Two functional tetraphenylethylene derivatives modified by vinylpyridine and vinylnitrobenzene,respectively,were synthesized by Heck coupling reaction.Their optical behaviors were investigated.The results showed they ...Two functional tetraphenylethylene derivatives modified by vinylpyridine and vinylnitrobenzene,respectively,were synthesized by Heck coupling reaction.Their optical behaviors were investigated.The results showed they had AIE activity in solution.The property in solid state displayed that both of them had reversible mechanochromism.Upon grinding,their fluorescence spectra showed around 13–40nm red-shift,and could return to the original state after solvent fuming.We believe that this work will be helpful for the design of stimuli-responsive materials in future.展开更多
Energy transfer and electron transfer are both fundamental mechanisms enabling numerous functional materials and applications.While most materials systems employ either energy transfer or electron transfer,the combine...Energy transfer and electron transfer are both fundamental mechanisms enabling numerous functional materials and applications.While most materials systems employ either energy transfer or electron transfer,the combined effect of energy and electron transfer processes in a single donor/acceptor system remains largely unexplored.Herein,we demonstrated the energy transfer followed by electron transfer(ETET)process in a molecular dyad TPE-NBD.Due to energy transfer,the fluorescence of TPE-NBD was greatly enhanced in non-polar solvents.In contrast,polar solvents activated subsequent electron transfer and markedly quenched the emission of TPE-NBD.Consequently,ETET endows TPE-NBD with significant polarity sensitivities.We expect that employing ETET could generate many functional materials with unprecedented properties,i.e.,for single laser powered multicolor fluorescence imaging and sensing.展开更多
【目的】随着人口老龄化加剧,睡眠障碍已成为威胁老年群体身心健康的重要公共卫生问题。城市绿色空间具有低成本、普惠性特征,可通过自然疗愈作用实现老年人睡眠质量改善。基于跨学科视角,城市绿色空间与老年人睡眠健康的复杂关联机制...【目的】随着人口老龄化加剧,睡眠障碍已成为威胁老年群体身心健康的重要公共卫生问题。城市绿色空间具有低成本、普惠性特征,可通过自然疗愈作用实现老年人睡眠质量改善。基于跨学科视角,城市绿色空间与老年人睡眠健康的复杂关联机制亟须梳理。【方法】以Web of Science和中国知网为基础数据库,将筛选出与老年人睡眠健康相关的452篇学术文献,进行分类归纳,开展学科谱系分析。【结果】老年睡眠障碍受生理-心理特征内在作用机制与环境外源性压力的双重影响,而城市绿色空间通过环境调节、行为促进、社交支持及压力缓解等多维路径,可辅助调节昼夜节律、延长深度睡眠时长并降低睡眠片段化程度。同时,健康效益存在显著个体差异并受传统养生文化的影响。【结论】未来需在深化机制研究的基础上,构建“科学研究—处方制定—设计实施—效果评价”的全流程框架,重点针对不同老年人类群的精准化设计和活动方案,为实现健康老龄化提供创新解决方案。展开更多
肩关节周围炎(Periarthritis of the shoulder,PAS)指肩周软组织病变引起的以肩关节疼痛和活动功能障碍为特征的疾病^([1-2])。据调查,中国中年女性患病率较高^([3-5]),且糖尿病等可显著增加PAS患病率^([6-7])。目前,临床上治疗PAS的方...肩关节周围炎(Periarthritis of the shoulder,PAS)指肩周软组织病变引起的以肩关节疼痛和活动功能障碍为特征的疾病^([1-2])。据调查,中国中年女性患病率较高^([3-5]),且糖尿病等可显著增加PAS患病率^([6-7])。目前,临床上治疗PAS的方法主要包括药物、针灸、推拿、针刀、康复手法、手术等,均可不同程度地改善肩关节疼痛及活动功能障碍,而针刀技术在PAS所致被动运动功能障碍的恢复中具有良好效果。重庆市忠州纯针刀特色技术创新团队通过30余年临床诊疗经验、20余年针刀临床实践积累及多项省部级重点及省部级针刀临床研究等发现,在非臂丛、非静脉麻醉条件下,采用针刀技术治疗本病,可快速解除其被动运动功能障碍,具有独特的优势^([8])。展开更多
基金financially supported by the National Natural Science Foundation of China(Nos.21676113,21402057,21772054)Distinguished Young Scholar of Hubei Province(No.2018CFA079)+5 种基金Youth Chen-Guang Project of Wuhan(No.2016070204010098)the 111 Project(No.B17019)the Ministry-Province Jointly Constructed Base for State Key Lab-Shenzhen Key Laboratory of Chemical Biology(Shenzhen),the State Key Laboratory of Materials-Oriented Chemical Engineering(No.KL17-10)the Open Project Fund of Key Laboratory of Natural Resources of Changbai Mountain&Functional Molecules,Yanbian University,Ministry of Education(No.NRFM201701)the Foundation of Key Laboratory of Synthetic and Biological Colloids,Jiangnan University,Ministry of Education(No.JDSJ2017-07)Self-determined Research Funds of CCNU from the Colleges’Basic Research and Operation of MOE(No.CCNU18TS012)
文摘Two functional tetraphenylethylene derivatives modified by vinylpyridine and vinylnitrobenzene,respectively,were synthesized by Heck coupling reaction.Their optical behaviors were investigated.The results showed they had AIE activity in solution.The property in solid state displayed that both of them had reversible mechanochromism.Upon grinding,their fluorescence spectra showed around 13–40nm red-shift,and could return to the original state after solvent fuming.We believe that this work will be helpful for the design of stimuli-responsive materials in future.
