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AIE + ESIPT based red fluorescent aggregates for visualization of latent fingerprints†
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2018-06-21 00:00:00 , DOI: 10.1039/c8nj02646g
Harminder Singh 1, 2, 3, 4, 5 , Rashmi Sharma 1, 5, 6, 7 , Gaurav Bhargava 5, 8, 9, 10 , Subodh Kumar 1, 2, 3, 4, 5 , Prabhpreet Singh 1, 2, 3, 4, 5
Affiliation  

Fluorescent molecules are extensively employed in (bio)sensing and bioimaging but their applications in the visualization of fingerprints are less reported due to their inherited aggregation-caused quenching (ACQ) mechanism in the solid state (aggregated form). DPSA undergoes self-assembly to form aggregates with rod-like structures in a 90% H2O : CH3CN mixture evident from dynamic light scattering (DLS) and scanning electron microscopic (SEM) techniques. The self-assembled diphenylpyrimidinone (DPSA) derivative shows aggregation-induced emission (∼24 fold) in a >90% H2O : CH3CN mixture with orange-red fluorescence (λmax 564 nm). The red fluorescent aggregates of DPSA show applications in the visualization of latent fingerprints on aluminium, stainless steel and metal currency coin substrates. In addition, we established the individuality of three subjects based on information gathered at level one (pattern of arch, loop or whorl) and level two (minutiae details of dots, bifurcation, ridge ending, core and delta).

中文翻译:

基于AIE + ESIPT的红色荧光聚集体,用于可视化潜在指纹

荧光分子广泛用于(生物)传感和生物成像中,但由于其在固态(聚集形式)中的遗传聚集引起的猝灭(ACQ)机制,因此在指纹可视化中的应用报道较少。DPSA经过自组装以在90%H 2 O:CH 3 CN混合物中形成具有棒状结构的聚集体,这从动态光散射(DLS)和扫描电子显微镜(SEM)技术可以明显看出。自组装的二苯基嘧啶酮(DPSA)衍生物在大于90%的H 2 O:CH 3 CN混合物中显示聚集诱导的发射光(〜24倍),具有橙红色荧光(最大λ564 nm)。DPSA的红色荧光聚集体显示了在铝,不锈钢和金属货币硬币基材上的潜在指纹可视化中的应用。此外,我们根据第一级(弓形,环形或螺纹状)和第二级(点,分叉,山脊末端,核心和三角洲的细部细节)收集的信息确定了三个主题的个性。
更新日期:2018-06-21
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