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Solvent and Steric Hindrance Effects of Bulky Poly(9,9‐diarylfluorene)s on Conformation, Gelation, Morphology, and Electroluminescence
Author(s) -
Liu Bin,
Lin Jinyi,
Lei Zhenfeng,
Sun Mingli,
Xie Linghai,
Xue Wei,
Yin Chengrong,
Zhang Xinwen,
Huang Wei
Publication year - 2015
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201400568
Subject(s) - steric effects , photoluminescence , quantum yield , electroluminescence , solvent , conjugated system , morphology (biology) , polymer , polymer chemistry , phase (matter) , materials science , solvent effects , side chain , chemistry , photochemistry , chemical engineering , organic chemistry , nanotechnology , fluorescence , optics , optoelectronics , physics , engineering , layer (electronics) , biology , genetics
Clarification of the solvent effects of bulky π ‐conjugated polymers on the conformation behavior and morphology evolution of the chain from solution to thin film is the main prerequisite for the molecular design of printable polymer light‐emitting materials. Here, three bulky poly(9,9‐diarylfluorene)s (PFs) with the steric hindrance effect are synthesized to examine gelation behaviors, β‐phase conformation, film morphology, and electroluminescence (EL) spectra in three solvents. Their gelation behaviors occur in 1,2‐dichloroethane (DCE) of high concentrations, featuring emission bands of ≈470 nm as well as the β‐phase conformation. Bulky PFs also exhibit different solvent effects on the morphology and green emission bands. Compared with other bulky PFs, poly(spirofluorenexanthene)s have obvious advantages in terms of the solvent‐independent emission, high quantum yield, and air‐stable photoluminescence, as well as the EL spectra. Poly(SFX) will be potential components for the formula of optical inks in printed electronics.