Figures (11)  Tables (2)

    • Figure 1. 

      Stoichiometry of the reaction between L-Leucine and DPC in basic medium.

    • Figure 2. 

      FTIR spectrum of the ultimate product (3-methylbutanoic acid).

    • Figure 3. 

      The correlation between [L-leucine] and kobs at [DPC] = 1.75 × 10−5 M, [OH−] = 0.02 M, [Ru3+] = 2.5 × 10−6, I = 0.1 M (KNO3), Temp = 298 K, [IO4−] = 5.5 × 10−4 M, [CPC] = 6.0 × 10−3 M.

    • Figure 4. 

      The correlation between [OH−] and kobs at [DPC] = 1.75 × 10−5 M, [L-leucine] = 2.75 × 10−4 M, [Ru3+] = 2.5 × 10−6, I = 0.1 M (KNO3), Temp = 298 K, [IO4−] = 5.5 × 10−4 M, [CPC] = 6.0 × 10−3 M.

    • Figure 5. 

      The correlation between [IO4−] and kobs at [DPC] = 1.75 × 10−5 M, [L-leucine] = 2.75 × 10−4 M, [OH−] = 0.02 M, [Ru3+] = 2.5 × 10−6, I = 0.1 M (KNO3), Temp = 298 K, [CPC] = 6.0 × 10−3 M.

    • Figure 6. 

      The correlation between [Ru(III)] and kobs at [DPC] = 1.75 × 10−5 M, [L-leucine] = 2.75 × 10−4 M, [OH−] = 0.02 M, I = 0.1 M (KNO3), Temp = 298 K, [IO4−] = 5.5 × 10−4 M, [CPC] = 6.0 × 10−3 M.

    • Figure 7. 

      The correlation between temperature and kobs at [DPC] = 1.75 × 10−5 M, [L-leucine] = 2.75 × 10−4 M, [OH−] = 0.02 M, [Ru3+] = 2.5 × 10−6, I = 0.1 M (KNO3), [IO4−] = 5.5 × 10−4 M, [CPC] = 6.0 × 10−3 M.

    • Figure 8. 

      The correlation between [CPC] and kobs at [DPC] = 1.75 × 10−5 M, [L-leucine] = 2.75 × 10−4 M, [OH−] = 0.02 M, [Ru3+] = 2.5 × 10−6, I = 0.1 M (KNO3), Temp = 298 K, [IO4−] = 5.5 × 10−4 M.

    • Figure 9. 

      Mechanism of Ru(III) facilitated oxidation of L-leucine by DPC.

    • Figure 10. 

      Conceptual illustration of Ru(III) mediated L-leucine Oxidation by DPC in CPC micellar medium.

    • Figure 11. 

      Pseudophase model for the Ru(III) mediated L-leucine Oxidation by DPC in CPC micellar medium.

    • [DPC] × 105 (M) kobs × 103 (s−1) (without CPC) kobs × 103 (s−1) (with CPC)
      1.75 1.92 ± 0.06 8.03 ± 0.16
      3.0 1.98 ± 0.09 8.09 ± 0.19
      6.0 2.01 ± 0.05 7.95 ± 0.21
      9.0 1.96 ± 0.07 8.11 ± 0.11
      12.0 1.86 ± 0.08 7.92 ± 0.16
      15.0 1.89 ± 0.06 8.13 ± 0.18
      17.5 1.95 ± 0.04 8.07 ± 0.14

      Table 1. 

      Effect of variation of [DPC] on rate constant (kobs) at [L-leucine] = 2.75 × 10-4 M, [OH−] = 0.02 M, [Ru3+] = 2.5 × 10-6, I = 0.1 M (KNO3), Temp = 298 K, [IO4−] = 5.5 × 10−4 M, [CPC] = 6.0 × 10−3 M.

    • I (KNO3), M kobs × 103, s−1
      (without CPC)      		 kobs × 103, s−1
      (with CPC)
      0.05 2.01 ± 0.09 8.07 ± 0.14
      0.10 1.92 ± 0.06 8.03 ± 0.16
      0.20 1.98 ± 0.04 8.00 ± 0.19
      0.30 1.97 ± 0.10 7.97 ± 0.20
      0.40 1.86 ± 0.08 7.94 ± 0.21
      0.50 1.93 ± 0.07 8.03 ± 0.12

      Table 2. 

      Effect of variation of [Electrolyte] on rate constant (kobs) at [DPC] = 1.75 × 10−5 M, [L-leucine] = 2.75 × 10−4 M, [OH−] = 0.02 M, [Ru3+] = 2.5 × 10−6, Temp = 298 K, [IO4−] = 5.5 × 10−4 M, [CPC] = 6.0 × 10−3 M.