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5. 4-SBF with electron acceptor substituent
There are few examples of 4-SBF derivatives with electron-deficient groups, and we will only describe here those that have been used as host matrix in PhOLEDs. These six derivatives are shown in figure 9 . 4-5Pm-SBF , 4-4Py-SBF , 4-3Py-SBF...
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4-SBF with electron acceptor substituent
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