共晶提升纯有机材料室温磷光余辉性能  

Cocrystallization Boosted Performance of Room Temperature Phosphorescence Afterglows from Pure Organics

作　　者：崔怡静 朱天文 张强 袁望章[1,2] Cui Yijing;Zhu Tianwen;Zhang Qiang;Yuan Wang Zhang(Shanghai Engineering Research Center for Electrochemical Energy Devices,Shanghai Key Laboratory of Electrical Insulation and Thermal Aging,Frontiers Science Center for Transformative Molecules,School of Chemistry and Chemical Engineering,Shanghai Jiao Tong University,Shanghai 200240;Key Laboratory of Green and High-End Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining 810008)

机构地区：[1]上海交通大学化学化工学院变革性分子前沿科学中心、上海市电气绝缘与热老化重点实验室、上海电化学能源器件工程技术研究中心,上海200240 [2]中国科学院青海盐湖研究所盐湖资源绿色高值利用重点实验室,西宁810008

出　　处：《有机化学》2024年第8期2588-2594,共7页Chinese Journal of Organic Chemistry

基　　金：国家自然科学基金(Nos.52073172,U22A20250)资助项目。

摘　　要：纯有机超长寿命室温磷光(p-RTP)材料因其独特的光物理性质,低成本,结构可设计性及其在生物影像、疾病诊疗、传感与防伪加密等领域的应用前景引起了广泛关注.然而,要实现兼具高效且颜色可调的p-RTP余辉发射,仍颇具挑战.受簇聚诱导发光(CTE)机理启发,选用三聚氰胺(MA)和环酰脲化合物海因(HA)及二氢尿嘧啶(DHU)作为电子给体和受体,采用共晶策略制备了1∶1计量组成的共晶.较MA、HA及DHU单组分晶体而言,共晶展现出更好的p-RTP颜色可调性及更长寿命,这是共晶中广泛存在C=O、孤对电子、多重氢键、适当电荷转移及多重簇发光中心等协同作用的结果,并进一步展示了这些共晶材料在高端防伪保密领域的应用.Pure organic materials with persistent room-temperature phosphorescent(p-RTP)have attracted extensive attention due to their unique photophysical properties,low cost,design flexibility,and promising applications in such areas as biomedical imaging,disease diagnosis and treatment,sensing,and anti-counterfeiting encryption.Achieving efficient,long-lived,and tunable p-RTP afterglows,however,remains a significant challenge.Herein,inspired by the clusteringtriggered emission(CTE)mechanism,utilizing the cocrystallization strategy,cocrystals with stoichiometric ratio of 1∶1 were prepared by employing melamine(MA)and cyclic acylureas of hydantoin(HA)and dihydrouracil(DHU)as electron donor and acceptors,respectively.Compared to the single-component crystals of MA,HA,and DHU,the cocrystals exhibited better color-tunability and longer lifetimes for p-RTP emissions,which are attributable to the synergistic effects of the widespread presence of C=O groups,lone pair electrons,multiple hydrogen bonds,appropriate charge transfer,and multiple emissive clusters.Furthermore,advanced anti-counterfeiting and encryption applications of these cocrystalss were demonstrated.

关 键 词：超长寿命室温磷光 余辉 共晶 簇聚诱导发光 

分 类 号：TB34[一般工业技术—材料科学与工程]