高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

一种阳离子型铱(III)配合物与硅胶复合纳米发光材料的制备及其在潜指纹检测中的应用

李宜霏,线尚兰,蒋洲洋,唐怀军,夏溶蔓,王威贤,吴一冰,方秀英,李香,姜艾晶   

  1. 云南省高校绿色化学材料重点实验室，云南民族大学化学与环境学院
  • 收稿日期:2026-04-02 修回日期:2026-05-15 网络首发:2026-05-25 发布日期:2026-05-25
  • 通讯作者: 唐怀军 E-mail:tanghj74@ymu.edu.cn
  • 基金资助:
    国家自然科学基金（批准号：22361054和21762049）、云南省院士（专家）工作站项目（批准号：202605AF350008）资助

A Luminescent Nanomaterial of Cationic Iridium(III) Complex Composited with Silica: Preparation and Application in Latent Fingerprint Detection

LI Yi-Fei#, XIAN Shang-Lan#, JIANG Zhou-Yang, TANG Huai-Jun*, XIA Rong-Man, WANG Wei-Xian, WU Yi-Bing, FANG Xiu-Ying, LI Xiang, JIANG Ai-Jing   

  1. Key Laboratory of Green⁃Chemistry Materials in University of Yunnan Province, School of Chemistry & Environment, Yunnan Minzu University
  • Received:2026-04-02 Revised:2026-05-15 Online First:2026-05-25 Published:2026-05-25
  • Contact: Huai-Jun Tang E-mail:tanghj74@ymu.edu.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China (No. 22361054 and 21762049), the Yunnan Province Academician (Expert) Workstation Project (No. 202605AF350008)

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摘要： 以2-苯基吡啶（ppy）为主配体，2-氯-N-(1,10-菲啰啉-5-基)乙酰胺（phen-CAA）为辅助配体，合成了阳离子型铱(III)配合物[(ppy)2Ir(phen-CAA)]PF6。该配合物具有明显的聚集诱导发光增强（AIEE）效应，在CH3CN-H2O混合溶剂中（1.0 × 10-5 mol·L-1），发光强度随水含量体积百分比（fw）的增加而增大，在fw = 60%时，光致发光量子产率（PLQY）达到最大值30.7%，之后逐渐递减。[(ppy)2Ir(phen-CAA)]PF6在稀溶液（PLQY = 8.6%）和固态聚集（PLQY = 0.7 %）时发光均较弱，难以应用。在水中，以十六烷基三甲基氯化铵（CTAC）为模板剂，正硅酸乙酯（TEOS）为硅胶前驱体，水解制得掺杂该配合物的硅胶基复合物。最佳时，该复合物的PLQY高达25.9 %，并使[(ppy)2Ir(phen-CAA)]PF6的发光由橙红光（λem,max = 620 nm）转变为黄光（λem,max = 562 nm），为粒径主要在70~90 nm的球形颗粒。将所得复合粉末用于发光显现无孔和有孔载体上的潜指纹，均取得了较好的检测效果，指纹的一、二、三级特征细节均能在图像放大后予以辨识。

关键词: 阳离子型铱(III)配合物, 潜指纹检测, 硅胶, 复合发光材料, 聚集诱导发光增强

Abstract: A cationic iridium(III) complex [(ppy)2Ir(phen-CAA)]PF6 was synthesized by using 2-phenylpyridine (ppy) as the main ligand and 2-chloro-N-(1,10-phenanthrolin-5-yl)acetamide (phen-CAA) as the ancillary ligand. This complex exhibits an obvious aggregation-induced enhanced emission (AIEE) effect. In a CH3CN–H2O mixed solvent (1.0 × 10-5 mol·L-1), its luminescence intensity increased with the increasing volume fraction of water (fw), reaching a maximum photoluminescence quantum yield (PLQY) of 30.7% at fw = 60%, and then gradually decreased. [(ppy)2Ir(phen-CAA)]PF6 exhibited weak luminescence both in dilute solution (PLQY = 8.6%) and in the aggregated solid state (PLQY = 0.7%), making it difficult for practical applications. In water, using cetyltrimethylammonium chloride (CTAC) as the template agent and tetraethyl orthosilicate (TEOS) as the silica precursor, a silica-based composite containing the complex was prepared via hydrolysis. Under the optimal conditions, the composite exhibited a high PLQY of 25.9%, and the emission of [(ppy)2Ir(phen-CAA)]PF6 shifted from orange-red light (λem,max = 620 nm) to yellow light (λem,max = 562 nm). The composite was composed of spherical particles with a main size distribution of 70~90 nm. The obtained composite powder was used as a luminescent developer for latent fingerprints on both non-porous and porous substrates, and satisfactory detection performance was achieved. The first-, second-, and third-level fingerprint details could be identified after image magnification.

Key words:  Cationic iridium(III) complex, Latent fingerprint detection, Silica, Luminescent composite material, Aggregation-induced enhanced emission  

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