描述了专门设计用于识别带有供体-受体氢键基团的中性客体的新宿主的合成。这些宿主的特征是紧密相邻的两个不同的结合区域:刚性的π-供体腔和插入到杯[4]芳烃骨架上缘的H-键供体N-亚甲基-N'-苯基脲基。 。通过1 H NMR光谱研究了这些受体对CDCl 3溶液中一系列中性双位有机分子的结合能力。所得结果表明,杯[4]芳烃非极性腔的刚度是决定效率的控制因素。实际上,与更严格的2相比,主机参照图10,通过下轮缘的OH的氢键结合来保持锥体结构的刚性,观察到效率降低了近一个数量级。主机2的两个绑定区域的协同作用已用不同类别的双位宾核实了。在识别尿素衍生物和二甲基亚砜方面实现了良好的效率。
Antimicrobial, non-hemolytic cationic polyamines were prepared by treating partially N-acylated polyethylenimines and/or partially oxidized polyethylenimines with a protic acid. The cationic polyamines can have a linear or branched polyethylenimine backbone structure. Preferably, the cationic polyamines comprise pendant urea groups, which can be introduced via a cyclic carbonate comprising a pendant urea group. The cationic polyamines can be active against a tuberculosis
mycobacterium
at low concentration. The cationic polyamines are also effective against Gram-negative
Escherichia coli
and
Pseudomonas aeruginosa
, Gram-positive
Staphylococcus aureus
, and fungus
Candida albicans
in solution and in the form of a film.
Recognition of Amides by New Rigid Calix[4]arene-Based Cavitands
作者:Arturo Arduini、Andrea Secchi、Andrea Pochini
DOI:10.1021/jo005596n
日期:2000.12.1
N-phenylureido group spaced by a methylene unit from the apolar cavity, binding constants up to 756 M(-)(1) were measured. Neither the two separate potential binding sites, nor the model host, where the calix[4]arene skeleton is flexible show detectable binding ability toward the series of guests examined. The rigidity of the calix[4]arene apolar cavity is the key control element in determining the efficiency
Preparation, reactivity and controlled release of SAMs of calix[4,6]arenes and calix[6]arene-based rotaxanes and pseudorotaxanes formed on polycrystalline Cu
作者:Alice Boccia、Valeria Lanzilotto、Valeria Di Castro、Robertino Zanoni、Luca Pescatori、Arturo Arduini、Andrea Secchi
DOI:10.1039/c0cp01921f
日期:——
demonstrated by the presence and relative quantitation of XPS signals from specific elements in the molecules. We have successfully tested the combination of different functionalities by producing a mixed film, prepared by ligand exchange of calix[4]arene with undecanethiol. The availability of the calix[4]arene cavity to reversibly host further species after anchoring on Cu has been demonstrated by a sequence
Nair, B. Raveendran; Francis, Joseph, Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 1984, vol. 23, # 2, p. 159 - 161
作者:Nair, B. Raveendran、Francis, Joseph
DOI:——
日期:——
Studien auf dem Gebiete der Harnstoff-Formaldehyd-Kondensation