钐钆共掺杂荧光配合物的合成及在潜手印显现中的应用  

Synthesis of samarium-gadolinium co-doped rare earth fluorescent complex and their applications in latent fingerprint development

作　　者：辛翠[1] 王猛[2] 魏涓 肖骏 黄鑫 XIN Cui;WANG Meng;WEI Juan;XIAO Jun;HUANG Xin(Department of Criminal Science and Technology,Hunan Police College,Changsha 410138,China;Department of Trace Examination,National Police University of China,Shenyang 110035,China)

机构地区：[1]湖南警察学院刑事科学技术系,湖南长沙410138 [2]中国刑事警察学院痕迹检验技术系,辽宁沈阳110035

出　　处：《化学研究与应用》2022年第1期119-125,共7页Chemical Research and Application

基　　金：国家自然科学基金青年基金项目(21205139、21802169)资助;湖南省教育厅科学研究项目优秀青年课题(20B209)资助。

摘　　要：以2-噻吩甲酰三氟丙酮(TTA)为第一配体,邻菲罗啉(o-Phen)为第二配体,利用共沉淀法合成一系列钐钆共掺杂荧光配合物,并优化了该系列荧光配合物的合成条件(反应温度、体系pH、稀土离子相对含量)。将最优条件合成的Sm_(0.5)Gd_(0.5)TTA_(3)(o-Phen)荧光配合物粉末用于常见光滑非渗透性客体表面潜在手印的显现,从灵敏度、对比度、选择性、适用性等方面对显现手印效果进行了详细考察。结果表明,显现后的手印在365nm紫外光的激发下,手印与客体背景呈现强烈的颜色反差,手印纹线连贯清晰,细节特征明显可见。该粉末显现手印对比度高,选择性好,适用性强,对陈旧手印也表现出较好的显现效果。A series of rare earth fluorescent complexes containing Samarium-Gadolinium co-doped were synthesized via a precipitation approach,using 2-Thienyl trifluoroacetone(TTA)as the first ligand,respectively,and o-Phen as the second ligand.Their synthesis conditions were also optimized systematically,including reaction temperature,system pH,relative content of rare earth ions.The powders of Sm_(0.5)Gd_(0.5)TTA_(3)(o-Phen)complex synthesized under optimal conditions were used to develop the latent fingerprints on various of smooth substrates.The sensitivity,contrast,selectivity,applicability for handprint development were investigated in detail.The results showed that the contrast between the developed fingerprint and the substrate was quite high,under the excitation of 365nm ultraviolet light.Handprint lines are coherent and clear,and the details are clearly visible.Therefore,the rare earth fluorescent complex had high contrast,good selectivity and strong applicability for developing latent fingerprints,and also showed a better develop effect for old fingerprints.

关 键 词：手印显现 荧光配合物 手印 钐 钆 

分 类 号：O657.3[理学—分析化学]