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利用紫外光照射制得了Ag4^2+团簇,并分别研究了氨基酸,甘氨酸,谷氨酸,羟脯氨酸对Ag4^2+的稳定作用,发现Ag4^2+均能被这4种氨基酸稳定,而且蛋氨酸的稳定作用强。 相似文献
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Thesensitivityofsilverhalideemulsionscouldbeimprovedgreatlyafterbeingchemicallysensitized.Thematterwhichplaysanimportantroleisthesocalledsensitizationcentersformedduringthechemicalsensitizationprocess.Thestudyontheformatin,natureandfunctionofthesecent… 相似文献
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Formation of silver sulfide binary cluster ions,as well as the effects of silver and sulfur content proportion,the cluster size range,the influence of laser fluence,the UV laser photolysis,etc.,was studied with the laser ablation method and a tandem time-of-flight mass spectrometer.The results show that there exist two different forms of positively charge-bearing cluster ions;[(Ag2S)n Ag] + and [ (Ag2S)n-1 Ag3]+.The most possible forms of the sulfur sensitization centers acting as traps of photoelectrons are [Ag2S] +,[ Ag2S Ag] +,[ Ag2S Ag3]+ and the analogs. 相似文献
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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Ag^2+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Ag^2+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的沅影形成过程中起着很大作用。 相似文献
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