Making Bispirin: synthesis, structure and activity against Helicobacter pylori of bismuth(iii) acetylsalicylate
作者:Philip C. Andrews、Victoria L. Blair、Richard L. Ferrero、Peter C. Junk、Ish Kumar
DOI:10.1039/c3cc40645h
日期:——
Reaction of Bi(OtBu)3 with aspirin (acetylsalicylic acid = aspH) in dry toluene results in the bismuth(III) complex, [Bi(O2C(C6H4)OAc)3]∞ 1 (O2C(C6H4)OAc = asp), minimum inhibitory concentration (MIC) against Helicobacter pylori ≥ 6.25 μg mL−1, while the inclusion of a stoichiometric equivalent of KOtBu leads to crystals of the bismuthate salt [KBi(O2C(C6H4)OAc)4]∞ 2.
Bismuth(<scp>iii</scp>) complexes derived from α-amino acids: the impact of hydrolysis and oxido-cluster formation on their activity against Helicobacter pylori
作者:Madleen Busse、Emily Border、Peter C. Junk、Richard L. Ferrero、Philip C. Andrews
DOI:10.1039/c4dt02505a
日期:——
presence of free α-amino acid and hydrolysis of the bismuth(III) complexes to polynuclear bismuth oxido-clusters. The results of the bactericidal studies against Helicobacter pylori demonstrate that this hydrolysis process impacts significantly on the observed Minimum Inhibitory Concentration (MICs) which are increased substantially, often by many orders of magnitude, when the complexes are initially prepared
Bismuth Phosphinates in Bi‐Nanocellulose Composites and their Efficacy towards Multi‐Drug Resistant Bacteria
作者:Melissa V. Werrett、Megan E. Herdman、Rajini Brammananth、Uthpala Garusinghe、Warren Batchelor、Paul K. Crellin、Ross L. Coppel、Philip C. Andrews
DOI:10.1002/chem.201801803
日期:2018.9.3
incorporated into microfibrillated (nano‐) cellulose generating a bismuth‐cellulose composite as paper sheets. Antibacterial evaluation indicates that the Bi‐cellulose materials have analogous or greater activity against Gram positive bacteria when compared with commercial silver based additives: silver sulfadiazine loaded at 0.43 wt % into nanocellulose produces a 10 mm zone of inhibition on the surface of agar
一系列难溶的苯基双膦基铋(III)配合物[BiPh(OP(= O)R 1 R 2)2 ](R 1 = R 2 = Ph; R 1 = R 2 = p- OMePh; R 1 = R 2 = m- NO 2 Ph; R 1 = Ph,R 2 = H; R 1 = R 2 = Me)已被合成和表征,并显示出对大肠杆菌(E. coli)具有有效的抗菌活性,金黄色葡萄球菌(金黄色葡萄球菌),耐甲氧西林的金黄色葡萄球菌(MRSA)和耐万古霉素的肠球菌(VRE)。将铋络合物掺入微纤化(纳米)纤维素中,生成纸制的铋纤维素复合材料。抗菌评估表明,与市售的银基添加剂相比,双纤维素材料对革兰氏阳性细菌具有相似或更高的活性:磺胺嘧啶银以0.43 wt%的量负载到纳米纤维素中,可在含S的琼脂平板表面产生10 mm的抑制区金黄色葡萄球菌,而以0.34wt %负载的[BiPh(OP(= O)Ph 2)2 ]产生18m
Synthesis and structural characterisation of bismuth(<scp>iii</scp>) hydroxamates and their activity against Helicobacter pylori
作者:Amita Pathak、Victoria L. Blair、Richard L. Ferrero、Peter C. Junk、Richard F. Tabor、Philip C. Andrews
DOI:10.1039/c5dt02259b
日期:——
Bismuth(iii) hydroxamate complexes of varying composition all show powerful bactericidal activity towardHelicobacter pylori.
铋(III)羟肟酸盐络合物具有不同组成,均对幽门螺杆菌具有强大的杀菌活性。
Study of bismuth alkoxides as possible precursors for ALD
polymeric structures in the solid state while 3 is strictly monomeric. For compound2crystals suitable for complete structure solution could not be grown. Crystallization trials of 2 from hexane and toluene resulted in oxygen bridged tetramer [Bi2O(OCMe2iPr)4]2 (6). Compound 4 has dimericstructure and compound 5 forms loose tetramers as reported earlier. The structure of toluene solvatedcrystal [Bi(O2CtBu)3]4·2MeC6H5
在搜寻时 铋 原子层沉积(ALD)薄膜制备的前驱体3 铋醇盐Bi(O t Bu)3(1),双(OCMe 2 i Pr)3(2),双(OC i Pr 3)3(3),β-二酮酸铋, 双(三)3(4),以及羧酸铋合成并评估了Bi(O 2 C t Bu)3(5)。这些化合物的特征是中国,NMR,MS和TGA /SDTA。解决了化合物1和3的早期未知晶体结构。化合物1以固态形式形成二聚体和松散的聚合物结构,而化合物3则严格是单体。对于化合物2,适合于完整结构溶液的晶体无法生长。的结晶试验2从正己烷 和 甲苯 导致 氧 桥接的 四聚体[Bi 2 O(OCMe 2 i Pr)4 ] 2(6)。如先前所报道,化合物4具有二聚体结构,并且化合物5形成松散的四聚体。解决了甲苯溶剂化晶体[Bi(O 2 C t Bu)3 ] 4 ·2MeC 6 H 5(7)的结构。所有研究的化合物均显示出相对较好的挥发性和热稳定