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Alternating current electrolysis:A photoredox catalysis mimic and beyond

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Green Synthesis and Catalysis

Green Synthesis and Catalysis 2022年第1期3卷 4-10页

作者： Junsong Zhong Chenglin Ding Hyunwoo Kim Terry McCallum keyin ye Institute of Pharmaceutical Science and Technology College of ChemistryFuzhou UniversityFuzhou 350108China Department of Chemistry and Nanoscience Ewha Womans UniversitySeoul 03760South Korea The Canadian Bank Note Company OttawaOntario 91758Canada State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen UniversityXiamen 361005China

Alternating current electrolysis(ACE)is an emerging powerful synthetic tool,which principally resembles photoredox catalysis strategies.Its periodically alternating polarity feature allows oxidation and reduction processes to take place on the same electrode surface in a well-controlled manner via the fine-tuning of current frequency along with other reaction parameters.Therefore,many challenging transformations in typical direct electrolysis,including constant current electrolysis or constant potential electrolysis,could be achieved via ACE.The recent advances in the organic synthesis using this emerging technology and its advantages over direct electrolysis are highlighted.

关键词： Electrochemistry Photoredox catalysis Alternating current electrolysis Green chemistry Selectivity

Harpoon-shaped topological photonic crystal for on-chip beam splitter

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Science China(Physics,Mechanics & Astronomy) 2024年

作者： Zhiwei Guan Ruixue Dou Chuangxin Xie Tianyimei Zuo Liyu Huang keyin Wen Chaofeng Wang Huapeng ye Junmin Liu Ze Dong Dianyuan Fan Shuqing Chen Institute of Microscale Optoelectronics Shenzhen University College of Physics and Engineering Technology Minzu Normal University of Xingyi Guangdong Provincial Key Laboratory of Optical Information Materials and Technology and Institute of Electronic Paper Displays South China Academy of Advanced Optoelectronics South China Normal University College of New Materials and New Energies Shenzhen Technology University School of Information and Electronics Beijing Institute of Technology

The advancement of integrated optical communication networks necessitates the deployment of on-chip beam splitters for efficient signal interconnections at network nodes. However, the pursuit of micron-scale beam splitting with large corners and reducing the device footprint to boost connection flexibility often results in phase mismatches. These mismatches, which stem from radiation modes and backward scattering, pose significant obstacles in creating highly integrated and interference-resistant connections. To address this, we introduce a solution based on the topological valley-contrasting state generated by photonic crystals with opposing valley Chern numbers, manifested in a harpoon-shaped structure designed to steer the splitting channels.This approach enables adiabatic mode field evolution over large corners, capitalizing on the robust phase modulation capabilities and topological protection provided by the subwavelength-scale valley-contrasting state. Our demonstration reveals that beam splitters with large corners of 60°, 90°, and 120°exhibit insertion loss fluctuations below 2.7 dB while maintaining a minimal footprint of 8.8μm×8.8μm. As a practical demonstration, these devices facilitate three-channel signal connections, successfully transmitting quadrature phase shift keying signals at 3.66 Tbit/s with bit error rates below the forward error correction threshold, demonstrating performance comparable to that in defects scenarios. By harnessing the unidirectional excitation feature, we anticipate significant enhancements in the capabilities of signal distribution and connection networks through a daisy chain configuration.

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Merging cobalt catalysis and electrochemistry in organic synthesis

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Chinese Chemical Letters 2021年第3期32卷 963-972页

作者： Junsong Zhong Yi Yu Dongliang Zhang keyin ye Key Laboratory of Molecule Synthesis and Function Discovery(Fujian Province University) College of ChemistryFuzhou UniversityFuzhou 350108China

There is an increasing demand of using the low-cost and sustainable cobalt to replace its noble congeners(rhodium and iridium)as reflected by the recent upsurge of cobalt catalysis in the diverse organic transformations.Since all the redox reactivity of cobalt catalysis highly relies on the capability of the interconversion between their oxidation states(most frequently+1,+2 and+3),electrochemistry perfectly meets such a require ment owing to its outstanding perfo rmance in the redox manipulation.In this review,we highlight the recent advances in the merger of cobalt catalysis and electrochemistry in organic synthesis.

关键词： Cobalt Catalysis Electrochemistry Organic synthesis Sustainable chemistry

电化学合成苯并噁噻嗪二氧化物实验的课程思政设计

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大学化学 2024年第2期39卷 61-66页

作者：林彩霞施兆江余意鄢剑锋叶克印袁耀锋福州大学化学学院福州350108

有机电化学合成技术以电子代替传统有机反应的氧化还原剂,具有经济高效、环境友好、可持续发展等特点。通过将电化学合成苯并噁噻嗪二氧化物的科研成果转化为本科生实验,可以让学生建立“绿色化学”的理念,了解有机电化学合成技术对服... 详细信息

有机电化学合成技术以电子代替传统有机反应的氧化还原剂,具有经济高效、环境友好、可持续发展等特点。通过将电化学合成苯并噁噻嗪二氧化物的科研成果转化为本科生实验,可以让学生建立“绿色化学”的理念,了解有机电化学合成技术对服务人类生态文明、国家需求和维护人民生命健康的重要意义,从而提高学生的专业认同感和社会责任感。通过将课程思政渗透到实验教学的全过程,全方位培养学生的科学思维、科学能力和科学素养。

关键词：电化学合成课程思政实验教学

Highly Site-selective Electrooxidation Providing Facile Entries to Functionalized Aromatic Acetals

