Supramolecular luminescence from oligofluorenol-based supramolecular polymer semiconductors.
Supramolecular luminescence stems from non-covalent exciton behaviors of active π-segments in supramolecular entities or aggregates via intermolecular forces. Herein, a π-conjugated oligofluorenol, containing self-complementary double hydrogen bonds, was synthesized using Suzuki coupling as a supramolecular semiconductor. Terfluorenol-based random supramolecular polymers were confirmed via concentration-dependent nuclear magnetic resonance (NMR) and dynamic light scattering (DLS). The photoluminescent spectra of the TFOH-1 solution exhibit a green emission band (g-band) at approximately ~520 nm with reversible features, as confirmed through titration experiments. Supramolecular luminescence of TFOH-1 thin films serves as robust evidence for the aggregates of g-band. Our results suggest that the presence of polyfluorene ketone defects is a sufficient condition, rather than a sufficient-necessary condition for the g-band. Supramolecular electroluminescence will push organic devices into the fields of supramolecular optoelectronics, spintronics, and mechatronics.
Center for Molecular Systems and Organic Devices (CMSOD), Key Laboratory for Organic Electronics & Information Displays, Institute of Advanced Materials, Nanjing University of Posts & Telecommunications, Nanjing 210046, China. iamlhxie@njupt.edu.cn.
Guang-Wei
GW
Zhang
Long
L
Wang
Ling-Hai
LH
Xie
Jin-Yi
JY
Lin
Wei
W
Huang
D005449:Fluorenes / Q000737:chemistry*; D006860:Hydrogen Bonding; D049449:Luminescence; D009682:Magnetic Resonance Spectroscopy; D011108:Polymers / Q000737:chemistry*; D012666:Semiconductors
D005449:Fluorenes; D011108:Polymers; C041509:fluorene