Fluorescence Quenching of 2-Amino-9-Hydroxy Fluorene by Chloromethanes |
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| Authors: | R Munavar Sulthana |
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| Institution: | Department of Chemistry , St. Joseph's College of Arts and Science , Cuddalore, Tamilnadu, India |
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| Abstract: | Fluorescence quenching of 2-amino-9-hydroxyfluorene by CCl4, CHCl3, and CH2Cl2 was investigated in solvents of different polarity. The results reveal that the mechanism of quenching is purely dynamic (complex formed in excited state). The bimolecular quenching-rate constants (kq) correlate well with electron affinity of the quenchers. They are also dependent on the polarity of the solvents, confirming the formation of charge-transfer nonemissive exciplex. |
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| Keywords: | 2-amino-9-hydroxyfluorene chloromethanes dynamic quenching fluorescence quenching nonemissive charge-transfer exciplex |
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