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dc.contributor.authorWeng, J.zh_CN
dc.contributor.authorZhang, Q. Q.zh_CN
dc.contributor.author张其清zh_CN
dc.date.accessioned2013-12-12T02:51:16Z
dc.date.available2013-12-12T02:51:16Z
dc.date.issued2005-11-15zh_CN
dc.identifier.citationJournal of Polymer Science Part a-Polymer Chemistry, 2005,43(22):5414-5428zh_CN
dc.identifier.issn0887-624Xzh_CN
dc.identifier.otherISI:000232954200003zh_CN
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/71420
dc.description.abstractWe 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.zh_CN
dc.language.isoen_USzh_CN
dc.source.urihttp://dx.doi.org/10.1002/pola.20960zh_CN
dc.subjectCARBOXYL-TERMINATED DENDRIMERSzh_CN
dc.subjectPOLY(AMIDOAMINE) DENDRIMERSzh_CN
dc.subjectIRON PORPHYRINSzh_CN
dc.subjectMODEL COMPOUNDSzh_CN
dc.subjectCOREzh_CN
dc.subjectCOMPLEXzh_CN
dc.subjectBINDINGzh_CN
dc.subjectHOSTSzh_CN
dc.subjectPHzh_CN
dc.subjectNANOPARTICLESzh_CN
dc.titleSyntheses and nickel coordination properties of cyclen substituted with mixed stilbene/poly(ethylene glycol) dendritic armszh_CN
dc.typeArticlezh_CN


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