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CHEM01200604005 A. K. Pathak - Homi Bhabha National Institute

CHEM01200604005 A. K. Pathak - Homi Bhabha National Institute

CHEM01200604005 A. K. Pathak - Homi Bhabha National Institute

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M <br />

DE<br />

= (r, ω)C DE , (r, ω) C DE , ] + (22)<br />

M <br />

DE<br />

= (r, ω)C DE , (r, ω) C DE , ] + (23)<br />

<br />

C DE , = S(0) ρg, ; , = S(0) ρg <br />

, (24)<br />

<br />

C DE , S0 <br />

C DE , S0 <br />

<br />

ρ<br />

<br />

ρ<br />

ρg , <br />

ρg , <br />

<br />

0 <br />

<br />

ρg , (25)<br />

0 <br />

<br />

ρg , (26)<br />

Equations (16) and (17) are derived based on some approximations including<br />

truncation of higher order terms, and the accuracy of these expressions can be tested if<br />

experimental results are available for the systems with large and wide range of values of<br />

n. However, the results are available for the systems clusters of small size, since<br />

experimentally, it is difficult to prepare the clusters of desired size. Therefore, to obtain<br />

the bulk values of ∆E DE ∞ and ∆E DE ∞ from the knowledge of experimental results<br />

of ∆E VDE (n) and ∆E ADE (n) for few clusters of finite size is problematic. So what is<br />

needed are expressions for ∆E VDE (n) and ∆E ADE (n) valid for small size clusters that<br />

converge to the respective equations (16) and (17) valid for large size clusters. Motivated<br />

by the derived Eqs.(16) and (17), the more general expressions similar to those equations<br />

defined as is proposed<br />

∆E VDE (n) = ∆E DE ∞ + M DE<br />

+ M DE<br />

(27)<br />

<br />

∆E ADE (n) = ∆E DE ∞ M DE<br />

+ M DE<br />

, (28)<br />

by introducing a parameter<br />

representing the contribution from the solute volume as<br />

well as the charge on the solute ion. It is assumed here that the parameter<br />

to be given by<br />

129

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