Synthesis and photophysical properties of carbazole-based blue light-emitting dendrimers |
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Authors: | Adhikari Ravi M Mondal Rajib Shah Bipin K Neckers Douglas C |
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Institution: | Center for Photochemical Sciences, Bowling Green State University, Bowling Green, Ohio 43403, USA. |
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Abstract: | A new class of highly fluorescent and stable carbazole-based dendrimers (1-5) that contain the ethynylbenzene and diethynylbenzene cores has been synthesized and characterized. They show very high extinction coefficients of absorption (A(max) approximately 328-353 nm) and high quantum yields of fluorescence (lambda(max) approximately 386-437 nm; Phi(F) approximately 0.72-0.89; tau(F) approximately 2.09-3.91 ns) in dichloromethane. The quantum yields of fluorescence of 1-5 in the solid state are equally high (lambda(max) approximately 385-422 nm; Phi(F) approximately 0.40-0.85). These data indicate their potential use as blue-emitting materials in organic light-emitting diodes (OLEDs). |
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