Article
Chemistry, Multidisciplinary
Chunbo Bo, Qingqing Bu, Jichang Liu, Bin Dai, Ning Liu
Summary: The oxidation of the C-H bond is a significant method in organic synthesis and pharmaceutical chemistry, and the development of a green and efficient catalytic protocol for this oxidation is highly desired. In this study, a light-induced strategy for benzyl oxidation was described, which utilized Eosin Y as a photocatalyst, water as a solvent, and O-2 as an oxidant.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Engineering, Environmental
Juanjuan Li, Meng Zhang, Ehiaghe Agbovhimen Elimian, Xuelong Lv, Jing Chen, Hongpeng Jia
Summary: A broadband solar collector with integrated photocatalysis and thermocatalysis capabilities was developed for efficient VOCs control; experimental results showed high toluene conversion and CO2 yield under low illumination conditions.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Organic
Bumpei Maeda, Yota Sakakibara, Kei Murakami, Kenichiro Itami
Summary: This article presents photoredox-catalyzed C-O bond formation reactions, enabling the diverse transformation of pharmaceuticals through decarboxylative esterification and C-H bond conversion.
Article
Chemistry, Physical
Meng Zhang, Hui Gao, Jing Chen, Ehiaghe Agbovhimen Elimian, Hongpeng Jia
Summary: Photothermocatalysis is a promising approach for efficient catalytic reactions, and this study presents the synthesis of a carbon nitride-induced urchin-like catalyst with enhanced photothermal catalytic performance. The catalyst exhibits good catalytic activity under full spectrum irradiation, with high toluene conversion and CO2 yield. Light irradiation enhances the light-driven thermocatalytic performance by activating lattice oxygen and inducing the formation of oxygen vacancies.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Multidisciplinary
Zhong-Wei Hou, Ding-Jin Liu, Peng Xiong, Xiao-Li Lai, Jinshuai Song, Hai-Chao Xu
Summary: This study reports a site-selective electrochemical amination reaction that can convert benzylic C-H bonds into C-N linkages without the need for external oxidants or metal catalysts. The success lies in using HFIP as a co-solvent to modulate the oxidation potentials of the substrate and product, avoiding overoxidation of the latter.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Raghunath Reddy Anugu, John R. Falck
Summary: In this study, benzylic/allylic alcohols are converted to anilines and/or nitriles as well as N-heterocycles via a site-selective C(sp(2))-C(sp(3)) cleavage reaction using commercial hydroxylamine-O-sulfonic acid (HOSA) and Et3N in a simple, one-pot process. It is noteworthy that cyclic benzylic/allylic alcohols undergo bis-functionalization, leading to increased complexity and step-economy.
Article
Chemistry, Organic
Yingying Hu, Yu Shao, Shuwei Zhang, Yuan Yuan, Zheng Sun, Yu Yuan, Xiaodong Jia
Summary: A sp(3) C-H bond functionalization and C - C bond cleavage were achieved using the AIBN/0 2 catalyst system, providing a series of benzophenones under mild reaction conditions. The mechanistic study revealed the involvement of a peroxide intermediate in this transformation, with the sp(3) C-C bond being cleaved through peroxide rearrangement in the case of diphenylmethanes, offering a potential new strategy for cleaving strong C-C bonds and extending to more general C-C bond activation.
TETRAHEDRON LETTERS
(2021)
Article
Engineering, Chemical
Zhang-Jun Bai, Xi-Ping Tan, Lang Chen, Biao Hu, Yu-Xuan Tan, Yu Mao, Sheng Shen, Jun-Kang Guo, Chak-Tong Au, Zhi-Wu Liang, Shuang-Feng Yin
Summary: By modifying the lead-free perovskite Cs3Bi2Br9 with a proper amount of Sb, this study achieved enhanced optical absorption and hole generation, leading to the activation and selective oxidation of toluene C-H bonds in photocatalytic reactions. Density functional theory calculations and isotopic labelling results confirmed the crucial role of Cs3Bi1.8Sb0.2Br9 in the dissociation of toluene, achieving the highest conversion rate under visible light ever reported.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Bowen Hu, Haoqiang Zhao, Yu Wu, Patrick J. Walsh
Summary: A novel, selective and high-yielding palladium-catalyzed carbonylative arylation of weakly acidic benzylic and heterobenzylic C(sp(3))-H bonds with aryl bromides has been achieved. The system allows access to diverse alpha-aryl or alpha,alpha-diaryl ketones, which are commonly found in biologically active compounds. The use of Josiphos SL-J001-1-based palladium catalyst enables the carbonylative arylation without the formation of direct coupling byproducts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Shutao Sun, Yingang Ma, Ziqiang Liu, Lei Liu
Summary: A novel manganese-catalyzed oxidative kinetic resolution method was reported, which effectively reacts asymmetric C(sp(3))-H oxidation to distinguish different types of cyclic benzylic ethers with wide application prospects and high enantiodiscrimination efficiency. This study further explores the direct late-stage oxidative kinetic resolution of bioactive molecules that are otherwise difficult to access.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Guangming Wang, Xiaowei Mu, Ruike Tan, Ziye Pan, Jiayang Li, Qingyun Zhan, Rong Fu, Shuyan Song, Lu Li
Summary: A highly desirable technology for the low-carbon and atom-economical production of H2 and value-added chemicals, nonoxidative conversion of methane (NOCM) under mild conditions was achieved using CeO2 nanoisland patterns on the surface of Ce-Zr solid solutions. These patterns facilitated methane adsorption and activation, leading to the highest methane conversion rate for photocatalytic NOCM to date. The photocatalyst also demonstrated a reversible and cooperative photoactivation process, enhancing its photoexcited charge separation efficiency and photocatalytic NOCM activities.
