Article
Engineering, Environmental
Xiuhui Huang, Yangmei Zhou, Youlian Zeng, Xi Chen, Fangfang He, Ting Wang, Donghui Lan, Wei Liu, Songting Tan, Ping Gao
Summary: Organic electrode materials have great potential in electrochemical energy storage devices due to their adjustable structure, low cost, and eco-friendliness. However, they often suffer from low electronic conductivity and high solubility. In this study, electron-donating and electron-withdrawing groups were functionalized on a porphyrin molecule to decrease solubility and regulate redox potential. Two novel cathodes, CuDETMP and CuDETCP, were synthesized and showed promising electrochemical performance with high reversible capacity and cycling stability. The study also provides insights into the correlation between substituents and electrochemical performance, offering a novel strategy for the design of high-energy rechargeable organic lithium batteries.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Spectroscopy
Lu Chen, Haixiang He, Xindi Huang, Honghong Xu, Yan Yu
Summary: In this study, the fluorescence mechanism of (E)-4-(3-(benzo[d]thiazol-2-yl)-2-hydroxy-5-methylstyryl)-1-methylpyridin-1-ium (HBTMY) and the excited-state intramolecular proton transfer process (ESIPT) of hydroxyphenyl were investigated using density functional theory (DFT) and time-dependent density functional theory (TDDFT). The effects of electron-donating and electron-withdrawing groups on the fluorescence and the ESIPT process were studied by introducing different substituents into HBTMY. The results provide guidance for cell imaging and strategies to adjust and control fluorescence by introducing substituents.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Engineering, Electrical & Electronic
Dinda Fariesta Nugraha, Danbi Kim, Eunhye Yang, Seok Woo Lee, Dong Ryeol Whang, Sang A. Lee, Sung Heum Park, Dong Wook Chang
Summary: A series of quinoxaline-based D-A-type polymers with electron-withdrawing or electron-donating groups were developed and their impact on photovoltaic efficiency was explored. By modifying the quinoxaline unit of a reference polymer, two objective polymers were obtained with extra fluorine atoms and methoxy units. These polymers demonstrated distinct optical, electrochemical, and morphological features due to the influence of the electron-withdrawing or electron-donating substituents. Furthermore, nonfullerene photovoltaic devices based on these polymers exhibited significantly higher power conversion efficiencies compared to the reference polymer, highlighting the importance of the substituted groups in controlling the intrinsic and photovoltaic attributes of quinoxaline-based polymers.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Dinda Fariesta Nugraha, Danbi Kim, Eunhye Yang, Seok Woo Lee, Dong Ryeol Whang, Sang A. Lee, Sung Heum Park, Dong Wook Chang
Summary: A series of quinoxaline-based D-A-type polymers with electron-withdrawing or electron-donating groups were developed to study their impact on photovoltaic efficiency. Two objective polymers, PBF-CF(3)QxF and PBF-CF(3)QxM, were obtained by selectively adding fluorine atoms and methoxy units on the 6,7-positions of the quinoxaline unit of the reference polymer PBF-CF3Qx. Due to the influence of these substituents, each polymer exhibited distinct optical, electrochemical, and morphological features. Furthermore, the nonfullerene photovoltaic devices based on PBF-CF(3)QxF and PBF-CF(3)QxM showed higher power conversion efficiencies of 11.37% and 11.18%, respectively, compared to the device based on the reference polymer (6.96%). These results highlight the importance of electron-withdrawing and electron-donating substituents in quinoxaline-based polymers for controlling their intrinsic and photovoltaic attributes.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Analytical
Nian Xiao, Liang Wang, Hongying Wang, Sufang Wang, Tao Zhu
Summary: Four novel EWG/EDG-GO-o-MWCNTs nanocomposites were successfully synthesized and characterized by FTIR and EDX. The static adsorption experiments showed different adsorption capacities for furosemide, indicating that these nanocomposites could easily adsorb the target substance through hydrogen bonding and pi-pi interactions. The results suggest that the pi system of GO can be modified by EWG and EDG, impacting the electron transfer rate and density of GO.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Applied
Jiyoung Hwang, T. Sheshashena Reddy, Hyungkyu Moon, Hae Dong Lee, Myung-Seok Choi
Summary: In this study, dicyanovinylporphyrins (DCVPs) 2a to 2d were synthesized and used as fluorescent sensors for cyanide (CN-) detection. The reactivity of DCVPs to CN- was controlled by introducing electron-donating or electron-withdrawing groups. The sensing abilities of DCVPs for various anions were studied, and it was found that DCVPs exhibited selective reduction in fluorescence intensity upon the addition of CN- ions. DCVP 2d showed strong detection capabilities for CN- ions, with a detection limit of 3.14 x 10-8 M in THF.
