Christopher Leslee Denzil Britto, Shanmugam Logapriya, Venkatesan Narmatha, Madheswaran Bharathi, Ravula Venkatesh, Karuppannan Sekar, Kuppannan Shanmuga Bharathi
Department of Chemistry, School of Physical Sciences, Periyar University, Periyar Palkalai Nagar, Salem, Tamil Nadu, 636011, India.
Department of Pharmaceutical Engineering, Vinayaka Mission's Kirupananda Variyar Engineering College, Salem, Tamil Nadu, 636308, India.
Photochem Photobiol Sci. 2025 Apr;24(4):543-554. doi: 10.1007/s43630-025-00704-z. Epub 2025 Apr 1.
This report develops a coumarin-nicotinic hydrazide-based sensor for detection of CN ions. The ligand is prepared by simple method and has been characterized by H NMR, C NMR, FTIR, and mass spectral analyses. The sensing behavior of coumarin-nicotinic hydrazide (CNH) probe was investigated in the presence of different anions using UV-visible and fluorescence methods. The sensor showed a selective naked-eye, colorimetric, and fluorescence detection particularly in the presence of CN ions over the other anions. The sensing involves a ratiometric red shift in absorption and photoluminescence profile in presence of incremental addition of CN ions. This provides a multi-detection point at two different wavelengths. This sensor involves a displacement type approach through a nucleophilic substitution-based chemodosimeter sensor proposed based on H and C NMR along with DO exchange experiment, and mass and photophysical studies. Interestingly, the sensor affords the lowest limit of detection up to 5.97 × 10 M. The practical utility of the sensor is illustrated in molecular logic gate operation and real water analysis.
本报告开发了一种基于香豆素 - 烟酰肼的传感器用于检测氰根离子。该配体通过简单方法制备，并已通过氢核磁共振、碳核磁共振、傅里叶变换红外光谱和质谱分析进行了表征。使用紫外 - 可见光谱和荧光方法研究了香豆素 - 烟酰肼（CNH）探针在不同阴离子存在下的传感行为。该传感器表现出选择性的裸眼比色和荧光检测，特别是在氰根离子存在时相对于其他阴离子。传感过程涉及在逐渐添加氰根离子时吸收和光致发光谱中的比例红移。这在两个不同波长处提供了多检测点。该传感器采用基于亲核取代的化学计量计传感器的置换型方法，该方法基于氢和碳核磁共振以及氘交换实验以及质谱和光物理研究提出。有趣的是，该传感器的最低检测限可达5.97×10⁻⁸ M。该传感器的实际应用在分子逻辑门操作和实际水样分析中得到了说明。
