Chemically controlled amplified ratiometric fluorescence in surface-immobilized end-capped oligo(p-phenylene ethynylene)s

Journal of the American Chemical Society
Jiba Raj AcharyaEvgueni E Nesterov

Abstract

Efficient photoexcitation energy transfer in extended pi-electron conjugated molecules is a key factor in applications of such systems as a gain media in signal-amplifying fluorescent chemodetectors. Here we report an unprecedented ratiometric fluorescence amplification phenomenon in the surface-immobilized monolayers of oligo(p-phenylene ethynylene)s end-capped with a lower energy gap receptor group. The process of covalent immobilization on the surface results in monolayer films with improved molecular organization, which display highly efficient excitation energy transfer to the lower energy receptor groups. Chemical transformation of a subtle fraction of the receptor groups on the surface leads to a very significant fluorescent ratiometric response. While fundamental understanding of this unusual "turn-on" amplification phenomenon requires further studies, it can be used to develop thin-film ratiometric fluorescent chemosensors with improved optical gain.

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Citations

Apr 2, 2010·Journal of Fluorescence·Alexander P Demchenko
Jul 14, 2010·Beilstein Journal of Organic Chemistry·Dhananjaya SahooAdelheid Godt
Sep 30, 2010·Chemical Society Reviews·Liping Ding, Yu Fang
Jul 16, 2010·Angewandte Chemie·M Deniz YilmazJurriaan Huskens
Jul 4, 2013·Chemical Communications : Chem Comm·Brian G ImsickEvgueni E Nesterov
Nov 20, 2016·Chemistry : a European Journal·Giuseppe Trusso SfrazzettoAntonino Gulino
Apr 2, 2010·ACS Applied Materials & Interfaces·Tarkeshwar GuptaMilko E van der Boom
Jan 20, 2011·The Journal of Organic Chemistry·Thomas BuraRaymond Ziessel
Jul 16, 2011·The Journal of Physical Chemistry. a·Hidenori Nakayama, Shunsaku Kimura

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