Review
Chemistry, Organic
Lichao Li, Xiuna Zhu, Shang Sun, Chaoyue Zhang, Bingxin Yang, Shuang Liu, Zhenbo Liu
Summary: Organic light emitting diodes (OLEDs) are devices that emit light using organic semiconductor materials under an electric field. They have advantages such as flexibility, low-temperature resistance, wide field of view, and low energy consumption, and have been widely used in display and lighting applications. This paper reviews the research status of blue organic electroluminescent materials in the past five years from different molecular structures, discusses their photoelectric properties and device performance, analyzes the advantages of molecular design and device production, and proposes improvement methods for blue OLED light-emitting materials.
CURRENT ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Peili Gao, Zinan Chen, Shuming Chen
Summary: This study investigates the degradation mechanism of blue quantum-dot light-emitting diodes (B-QLEDs) and reveals the accumulation of electrons in the quantum-dots (QDs) as the main cause of device degradation. The accumulated electrons induce the detachment of ligands and degrade the hole transport layer (HTL), while surface defects and HTL decomposition also contribute to B-QLEDs' stability.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Chen Zhang, Ruige Su, Yongchun Guo, Debao Li, Jiaqin Zhao, Yuling Zhao, Tianzhi Yu
Summary: Four hybrids with alkoxyorganosilane functional groups were synthesized by grafting phenanthroimidazole-carbazole and phenanthroimidazole-phenothiazine units into alkoxyorganosilanes. These organic/inorganic hybrids showed good photophysical properties and excellent thermal stability. The non-doped device based on the phenanthroimidazole-phenothiazine hybrid exhibited the highest efficiency.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Materials Science, Multidisciplinary
Junlei Liu, Weiwei Hou, Ruoteng Xu, Yijing Gao, Lintie Xu, Linxiang Jiang, Cheng Zhang
Summary: In this study, a series of donor-acceptor-conjugated monomers were designed and synthesized, and the effects of different acceptors on the structure and electrochemical performance of the polymers were studied. The results showed that the introduction of electron-withdrawing groups changed the spatial structures of the monomers and led to different electrochemical behaviors of the polymers.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Vinay S. Sharma, Anuj S. Sharma, Venkata Subba Rao Ganga, Pranav S. Shrivastav, Priyanka A. Shah, Nikhil Agarwal
Summary: A new class of highly efficient blue emitters, designed with good thermal stability and a broad range of columnar hexagonal phases, have been characterized. These materials exhibit blue-light emission in solid thin films and solution state, with the thermal behavior and stability of the mesophase influenced by the number of alkoxy side chains substituted at terminal positions.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Inorganic & Nuclear
Logan J. Augustine, Joseph M. Kasper, Tori Z. Forbes, Sara E. Mason, Enrique R. Batista, Ping Yang
Summary: Neptunium is the major minor actinide in spent nuclear fuel, and its difficult separation is due to its redox chemistry. Understanding Np oxidation state and ligand interactions is crucial for developing new reprocessing techniques. Ligands with carboxylate or pyridine functional groups are preferred in emerging technologies. DFT calculations are used to study neptunyl cation interactions with carboxylate and polypyridine ligands and investigate the effects of different electron-withdrawing and electron-donating R groups on geometric properties and bonding in Np ligand design principles.
INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Sook Hee Jeong, Seung Chan Kim, Jun Yeob Lee
Summary: In this study, two carbazole-benzonitrile-based bipolar hosts, 3-CzPB and 4-CzPB, were proposed to improve the efficiency of blue phosphorescent organic light-emitting diodes (PhOLEDs). The efficient hole and electron transport properties of these hosts demonstrated their effective bipolar host characteristics. Blue PhOLEDs using the 3-CzPB host achieved high external quantum efficiencies in sky-blue and deep-blue devices, and 3-CzPB-hosted blue TADF and multi-resonance TADF devices also achieved high external quantum efficiencies. This study highlights the potential use of the 3-CzPB host as a universal host for blue organic light-emitting diodes.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Jie Zhang, Suoping Peng, Shaohui Zheng
Summary: In this study, a series of subAPPC derivatives were modeled by substituting different electron donating and/or withdrawing groups, showing potential as donor or acceptor materials in organic solar cells. By controlling the physical and optical properties through group substitutions, the energy conversion efficiency of these derivatives could be improved.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Peili Gao, Jianing Wang, Lunhui Wang, Dan Wang, Wen Peng, Shuhua Zou, Yueqi Mo, Yong Zhang
Summary: Using polyfluorene with carbazole units as hole-transporting layers has led to highly efficient and stable blue quantum-dot light-emitting diodes. The PFCz HTL showed improved current efficiency and external quantum efficiency compared to the PVK HTL, with lower turn-on voltage and longer device lifetime. This demonstrates the potential of polyfluorenes with pendent carbazole groups as promising materials for enhancing the performance of blue QD-LEDs.
ORGANIC ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Christos L. Chochos, Andreas S. Kalogirou, Tengling Ye, Elisavet Tatsi, Athanasios Katsouras, Georgia A. Zissimou, Vasilis G. Gregoriou, Apostolos Avgeropoulos, Panayiotis A. Koutentis
JOURNAL OF MATERIALS CHEMISTRY C
(2018)
Article
Nanoscience & Nanotechnology
Tengling Ye, Wenbo Chen, Shan Jin, Sue Hao, Xiaochen Zhang, Hongcheng Liu, Dongqing He
ACS APPLIED MATERIALS & INTERFACES
(2019)
Article
Nanoscience & Nanotechnology
Tengling Ye, Qiao Wang, Changhao Tian, Ranbir Singh, Yaping Zhang, Zhiwei Liu, Xikui Fang, Dongqing He
ADVANCED ELECTRONIC MATERIALS
(2020)
Article
Energy & Fuels
Tengling Ye, Shan Jin, Ranbir Singh, Manish Kumar, Wenbo Chen, Daizhe Wang, Xiaoru Zhang, Wenxu Li, Dongqing He
Review
Chemistry, Applied
Tengling Ye, Xiaochen Sun, Xiaoru Zhang, Sue Hao
Summary: Perovskite solar cells (PSCs) have gained significant attention in the past decade due to their high efficiency and low cost, with the power conversion efficiency increasing rapidly. Inorganic Cu-based p-type semiconductors are important for PSCs, offering advantages like variety, low cost, good mobility, adjustable energy levels, stability, low temperature processing, and scalability. Challenges and future trends in Cu-based inorganic HTMs and interface engineering in PSCs were analyzed.