Article
Chemistry, Organic
Kohsuke Ohmatsu, Ryuhei Suzuki, Hiroki Fujita, Takashi Ooi
Summary: In this study, a photoinduced catalytic C(sp3)-H alkylation of benzylic fluorides was developed. The use of zwitterionic 1,2,3-triazolium amidate as a hydrogen-atom transfer catalyst proved uniquely effective for promoting this transformation, enabling 1,1-difunctionalization of benzylic fluorides and providing rapid access to a variety of functionalized molecular entities.
Review
Chemistry, Organic
Cai Chenyi, Zou Dong
Summary: This article summarizes the progress in benzylic C(sp(3))-H functionalization of toluene and its derivatives under different catalytic conditions in the past decade. The reactions substrate compatibility, mechanism, applications, advantages, and limitations in this field are also discussed in detail.
CHINESE JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Pengfei Han, Xin Mao, Yichao Jin, Sarina Sarina, Jianfeng Jia, Eric R. Waclawik, Aijun Du, Steven E. Bottle, Jin-Cai Zhao, Huai-Yong Zhu
Summary: Selective activation of specific C(sp(3))-H bond and cleavage of unreactive ether C-beta-O bond can be achieved by illuminated plasmonic silver metal nanoparticles. This plasmon-driven process enables hydrogen abstraction and precise scission of targeted C-O bond, resulting in the formation of aromatic compounds with unsaturated, substituted groups in excellent yields.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Applied
Monica Oliva, Guglielmo A. Coppola, Erik V. Van der Eycken, Upendra K. Sharma
Summary: This review discusses recent advances in benzylic C-H functionalization using organic radical strategies involving photochemistry and electrochemistry as sustainable tools. The potential and prospects of this field are highlighted, along with mechanistic details of typical reactions to aid researchers in exploring new discoveries and opportunities.
ADVANCED SYNTHESIS & CATALYSIS
(2021)
Article
Statistics & Probability
Ting Tian, Jingwen Zhang, Shiyun Lin, Yukang Jiang, Jianbin Tan, Zhongfei Li, Xueqin Wang
Summary: This study utilized interventions implemented in China and applied them to simulate the potential outcomes in South Korea, Italy, and the United States. The results showed that mild interventions in the early stage were effective in controlling the epidemic, while stricter measures were necessary for severe outbreaks.
JOURNAL OF APPLIED STATISTICS
(2023)
Article
Computer Science, Artificial Intelligence
Jiangxin Yang, Lingyu Wang, Lifei Ren, Yanpeng Cao, Yanlong Cao
Summary: This paper proposes an end-to-end light field angular super-resolution network by exploiting structure and scene information to mitigate the trade-off between angular and spatial resolution. It utilizes a Light Field ResBlock to extract epipolar plane image features and scene features, and employs 4D deconvolution to upsample the angular resolution based on these features. The refinement network further exploits LF structure and scene information to alleviate artifacts induced by too little angular information.
APPLIED INTELLIGENCE
(2023)
Article
Computer Science, Artificial Intelligence
Yanpeng Cao, Xi Tong, Fan Wang, Jiangxin Yang, Yanlong Cao, Sabin Tiberius Strat, Christel-Loic Tisse
Summary: This paper proposes a method for enhancing low-light visible images by utilizing complementary edge/texture features from thermal images. The proposed TGLLE-Net, which incorporates a CDC-MRF module and a TGCB module, effectively extracts and enhances features from both visible and thermal channels. Experimental results demonstrate that TGLLE-Net outperforms existing methods in terms of restoration accuracy, visual perception, and computational efficiency.
