Das Dipankar, Alam Rabiul, Ali Mahammad
Department of Chemistry, Jadavpur University, Kolkata 700 032, India.
Vice-Chancellor, Aliah University, IIA/27 New Town, Kolkata 700160, India.
Analyst. 2022 Jan 31;147(3):471-479. doi: 10.1039/d1an01788h.
A new rhodamine 6G-based chemosensor (L3) was synthesized and characterized by H, C, IR and mass spectroscopy studies. It exhibited an excellent selective and sensitive CHEF-based recognition of trivalent metal ions M (M = Fe, Al and Cr) over mono and di-valent and other trivalent metal ions with prominent enhancement in the absorption and fluorescence intensity for Fe (669-fold), Al (653-fold) and Cr (667-fold) upon the addition of 2.6 equivalent of these metal ions in the probe in HO/CHCN (7 : 3, v/v, pH 7.2). The corresponding values were evaluated to be 1.94 × 10 (Fe), 3.15 × 10 (Al) and 2.26 × 10 M (Cr). The quantum yields of L3, [L3-Fe], [L3-Al] and [L3-Cr] complexes in HO/CHCN (7 : 3, v/v, pH 7.2) were found to be 0.0005, 0.335, 0.327 and 0.333, respectively, using rhodamine-6G as the standard. The LODs for Fe, Al and Cr were determined by 3 methods and found to be 2.57, 0.78 and 0.47 μM, respectively. The cyanide ion snatched Fe from the [Fe-L3] complex and quenched its fluorescence its ring-closed spirolactam form. Advanced level molecular logic devices using different inputs (2 and 4 input) and a memory device were constructed.
合成了一种基于罗丹明6G的新型化学传感器（L3），并通过氢、碳、红外光谱和质谱研究对其进行了表征。它对三价金属离子M（M = Fe、Al和Cr）表现出优异的基于化学增强荧光法（CHEF）的选择性和灵敏识别，相对于单价和二价以及其他三价金属离子，在HO/CHCN（7 : 3，v/v，pH 7.2）的探针中加入2.6当量的这些金属离子后，对Fe（669倍）、Al（653倍）和Cr（667倍）的吸收和荧光强度有显著增强。相应的 值经评估分别为1.94 × 10 （Fe）、3.15 × 10 （Al）和2.26 × 10 M（Cr）。以罗丹明-6G为标准，发现在HO/CHCN（7 : 3，v/v，pH 7.2）中L3、[L3-Fe]、[L3-Al]和[L3-Cr]配合物的量子产率分别为0.0005、0.335、0.327和0.333。通过3种方法测定了Fe、Al和Cr的检测限，分别为2.57、0.78和0.4 μM。氰离子从[Fe-L3]配合物中夺取Fe并淬灭其荧光，使其呈闭环螺内酰胺形式。构建了使用不同输入（2输入和4输入）的高级分子逻辑器件和一个存储器件。 （注：原文中部分 值未给出具体数字，翻译时保留原文格式）
