The controllable synthesis of multi-color carbon quantum dots modified by polythiophene and their application in fluorescence detection of Au and Hg.

Herein, hydrothermal method was used to prepare a series of multi-color polythiophene modified carbon quantum dots. Under UV excitation, fluorescence their maximum emission wavelengths appear at 612 nm, 570 nm, and 540 nm respectively. The prepared CD-BTH and CD-BN can have specific detection of Au and Hg through fluorescence quenching effect.

Bifunctional materials based on poly(3-aminocarbazole) for efficient and highly selective detection and adsorption of Hg in water.

Herein, two poly(3-aminocarbazole) derivatives containing imidazole N-type acceptor were synthesized and reported, which are named PCPI and PCBI respectively. The fluorescence spectrum shows that PCPI (Em = 498 nm) and PCBI (Em = 398 nm) both have a strong fluorescence emission. It is worth noting that PCPI has a larger stokes shift of 153 nm, which is beneficial for improving the sensitivity of the sensor and enhancing its anti-interference ability.

2D polyaniline derivatives as turn-on fluorescent probe for efficient triethylamine detection at room temperature.

Due to the severe toxicity of triethylamine (TEA), the preparation of chemsensors with high sensitivity, low cost and visualization for TEA detection has been a research hotspot. However, based on the fluorescence turn-on detection of TEA remains rare. In this work, three two-dimensional conjugated polymers (2D CPs) were prepared by chemical oxidation polymerization.

Poly(3-amino-carbazole) derivatives containing 1,10-phenanthroline and 8-hydroxyquinoline ligands: Synthesis, properties and application as ion sensors.

As we know, excessive metal ions can even damage human health. Herein, two novel kinds of fluorescent sensing materials Poly(3-amino-carbazole) derivatives containing 1,10-phenanthroline and 8-hydroxyquinoline were synthesized and further applied to fluorescence detection for ions. The results show that Ni, Cu, and Pd have excellent quenching effects on the fluorescence of Poly[9-(1,10-phenanthroline-2-yl)-9H-carbazol-3-amine] (PPNC), the LOD for these ions reaches 5.

Rational design of fluorescent chemosensor for Pd based on the formation of cyclopalladated complex.

According to the assumption that the formation of C-Pd bond becomes a cyclopalladated complex (CPC), we designed and synthesized two C-N-N pincer ligands of BODIPY appended 2,2'-bipyridine derivatives (BP and BPB). It has been confirmed that the C-Pd bond does exist and plays a crucial role in "on-off" fluorescence behavior. Based on it, a coordination-induced fluorescence quenching sensor for Pd was constructed.

[Expression and clinical significance of P-gp in colonic gland of chronic schistosomiasis patients].

Objective: To study the expression of P-glycoprotein (P-gp) in patients with chronic schistosomiasis and its relationship with gender and age, and to explore its clinical significance.

Methods: The colonic mucosa specimens of 50 chronic schistosomiasis patients and 4 persons who had a family history of colon cancer but their physical examinations were normal (as a control group) were selected and the expressions of P-gp in the colonic gland of these samples were detected with the immunohistochemical staining method.

Results: Compared with the control group, the mean gray value of the positive particles of P-gp of colonic epithelial cells of the chronic schistosomiasis group was significantly reduced (P < 0.