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Photoinduced dissociative electron transfer (DET) interactions in methoxycalixarene–chloroalkane systems |
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| Authors: | J Mohanty H Pal S K Nayak S Chattopadhyay A V Sapre |
| Affiliation: | a Radiation Chemistry and Chemical Dynamics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India b Bio-Organic Division, Bhabha Atomic Research Centre, Mumbai 400 085, India |
| Abstract: | Fluorescence quenching of methoxycalixarenes (MOCX) by chloroalkanes (CA) has been investigated in acetonitrile solutions. Observed quenching is attributed to photoinduced dissociative electron transfer (DET) interaction, which is supported by the characterization of the Cl? ions and by the radical scavenging experiments. Comparing the Cl? yields with different DET systems, it is inferred that both concerted and stepwise DET mechanisms operate simultaneously in MOCX–CA systems. A correlation of the quenching constants with the free-energy changes following a suitable DET theory supports the above inference. |
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