期刊
MACROMOLECULES
卷 46, 期 2, 页码 362-369出版社
AMER CHEMICAL SOC
DOI: 10.1021/ma302296z
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资金
- Max Planck Partner Group
- University of Hyderabad for Materials Chemistry [MPGA POLY 0006]
- Max Planck Society, Germany
- Max Planck Society (MPG), Germany
- CSIR, New Delhi
4-Ethynyl-2,6-bis(pyrazolyl)pyridine (BPP) end-capped fluorene (FO) homo (P1) and FO-BPP main chain copolymers (P2 and P3) with M-n around 10 kDa were successfully prepared. The optical band gap of P1-P3 copolymers were 2.69, 2.88, and 2.90 eV, respectively. Spin-coated P2 and P3 thin films displayed blue and green dual emissions giving a mixed cyan color light under UV irradiation. By exploiting the metal coordinating ability of main chain tridentate BPP units, a red emitting Eu(III) ion coordinated conjugated polymer [FO-(BPP(Eu(tta)(3)))](n) layer was formed on top of the P2 and P3 thin films via the dip-coating technique to achieve white color radiant films displaying triple emission with maxima at 425, 543, 614 nm and 428, 543, 611 nm for P2 and P3, respectively. The CIE (Commission internationale de l'Eclairage) coordinates were found to be (0.31, 0.35) and (0.31, 0.32) for white emitting films made from P2 and P3, respectively. These values are very close to the designated coordinates for a perfect white light emission (x = 0.33; y = 0.33).
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