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LADDER SUPERSTRUCTURE-DIRECTED SYNTHESIS OF A WELL-DEFINED m-PHENELENEDIIMINO-BRIDGED LADDER POLYMETHYLSILOXANE
Lv, Yin-Sheng1; Ren, Zhong-Jie2; Wan, You-Zhi1; Xie, Ping2; Zhang, Rong-Ben2
2009-07-01
Source PublicationCHINESE JOURNAL OF POLYMER SCIENCE
ISSN0256-7679
Volume27Issue:4Pages:525-532
AbstractA well-defined m-phenylenediimino-bridged ladder polymethylsiloxane (LP) was first synthesized through a well-defined ladder superstructure (LS) acting as synthetic template, which was self-assembled by concerted interaction of hydrogen bonding and aromatic pi-pi stacking of the monomer (M), N, N'-bis(phenyldichlorosilyl)-m-phenylenediamine. Some key characterization data of LP and, in particular, the extremely vulnerable LS with very unstable Si. Cl and Si. N groups were given. The molecular weights (M(n)) of LS and LP are 5010 and 10480, corresponding to about 15 and 46 monomer units, respectively. To monitor the real in situ status of LS in solution the XRD measurements of special freeze-drying samples were performed, demonstrating two characteristic peaks of ladder structure. Most importantly, both LP and LS display exceedingly sharp resonance absorption peaks with a half peak width (Delta(1/2)) as small as <0.3 of MeSi(NH)O(2/2) moieties in (29)Si-NMR spectra. It is well-known that the higher the regularity of the ladder polysiloxane, the narrower the resonance peak of the siloxane moiety on the ladder backbone, and the smaller the half peak width Delta(1/2). Therefore, the very small values of Delta(1/2) for both LS and LP confirm that both LS and LP possess well-defined ladder structures.
KeywordLadder Superstructure Organo-bridged Ladder Polysiloxane Self-assembly
Indexed BySCI
Language英语
WOS IDWOS:000267265100010
PublisherWORLD SCIENTIFIC PUBL CO PTE LTD
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/66100
Collection中国科学院化学研究所
Corresponding AuthorWan, You-Zhi
Affiliation1.Beijing Univ Chem Technol, Dept Appl Chem, Coll Sci, Beijing 100029, Peoples R China
2.Chinese Acad Sci, State Key Lab Polymer Phys & Chem, Joint Lab Polymer Sci & Mat, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Lv, Yin-Sheng,Ren, Zhong-Jie,Wan, You-Zhi,et al. LADDER SUPERSTRUCTURE-DIRECTED SYNTHESIS OF A WELL-DEFINED m-PHENELENEDIIMINO-BRIDGED LADDER POLYMETHYLSILOXANE[J]. CHINESE JOURNAL OF POLYMER SCIENCE,2009,27(4):525-532.
APA Lv, Yin-Sheng,Ren, Zhong-Jie,Wan, You-Zhi,Xie, Ping,&Zhang, Rong-Ben.(2009).LADDER SUPERSTRUCTURE-DIRECTED SYNTHESIS OF A WELL-DEFINED m-PHENELENEDIIMINO-BRIDGED LADDER POLYMETHYLSILOXANE.CHINESE JOURNAL OF POLYMER SCIENCE,27(4),525-532.
MLA Lv, Yin-Sheng,et al."LADDER SUPERSTRUCTURE-DIRECTED SYNTHESIS OF A WELL-DEFINED m-PHENELENEDIIMINO-BRIDGED LADDER POLYMETHYLSILOXANE".CHINESE JOURNAL OF POLYMER SCIENCE 27.4(2009):525-532.
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