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Optically actuating ultra-stable radicals in a large π-conjugated ligand constructed photochromic complex

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Science China Chemistry 2021年第3期64卷 432-438页

作者： ji-xiang hu Xiao-Fan jiang Yu-Juan Ma Xue-Ru Liu Bang-Di Ge A-Ni Wang Qi Wei Guo-Ming Wang College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071China Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education College of Chemistry and Materials ScienceNorthwest UniversityXi'an 710069China

Producing ultra-stabilized radicals via light irradiation has raised considerable concern but remains a tremendous challenge in functional materials. Herein, optically actuating ultra-stable radicals are discovered in a sterically encumbered and large π-conjugated tri(4-pyridyl)-1,3,5-triazine(TPT) ligands constructed photochromic compound Cu_(3)(H-HEDP)_(2)TPT_(2)·2H_(2)O(QDU-12;HEDP=hydroxyethylidene diphosphonate). The photogeneration of TPT· radicals is the photoactive behavior of electron transfer from HEDP motifs to TPT units. The ultra-long-lived radicals are contributed from strong interchain π-π interactions between the large π-conjugated TPT components, with the radical lifetime maintained for about 18 months under ambient conditions. Moreover, the antiferromagnetic couplings between TPT· radicals and Cu^(2+)ions plummeted the demagnetization to 35% of its original state after light irradiation, showing the largest room temperature photodemagnetization in the current radicalbased photochromic materials.

关键词： electron transfer gigantic photodemagnetization π-conjugated ligands photochromic ultra-stable radicals

Ligand Modified and Light Switched On/Off Single-Chain Magnets of {Fe_(2)Co} Coordination Polymers via Metal-to-Metal Charge Transfer

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CCS Chemistry 2023年第4期5卷 865-875页

作者： ji-xiang hu Hai-Lang Zhu Yin-Shan Meng jiandong Pang Na Li Tao Liu Xian-He Bu School of Materials Science and Engineering Nankai UniversityTianjin 300350 College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071 State Key Laboratory of Fine Chemicals Dalian University of TechnologyDalian 116024

It is still a formidable challenge to simultaneously switch single-chain magnet(SCM)behavior via ligand modification and light irradiation in the field of molecular ***,we present a ligandbridged layer{[pzTpFe(CN)3]4Co2(Bib)4}·3H2O(1;pzTp,tetra-kis(1-pyrazolyl)borate;Bib,1,4-bis-(1Himidazol-1-yl)benzene)and a well-isolated double chain{[pzTpFe(CN)3]2Co(Bpi)2}·CH3CN·4H2O(2;Bpi,1-Biphenyl-4-yl-1H-imidazole)that display reversible metal-to-metal charge transfer(MMCT)between FeIII LS(μ-CN)CoII HS(μ-NC)FeIII LS(LS,low spin;HS,high spin)and FeIII LS(μ-CN)CoIII LS(μ-NC)FeII LS linkages under alternating irradiation with 808 and 532 nm *** bidirectional light irradiations induces significant changes in anisotropy and intrachain magnetic interactions,resulting in the on/off switching of SCM behavior with observable hysteresis loops by 808 and 532 nm light irradiations for both *** of the ligand modification,the SCM property of 2 with the monodentate ligand is greatly improved with a correlation length increased to 83,which is the largest correlation length among all reported light actuated ***,the influence of ligand modification on their thermally induced MMCT is also *** study provides a rational approach for the swift and reversible control of SCM behavior via ligand modified and light induced MMCT,which is crucial to the future technological demand for high-density data storage and processing.

关键词： bidirectional light switching correlation length ligand modification metal-to-metal charge transfer single-chain magnets

Manipulation of successive crystalline transformations to control electron transfer and switchable functions

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National Science Review 2018年第4期5卷 507-515页

作者： Cheng-Qi jiao Wen-jing jiang Yin-Shan Meng Wen Wen Liang Zhao Jun-Li Wang ji-xiang hu Gagik G.Gurzadyan Chun-Ying Duan Tao Liu State Key Laboratory of Fine Chemicals Dalian University of Technology Institute of Artificial Photosynthesis State Key Laboratory of Fine Chemicals Dalian University of Technology

