A new blue light-emitting terphenyl-bridged bisbenzimidazolium salts: Synthesis, crystal structure, and photophysical properties

作者：Luo, Zhonghua; Shi, Hong; Zhu, Hongjun^*; Song, Guangliang; Liu, Yuanyuan

来源：Dyes and Pigments, 2012, 92(1): 596-602.

DOI：10.1016/j.dyepig.2011.06.030

• Benzimidazolium
• Terphenyl
• Blue light-emitting material
• Synthesis
• Optical property
• Solubility

Eight novel terphenyl-bridged bisbenzimidazolium salts bearing N-alkyl side chains were synthesized by alkylation and quaternization of terphenyl-bridged bisbenzimidazoles with excess alkyl bromides, using sodium carbonate as the base in N,N-dimethylformamide solution. The bisbenzimidazolium salts showed good solubility in water and common organic solvents, such as dichloromethane, chloroform, methanol, acetonitrile, and N,N-dimethylformamide. They emitted violet blue light (lambda(Em)(max) approximate to 397-400 nm) with fluorescence quantum yields of 0.65-0.78 in aqueous solution, whereas they emitted blue light (lambda(Em)(max) approximate to 420-441 nm) in thin films. The photoluminescent properties and crystal structure of the bisbenzimidazolium salts have been investigated.

• 出版日期2012-1
• 单位南京工业大学