基金supported by Singapore University of Technology and Design(No.T1SRCI17126)A*STAR under its Advanced Manufacturing and Engineering Program(No.A2083c0051)+1 种基金the National Natural Science Foundation of China(Nos.21878286,21908216)Dalian Institute of Chemical Physics(Nos.DMTO201603,TMSR201601)。
文摘Energy transfer and electron transfer are both fundamental mechanisms enabling numerous functional materials and applications.While most materials systems employ either energy transfer or electron transfer,the combined effect of energy and electron transfer processes in a single donor/acceptor system remains largely unexplored.Herein,we demonstrated the energy transfer followed by electron transfer(ETET)process in a molecular dyad TPE-NBD.Due to energy transfer,the fluorescence of TPE-NBD was greatly enhanced in non-polar solvents.In contrast,polar solvents activated subsequent electron transfer and markedly quenched the emission of TPE-NBD.Consequently,ETET endows TPE-NBD with significant polarity sensitivities.We expect that employing ETET could generate many functional materials with unprecedented properties,i.e.,for single laser powered multicolor fluorescence imaging and sensing.
文摘【目的】随着人口老龄化加剧,睡眠障碍已成为威胁老年群体身心健康的重要公共卫生问题。城市绿色空间具有低成本、普惠性特征,可通过自然疗愈作用实现老年人睡眠质量改善。基于跨学科视角,城市绿色空间与老年人睡眠健康的复杂关联机制亟须梳理。【方法】以Web of Science和中国知网为基础数据库,将筛选出与老年人睡眠健康相关的452篇学术文献,进行分类归纳,开展学科谱系分析。【结果】老年睡眠障碍受生理-心理特征内在作用机制与环境外源性压力的双重影响,而城市绿色空间通过环境调节、行为促进、社交支持及压力缓解等多维路径,可辅助调节昼夜节律、延长深度睡眠时长并降低睡眠片段化程度。同时,健康效益存在显著个体差异并受传统养生文化的影响。【结论】未来需在深化机制研究的基础上,构建“科学研究—处方制定—设计实施—效果评价”的全流程框架,重点针对不同老年人类群的精准化设计和活动方案,为实现健康老龄化提供创新解决方案。
文摘肩关节周围炎(Periarthritis of the shoulder,PAS)指肩周软组织病变引起的以肩关节疼痛和活动功能障碍为特征的疾病^([1-2])。据调查,中国中年女性患病率较高^([3-5]),且糖尿病等可显著增加PAS患病率^([6-7])。目前,临床上治疗PAS的方法主要包括药物、针灸、推拿、针刀、康复手法、手术等,均可不同程度地改善肩关节疼痛及活动功能障碍,而针刀技术在PAS所致被动运动功能障碍的恢复中具有良好效果。重庆市忠州纯针刀特色技术创新团队通过30余年临床诊疗经验、20余年针刀临床实践积累及多项省部级重点及省部级针刀临床研究等发现,在非臂丛、非静脉麻醉条件下,采用针刀技术治疗本病,可快速解除其被动运动功能障碍,具有独特的优势^([8])。
