高等学校化学学报 ›› 2026, Vol. 47 ›› Issue (11): 20260137.doi: 10.7503/cjcu20260137

• 研究论文: 无机化学 • 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. 云南民族大学化学与环境学院,云南省高校绿色化学材料重点实验室,昆明 650500
  • 收稿日期:2026-04-01 出版日期:2026-11-10 发布日期:2026-05-25
  • 通讯作者: 唐怀军 E-mail:tanghj74@ymu.edu.cn
  • 作者简介:第一联系人:共同第一作者.
  • 基金资助:
    国家自然科学基金(22361054;21762049);云南省院士(专家)工作站项目(202605AF350008)

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

LI Yifei, XIAN Shanglan, JIANG Zhouyang, TANG Huaijun(), XIA Rongman, WANG Weixian, WU Yibing, FANG Xiuying, LI Xiang, JIANG Aijing   

  1. Key Laboratory of Green?Chemistry Materials in University of Yunnan Province,School of Chemistry & Environment,Yunnan Minzu University,Kunming 650500,China
  • Received:2026-04-01 Online:2026-11-10 Published:2026-05-25
  • Contact: TANG Huaijun E-mail:tanghj74@ymu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22361054;21762049);the Yunnan Province Academician(Expert) Workstation Project, China(202605AF350008)

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), 发光强度随水含量(体积分数, 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在稀溶液中(PLQY=8.6%)和固态聚集态下(PLQY=0.7%)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. 在最佳条件下, 该复合物为粒径主要分布在70~90 nm的球形颗粒, PLQY高达25.9%, 并使[(ppy)2Ir(phen-CAA)]PF6的发光由橙红光(λem, max=625 nm)转变为黄光(λem, max=562 nm). 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 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), 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=625 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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