Complexation of polyethylene glycols

Antipina et al. (1972) also investigated the complexation of polyethylene glycols) with linear polymethacrylic and acrylic acids of molecular... 

Preparation of inclusion complex of polyethylene glycol-carboxylic acid and a-cyclodextrin... 

DNA, RNA, hemoglobin, and protein complexes of polyethylene glycol were chromatographed on a Cig column (A = 260 nm). Elution used reagent alcohol as the mobile phase. (Note Care should be taken to order the correct reagent alcohol.) Excellent resolution resulted for each class of complexes [240]. For example, three DNA/PEG peaks were resolved one for the number of base pairs <30, one for base pairs between 30 and 70, and one for base pairs between 70 and 130. In this case... 

S. S. Saltybaeva, L. A. Bimendina, and E. V. Bekturov. 1979. Properties of solutions of complexes of polyethylene glycol with statistical copolymers of meth-acrylic acid and methyl methacrylate. Izv Akad Nauk Kazakhskoi SSR Ser Khim 3 26-30. 

Partially dehydrated derivatives complexed with polyethylene glycol or propylene glycol exist. In the United of hydration has been replaced by glycine are particularly popular. Aluminum zirconium tetrachlorhydrex gly antiperspinant products. 

Multi-armed polymers with a cyclotriphosphazene core XI and XII have been synthesized from the reaction of polyethylene glycol monomethyl ethers with acid chlorides of hexakis(3,5-dicarboxyphenoxy) and hexakis(4-carboxyphe-noxy) cyclotriphosphazenes. Their complexes with LiC104 were investigated, and their maximum conductivities are reported in Table 17 [621]. 

Research Focus Method of preparing viscoelastic polymers using crosslinked polyrotaxane inclusion complexes consisting of polyethylene glycol (PEG)-carboxyhc acid and a-cyclodextrin. 

Shi, L., Tang, G.P., Gao, S.J., et al. (2003). Repeated intrathecal administration of plasmid DNA complexed with polyethylene glycol-grafted polyethylenimine led to prolonged transgene expression in the spinal cord. Gene Then, 10(14), 1179-1188. 

This ointment contains both bovine pancreatic DNase I as well as a fibrinolytic complex formulated in a mixture of polyethylene glycol and paraffin oil [85]. 

Incidentally, C. J. Pedersen s first report on crown ethers and their complexes was published in the same year as the mechanism of the biological activity of valinomycin was clarified [2], Crown ethers are cyclic derivatives of polyethylene glycol of varying ring size, an example of which is also depicted in Figure 2.2.1. The structural relationship with the ionophores is clearly visible. It is thus not surprising that crown ethers also bind metal cations by coordination with the oxygen atoms [1, 3]. 

Ordinarily anionic polymerizations must be run in the absence of oxygen, but the addition of polyethylene glycol serves to complex with the sodium ion just as 18-crown-6 does and enhances the catalytic activity of the sodium hydride. 

Better yields were often also obtained by use of the complex copper salt (17), prepared in situ from KCN and CUSO4 in the presence of NH3 (equation 20). In a thorough investigation Japanese workers recently treated a series of aromatic amines with sodium nitrite in a mixture of polyethylene glycol and CH2CI2 with HCl in a little water at 0 °C. After addition of the crystalline complex salt (17) the corresponding arenenitriles were obtained in high yield. 

Neumann, R., Sasson, Y. Increased para selectivity in the Reimer-Tiemann reaction by use of polyethylene glycol as complexing agent. Synthesis 1986, 569-570. 

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