrode materials.
• TNB demonstrates significant potential for high-performance supercapacitor applications in aqueous electrolytes.
• This research contributes to the development of next-generation supercapacitors with improved energy storage capabilities.