Bifunctional color-tuning luminescent Ln@Zr-MOFs for white LEDs and sensitive, ultrafast detection of nitrobenzene in aqueous media. Issue 5 (19th January 2022)

• Record Type: Journal Article
• Authors: Cao, Mengmeng; Xia, Chao; Liu, Yunpeng; Xia, Jinfeng; Jiang, Danyu; Zhou, Guohong; Xuan, Tongtong; Li, Huili
• Is Part Of: Journal of materials chemistry. Volume 10:Issue 5(2022)
• Page Start: 1690
• Page End: 1697
• Publication Date: 2022-01-19
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d1tc05243h
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Sensitive and rapid detection of nitrobenzene in aqueous media using a fluorescent Eu@Zr-MOF. Abstract : Rapid and quantitative detection of nitrobenzene (NB) in wastewater is of great significance to protect the natural environment and human health. In this work, bifunctional Ln@Zr-MOFs based on UiO-66 were successfully fabricated by partially replacing terephthalic acid (H2 BDC) ligands with m -phthalic acid ( m -H2 BDC) ligands and post-synthetic modification (PSM) with Ln 3+ (Ln 3+ = Eu 3+, Tb 3+ ). The "antenna effect" of the m -H2 BDC ligands makes Ln@Zr-MOFs exhibit the characteristic emissions of Ln 3+ . By adjusting the amount and type of Ln 3+, controllable color-tuning emissions can be easily realized, which endows them with a great application prospect for white LEDs. On the other hand, Eu10 @Zr-MOFs can serve as a turn-off fluorescent switch of NB because the red emission from Eu 3+ can be easily quenched by NB through a photoinduced electron transfer (PET) process between NB and its ligands, and as a result, NB is successfully recognized. Particularly, Eu10 @Zr-MOFs as a fluorescent probe have shown many appealing properties, such as high sensitivity (limit of detection is 1.04 μM, limit of quantification is 3.48 μM, and K sv = 24459.71 M −1 ), quick response (less than 60 s), a broad response window (0–180 μM), excellent selectivity, and strong anti-interference ability. The real detection results of NB concentration in natural water samples have demonstrated that the reported Eu10 @Zr-MOFs are a potential fluorescent material that can precisely and sensitively perform fluorescence sensing of NB.