We provide here, for the first time,
a new interfacial electron-induced
electrochemiluminescence (IEIECL) system, realizing bionic construction
of bioluminescence (BL) by exploiting electrochemiluminescence (ECL)
and ITIES (the interface between two immiscible electrolyte solutions).
Significantly, the superiority of the IEIECL system is embodied with
the solution of the two bottlenecks encountered in the conventional
ECL innovation: that are (a) the applications of hydrophobic luminophores
in more commonly used aqueous solution are inhibited tremendously
due to the poor inherent solubility and the instability of radicals
and (b) the analytes, insoluble in water, are hard to be discovered
in an aqueous system because of too little content. More productive
IEIECL radiation, analogous to BL, originates from the triplet excited
state porphyrin in comparison to the homogeneous ECL. The mechanism
of IEIECL, as well as the interaction mechanism between IEIECL and
charge transfer (comprising electron transfer (ET), ion transfer (IT),
and facilitated ion transfer (FIT)) at the ITIES, are explored in
detail. Finally, we emphasize the actual application potential of
the IEIECL system with the detection of cytochrome <i>c</i> (Cyt <i>c</i>); it is a key biomolecule in the electron
transport chain in the process of biological oxidation and is also
an intermediate species in apoptosis. Potentially, the IEIECL system
permits ones to explore the lifetime and diffusion path of free radicals,
as well as imparting a possibility for the construction of a bionic
sensor
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