Article
Computer Science, Artificial Intelligence
Yanlong Cao, Lingyu Wang, Lifei Ren, Jiangxin Yang, Yanpeng Cao
Summary: This paper proposes a view position prior-supervised light field angular super-resolution network to improve the trade-off between angular and spatial resolution in light field imaging. The asymmetric feature extraction block and spatial-angular interaction module are introduced to enhance feature extraction and establish view correlations. Experimental results demonstrate the superiority of the proposed method in various datasets.
Article
Engineering, Electrical & Electronic
Junwen Zhang, Guoqiang Li, Sizhe Xing, Nan Chi
Summary: With the adoption of the single-wavelength 50G PON standard, research on the next-generation optical access network beyond 50G has begun. Coherent passive optical network (C-PON) based on multi-access coherent optics and DSP is a promising candidate for future high-speed PON, thanks to its superior sensitivity. This paper reviews recent studies and progress on flexible C-PON in terms of access speed, multiple-access architecture, and deployment scenarios.
OPTICAL FIBER TECHNOLOGY
(2023)
Article
Optics
Yanlong Cao, Wenbin Zhu, Jiangxin Yang, Guizhong Fu, Dongyun Lin, Yanpeng Cao
Summary: Visual surface defect inspection is important for assessing product quality in various industrial applications, but it remains challenging to develop deep-learning-based approaches for industrial product defect inspection. To overcome this challenge, we propose a light-weight defect classification model based on pre-trained SqueezeNet architecture and introduce three effective techniques to achieve high accuracy with limited defective training samples. Experimental results validate the effectiveness of our method.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Optics
Yanpeng Cao, Rui Liang, Wenbin Zhu, Bowen Zhao, Haotian Chen, Lingfeng Shen, Jiangxin Yang, Yanlong Cao, Jian Chen, Xin Li
Summary: This paper presents a complete framework for rendering and processing dynamic-excitation-based steady-state NLOS images. A virtual rendering pipeline is constructed to generate large-scale rendered images, and a physical hardware setup is built to acquire real-captured images. An end-to-end multi-branch CNN is proposed to reconstruct specular-reflected images of hidden objects. The effectiveness of the method is validated through qualitative and quantitative experiments.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Computer Science, Artificial Intelligence
Zewei He, Du Chen, Yanpeng Cao, Jiangxin Yang, Yanlong Cao, Xin Li, Siliang Tang, Yueting Zhuang, Zhe-ming Lu
Summary: This study proposes an efficient model, SISR-PF-OA, for single image super-resolution, achieving more accurate and faster image restoration by improving feature extraction and fusion techniques. It includes a novel Orientation-Aware feature extraction/selection Module (OAM) and an effective fusion architecture to progressively integrate multi-scale features extracted in different convolutional stages.
PATTERN RECOGNITION
(2023)
Correction
Cell Biology
Xiaodong Su, Yuan Xie, Junwen Zhang, Mingxin Li, Qing Zhang, Guishan Jin, Fusheng Liu
CELL DEATH & DISEASE
(2023)
Article
Physics, Applied
Yingzhe Wang, Xuefeng Zheng, Tian Zhu, Shaozhong Yue, Ailing Pan, Shengrui Xu, Peixian Li, Xiaohua Ma, Jincheng Zhang, Lixin Guo, Yue Hao
Summary: Degradation and defect evolution in GaN-based UV LEDs under 3 MeV proton irradiation were investigated thoroughly in this study. An intrinsic C-N-related defect with an abnormally decreased concentration after irradiation was identified. A defect evolution model under proton irradiation was established: C atoms departed from the C-N-related defect aligned along the dislocation in the active region stimulated by the displacement damage effect, leaving behind a nitrogen vacancy (V-N) aligned along the dislocation, accompanied by the generation of a non-interacting carbon interstitial (C-i). The increase in V-N and C-i jointly contributed to the decrease in optical power and the increase in leakage current.
APPLIED PHYSICS LETTERS
(2023)
Article
Automation & Control Systems
Wenbin Zhu, Rui Liang, Jiangxin Yang, Yanlong Cao, Guizhong Fu, Yanpeng Cao
Summary: In recent years, diverse detection methods have been proposed to achieve highly accurate image segmentation. However, low contrast and background noise interference still pose challenges to defect detection. Existing deep learning-based methods for defect detection mostly learn rich features on the whole image.
