C. Ron
2014
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Journal
Chemical Reagents
Abstract
A novel spirobifluorene derivative,2-( 2-methyl-9,9'-spirobi[fluoren]-7-yl)-1H-benzo[d]imidazole( SPFMB) was synthesized starting from the readily available reagent 1-bromo-4-methylbenzene. The linear absorption,fluorescence and thermal properties were investigated. The T d of SPF-MB reaches 204. 5 ℃. SPF-MB showes excellent spectral sensitivities to pH changes and can be used as optical pH sensor of a wide pH range. The electroluminescent properties of SPF-MB is demonstrated with a device configuration of ITO / MoO3( 6 nm) /NPB( 80 nm) /EML( 30 nm) /TPBI( 40 nm) /LiF( 1 nm) /Al( 100 nm). Notably,the device of SPF-MB has a white emission with CIE coordinates( 0. 293,0. 307).