赖氨酸对水溶液中的银团簇Ag_4^(2+)的稳定能力的研究

A Study of the Stabilizing Capacity of Lysinetoward Silver Cluster Ag2+4 in Aqueous Solution

用溴钨灯照射含异丙醇、赖氨酸（稳定剂）和硝酸银的水溶液制得非金属银团簇Ａｇ２＋４（λｍａｘ＝２７０ｎｍ），其产率随赖氨酸酸量的增加以及溶液起始ｐＨ的减小而增加，并且在空气中赖氨酸可以稳定数天，这种稳定作用一方面与Ａｇ２＋４本身的性质有关，另一方面与其和赖氨酸形成的络合物有关。基于此提出带正电荷的银团簇在感光潜影形成过程中起着很大作用。

Nonmetallic silver clusters Ag ere prepared by tungsten-bromine lightillumination of AgNO3 aqueous solution containing isopropanol and lysine which acts as a stabillzer.The Ag clusters,whose yields increase with the lysine added and with the decrease of initiate pH of the solution,are stabilized by lysine greatly and last for days or more.These observations and thepossible contribution of Ag to the photographic latent image formation process are present