Combined fabrication of zeolitic imidazolate framework-8 and lanthanide towards coordination polymers: A dual-signal fluorescent probe for sensing Cu < sup > 2+ < /sup > based on synergistic e ffect of aggregation-induced emission and antenna effect
Talanta. 2024 Mar 18;273:125941. doi: 10.1016/j.talanta.2024.125941. Online ahead of print.ABSTRACTCopper ion (Cu2+) detection remains an important task for monitoring water quality because of its specific toxicity. Herein, a new dual-signal fluorescent probe was developed by combining zeolitic imidazolate framework-8 (ZIF-8) and lanthanide for the detection of Cu2+ for the first time. The lanthanide coordination polymer (guanosine monophosphate and Eu3+, GMP/Eu) was initially incorporated into ZIF-8 to yield ZIF-8/GMP/Eu nanomaterials with extremely weak single emission fluorescence at 618 nm. It was found that the resul...
Source: Talanta - March 22, 2024 Category: Chemistry Authors: Yanmei Si Yanli Li Jianli Guo Hua Wang Xinfang Wang Jia Fu Source Type: research
Ultrasensitive detection of tyrosinase with click reaction-combined dark-field imaging platform
In this study, we developed an ingenious and powerful method for the ultrasensitive detection of TYR by click reaction-combined dark-field microscopy. This method begins with the formation of cuprous ions (Cu+) based on the reduction of copper ions (Cu2+) by ascorbic acid (AA). Subsequently, the formed Cu+ can catalyze the crosslinking between azide- and alkyne-functionalized gold nanoparticles, causing a significant red-shift in the scattering spectrum. However, AA can chelate with TYR, which inhibits the generation of Cu+ and subsequent click reaction, thus achieving TYR-controlled scattering spectral shift. The proposed...
Source: Talanta - March 22, 2024 Category: Chemistry Authors: Zi-Yue Jin Cai-Hong He Cheng-Ye Xi Yi Wang Eshtiag Abdalla Bin-Bin Chen Da-Wei Li Source Type: research
Development and validation of a versatile non-invasive urinary steroidomics method for wildlife biomonitoring
This study presents a validated steroidomics method for the (un)targeted screening of a wide range of sex and stress steroids and related molecules in urine using ultra-high performance liquid chromatography coupled to high-resolution mass spectrometry (UHPLC-HRMS). In total, 50 steroids (conjugated and non-conjugated androgens, estrogens, progestogens and glucocorticoids) and 6 prostaglandins could be uniquely detected. A total of 45 out of 56 compounds demonstrated a detection limit below 0.01 ng μL-1. Excellent linearity (R2 > 0.99), precision (CV < 20 %), and recovery (80-120 %) were observed for 46, 41, and 39 ...
Source: Talanta - March 22, 2024 Category: Chemistry Authors: Tom Cools Kirsten S Wilson Desheng Li Catherine Vancsok Baptiste Mulot Antoine Leclerc Jos é Kok Marko Haapakoski Mads F Bertelsen Andreas Ochs Simon J Girling Yingmin Zhou Rengui Li Lynn Vanhaecke Jella Wauters Source Type: research
An electrochemiluminescence sensor based on lanthanide bimetallic MOFs with a "cascade sensitization mechanism" for the sensitive detection of CA242
Talanta. 2024 Mar 21;273:125956. doi: 10.1016/j.talanta.2024.125956. Online ahead of print.ABSTRACTLanthanide metal-organic frameworks (Ln-MOFs) broaden the optical sensing applications of lanthanide ions due to the antenna effect between organic ligands and metals. However, the sensitization ability of the ligand to metal ions is limited, and maximizing the sensitization of the electrochemiluminescence behavior of Eu3+ is still a challenge for the application of Ln-MOFs. Therefore, under the guidance of the "cascade sensitization mechanism" based on the antenna effect sensitizing the electrochemiluminescence of bimetallic...
Source: Talanta - March 22, 2024 Category: Chemistry Authors: Fengqian Xie Chaoqun Shen Xinli Li Ping Xiao Shujun Wang Yueyuan Li Hongzhen Sun Ping Wang Yueyun Li Qing Liu Source Type: research
A luminescent organic cocrystal for detecting 2,4-dinitroaniline
This study not only provided an environmentally friendly gram-level preparation strategy to synthesize the fluorescent material but also investigated their application in chemical detection.PMID:38513470 | DOI:10.1016/j.talanta.2024.125919 (Source: Talanta)
Source: Talanta - March 21, 2024 Category: Chemistry Authors: Yanxiong Liu Ruiying Zhang Na Zou Hao Li Xin Hu Wenwen Fan Yi Cheng Li-Yan Zheng Qiu-E Cao Source Type: research