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Chemical Research in Chinese Universities 2020年第4期36卷 723-724页

作者： WU Jinnan YU Yi ye keyin Key Laboratory of Molecule Synthesis and Function Discovery(Fujian Province University) College of ChemistryFuzhou UniversityFuzhou 350108P.R.China

Given the fact that aldehydes are among the most fundamental and versatile building blocks in organic syn thesis,the development of highly efficient and selective methods for their preparation,especially for those delicatelk functionalized ones remains sigmificant challenging.To address such an issue,Xu and co-workers have recently reported an elegant electrochemical approach realizing the highly regioselective oxidation of functionalized methyl aromatic hydrocarbons towards the desired aromatic acetals without the use of any chemical oxidants or transition metal catalysts These acetals can be then conveniently converted into corresponding structurally diverse aldehydes via hydrolysis.In addition,the synthetic practicability of current method was further highlighted as the key step in the preparation of the antihypertensive drug telmisartan.This work has been published in the Nature Communications and can be reached at https://doi.orp/10.1038/s41467-020-16519-8.

关键词： aldehydes aromatic Highly

以三氯甲基为前体三步法逐级构建全碳取代季碳中心

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有机化学 2022年第10期42卷 3434-3435页

作者：何星磊叶克印福州大学化学学院福州350108

含有全碳取代季碳中心的骨架广泛存在于天然产物和具有重要生理活性的有机小分子之中.化学家们已经成功地开发了多种高效的方法用于直接合成具有单氢和三个不同碳取代的叔碳中心骨架.然而,对于具有四个不同碳取代基的季碳中心的构建,直... 详细信息

含有全碳取代季碳中心的骨架广泛存在于天然产物和具有重要生理活性的有机小分子之中.化学家们已经成功地开发了多种高效的方法用于直接合成具有单氢和三个不同碳取代的叔碳中心骨架.然而,对于具有四个不同碳取代基的季碳中心的构建,直到21世纪才逐渐受到合成化学家的关注.发展更为高效、经济的合成方法来构建全碳取代季碳中心,是有机合成领域需要解决的重大挑战之一.

关键词：全碳三步法有机小分子天然产物有机合成化学家重大挑战 21世纪

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电化学还原烷基卤化物制备烷基硼酸酯

有机化学 2021年第11期41卷 4526-4527页

作者：余意叶克印福州大学化学学院福州350108

有机硼化合物在有机合成、催化、药物发现及材料科学等众多领域中都有着广泛的应用^([1]).特别是近年来,材料化学家们发现有机硼化合物还可以作为共轭材料、共价有机框架和水凝胶的非常理想的组分或者前体^([2]).有机硼酸及其衍生物是... 详细信息

有机硼化合物在有机合成、催化、药物发现及材料科学等众多领域中都有着广泛的应用^([1]).特别是近年来,材料化学家们发现有机硼化合物还可以作为共轭材料、共价有机框架和水凝胶的非常理想的组分或者前体^([2]).有机硼酸及其衍生物是有机硼化合物的重要组成部分,它们被广泛应用于过渡金属催化的交叉偶联反应中.

关键词：有机硼化合物交叉偶联反应电化学还原过渡金属催化有机合成水凝胶硼酸酯材料科学

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全氟立方烷的笼状立体电子效应

大学化学 2023年第11期38卷 126-130页

作者：李懿伦袁耀锋叶克印福州大学化学学院福州350108

立体电子效应是有机化学基础理论的重要组成部分。其中,邻位交叉效应和异头碳效应已经被深入研究并纳入了基础有机化学的教学实践之中。近年来,随着全氟立方烷分子被准确预测和成功合成,一种崭新的笼状电子效应引发了广泛关注。本文简... 详细信息

立体电子效应是有机化学基础理论的重要组成部分。其中,邻位交叉效应和异头碳效应已经被深入研究并纳入了基础有机化学的教学实践之中。近年来,随着全氟立方烷分子被准确预测和成功合成,一种崭新的笼状电子效应引发了广泛关注。本文简要回顾了立体电子效应的发展及其重要应用,着重介绍了全氟立方烷独特的笼状电子效应并对其合成工作进行了深入讨论。结合当前国内外有机化学研究前沿,通过科研反哺教学,有助于化学相关专业学生培养国际化视野、拓宽知识面,并进一步加深对立体电子效应的理解与认识。

关键词：立体电子效应有机合成全氟立方烷

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硫-氟的邻位交叉效应

大学化学 2022年第7期37卷 104-108页

作者：李懿伦余意袁耀锋叶克印福州大学化学学院福州350108

乙烷分子中相邻的两个氢原子被氟取代以后,它的最优构象就从全交叉式转变为邻位交叉,这就是邻位交叉效应影响分子构象最具代表性的一个例子。本文简要回顾了含氟邻位交叉效应的发展历史与重要应用,重点介绍了物理有机科研前沿的硫-氟邻... 详细信息

乙烷分子中相邻的两个氢原子被氟取代以后,它的最优构象就从全交叉式转变为邻位交叉,这就是邻位交叉效应影响分子构象最具代表性的一个例子。本文简要回顾了含氟邻位交叉效应的发展历史与重要应用,重点介绍了物理有机科研前沿的硫-氟邻位交叉效应。结合当前最新的科研成果,验证了通过改变硫原子的电正性可以达到有效调控邻位交叉效应这一重要策略。通过科研反哺教学,有助于进一步加深对硫-氟邻位交叉效应的理解和认识。

关键词：邻位交叉效应立体电子效应构象