A Fluorimetric Method Based on an Imidazole Compound for Cu2+ Determination in Tap Water

Ion sensor properties of 4-(1-(4-hydroxy-3-methoxybenzyl)-1H-benzo[d]imidazol-2-yl)-2-methoxyphenol (L) in acetonitrile-water (1 : 1) were evaluated by fluorescence spectrometry. Pronounced quenching in the fluorescence spectra of the ligand was only observed for the Cu2+ ion among many metal ions. Linear fluorescence responses of the ligand at 360 nm as the function of the Cu2+ concentration were used for the determination of the Cu2+ ion in spiked tap water samples. Recovery values (R%) were satisfactory, and relative standard deviation (RSD%) was below 5.00 in intraday and interday measurements. Detection and quantification limits were 0.28 and 0.84 μg/L, respectively. The assay based on external calibration only took a few minutes.

A new field of application of saliva tests for prognostic purpose: focus on lung cancer

The aim of this work was to determine the potential prognostic role of the biochemical parameters of saliva in lung cancer. The study included 425 patients with lung cancer of various histological types. Saliva samples were collected before treatment and 34 biochemical parameters were determined. Prognostic factors were analyzed by multivariate analysis using Cox’s proportional hazard model. Results have shown that for squamous cell carcinoma, LDH activity below 1748 U/L was an independent prognostically unfavorable factor (HR = 2.89; 95% CI 1.28 – 6.46; р = 0.00330). For adenocarcinoma, there was a combination of factors: the content of imidazole compounds above 0.311 mmol/L, seromucoids below 0.098 c.u. and uric acid less than 83 nmol/mL (HR = 7.91; 95% CI 2.52 – 24.11; р = 0.00004). For neuroendocrine lung cancer, an unfavorable prognosis was associated with the urea content below 8 mmol/L, NO below 24 nmol/mL and ALP activity below 74 E/L (HR = 12.50; 95% CI 1.09 – 138.7; р = 0.01184). For radical surgery, an unfavorable prognosis was associated with LDH activity below 545 U/L (HR = 7.20; 95% CI 2.13 – 23.70; p = 0.00968), for combined treatment, with the NO level below 15 nmol/mL (HR = 5.64; 95% CI 1.89 – 16.46; p = 0.02797). The worst prognosis for palliative treatment was observed at the NO level below 24 nmol/mL and the imidazole compound content above 0.311 mmol/L (HR = 2.73; 95% CI 1.07 – 12.92; р = 0.01827). The identified parameters can be used to predict lung cancer and personalized patient’s treatment.

A pH-driven ring translocation switch against cancer cells

A molecular switch built with cucurbit[7]uril and a 3-station viologen-phenylene-imidazole compound has showed pH actuated ring translocation with high fatigue resistance and promising features against cancer cells.

Imidazolium-based titanium substrates against bacterial colonization

Photografting of a silane-derived imidazole compound on titanium substrates against bacterial colonization.

Synthesis, biological evaluation and molecular modeling of 1H-benzo[d]imidazole derivatives as novel anti-tubulin polymerization agents

A series of novel compounds (8a–21b) were designed and synthesized based on 2-phenyl-1H-benzo[d]imidazole. Compound 18b showed the most potent in vitro growth inhibitory activity and significant tubulin polymerization inhibitory activity.

A Series of Imidazole Derivatives: Synthesis, Two-Photon Absorption, and Application for Bioimaging

A new series of D-π-A type imidazole derivatives have been synthesized and characterized. Two corresponding imidazolium salts (iodine and hexafluorophosphate) were prepared from the imidazole compound. Their electron-withdrawing ability can be largely tunable by salt formation reaction or ion exchange. UV-vis absorption and single-photon fluorescence spectra have been systematically investigated in different solvents. The two-photon cross sectionsδ2PAof the imidazole derivatives are measured by two-photon excited fluorescence (2PEF) method. Compared with those ofT-1(107 GM) andT-3(96 GM),T-2(imidazolium iodine salt) has a large two-photon absorption (2PA) cross section value of 276 GM. Furthermore, the cytotoxicity and applications in bioimaging for the imidazole derivatives were carried out. The results showed thatT-1can be used as a lysosomal tracker with high stability and water solubility within pHs of 4–6, whileT-2andT-3can be used as probes for cell cytoplasm.