Patra Ashoke Kumar, Halder Dibakar, Roy Anik, Maity Suvendu, Baildya Nabajyoti, Pramanik Goutam, Saha Indrajit
Department of Chemistry, Ramakrishna Mission Residential College, Narendrapur, Kolkata, 700103, India.
Department of Chemistry, Milki High School, Milki, Malda, 732209, India.
J Fluoresc. 2024 Mar;34(2):879-884. doi: 10.1007/s10895-023-03329-6. Epub 2023 Jul 5.
A new carbazole-coupled tetrakis-(1 H-pyrrole-2-carbaldehyde) anion receptor 1 has been designed and synthesized. Anion binding studies in organic media using fluorescence and UV-vis spectroscopy revealed that receptor 1 is capable of sensing HPO with high selectivity. Addition of HPO to THF solution of 1 resulted in the emergence of a new broad band at longer wavelength along with quenching of the original emission band forming a ratiometric response. Based on dynamic light scattering (DLS) experiment and fluorescence lifetime measurement, we propose that the emergence of new emission band in the presence of HPO ion is due to the aggregation-induced excimer formation.
一种新型咔唑偶联的四（1H-吡咯-2-甲醛）阴离子受体1已被设计并合成。在有机介质中使用荧光和紫外可见光谱进行的阴离子结合研究表明，受体1能够高选择性地识别HPO。向1的四氢呋喃溶液中加入HPO，导致在更长波长处出现一个新的宽带，同时原始发射带猝灭，形成比率响应。基于动态光散射（DLS）实验和荧光寿命测量，我们提出在HPO离子存在下新发射带的出现是由于聚集诱导的准分子形成。
