24小时热门版块排行榜

返回列表

susanf

金虫 (小有名气)

应助: 4 (幼儿园)
金币: 1545.4
红花: 10
帖子: 151
在线: 27.3小时
虫号: 2487497
注册: 2013-05-29
性别: MM
专业: 胶体与界面化学

[交流] JPCL2017最新贵金属纳米团簇发光性质研究的论文已有8人参与

论文题目：Interfacial Clustering-Triggered Fluorescence–Phosphorescence Dual Solvoluminescence of Metal Nanoclusters
摘要：The fluorescence–phosphorescence dual solvoluminescence (SL) of water-soluble metal nanoclusters (NCs) at room temperature was successfully achieved by a simple solvent-stimulated strategy. The strong interaction between carboxylate ligands and the metal core at the nanoscale interface not only induces rigid conformations of carbonyl groups but also affords a perfect carbonyl cluster that acts as an exact chromophore of metal NCs for aggregation-induced emission (AIE) mechanics. The clustering of carbonyl groups bearing on the polymer backbone chain is promoted by newly discovered n → π* noncovalent interactions. The efficient delocalization of electrons in overlapped C═O double bonds between neighboring carbonyl groups triggered by strong n → π* interactions in the polymer cluster accounts for its unique SL properties, especially the abnormal phosphorescence. This was further confirmed by controlled experiments for the presence of intersystem crossing (ISC) transitions. The results provide novel insights for understanding the complex SL process and open up a new way to study the inherent mechanism of SL by broadening the application of metal NCs.
作者：Taiqun Yang†‡ , Shan Dai‡, Songqiu Yang§, Li Chen†, Pengcheng Liu†, Kailong Dong‡, Jiasheng Zhou‡, Yuting Chen‡, Haifeng Pan‡, Sanjun Zhang*‡∥⊥ , Jinquan Chen‡ , Kun Zhang*†, Peng Wu† , and Jianhua Xu‡∥

J. Phys. Chem. Lett., 2017, 8, pp 3980–3985
有效连接如下：http://pubs.acs.org/doi/10.1021/acs.jpclett.7b01736

华东师范大学化学系张坤课题组联合张三军研究员在JPCL发表了一篇最新贵金属纳米团簇发光的研究快报，从新的的角度提出了簇表面功能聚集诱导发光的增强机制，延续该课题前期的研究成果（J. Am. Chem. Soc., 2014, 136, 1686-1689. ），可以分子水平上实现荧光和磷光的双通道发射的有效调变。是一篇非常不错的论文。

jz-2017-01736s_0004.gif

回复此楼