JOURNAL OF ENERGY CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Dongqing He, Ping Yu, Daizhe Wang, Lijie Wang, Xingyue Wang, Qi Wang, Xiaochen Zhang, Tengling Ye
Summary: The study successfully prepared ZnO foam with high specific surface area and demonstrated its in-situ growth characteristics on different substrates. Using a flexible carbon cloth/ZnO foam (C-ZnO) Janus absorber, a high rate of water evaporation (2.4 kg m^(-2) h^(-1)), which is 4.6 times higher than that of natural evaporation, was achieved.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Physical
Tao Wu, Daizhe Wang, Yi Lu, Zhi Zheng, Fengyun Guo, Tengling Ye, Shiyong Gao, Yong Zhang
Summary: Two new perylenediimide oligomers, PDI-D and PDI-T, are reported as efficient multifunctional cathode interfacial layers in inverted PVSCs. The PVSC with PDI-T as a CIL exhibits promising power conversion efficiency and stability.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Tao Wu, Daizhe Wang, Xingjian Jiang, Xianxian Ge, Fengyun Guo, Tengling Ye, Shiyong Gao, Yong Zhang
Summary: In inverted perovskite solar cells, n-doping fullerene electron transport layers have been found to prepare high efficiency devices. Two cathode interface layers, 2PDI-FN and 2PDIT-FN, with dimethylamino functional groups and PDI units, can significantly improve device efficiency. This molecular design approach provides a direction for the preparation of high-performance inverted perovskite solar cells.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Tao Wu, Daizhe Wang, Xingjian Jiang, Fengyun Guo, Tengling Ye, Shiyong Gao, Yong Zhang
Summary: In this study, a perylene diimide (PDI) and fluorene-based cathode interface layer (CIL) material, 2PDINT-FN, with four dimethylamino functional side chains, was reported for highly efficient inverted perovskite solar cells (PVSCs). The 2PDINT-FN exhibited high electrical conductivity, electron mobility, self-doping, and interfacial dipole properties due to the dimethylamino groups in both PDI and fluorene side chains. The power conversion efficiency (PCE) of the inverted PVSCs with 2PDINT-FN as a CIL reached 20.03% and was further improved to 21.85% with the addition of N-DMBI as a dopant, accompanied by enhanced current density and fill factor.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Polymer Science
Wenhao Li, Jingyu Jia, Xiaochen Sun, Sue Hao, Tengling Ye
Summary: With the development of electronic skin (e-skin), the possibility of creating multifunctional e-skin that surpasses the capabilities of human skin has garnered attention. This study successfully developed a light/pressure bifunctional sensor using CsPbBr3 quantum dots film-based photodetectors and PEDOT: PSS-coated cellulose paper-based pressure sensors. These sensors were integrated into flexible e-skin, allowing for simultaneous detection of light and pressure stimuli. The high photosensitivity and motion monitoring capabilities of these flexible bifunctional sensors demonstrated the feasibility of introducing perovskite photodetectors into e-skins, offering a new direction for the development of flexible multi-functional e-skin.
Review
Polymer Science
Wei Zhao, Jianguo Zhang, Fanjun Kong, Tengling Ye
Summary: This paper briefly describes the structure and basic properties of halide perovskite nanocrystals (PNCs) and summarizes the water stabilization methods. It reviews the recent advances of PNCs as fluorescent probes for detecting hazardous substances in agriculture and food, discussing the detection effect and mechanism. Lastly, it summarizes and prospects the problems and solutions faced by PNCs as fluorescent probes in agriculture and food.
