Preliminary interactive investigation revealed that compound 4f could effectively intercalate into calf thymus DNA to form 4f–DNA complexes which might block DNA replication and thus exert antimicrobial activities. In addition, the binding behavior of compound 4f to DNA revealed that compound 4f could interact with DNA by hydrogen bonds and electrostaticinteractions.
通过1 H NMR,13 C NMR,IR,MS和HRMS光谱设计,合成和表征了一系列新型的咔唑氨基噻唑类新型抗菌剂。一些咔唑氨基噻唑具有良好的抗菌活性。特别地,庚基衍生的咔唑氨基噻唑4f可以有效抑制MRSA的生长,其MIC值为4μgmL -1,优于参考药物绿霉素和诺氟沙星。此外,细胞毒性研究表明,生物活性化合物4f在其MIC内对MRSA的Hep-2细胞没有细胞毒性。初步交互研究发现,化合物4f可以有效地插入小牛胸腺DNA中,形成4f –DNA复合物,这可能会阻止DNA复制,从而发挥抗菌活性。另外,化合物4f与DNA的结合行为表明化合物4f可以通过氢键和静电相互作用与DNA相互作用。
Synthesis and fluorescence study of conjugated polymers based on 2,4,6-triphenylpyridine moieties
作者:Qianping Ran、Jianfeng Ma、Tao Wang、Shimin Fan、Yong Yang、Shuai Qi、Yixiang Cheng、Fengyan Song
DOI:10.1039/c5nj03722k
日期:——
Three novel 2,4,6-triphenylpyridine-based conjugated polymers showed strong fluorescence emission with large Stokes' shifts, tunable band gaps and high quantum yields.
Novel alkyl chain-based fluorescent probes with large Stokes shifts used for imaging the cell membrane and mitochondria in different living cell lines
作者:Fangfang Meng、Yong Liu、Jie Niu、Weiying Lin
DOI:10.1039/c7ra00661f
日期:——
Fluorescent dyes with largeStokesshifts play a key role in developing multi-purpose fluorescent probes for a wide variety of targets. In this study, we developed two novel alkyl chain-based fluorescent probes (CA-C12 and CA-C2) with largeStokesshifts. The alkyl chain length of the probes affect the membrane permeability, and hence both probes can be successfully applied for sensing the cell membrane
Sequence-Defined Macrocycles for Understanding and Controlling the Build-up of Hierarchical Order in Self-Assembled 2D Arrays
作者:James R. Dobscha、Henry D. Castillo、Yan Li、Rachel E. Fadler、Rose D. Taylor、Andrew A. Brown、Colleen Q. Trainor、Steven L. Tait、Amar H. Flood
DOI:10.1021/jacs.9b06410
日期:2019.11.6
dictates structure is fundamental to understanding the activity and assembly of proteins. This idea has been applied to all manner of oligomers but not to the behavior of cyclic oligomers, aka macrocycles. We do this here by providing the first proofs that sequence controls the hierarchical assembly of non-biological macrocycles, in this case, at graphite surfaces. To design macrocycles with one (AAA)
high-fidelity tissue imaging has been achieved, and particularly, four kinds of mitochondria and their crystal-like structure in muscle tissues were visualized clearly. Finally, the dynamic process of mitochondrial fission in living cells has been shown. The strategy employing dual targeting groups should have reference value for designing fluorescentprobes with ultrahigh selectivity to various intracellular membranous