The fluorescence of a mercury probe based on osthol

• Guangyan Luo,
• Zhishu Zeng,
• Lin Zhang,
• Zhu Tao and
• Qianjun Zhang

Beilstein J. Org. Chem. 2021, 17, 22–27, doi:10.3762/bjoc.17.3

• be used for the quantitative detection and monitoring of mercury ions in the environment. Results and Discussion OST fluorescence probe for Hg2+ identification Selectivity of the fluorescent OST probe to metal ions The specificity of a probe for metal ions is the key factor to evaluate the

• selectivity for Hg2+. The fluorescence intensity of OST showed a good linear correlation with the Hg2+ concentration (6.0 × 10−5 to 24.0 × 10−5 mol∙L−1, R2 = 0.9954), and the detection limit of the probe was 5.04 × 10−8 mol∙L−1, which can be used for the determination of Hg2+ traces. Keywords: fluorescence

• probe; mercury; recognition mechanism; Introduction Mercury is a dangerous heavy-metal pollutant. Inorganic mercury (Hg2+) can be transformed into methyl mercury (MeHg+) by sulfate-reducing bacteria [1][2][3]. MeHg+ can accumulate in organisms through the food chain, resulting in serious and

Heterogeneous photocatalysis in flow chemical reactors

• Christopher G. Thomson,
• Ai-Lan Lee and
• Filipe Vilela

Beilstein J. Org. Chem. 2020, 16, 1495–1549, doi:10.3762/bjoc.16.125

N-doped carbon dots covalently functionalized with pillar[5]arenes for Fe³⁺ sensing

• Jia Gao,
• Ming-Xue Wu,
• Dihua Dai,
• Zhi Cai,
• Yue Wang,
• Wenhui Fang,
• Yan Wang and
• Ying-Wei Yang

Beilstein J. Org. Chem. 2019, 15, 1262–1267, doi:10.3762/bjoc.15.123

• +, Cr3+, Fe3+, and Zr4+) were added into the fluorescent CCDs system, respectively. As shown in Figure 3a, Fe3+ could almost completely quench the fluorescence of CCDs among all metal ions at a final concentration of 400 μM, illustrating that CCDs could serve as a potential fluorescence probe for

Diaminoterephthalate–α-lipoic acid conjugates with fluorinated residues

• Leon Buschbeck,
• Aleksandra Markovic,
• Gunther Wittstock and
• Jens Christoffers

Beilstein J. Org. Chem. 2019, 15, 981–991, doi:10.3762/bjoc.15.96

• example for an application in biochemistry, Figure 1 shows a compound with cyclooctyne and maleimide as functional units. It was used as a "turn-on" fluorescence probe for cross-linking proteins [13]. The highly reactive cyclooctyne residue undergoes 1,3-dipolar cycloadditions with organoazides (copper

Fluorescent carbon dots from mono- and polysaccharides: synthesis, properties and applications

• Stephen Hill and
• M. Carmen Galan

Beilstein J. Org. Chem. 2017, 13, 675–693, doi:10.3762/bjoc.13.67

• their surface. The PL intensity of the CDs was modified in a linear manner with Ag+ concentrations, and as such the nanoparticles could be utilised as a fluorescence probe to detect Ag+ in solution up to concentrations of 0–25 μM. β-Cyclodextrin has also been utilised in the synthesis of CDs using a

Amyloid-β probes: Review of structure–activity and brain-kinetics relationships

• Todd J. Eckroat,
• Abdelrahman S. Mayhoub and
• Sylvie Garneau-Tsodikova

Beilstein J. Org. Chem. 2013, 9, 1012–1044, doi:10.3762/bjoc.9.116

Interaction of cyclodextrins with pyrene-modified polyacrylamide in a mixed solvent of water and dimethyl sulfoxide as studied by steady-state fluorescence

• Akihito Hashidzume,
• Yongtai Zheng and
• Akira Harada

Beilstein J. Org. Chem. 2012, 8, 1312–1317, doi:10.3762/bjoc.8.150

• one to construct functional systems that convert photo energy based on molecular recognition. Among aromatic compounds, pyrene is the most examined as a fluorescence probe or label because it shows a relatively high fluorescence quantum yield and a relatively long fluorescence lifetime in both monomer

Ratiometric fluorescent probe for enantioselective detection of D-cysteine in aqueous solution

• Xiao-bo Zhou,
• Wing-Hong Chan,
• Albert W. M. Lee and
• Chi-Chung Yeung

Beilstein J. Org. Chem. 2011, 7, 1508–1515, doi:10.3762/bjoc.7.176

• documented [22][23][24][25][26][27][28]. As an improved sensing device, a ratiometric fluorescence probe monitors the emission intensities at two different wavelengths, which should provide a built-in correction for instrumental defects and photodegradation of sensing materials. In this context, a few

Ring opening metathesis polymerization-derived block copolymers bearing chelating ligands: synthesis, metal immobilization and use in hydroformylation under micellar conditions

• Gajanan M. Pawar,
• Jochen Weckesser,
• Siegfried Blechert and
• Michael R. Buchmeiser

Beilstein J. Org. Chem. 2010, 6, No. 28, doi:10.3762/bjoc.6.28

• , metal loading of poly(M1-co-M2) The cmc of poly(M1-co-M2) was determined by fluorescence spectroscopy [23]. For measurements in water, 6-p-toluidene-2-naphthylsulfonic acid (10−6 mol/L) was used as the fluorescence probe. A cmcwater for poly(M1-b-M2) of 2.8 × 10−6 mol L−1 was determined (Figure S3

• were determined by fluorescence spectroscopy [23] using 6-p-toluidene-2-naphthylsufonic acid (10−6 M) as the fluorescence probe. Polymer solutions were prepared in a concentration range from 1 × 10−4–1 × 10–13 mol L–1. cmc of poly(M1-b-M2) = 2.8 × 10−6 mol L−1; cmc of poly(M1-b-M2)-Rh = 2.2 × 10−6 mol