纳米尺度AgBr／Ⅰ乳剂颗粒的光电子衰减行为

本文以鱼明胶为保护介质,在不同的鱼明胶 溴化银比值下,采用双注法制备AgBr/I纳米颗粒乳剂,以TEM观测颗粒形态,据此统计得出该乳剂中AgBr/I纳米颗粒平均粒径(d)及粒径分布系数(|±σ|/d).鱼明胶 溴化银比值在0.31g/mmol—0.62g/mmol范围内,颗粒平均粒径仅有微小变化,但粒径分布系数随该比值的增大而减小,表明颗粒均一性提高.采用微波光导法对该纳米尺度AgBr/I乳剂颗粒的光电子衰减过程进行测试,结果表明,纳米尺度Ag Br/I乳剂颗粒的光电子衰减过程为双组分,即初始快衰减和随后慢衰减,其衰减过程皆符合一级动力学规律.该纳米尺度乳剂颗粒光电子寿命较常规乳剂颗粒明显缩短.

THE DECAY PROCESSES OF PHOTOELECTRONS OF NANO-SIZED AgBr/I EMULSION PARTICLES

9-(Phenyloxymethyl)anthracene 3 were prepared by the coupling reaction between 9- chloromethylanthracene and mono ethers 2 which were synthesized by the etherization between benzyl chloride and hydroquinone or resorcin.The intra-molecular photocycloaddition reaction of 3 between anthracene and benzene rings did not occur because the bond of -phenyl-O-CH_2-anthryl- of 3 might be easily cleaved under irradiation with UV.Thus,biplanene 4 and lepidopterene 5 were formed by the cleavage of the bond and rearrangement of the radical under the irradiation of the diluted solution of 3 with UV.