Syntheses and nickel coordination properties of cyclen substituted with mixed stilbene/poly(ethylene glycol) dendritic arms

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	Syntheses and nickel coordination properties of cyclen substituted with mixed stilbene/poly(ethylene glycol) dendritic arms
	Weng, J. ; Zhang, Q. Q. ; Zhang QQ(张其清)
刊名	http://dx.doi.org/10.1002/pola.20960
	2005-11-15
关键词	CARBOXYL-TERMINATED DENDRIMERS POLY(AMIDOAMINE) DENDRIMERS IRON PORPHYRINS MODEL COMPOUNDS CORE COMPLEX BINDING HOSTS PH NANOPARTICLES
英文摘要	We synthesized a series of cyclens substituted with mixed stilbene and poly(ethylene glycol) dendritic arms. All dendrimers terminated with different peripheral groups had good solubility in common organic solvents, and dendrimers terminated with -CO2H groups (CO2H-dendrimers) were also soluble in alkaline solutions. The nickel coordination properties of these dendrimers were investigated in organic solvents. Dendrimers terminated with -CN groups (CN-dendrimers) and the second-generation CO2H-dendrimer [(CO2H)(8)L2] could produce pentacoordinated nickel complexes; the third-generation CO2H-dendrimer [(CO2H)(16)L3] could form tetra- and pentacoordinated nickel complexes, and the nickel complex of the fourth-generation CO2H-dendrimer [(CO2H)(32)L4] could not be obtained. This result was due to the fact that the globular surface Of (CO2H)(16)L3 formed a hydrogen-bond network that selectively penetrated cations and inhibited the access of anions to the core. The formation of the hydrogen-bond network was confirmed by Fourier transform infrared, H-1 NMR, and fluorescence data. The CN-dendrimers could not form hydrogen bonds on the surface, and the first- and second-generation CO2H-dendrimers could not form intramolecular hydrogen-bond networks. Therefore, they had no selectivity for positive nickel ions and negative chloride ions. (CO2H)(32)L4 could not produce a nickel complex because it had a crammed backbone structure that could not penetrate nickel and chloride ions. Therefore, it was possible to control the ion access of cations and anions with the hydrogen-bond network of (CO2H)(16)L3. (c) 2005 Wiley Periodicals, Inc.
语种	英语
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/71420]
专题	医学院－已发表论文
推荐引用方式 GB/T 7714	Weng, J.,Zhang, Q. Q.,Zhang QQ. Syntheses and nickel coordination properties of cyclen substituted with mixed stilbene/poly(ethylene glycol) dendritic arms[J]. http://dx.doi.org/10.1002/pola.20960,2005.
APA	Weng, J.,Zhang, Q. Q.,&张其清.(2005).Syntheses and nickel coordination properties of cyclen substituted with mixed stilbene/poly(ethylene glycol) dendritic arms.http://dx.doi.org/10.1002/pola.20960.
MLA	Weng, J.,et al."Syntheses and nickel coordination properties of cyclen substituted with mixed stilbene/poly(ethylene glycol) dendritic arms".http://dx.doi.org/10.1002/pola.20960 (2005).