Electron donor–acceptor complexes between naphthylamines and methyl viologen in aqueous sodium dodecyl sulphate solution

Abstract

The electron donor–acceptor (EDA) interaction between methyl viologen (MV2+) and 1-naphthylamine (1NA), 2-naphthylamine (2NA), and N,N-dimethyl-1-naphthylamine (DMA) was studied in water and in aqueous sodium dodecyl sulphate (SDS). The experimental values of the association constants in water were 8.9, 9.8, and 2.8 M−1 for 1NA, 2NA, and DMA, respectively. In the presence of SDS the observed values were very much higher and strongly dependent upon the detergent concentration. The enhancement in the interaction is due to an increase in the local concentration of the partners in the micellar pseudophase. MV2+ itself was shown to strongly interact with the micelles. A new absorption is present at the red tail of the spectrum of MV2+ in the presence of SDS micelles. An association constant of 1700 M−1 was obtained from this absorption.

Synergistic Enhancement of Electron-Accepting and -Donating Ability of Nonconjugated Polymer Nanodot in Micellar Environment

“…Notably, simple mixing of DMA with MV 2+ also results in similar brown color complex with an absorption band centered at 480 nm (Figure S5 of the SI). Similar results have been observed earlier for various amine-containing molecules and MV 2+ pair due to the formation of weak donor–acceptor ground state complex formation. , Addition of MV 2+ first followed by the addition of DMA results in similar kinds of PL quenching of PND (Figure S6 of the SI). Here it is important to note that the PL peak position of PND remains unchanged upon addition of DMA and MV 2+ , indicating the absence of any specific association of PND with DMA and MV 2+ .…”

The photochemistry of electron donor–acceptor (EDA) complexes in micellar solutions. I. The stilbene–methylviologen system

“…During photolysis, the ampoules were open to the atmosphere. observed in micelle-catalyzed bimolecular reactions (19) and it has also been observed in the system naphthylamines-MV2 pseudophase could affect the equilibrium, thus changing the in SDS (20).…”

“…The results can be analyzed by Under our experimental conditions, the fraction of MV+' means of the following equations: bound to micelles is nearly unit (20), as is the case for stilbenes 2 ' [Dl,, a straight line is obtained (Fig. 2) and Kc, can be calculated from the slope.…”

Ink-jet Printing for the Fabrication of a Flexible Electrochromic Device Based on the Water-Soluble Viologen-Functionalized Dendrimer

“…Type III viologen materials are solid in all redox states during usage. Researchers have developed various viologen-functionalized materials [5][6][7] such as viologen-modified nano-crystals [8][9][10][11][12], viologen nano-composite [13], polymers containing viologen [14,15], dialkyl and diaryl viologens [3,12,[16][17][18][19][20][21][22][23][24], viologen-functionalized hyper-branched and viologen-functionalized dendrimer [16,[25][26][27][28], which have different solubility and EC device efficiency.…”