Electron transfer in solid is crucial to switchable magnetic,electrical,optical and mechanical ***,it is a formidable challenge to control electron-transfer behaviors via manipulation of crystalline phases,especially through dynamic crystalline ***,three crystalline phases of an{Fe2Co2}compound were obtained via enhancement of intermolecularπ···πinteractions inducingsuccessive single-crystal-to-single-crystal transformations,from solvated 1·2CH3OH·4H2O,to desolvated1 and its polymorph 1a accompanying electron transfer.1·2CH3OH·4H2O showed thermally inducedreversible intermetallic electron transfer in mother *** electron-transfer behavior was observed in 1.1a showed reversible intermetallic electron transfer upon thermal treatment or alternative irradiation with808-and 532-nm lasers at cryogenic *** electron-transfer behaviors significantly change the magnetic and optical properties,providing a strategy to realize different electron-transfer behaviors andswitchable functions viaπ···πinteractions manipulated dynamic crystalline transformation.

关键词： electron-transfer dynamic structural transformation successive crystalline transformations reversible polymorphs

Electron transfer photochromism of Ln-based(Ln=Dy,Tb)coordinated behavior

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Science China Materials 2022年第3期65卷 788-794页

作者： Qian Zhang Song-De Han Qi Li ji-xiang hu Guo-Ming Wang College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071China

Switching on/off single-molecule magnets(SMMs)at room temperature is still a challenge in moleculebased ***,two photochromic Ln-based(Ln=Dy,Tb)phosphonate coordinated polymers were synthesized with regulable SMM *** reversible room-temperature photo-coloration was an electron transfer process with a generation of relatively stable radicals,characterized by structural analyses,ultraviolet-visible,luminescence and electron spin resonance spectra and magnetic ***,owing to the antiferromagnetic coupling interactions between Ln^(3+) ions and photogenerated radicals,the room-temperature light irradiation surprisingly switched off the SMM behavior,showing the first example of radicalquenched SMMs in the molecule-based ***,the silient SMM behavior could be recovered after eliminating photogenerated radicals via heat treatment,showing a reversible off/on switch of SMMs via light and *** work constructs a system for switching off/on SMMs through electron transfer photochromism,providing a visual operation way via naked-eye-detectable coloration for the switchable SMMs.

关键词： electron transfer photochromism photogenerated radicals single-molecule magnets switch off

Repetitive transcranial magnetic stimulation in Alzheimer’s disease:effects on neural and synaptic rehabilitation

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Neural Regeneration Research 2025年第2期20卷 326-342页

作者： Yi ji Chaoyi Yang Xuerui Pang Yibing Yan Yue Wu Zhi Geng Wenjie hu Panpan hu Xingqi Wu Kai Wang Department of Neurology The First Affiliated Hospital of Anhui Medical UniversityHefeiAnhui ProvinceChina Anhui Province Key Laboratory of Cognition and Neuropsychiatric Disorders HefeiAnhui ProvinceChina Collaborative Innovation Center of Neuropsychiatric Disorders and Mental Health HefeiAnhui ProvinceChina Institute of Artificial Intelligence Hefei Comprehensive National Science CenterHefeiAnhui ProvinceChina Department of Psychology and Sleep Medicine The Second Affiliated Hospital of Anhui Medical UniversityHefeiAnhui ProvinceChina

Alzheimer’s disease is a neurodegenerative disease resulting from deficits in synaptic transmission and *** Alzheimer’s disease brain tends to be hyperexcitable and hypersynchronized,thereby causing neurodegeneration and ultimately disrupting the operational abilities in daily life,leaving patients *** transcranial magnetic stimulation is a cost-effective,neuro-modulatory technique used for multiple neurological *** the past two decades,it has been widely used to predict cognitive decline;identify pathophysiological markers;promote neuroplasticity;and assess brain excitability,plasticity,and *** has also been applied to patients with dementia,because it can yield facilitatory effects on cognition and promote brain recovery after a neurological ***,its therapeutic effectiveness at the molecular and synaptic levels has not been elucidated because of a limited number of *** study aimed to characterize the neurobiological changes following repetitive transcranial magnetic stimulation treatment,evaluate its effects on synaptic plasticity,and identify the associated *** review essentially focuses on changes in the pathology,amyloidogenesis,and clearance pathways,given that amyloid deposition is a major hypothesis in the pathogenesis of Alzheimer’s *** mechanisms associated with repetitive transcranial magnetic stimulation procedures and different pathways mediating gene transcription,which are closely related to the neural regeneration process,are also ***,we discuss the outcomes of animal studies in which neuroplasticity is modulated and assessed at the structural and functional levels by using repetitive transcranial magnetic stimulation,with the aim to highlight future directions for better clinical translations.