ENGINEERING APPLICATIONS OF ARTIFICIAL INTELLIGENCE
(2023)
Article
Engineering, Electrical & Electronic
Wenqing Niu, Zengyi Xu, Yu Liu, Xianhao Lin, Jifan Cai, Jianyang Shi, Xiaolan Wang, Guangxu Wang, Jianli Zhang, Fengyi Jiang, Zhixue He, Shaohua Yu, Chao Shen, Junwen Zhang, Nan Chi
Summary: Nowadays, there is a growing demand for high-speed information transmission. Visible light communication (VLC) based on light-emitting diodes (LEDs) is considered a prospective candidate for future 6G communication networks. However, VLC systems face challenges due to limited modulation bandwidth and nonlinear characteristics of optoelectronic devices. This paper outlines the current state and challenges of VLC and introduces key technologies for high-speed VLC systems based on silicon (Si) substrate LED. The paper presents an ultrahigh-speed VLC system with an overall data rate of 28.93 Gbit/s, achieved through optimized LED arrays and advanced digital signal processing methods.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Jianyang Shi, Wenqing Niu, Ziwei Li, Chao Shen, Junwen Zhang, Shaohua Yu, Nan Chi
Summary: This paper proposes a neural network-based auto equalization model (NNAEM) for achieving high-speed underwater visible light communication (VLC) with a bandwidth-limited green LED. Experimental results show that the proposed method enables a data rate of 3.451 Gbps in an underwater VLC link, which is an improvement of 30.4% compared to other advanced digital signal processing (DSP) methods. The scenario adaptation and robustness of the NNAEM are also verified, demonstrating its importance in underwater high-speed VLC transmission.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Computer Science, Hardware & Architecture
Sizhe Xing, Guoqiang Li, An Yan, Wangwei Shen, Zhongya Li, Jiaye Wang, Jianyang Shi, Zhixue He, Nan Chi, Junwen Zhang
Summary: The coherent passive optical network (CPON) has gained attention due to its superior performance. Probabilistic shaping (PS) has been introduced for adaptive rate adjustment in flexible coherent passive optical networks (FLCS-CPON). However, the classical probabilistic shaping (CPS) technology is less efficient in CPON systems without optical amplifiers. This study explores the use cases of PS in FLCS-CPON and demonstrates a hybrid PS-based FLCS-CPON without optical amplifiers, achieving higher peak rate and dynamic range improvement.
JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING
(2023)
Article
Gastroenterology & Hepatology
Peng Li, Zheng Zhang, Sheng Wang, Zhendong Jin, Yiqi Du, Aiming Yang, Yunlu Feng, Xiaoping Zou, Lei Wang, Xiaoyan Wang, Li Tian, Pinghong Zhou, Yiqun Zhang, Jun Liu, Zhen Ding, Junwen Zhang, Jian Yang, Siyu Sun, Shutian Zhang
Summary: This study evaluated the safety and efficacy of the Hot AXIOS system for PFC drainage in a multicenter Chinese cohort. The results showed that stent placement was successful in all patients and 93.3% of patients achieved clinical success within 60 days after surgery. The study found that a previous pancreatitis attack > 6 months prior was associated with a greater chance of achieving 100% remission of PFCs within 1 month.
ENDOSCOPIC ULTRASOUND
(2023)
Article
Chemistry, Physical
Yifan Sun, Ye Lv, Wei Li, Jinli Zhang, Yan Fu
Summary: In this study, PtRu electrocatalysts were fabricated on carbon paper via cyclic electrodeposition for the electrocatalytic hydrogenation (ECH) of phenol. The Pt3Ru3 catalyst exhibited excellent activity and stability for the conversion of phenol to cyclohexanol at ambient temperature and various current densities. The in situ Raman spectroscopy and kinetic study revealed the hydrogenation mechanism of phenol over Pt3Ru3 in acidic electrolyte, providing an effective electrochemical strategy for the facile construction of durable electrode materials and efficient phenol hydrogenation.
JOURNAL OF CATALYSIS
(2024)
Article
Chemistry, Physical
Amir Shahzad, Khezina Rafiq, Muhammad Zeeshan Abid, Naseem Ahmad Khan, Syed Shoaib Ahmad Shah, Raed H. Althomali, Abdul Rauf, Ejaz Hussain
Summary: Photocatalytic hydrogen production through water splitting is an effective method for meeting future energy demands. In this study, researchers synthesized a 1 % Ag2S/Cu2S co-doped CdZnS catalyst and found that it can produce hydrogen at a higher rate. The co-doping of Ag2S and Cu2S in the CdZnS catalyst showed a synergistic effect, with Ag2S promoting oxidation reactions and Cu2S promoting reduction reactions.
JOURNAL OF CATALYSIS
(2024)
