Optical Properties of Metallic Copper in Relation to the Photochromic System CuCl(s)-H2O(l)

Carlsson, Bo (författare): Department of Physical Chemistry, The Royal Institute of Technology, S-100 44, Stockholm 70, Sweden

Wettermark, Gunnar (författare)

(creator_code:org_t)

Elsevier BV, 1976
1976
Engelska.
Ingår i: Journal of Photochemistry. - : Elsevier BV. - 0047-2670. ; 5:4, s. 321-328

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Abstract Ämnesord

Stäng

An extended Mie theory has been used to interpret the green colour change observed in the photochemical disproportionation of CuCl. Comparison of calculated and experimental spectra leads to the following conclusions: (i) the green colour arises from colloidal metallic copper in CuCl present in low concentrations (<5 vol %); (ii) the colloid consists of particles with an average diameter of about 3 nm in diameter and probably oblate in shape with an axis ratio of about 0.6; (iii) under the conditions of the present experiment the spectrum of the green species stayed constant, i.e. continued exposure has primarily the effect of increasing the number of copper particles without affecting their size and shape.

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