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Synthesis of Conjugated Copolymer Containing Spirobifluorene Skeleton by Acyclic Diene Metathesis Polymerization for Polymer Light‐Emitting Diode Applications
Author(s) -
Park Seongwook,
Jeong Soyeong,
Kang Changmuk,
Hong Sukwon
Publication year - 2021
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.12281
Subject(s) - polymer , polymerization , materials science , metathesis , photoluminescence , acyclic diene metathesis , polymer chemistry , copolymer , ring opening metathesis polymerisation , alkyl , photochemistry , chemical engineering , chemistry , organic chemistry , optoelectronics , composite material , engineering
Grubbs‐type, Hoveyda‐type, cyclic alkyl amino carbene (CAAC)‐based ruthenium olefin metathesis catalysts were used for the acyclic diene metathesis (ADMET) polymerization of 2,7‐divinyl‐9,9‐di‐ n ‐octylfluorene (DVF). Additionally, various ratios of DVF and 2,2′,7,7′‐tetravinyl‐9,9′‐spirobifluorene (TVSF) were subjected to ADMET polymerization to obtain polymers P1–P7. Polymers P1–P4 were analyzed with gel permeation chromatography, UV–vis spectroscopy, and photoluminescence spectroscopy. As the TVSF ratio increases, polymers exhibit lower solubility but a narrower band in the photoluminescence spectrum. Polymer light‐emitting diode (PLED) devices were fabricated with polymers P1, P2, and P3. The performances of the PLED devices indicated that polymers including more spirobifluorene blocks showed better turn‐on voltage, brightness, current efficiency, and power efficiency.