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1IntroductionThere has been wide interest in the photophysical properties of rod-like fluorene based conjugated poly-mers because of their potential applicationsin various optoelectronic devices ,especiallyin polymerslight-emit-ting diodes (PLEDs)[1].Inth
1 Introduction has has wide interest in the photophysical properties of rod-like fluorene based conjugated poly-mers because of their potential applications in various optoelectronic devices, especially in polymers light-emit-ting diodes (PLEDs) [1]. Inth