报告题目：Novel materials for intensive and long-lasting chemiluminescence and multicolor electrochemiluminescence

报告时间：2019年4月30号上午9点00分

报告地点：新葡的京集团35222vipD912会议室

崔华，中国科学技术大学化学系教授。1990年获中国科技大学理学博士，2000年入选中国科学院“引进海外杰出人才”，2006年获国家自然科学基金委“国家杰出青年基金”，2012年获中国化学会“分析化学基础研究梁树权奖”，2013年获“中国科学院第四届十大杰出妇女”称号，2015年获得中国化学会分析化学专业委员会“中国女分析化学家奖”，2016年担任科技部国家重点研发计划“纳米科技”重点专项项目首席科学家，2018年任国际生物发光与化学发光协会理事。另外，目前还担任《Anal. Bioanal. Chem.》编辑以及《Anal. Chem.》、《ACS sensor》和《分析化学》等杂志编委。近年来，主要从事纳米化学发光及其在生物分析中的应用研究，取得一系列创新性成果。已在Nature Commun.、Anal. Chem.、Chem. Eur. J、Chem. Commun. J. Phys. Chem. B/C、J. Mater. Chem.、Phys. Chem. Chem. Phys.等国际重要化学期刊上发表论文140余篇，获授权中国专利5项、欧洲专利1项、美国专利1项。相关工作受到国际同行的重要关注，受邀在法国、瑞典召开的16th、18^th和20^thInternational Symposium on Bioluminescence & Chemiluminescence和在法国召开的2nd International Meeting on Electrogenerated Chemiluminescence作大会特邀报告。

报告摘要：

For most of chemiluminescence (CL) reactions, light emission are flash. Intensive and long-lasting CL emission is highly desired for cold light sources, sensitive and accurate bioassays and CL imaging, but is still a great challenge.Most electrochemiluminescence (ECL) studies involve single luminophore with a unique emission spectrum, which severely limits its applications. Herein, we report recent progress regarding novel materials for intensive and long-lasting CL and multicolor ECL in our research group. First, a firefly-mimicking intensive and long-lasting CL hydrogel consisting of chitosan, CL reagent N-(4-aminobutyl)-N-ethylisoluminol (ABEI) and catalyst Co²⁺was developed. The light emission was observed by naked eyes in a dark room and lasted for over 150 hours when the hydrogels was mixed with H₂O₂.The intensive and long-lasting CL emission was attributed to the synergistic effect of catalyst Co²⁺, ABEI and the porous network structure of the hydrogels through a slow-diffusion-controlled heterogeneous catalytic reaction.Second, a novel nanoluminophore was synthesized by coating 5,10,15,20-tetrakis(4-carboxyphenyl) -porphyrin (TCPP) and ABEI on the surface of TiO₂nanoparticles, which exhibited unique potential-resolved multi-color ECL emissions using H₂O₂and K₂S₂O₈as coreactants in an aqueous solution. Potential-resolved multicolor ECL from a nanoluminophore was observed for the first time in an aqueous solution. Such new materials areof potential applications in cold light sources, bioassays, biosensors and biological imaging, optoelectronics, light-emitting devices and so on.