Fluorene-containing polyhedral oligomericsilsesquioxanes modified hyperbranched polymer for white light-emitting diodes with ultra-high color rendering index of 96

Wang, Mixue; Wei, Xiaozhen; Zhang, Weixuan; Zhao, Haixia; Wu, Yuling; Miao, Yanqin; Wang, Hua; Xu, Bingshe

doi:10.1016/j.jssc.2021.122122

Cited by 9 publications

(1 citation statement)

References 46 publications

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“…Given all these features, SBFs have found many applications in organic electronics, [18][19][20] catalysis, [21] and polymer chemistry. [22][23][24] The expression of spiroconjugation in SBFs stems from the fully antisymmetric combination (AA) between four p orbitals of the carbon atoms directly attached to the spiro center with respect to the two perpendicular planes (Figure 1). The HOMO of the fluorene subunits of SBF splits into spiro-antibonding HOMO and spiro-bonding HOMO-1 as a consequence of spiroconjugative interactions, whereas mixed arrangements (AS or SA) of the p orbitals prevent spiro-splitting of LUMO/LUMO + 1 pair.…”

Section: Introductionmentioning

confidence: 99%

ON/OFF Spiroconjugation through Peripheral Functionalization: Impact on the Reactivity and Chiroptical Properties of Spirobifluorenes

et al. 2022

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In memory of Prof. Dr. François Diederich Spirobifluorenes are an important class of spiro compounds frequently used in the field of organic electronics. However, harnessing spiroconjugation to obtain high-performance in such structural motifs remains unexplored. We herein propose that peripheral functionalization may serve as a useful tool to control spiroconjugation in an ON/OFF manner on both chemical reactivity and photophysical properties. In particular, the ratio of mono-and di-functionalized spirobifluorenes found experimentally during their synthesis were found to be 3/2, 7/2, and 12/2 for phenyl, nitro-phenyl and amino-phenyl analogues, respectively. These remarkable reactivity differences correlate with the spiroconjugation character evaluated theoretically at the CAM-B3LYP/6-31G(d,p) level of theory. Additionally, comparison of experimental and predicted optical and chiroptical responses shows that spiroconjugated molecular orbitals have a significant or negligible involvement on the main electronic transitions depending on the peripheral functionality of the spirobifluorene.

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Section: Introductionmentioning

confidence: 99%

ON/OFF Spiroconjugation through Peripheral Functionalization: Impact on the Reactivity and Chiroptical Properties of Spirobifluorenes

et al. 2022

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Flexible anodic bonding for the bonding between elastomer and metal

Zhao¹,

Liu

et al. 2022

J of Applied Polymer Sci

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Considering the inadaptability of traditional anodic bonding to polymer materials, the flexible anodic bonding process is developed. The bonding characteristics of the dynamic intelligent electric fields with the low-temperature plasma surface treatment to polymer and ultrasonic-assisted preconnection before bonding are very suitable for the anodic bonding of polymer elastomer to aluminum (Al) sheet. A series of composite polyurethane elastomer cathode materials (CPECs) with good bonding properties are prepared and characterized. The highest ionic conductivity of CPECs can reach to 2.7 Â 10 À3 S/cm (CPEC2) at 75 C. After bonded, it is determined that a uniform and dense intermediate bonding layer showed by SEM is formed between CPECs and Al. In addition, different elements including C, O, F, S, and Al are clearly iden-

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Hyperbranched Polymers for Organic Semiconductors

et al. 2023

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Hyperbranched polymers (HBPs) have attracted increasing attention owing to their distinct highly branched topological structures, resulting in unique properties and wide applications in organic semiconductors (OSCs). In this Review, recent progress in functional HBPs is outlined in the field of OSCs, including organic light‐emitting diodes (OLEDs), organic photovoltaics (OPVs), dye‐sensitized solar cells (DSSCs), and organic field effect transistors (OFETs), among others. Prospects of HBPs‐based materials in OSCs are examined. The results revealed that multi‐dimensional topologies not only regulate the electron (hole) transport but also adjust the film morphology, thereby affecting the efficiency and long life of organic electronic devices. Many studies showed the usefulness of HBPs as hole transport materials but reports dealing with n‐type and ambipolar materials are still lacking. In addition, the interchain covalent bond in hyperbranched polymers could mitigate the damage caused by stretching, conducive to building stable flexible stretchable devices with long‐term durability and good safety under harsh environmental conditions. Overall, the flexible stretchable design may enrich the applications of HBPs in organic semiconductors and provide new ideas for guiding the future design of functional organic semiconductor materials.

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Fluorene-containing polyhedral oligomericsilsesquioxanes modified hyperbranched polymer for white light-emitting diodes with ultra-high color rendering index of 96

Cited by 9 publications

References 46 publications

ON/OFF Spiroconjugation through Peripheral Functionalization: Impact on the Reactivity and Chiroptical Properties of Spirobifluorenes

ON/OFF Spiroconjugation through Peripheral Functionalization: Impact on the Reactivity and Chiroptical Properties of Spirobifluorenes

Flexible anodic bonding for the bonding between elastomer and metal

Hyperbranched Polymers for Organic Semiconductors

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