Department of Chemistry, Dr Bhupendranath Dutta Smriti Mahavidyalaya, Hatgobindapur, Burdwan, 713407, India.
Luminescence. 2011 Nov-Dec;26(6):747-53. doi: 10.1002/bio.1308. Epub 2011 May 24.
The cavity in a porphyrin can accommodate metal ions through electron donor-acceptor (EDA) interaction in acetonitrile media without any specially designed fabrication with the porphyrin subunit. Alkali metal ion forms a complex with meso-tetraphenylporphyrin (TP) in 2:1 stoichiometry, while the bivalent Mg(2+) ion follows a 1:1 stoichiometry. A fluorescence interaction study indicated that TP can behave like a chemosensor for these ions present in the blood electrolytes. Specifically, for the alkali metal ions intensity-based sensing was observed, due to inhibition of photoinduced electron transfer (PET), entailing enhancement of fluorescence intensity, and for the alkaline-earth Mg(2+) a mixed quenching was observed. Na(+) and K(+) ions can be differentiated depending upon the extent of fluorescence enhancement.
卟啉的空腔可以在乙腈介质中通过电子供体-受体（EDA）相互作用容纳金属离子，而无需对卟啉亚基进行任何特别设计的制造。碱金属离子与间四苯基卟啉（TP）以 2:1 的化学计量比形成配合物，而二价 Mg(2+) 离子遵循 1:1 的化学计量比。荧光相互作用研究表明，TP 可以像化学传感器一样检测血液电解质中的这些离子。具体而言，对于碱金属离子，由于光诱导电子转移（PET）的抑制，观察到基于强度的传感，从而导致荧光强度增强，而对于碱性土 Mg(2+)，则观察到混合猝灭。可以根据荧光增强的程度来区分 Na(+) 和 K(+) 离子。
