| Title: | Reversible Ultralong Organic Phosphorescence for Visual and Selective Chloroform Detection |
| Author(s): | Wu Q; Ma H; Ling K; Gan N; Cheng Z; Gu L; Cai S; An Z; Shi H; Huang W; |
| Address: | "Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM) , Nanjing Tech University (NanjingTech) , 30 South Puzhu Road , Nanjing 211800 , China. Shaanxi Institute of Flexible Electronics (SIFE) , Northwestern Polytechnical University (NPU) , 127 West Youyi Road , Xi'an 710072 , China" |
| Journal Title: | ACS Appl Mater Interfaces |
| ISSN/ISBN: | 1944-8252 (Electronic) 1944-8244 (Linking) |
| Abstract: | "Volatile organic compounds (VOCs) are widespread in our daily life and greatly harmful to human health, as well as to the environment. To date, it remains a formidable challenge to develop a highly sensitive visual system for selective detection of VOCs. Herein, we report on a metal-free organic molecule of 2,4-di(10 H-phenothiazin-10-yl)-1,3,5-triazine (TDP) with ultralong organic phosphorescence (UOP) feature as a visible chemical probe for chloroform detection. In the pristine solid state, this phosphor shows a green UOP with a lifetime of 56 ms after the removal of excitation light source; however, the UOP greatly diminishes when fumed with chloroform, which is ascribed to the variation in both radiative and nonradiative transitions in crystal with embedded chloroform. Remarkably, TDP materials demonstrate great potential as a visual chemical probe for chloroform, showing high sensitivity, excellent selectivity, and good repeatability. The limitation for chloroform detection is as low as 5 ppm. Combining experimental data and theoretical calculations, it is reasoned that the space confinement via intermolecular interactions between chloroform and TDP molecules play a vital role for high selectivity of chloroform detection. These results pave the way toward expanding the scope of organic luminogens with UOP as well as their applications" |
| Keywords: | H-aggregation chloroform detection crystal engineering organic persistent luminescence ultralong organic phosphorescence volatile organic compounds; |
| Notes: | "PubMed-not-MEDLINEWu, Qi Ma, Huili Ling, Kun Gan, Nan Cheng, Zhichao Gu, Long Cai, Suzhi An, Zhongfu Shi, Huifang Huang, Wei eng 2018/09/12 ACS Appl Mater Interfaces. 2018 Oct 3; 10(39):33730-33736. doi: 10.1021/acsami.8b13713. Epub 2018 Sep 24" |