关键词： Alzheimer’s disease amyloid deposition apoptotic mechanisms biomarker neural regeneration neurodegeneration repetitive transcranial magnetic stimulation synaptic plasticity

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浅析警卫观察

武警学院学报 2005年第2期21卷 32-34页

作者：吉相虎武警学院警卫系，河北廊坊065000

观察是人的心理素质之一,它是我们分析问题和解决问题的第一道工序.对于警卫观察来说,它不同于一般的科学实验观察,需要百分之百的准确,不允许出现丝毫差错.在警卫人员素质评价中,警卫观察占据着重要地位.

关键词：警卫人员观察方法

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公安警卫部队科技强警的实践与思考

西安文理学院学报（社会科学版） 2009年第2期12卷 120-121页

作者：吉相虎中国人民武装警察部队学院警卫系河北廊坊065000

新时期公安警卫部队科技强警思想,是在新的历史条件下对毛泽东军事思想、邓小平等党和国家领导人科技强军思想的继承与发展,是公安机关科学分析时代发展特征和现代公安工作特点作出的科学结论,公安警卫部队以应提升警卫技术装备的科技... 详细信息

新时期公安警卫部队科技强警思想,是在新的历史条件下对毛泽东军事思想、邓小平等党和国家领导人科技强军思想的继承与发展,是公安机关科学分析时代发展特征和现代公安工作特点作出的科学结论,公安警卫部队以应提升警卫技术装备的科技含量为重点,积极改善公安警卫部队现有编制体制,全面推进公安警卫部队工作的现代化建设。

关键词：军事思想科技强警警卫部队

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地理信息系统在警卫工作中的应用

武警学院学报 2006年第3期22卷 29-31页

作者：吉相虎武警学院警卫系河北廊坊 065000

公安警卫部门肩负着保卫党和国家领导人及来访重要外宾安全的特殊使命.当前,随着我国改革开放的深入、经济建设的飞速发展和国际地位的日益提高,大中城市警卫工作任务日趋加重,在对警卫人员个人综合素质提出新要求的同时,对警卫人员驾... 详细信息

公安警卫部门肩负着保卫党和国家领导人及来访重要外宾安全的特殊使命.当前,随着我国改革开放的深入、经济建设的飞速发展和国际地位的日益提高,大中城市警卫工作任务日趋加重,在对警卫人员个人综合素质提出新要求的同时,对警卫人员驾驭警卫信息的能力提出了严峻挑战.GIS地理信息系统是一种能实施地理数据采集、存储和显示的信息数据库管理工具.地理信息系统在警卫工作中应用的特点、系统数据模型及功能.

关键词： GIS 警卫信息管理应用

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公安警卫部队青年警官心理压力的社会学分析

武警学院学报 2010年第5期26卷 26-28页

作者：吉相虎武警学院警卫系河北廊坊065000

由于职业性质的特殊性，公安警卫部队青年警官在工作中都承受着一定的心理压力。过度的心理压力不仅影响青年警官个人身心健康，同时也直接影响公安警卫部队的各项建设及警卫任务的圆满完成。分析公安警卫部队青年警官承受的心理压力，... 详细信息

由于职业性质的特殊性，公安警卫部队青年警官在工作中都承受着一定的心理压力。过度的心理压力不仅影响青年警官个人身心健康，同时也直接影响公安警卫部队的各项建设及警卫任务的圆满完成。分析公安警卫部队青年警官承受的心理压力，研究缓解其压力的途径与对策，对发挥公安警卫部队青年警官工作积极性与创造性，提高部队战斗力具有重要的现实意义。

关键词：警卫部队青年警官心理压力社会学