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Discontinuous behavior of Rayleigh relaxation in supersaturated aqueous NH 4 H 2 PO 4 solution
Author(s) -
Wu GuoZhen,
Huang Yi
Publication year - 1992
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.19920100203
Subject(s) - chemistry , supersaturation , aqueous solution , relaxation (psychology) , rayleigh scattering , constant (computer programming) , saturation (graph theory) , thermodynamics , time constant , organic chemistry , optics , physics , psychology , social psychology , mathematics , electrical engineering , combinatorics , computer science , programming language , engineering
Abstract The algorithm of Rayleigh intensity correlation is employed for the elucidation of relaxation time constants of the aqueous NH 4 H 2 PO 4 solution with various concentrations. The result shows that there is a discontinuous (abrupt) increases in the relaxation time constant as the super‐saturation state is reached. This quantity, the relaxation time constant, therefore, can be an order parameter. Also discussed is the dependence of the relaxation time constant on the aggregation number n in (H 2 PO 4 − ) n . This dependence is complicated and may be crucial in understanding the aggregation process in the supersaturation state.