Article
Chemistry, Applied
Daizhe Wang, Cong Kang, Tengling Ye, Dongqing He, Shan Jin, Xiaoru Zhang, Xiaochen Sun, Yong Zhang
Summary: A nanoionene polymer was synthesized and used as a cathode interlayer in inverted perovskite solar cells to enhance interface contact, reduce energy level barriers, and prevent ion migration. The polymer, combined with bathophenantroline as a cathode interlayer, resulted in a higher efficiency device. Furthermore, the mixed cathode interlayer significantly enhanced resistance to ions and moisture, leading to improved device stability.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Engineering, Environmental
Tengling Ye, Xinyu Zhang, Jinqiao Wen, Xiaochen Sun, Dongqing He, Wenxu Li
Summary: In this paper, a visualized electronic skin based on a poly (ionic liquid) ionogel was designed and fabricated, which demonstrated various fascinating visual functions. The integration of ionogel and lithium salt resulted in an e-skin exhibiting both electrical and optical responses to external strain, showing great potential for use in chemical environmental monitoring robotics, wearable electronic devices, and human-computer interaction.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Physical
Daizhe Wang, Tengling Ye, Yong Zhang
JOURNAL OF MATERIALS CHEMISTRY A
(2020)
Article
Materials Science, Multidisciplinary
Ranbir Singh, Min Kim, Jae-Joon Lee, Tengling Ye, Panagiotis E. Keivanidis, Kilwon Cho
JOURNAL OF MATERIALS CHEMISTRY C
(2020)
Article
Polymer Science
Yuanzhang Jiang, Xuyi Wang, Yanting Han, Dakai Gong, Yingchun Gu, Lin Tan
Summary: In this study, FeCl3 and poly(acrylic acid) (PAA) were doped into waterborne polyurethanes (WPUs) to create multifunctional materials with self-healing and antimicrobial properties. WPU/Fe/PAA-5.5, containing 5.5 wt % PAA, exhibited excellent mechanical properties, strong self-healing capabilities, and an impressive antimicrobial rate of over 90%. These supramolecular films were also highly recyclable through hot-pressing.
Article
Polymer Science
Longyu Tian, Min Wang, Guangming Liao, Baoliang Liu, Sujuan Zhang, Yucheng Sun, Zhen Meng, Jintao Zhang, Zaijun Lu
Summary: Two kinds of benzoxazine monomers were synthesized and used to prepare polybenzoxazine anion exchange membranes (AEMs) with quaternary ammonium functionalization. The LQPBZ AEM exhibited better ion conductivity and alkaline stability.
Article
Polymer Science
Claire A. Lemarchand
Summary: This study investigates the shock behavior of three different polymers through molecular dynamics simulations. The results reveal specificities in the shock behavior of polymers, including deviations from the linear relation between shock velocity and particle velocity, as well as differences in shear stress relaxation behind the shock front. It is found that the deviation of the Hugoniot locus is related to the change in the relative contribution of bonding and non-bonding potential energies, while polymers with higher glass transition temperatures exhibit slower shear stress relaxation.
Article
Polymer Science
Zengquan Liu, Xiaochun Yin, He Zhang, Shuo Gao, Qinglin Kuang, Yanhong Feng
Summary: A powder solid-state extension (PSSE) technology was proposed to address the high melt viscosity issue of UHMWPE. By uniaxial extension and sintering in the solid state, a highly self-reinforced material was prepared. X-ray diffraction and scattering techniques were used to study the structural evolution during the PSSE process, and a solid-phase induced transformation model was established.
Article
Polymer Science
Zhike Li, Anyu Luo, Rui Zhou, Xin Li, Haiyan Li
Summary: A novel high temperature resistance IL@SiO2 nanocapsules were successfully prepared and their friction and wear properties in PA6 composites were studied. The addition of IL@SiO2 nanocapsules reduced the friction coefficient and wear rate without affecting the mechanical properties of PA6. The synergy between the IL core and SiO2 wall in the nanocapsules improved the self-lubricating performance of the PA6 composites.
Article
Polymer Science
Xin Liu, Xuhong Guo, Qi Liao
Summary: In this study, an algorithm for accurately estimating viscosity is developed using molecular dynamics simulations and the Green-Kubo formula. This algorithm can be applied to complex systems with long correlations, such as macromolecular and biological simulation systems.
Article
Polymer Science
Hao Pu, Yun-Lei Hou, Jing -Zhou Chen, Dong -Lin Zhao
Summary: The use of modified graphene improves the interfacial adherence of carbon fibers to epoxy resin, resulting in enhanced interfacial and bending properties of CF and matrix in CF/EP composites, as well as increased interlaminar shear strength and flexural strength.
