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Updated: Feb 22, 2026

Fabrication of White Light-emitting Electrochemical Cells with Stable Emission from Exciplexes
Published on: November 15, 2016
A new pH sensitive fluorescent and white light emissive material through controlled intermolecular charge transfer
Y I Park1, O Postupna2, A Zhugayevych2
1Physical Chemistry and Applied Spectroscopy (C-PCS) , Chemistry Division , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , USA .
Abstract:
A new, pH dependent and water-soluble, conjugated oligomer (amino, trimethylammonium oligophenylene vinylene, ATAOPV) was synthesized with a quaternary ammonium salt and an aromatic amine at the two ends of a π-conjugated oligomer, thus creating a strong dipole across the molecule. A unique white light LED is successfully fabricated from a stimuli responsive organic molecule whose emission properties are dominated by the pH value of the solution through controlled intermolecular charge transfer.
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