Synergy of Single‐ion Conductive and Thermo‐responsive Copolymer Hydrogels Achieving Anti‐Arrhenius Ionic Conductivity

Guo, Shan; Lei, Rongyuan; Liang, Xinmiao; Liu, Jiyan; Liu, Xueqing; Gao, Shuyu; Peng, Xianghong; Bian, Shilong; Chen, Yangwei; Jin, Yi; Cai, Shaojun; Liu, Zhihong; Feng, Jiwen

doi:10.1002/asia.201900051

Cited by 9 publications

(2 citation statements)

References 46 publications

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“…In other words, rates become somewhat larger at lower temperatures. In literatures, one can see many anti‐Arrhenius examples, for example heterogeneous catalysis, [58] ionic conductivity, [59] roaming dynamics, [60] bond cleavage, [61] to name just a few. It is also noteworthy that such anti‐Arrhenius behavior is also frequently observed in reaction dynamics of polyatomic molecules [62] .…”

Section: Resultsmentioning

confidence: 99%

Thermally Activated Delayed Fluorescence of a Dinuclear Platinum(II) Compound: Mechanism and Roles of an Upper Triplet State

Song

Peng

Chen

et al. 2022

Chemistry A European J

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A dinuclear Pt(II) compound was reported to exhibit thermally activated delayed fluorescence (TADF); however, the luminescence mechanism remains elusive. To reveal relevant excited-state properties and luminescence mechanism of this Pt(II) compound, both density function theory (DFT) and time-dependent DFT (TD-DFT) calculations were carried out in this work. In terms of the results, the S 1 and T 2 states show mixed intraligand charge transfer (ILCT)/metal-toligand CT (MLCT) characters while the T 1 state exhibits mixed ILCT/ligand-to-metal CT (LMCT) characters. Mechanistically, a four-state (S 0 , S 1 , T 1 , and T 2 ) model is proposed to rationalize the TADF behavior. The reverse intersystem crossing (rISC) process from the initial T 1 to final S 1 states involves two upconversion channels (direct T 1 !S 1 and T 2 -mediated T 1 !T 2 ! S 1 pathways) and both play crucial roles in TADF. At 300 K, these two channels are much faster than the T 1 phosphorescence emission enabling TADF. However, at 80 K, these rISC rates are reduced by several orders of magnitude and become very small, which blocks the TADF emission; instead, only the phosphorescence is observed. These findings rationalize the experimental observation and could provide useful guidance to rational design of organometallic materials with superior TADF performances.

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Section: Resultsmentioning

confidence: 99%

Thermally Activated Delayed Fluorescence of a Dinuclear Platinum(II) Compound: Mechanism and Roles of an Upper Triplet State

Song

Peng

Chen

et al. 2022

Chemistry A European J

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“…Recently, a number of studies have been conducted on stimuli-responsive conductive hydrogels, which can be used to realize the intellectualization of flexible sensors [14,15], drug release [16], and logical controllers [17]. Poly( N -isopropylacrylamide) (PNIPAM) was used to construct temperature-sensitive conductive hydrogels [17,18,19,20], which showed a good response to temperature and high electrical conductivity for making temperature-controlled switches [21,22].…”

Section: Introductionmentioning

confidence: 99%

Smart Composite Hydrogels with pH-Responsiveness and Electrical Conductivity for Flexible Sensors and Logic Gates

et al. 2019

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Stimuli-responsive conductive hydrogels have a wide range of applications due to their intelligent sensing of external environmental changes, which are important for smart switches, soft robotics, and flexible sensors. However, designing stimuli-responsive conductive hydrogels with logical operation, such as smart switches, remains a challenge. In this study, we synthesized pH-responsive conductive hydrogels, based on the copolymer network of acrylic acid and hydroxyethyl acrylate doped with graphene oxide. Using the good flexibility and conductivity of these hydrogels, we prepared a flexible sensor that can realize the intelligent analysis of human body motion signals. Moreover, the pH-responsive conductive hydrogels were integrated with temperature-responsive conductive hydrogels to develop logic gates with sensing, analysis, and driving functions, which realized the intellectualization of conductive hydrogels.

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Developing Single‐Ion Conductive Polymer Electrolytes for High‐Energy‐Density Solid State Batteries

Meng,

Ye,

Yang

et al. 2023

Adv Funct Materials

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Single‐ion conductive polymer electrolytes (SICPEs) with a cationic transference number (tLi+) close to unity exhibit specific advantages in solid‐state batteries (SSBs), including mitigating the ion concentration gradient and derived problems, suppressing the growth of lithium dendrites, and improving the utilization of cathode materials and the rate performance of SSBs. However, the application of SICPEs remains major challenges, i.e., the ionic conductivity is inferior at room temperature. Therefore, the recent accomplishments in improving the ambient ionic conductivity to be compatible SICPEs with a high transference number are discussed in this review. In particular, some strategies of delocalizing charges in polyanions, designing a highly conductive polymer matrix, and utilizing synergistic effects in SICPEs are focused to shed light on the further development of solid polymer electrolytes for SSBs. Finally, multifunctional species of SICPEs are discussed in view of the mechanical contact and/or charge transfer problems at the solid–solid interface in SSBs.

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Synergy of Single‐ion Conductive and Thermo‐responsive Copolymer Hydrogels Achieving Anti‐Arrhenius Ionic Conductivity

Cited by 9 publications

References 46 publications

Thermally Activated Delayed Fluorescence of a Dinuclear Platinum(II) Compound: Mechanism and Roles of an Upper Triplet State

Thermally Activated Delayed Fluorescence of a Dinuclear Platinum(II) Compound: Mechanism and Roles of an Upper Triplet State

Smart Composite Hydrogels with pH-Responsiveness and Electrical Conductivity for Flexible Sensors and Logic Gates

Developing Single‐Ion Conductive Polymer Electrolytes for High‐Energy‐Density Solid State Batteries

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