Article
Polymer Science
Wei-Chung Ke, Jin-Wei Lin, Manohar Reddy Busireddy, Yueh-Hsing Lee, Jiun-Tai Chen, Chain-Shu Hsu
Summary: This study introduces a crosslinkable monomer, TAIC, to synthesize three crosslinked polyimide films, which exhibit improved thermal, mechanical, and dielectric properties. The introduction of TAIC enhances the tensile strength, reduces the dielectric constant and dielectric loss, and decreases the coefficient of thermal expansion of the polyimide films.
Article
Polymer Science
Alex Kwasi Kumi, Ruiling Fan, Ye Chen, Yumei Zhang
Summary: The difference in leaching of amylopectin from cellulose/amylopectin/1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) blends during regeneration in water and aqueous ethanol has been studied. Molecular dynamics simulations showed that the dissolution and regeneration mechanisms of amylopectin in [Bmim][Cl] are similar to cellulose in ionic liquids. Water regeneration leads to weak electrostatic interactions, resulting in high leaching of amylopectin. In contrast, ethanol-water interactions enhance electrostatic interactions among amylopectin chains, limiting amylopectin leaching in aqueous ethanol.
Article
Polymer Science
Xi Zeng, Junwei Zhou, Junbiao Peng, Chunsheng Zhang, Danling Wang, Yihu Song, Qiang Zheng
Summary: This study utilizes an oligomer deep eutectic solvent (DES) based on polyethylene glycol to regulate the vulcanization kinetics of rubber. The results show that the DES can accelerate vulcanization at low temperatures without affecting the crosslinking density and Mullins effect.
Article
Polymer Science
Qianqian Yue, Yongfei Peng, Xingjian Liu, Aihua He, Huarong Nie
Summary: The addition of metal deactivators can effectively suppress the aging of TBIR, prolong its lifespan, and have no negative effects on its physical and processing properties. These research findings are of great importance for improving the stability and aging resistance of polymers.
Article
Polymer Science
J. Gomez-Caturla, J. Ivorra-Martinez, R. Tejada-Oliveros, V Moreno, D. Garcia-Garcia, R. Balart
Summary: This work focuses on the development of environmentally friendly PLA formulations by using different esters derived from geraniol as plasticizers. The results show that these esters have good compatibility with PLA, and they can effectively enhance the elongation and plasticity of PLA, reduce its glass transition temperature, and slightly improve its water absorption capabilities.
Article
Polymer Science
Dandan Li, Zhaohui Lu, Zhao Ke, Ke Xu, Fengna Dai, Youhai Yu, Guangtao Qian, Chunhai Chen
Summary: In this study, cross-linked PI aerogel membranes with low dielectric constant and high moisture resistance were prepared by co-polymerization and scraping coating technology. The incorporation of fluorinated blocks and benzimidazole ring structures resulted in novel PI aerogel membranes with fascinating dielectric properties and outstanding moisture resistance.
Article
Polymer Science
Zhaoyang Chu, Qing Zhang, Haihua Luo, Han Zhou, Fapei Zhang, Wei Chen, Wenhua Zhang
Summary: Multi-physical fields solution processing strategy is a universal and facile method for preparing various conjugated polymer films and high-performance devices. In this study, we employed a combined microfluidic flow and ultrasonication strategy (FU) for processing CP solutions, and found a pronounced synergetic effect in promoting the pre-ordering of chains in solution. The conformation order and anisotropy of the solution were revealed through various characterizations. A non-classical nucleation model for polymer crystallization in non-equilibrium solution processing was confirmed. The roles of microfluidic flow and ultrasonication in chain aggregation and crystallization were addressed through multi-physical simulations. Compared to pristine solutions, the FU strategy showed improved solution anisotropy and crystallization kinetics, resulting in higher crystallinity in films and increased mobilities in OFET devices. The FU processing strategy provides a universal approach for regulating chain conformation and aggregation in conjugated polymer solutions.
