Study on Amidation Reaction between CdS/PAMAM and Amino Acid and Its Application to Latent Fingerprint Development
WANG Yuan-feng1, WANG Yan-ji1, YANG Rui-qin1*, JIN Yu-juan2
1. Forensic Science Department, Chinese People’s Public Security University, Beijing 100038, China 2. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
Abstract：A new method for the development of latent fingerprints by CdS/PAMAM nanocomposites was explored in the present research. Amidation reaction between terminal carboxylate groups of amino acids and terminal amino groups of PAMAM G4.5 dendrimers was studied by FTIR spectrometry. The reacting processes under different conditions were monitored by H1 267/1 735 (the relative ratio of peak height) in order to find out the optimized condition and developing method. The results indicated that the reacting processes were affected remarkably by the changes in temperature. The reaction was efficient under 90 ℃ within 4 hours, while the reacting speed decreased after 3 hours under 120 ℃. CdS/PAMAM was utilized as the latent fingerprint developing reagent and compared with the routine one. The results indicated that the fluorescence intensity of the former is 65 times higher than that of the latter. Great predominance in florescence could be observed when CdS/PAMAM and the routine developing reagent were compared. Latent fingerprints on the surface of different objects were developed under 120 ℃ within 0.5-3 h. Good developing results could be obtained under the optimized condition. The method is simple, rapid, highly sensitive, safe and economical.
王元凤1,王彦吉1,杨瑞琴1*,靳玉娟2. CdS/PAMAM与氨基酸作用研究及其在潜在指印显现中的应用[J]. 光谱学与光谱分析, 2008, 28(12): 2843-2846.
WANG Yuan-feng1, WANG Yan-ji1, YANG Rui-qin1*, JIN Yu-juan2. Study on Amidation Reaction between CdS/PAMAM and Amino Acid and Its Application to Latent Fingerprint Development. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2008, 28(12): 2843-2846.
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