冠醚化合物对乳剂晶体外延生长的调变作用  

THE CROWN COMPOUNDS AS MODIFIERS FOR AgX EPITAXIAL GROWTH

作　　者：李晓玲[1] 周本茂[1] 

机构地区：[1]中国科学院感光化学研究所,北京100101

出　　处：《感光科学与光化学》1993年第4期356-360,共5页Photographic Science and Photochemistry

摘　　要：本工作研究了冠醚化合物在外延乳剂生长过程中的调变作用。结果表明,1,4,7,10,13,16-六氧杂环十八烷对AgBr八面体乳剂无侵蚀作用,对非同晶系晶体之间的外延不起调变作用。1,7,10,16-四氟-4,13-二氮代杂环十八烷均使AgBr八面体乳剂的棱角产生了不同程度的侵蚀,可充当不同晶系晶体外延生长的调变剂,对晶体的溶解侵蚀能力依2S-18-C-6,2N-18-C-6,18-C-6的次序降低。这与它们同Ag^+络合能力的强弱一致。2S-18-C-6,2N-18-C-6仅对非同晶系晶体之间的外延起调度作用,而对同晶系晶体的外延不起调查作用。冠醚化合物对晶体外延生长的调变作用与冠醚化合物对晶体的络合溶解作用有关。It was found that l,7,10,16-tetraoxa-4,13-dithiacyclooctadecan (2S-1 8-C-6)and 1,7,10,16-tetraoxa-4,13-diazacyclooctadecan (2N-18-C-6)can act as modifiers when epitaxial deposition occurs to nonisomorphic silver salt, while 1,4,7,10,13,16-hexaoxacyclo-octadecan (18-C-6)can ont. They have no effect on the epitaxial growth of the isomorphic crystals. The aza-and thiacrown ethers can also etch the host grains, and their etching abilities decrease in the order of 2S-18-C-6, 2N-18-C-6and 18-C-6, they are the same as complexing abilities with Ag+ .In fact ,18-C-6 does not etch the octahedral AgBr emulsion. The modification of epitaxial deposition by the crown ether is related much to the comlexing between the crown ether and Ag+ and, therefore, the solubilization of the crystal in the crown ether.

关 键 词：冠醚 外延乳剂 调变剂 

分 类 号：TQ575.1[化学工程—精细化工]