Xu Lingfeng, Huang Yanrong, Peng Hui, Xu Wenyan, Yi Xiuguang, He Genhe
Key Laboratory of Biodiversity and Ecological Engineering of Jiangxi Province, Jinggangshan University, Ji'an 343009, Jiangxi, China.
State Key Laboratory of Luminescent Materials & Devices, College of Materials Science & Engineering, South China University of Technology, Guangzhou 510640, China.
ACS Omega. 2023 Apr 3;8(14):13213-13221. doi: 10.1021/acsomega.3c00488. eCollection 2023 Apr 11.
Liquid safety is considered a serious public health problem; a convenient and effective viscosity determination method has been regarded as one of the powerful means to detect liquid safety. Herein, one kind of triphenylamine-modified cinnamaldehyde-based fluorescent sensor (3-(4'-(diphenylamino)-[1,1'-biphenyl]-4-yl)acrylaldehyde (DPABA)) has been developed for sensing viscosity fluctuations in a liquid system, where a cinnamaldehyde derivative was extracted from one kind of natural plant cinnamon and acted as an acceptor, which has been combined with a triphenylamine derivate via the Suzuki coupling reaction within one facile step. Twisted intramolecular charge transfer (TICT) was observed, and the rotation could be restricted in the high-viscosity microenvironment; thus, the fluorescent signal was released at 548 nm. Featured with a larger Stokes shift (223.8 nm in water, 145.0 nm in glycerol), high adaptability, sensitivity, selectivity, and good photostability, the capability of high signal-to-noise ratio sensing was achieved. Importantly, this sensor DPABA has achieved noninvasively identifying thickening efficiency investigation, and viscosity fluctuations during the liquid deterioration program have been screened as well. We believed that this unique strategy can accelerate intelligent molecular platforms toward liquid quality and safety inspection.
液体安全被视为一个严重的公共卫生问题；一种方便有效的粘度测定方法被认为是检测液体安全的有力手段之一。在此，开发了一种基于三苯胺修饰肉桂醛的荧光传感器（3-(4'-(二苯胺基)-[1,1'-联苯]-4-基)丙烯醛(DPABA)），用于检测液体系统中的粘度波动，其中肉桂醛衍生物从一种天然植物肉桂中提取并作为受体，通过一步简便的铃木偶联反应与三苯胺衍生物结合。观察到扭曲的分子内电荷转移(TICT)，并且在高粘度微环境中旋转可能受到限制；因此，荧光信号在548nm处释放。该传感器具有较大的斯托克斯位移（在水中为223.8nm，在甘油中为145.0nm）、高适应性、灵敏度、选择性和良好的光稳定性，实现了高信噪比传感能力。重要的是，该传感器DPABA实现了非侵入性识别增稠效率研究，并且还筛选了液体变质过程中的粘度波动。我们相信，这种独特的策略可以加速智能分子平台用于液体质量和安全检测。
