影像科学与光化学 ›› 1992, Vol. 10 ›› Issue (3): 284-288.DOI: 10.7517/j.issn.1674-0475.1992.03.284

• 研究简报 • 上一篇    

冠醚对溴化银乳剂的增感作用

符玉华1, 周本茂1, 李晓玲1, 张成刚1, 任新民1, 杨季秋2, 胡培斌2, 秦勇2, 罗世琼2, 李生健2   

  1. 1. 中国科学院感光化学研究所 北京 100101;
    2. 中国科学院成都有机化学研究所 成都 610015
  • 收稿日期:1991-09-03 修回日期:1992-04-20 出版日期:1992-08-20 发布日期:1992-08-20
  • 通讯作者: 符玉华

THE SENSITIZATION OF SILVER BROMIDE EMULSION WITH CROWN COMPOUND

Fu YU-HUA1, ZHOU BEN-MAO1, ZHANG CHEN-GONG1, LI XIAO-LING1, REN XIN-MIN1, YANG JI-QIU2, HU PEI-BIN2, QIN YONG2, LUO SHI-QIONG2, LI SHENG-JIAN2   

  1. 1. Institute of Photographic Chemistry, Academia Sinica, Beijing 100101, P. R. China;
    2. Institute of Organic Chemistry, Academia Sinica, Chengdu 610015, P. R. China
  • Received:1991-09-03 Revised:1992-04-20 Online:1992-08-20 Published:1992-08-20

摘要: 近年来,已有将冠醚化合物用于卤化银感光乳剂中的一些报道[1-4]。为了改善卤化银感光材料的性能,我们将合成的一种新冠醚——N-对甲苯磺酰基-7-氮杂-1,4,10,13-四硫杂环十六烷(NTsTTH)用于卤化银乳剂中,发现它能提高卤化银乳剂的感光度。

关键词: 感光乳剂, 感光度, 调变剂

Abstract: In the present work, it was found that N-toluensulfonyl-7-aza-1, 4, 10, 13-te-trathiacyclohexadecane (NTsTTH) can sensitize AgBr emulsion and the sensitivity-can be increased from 3 to 12.5. The growth of AgBr crystals under the action of NTsTIH was studied with transmitance electron microscopy (TEM), and it was found that NTsTTH acts as a modifier in crystals growth. The ionic conductivity of AgBr emulsion sensitized with NTsTTH decreases with increasing amount of NTsTTH. When excess NTsTTH was added to the emulsion, fog was significantly-increased. According to the results, a hypothetical sensitization mechanism was suggested: when NTsTTH is added to the emulsion, it will combine with the positively charged kink sites (Ag+) on the silver bromide microcrystal forming complex (1) which is possible to become sensitization centers. During this process (1) a disproportionate reaction may occur (2) Ag+ + NTsTTH——Ag(NTsTTH)+ (1) 2Ag+ + NTsTTH——Ag(NTsTTH)2+ + Ag° (2) and the Ag atoms may aggregate to form fog centers or reduction sensitization centers.

Key words: photographic emulsion, sensitivity, modifier