Modulation of the Excited-State Proton Transfer Rate of d-luciferin in Mixed Reverse Micellar Systems | Zendy

Arindam Das | Zendy; Sk Imadul Islam | Zendy; Dipak K. Das | Zendy; Rajib Kumar Mitra | Zendy

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Modulation of the Excited-State Proton Transfer Rate of d-luciferin in Mixed Reverse Micellar Systems

Author(s) -

Arindam Das,

Sk Imadul Islam,

Dipak K. Das,

Rajib Kumar Mitra

Publication year - 2018

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.8b00800

Subject(s) - chemistry , cyclohexane , cationic polymerization , dynamic light scattering , excited state , proton , fourier transform infrared spectroscopy , photochemistry , analytical chemistry (journal) , chromatography , chemical engineering , organic chemistry , nanoparticle , physics , quantum mechanics , nuclear physics , engineering

The excited-state proton transfer (ESPT) rate of photo-acids in a confined medium depends on several physical parameters of the immediate environment. We introduce a new parameter in the form of charge type at the interface of reverse micellar (RM) systems to modulate the ESPT rate. We investigate the ESPT reaction of d-luciferin in mixed RM systems composed of nonionic polyoxyethylene(5)nonylphenylether (Igepal CO-520) with cationic didodecyldimethylammonium bromide (DDAB) and anionic sodium bis(2-ethylhexyl)sulfosuccinate (AOT) in cyclohexane (Cy) at different mole fractions of Ig ( X Ig ) and fixed hydration. ESPT is feeble in AOT RM, whereas it is favorable in the other two RMs. Addition of Ig is observed to facilitate ESPT in AOT RM linearly, whereas in DDAB, it shows a synergistic effect. The various physical parameters of water in the mixed RM water pool have been investigated using dynamic light scattering, Fourier transform infrared, and time-resolved fluorescence spectroscopy measurements to underline the ESPT mechanism in these mixed RMs.

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