Quantitative Kinetic Analysis of Photochromic Reactions

Abstract

Photochemical reactions and photochromic reactions are attractive tool as a key step of a variety of functional materials for microelectonics and photonics, and as a molecular probe investigating microstructure of various solid state polymers. Quantitative analysis of the dynamics of the photochemical and photochromic reactions in every stage of the reaction is very important because it involves valuable information on the temporal polymer matrix, while an estimation of the overall quantum yield only gives the average of the kinetics in time and space. This paper presents a basic theory on the kinetics of some photochemical and photochromic reactions. Based on the theory, quantum yield distribution of an azo compound is found to be much larger than that of a diazo compound.

An analytical solution for the kinetics of AB(1k,1ϕ) systems and its application to a spirobenzopyran

“…(9), (10), (16), (17), and (19b)) that define the reactive AB(1 k ,2ϕ) system and which are used to evaluate the five unknowns ( C PSS A , C PSS B , ε λ B , ϕ BA , and ϕ AB ) are nonlinear equations. Accordingly, for this case, the solution can either be achieved analytically when at least one of the unknowns is accessible by alternative means, or approached by introducing simplifying approximations in the treatment 12–20.…”

Useful Spectrokinetic Methods for the Investigation of Photochromic and Thermo-Photochromic Spiropyrans

“…Dozens of approaches have been proposed thus far for the various AB reaction cases [8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44]. These methods met with varying success.…”

The Photopolymer Science and Technology Award

“…[3][4][5][6][7] The LC droplet on a water surface continuously underwent a flattening of its lens shape and became larger upon photoirradiation. The final area of the LC droplet is 6-7 times larger than the initial state after expansion.…”