Zhaobin Chen

Name:

Organization: Changchun Institute of Applied Chemistry

Department: State Key Laboratory of Polymer Physics and Chemistry

Title:

Chemicals
References

Alkyl Substituted Hydantoin-Based N-Halamine: Preparation, Characterization, and Structure–Antibacterial Efficacy Relationship

Co-reporter:Jianguo Chang, Xiuyun Yang, Yuqin Ma, Jing Shao, Xiaoniu Yang, and Zhaobin Chen

Industrial & Engineering Chemistry Research 2016 Volume 55(Issue 35) pp:9344

Publication Date(Web):August 19, 2016

DOI:10.1021/acs.iecr.6b01306

On the basis of the reaction of 5,5-dimethylhydantoin potassium salt with dibrominated alkane, a series of hydantoin derivatives in which two hydantoin rings are bridged by an alkyl chain with different length (C2, C6, C8, and C12) were synthesized. Upon chlorination, these compounds were transformed into hydantoin-based N-halamines. The structures of these samples were fully characterized with 1H NMR, FT-IR, UV/vis, thermal analyses, and iodometric titration. The antibacterial activity of these N-halamines was assessed with 4 × 109 CFU/mL of Gram-negative Escherichia coli under different chlorine concentrations and over different periods of contact time. It was found that the antibacterial properties and the releasing characteristics of the active chlorine of the hydantoin-based N-halamines changed obviously with increased alkyl chain length, and the factors influencing the antibacterial efficacy were discussed in terms of water solubility, steric effect, electron-donating effect, and action mechanism.

Improved Thermal Stability of Polymer Solar Cells by Incorporating Porphyrins

Co-reporter:Sisi Wang;Yunpeng Qu;Sijun Li;Feng Ye;Xiaoniu Yang

Advanced Functional Materials 2015 Volume 25( Issue 5) pp:748-757

Publication Date(Web):

DOI:10.1002/adfm.201403018

Thermal stability has been the important issue in organic solar cell, especially for the large scale fabrication and application in the future. In this work, a new strategy involving the introduction of porphyrin compound (BL) is proposed to prevent the [6,6]-phenyl C61 butyric acid methyl ester (PC₆₁BM) aggregation. The supramolecular interactions between PC₆₁BM and BL are first demonstrated in PC₆₁BM:BL binary blend, and then the effect of BL on P3HT:PC₆₁BM blend is qualitatively and quantitatively studied by differential scanning calorimetry, UV–vis absorption spectroscopy, atomic force microscopy, optical microscopy, and fluorescence techniques. It is found that the BL addition not only stabilizes the morphology of P3HT:PC₆₁BM blend films, but also shows a good ability to maintain the electron mobility by depressing the PC₆₁BM crystallization. And the thermal stability of the devices based on P3HT:PC₆₁BM:BL ternary blend films is therefore greatly improved. For example, 8 wt% BL doping drops the power conversion efficiency by 10.5% relative to its peak value after 48 h of annealing at 130 °C, while 71.5% of decrease is obtained for the device without BL after only 3 h of annealing. This strategy is preliminarily proved to be universal and will show great potentials in future commercialization of polymer solar cells.