메뉴 건너뛰기




Volumn 42, Issue 21, 2009, Pages 8181-8186

Selective synthesis of poly(m-phenylene oxides) over oxacalixarenes

Author keywords

[No Author keywords available]

Indexed keywords

APROTIC MEDIA; AQUEOUS STABILITY; HIGH THERMAL; NUCLEOPHILIC AROMATIC SUBSTITUTION; POLYCONDENSATION REACTIONS; PRODUCT DISTRIBUTIONS; REACTIVE MONOMERS; SELECTIVE SYNTHESIS; SUBSTITUTION PATTERNS;

EID: 70449449857     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma901518w     Document Type: Article
Times cited : (20)

References (55)
  • 1
  • 9
    • 0038746587 scopus 로고    scopus 로고
    • AA-BB type polymerization: (a) AB-type polymerization
    • AA-BB type polymerization: (a) Kim, Y. J.; Chung, I. S.; Kim, S. Y. Macromolecules 2003, 36, 3809-3811. AB-type polymerization:
    • (2003) Macromolecules , vol.36 , pp. 3809-3811
    • Kim, Y.J.1    Chung, I.S.2    Kim, S.Y.3
  • 16
    • 70449431527 scopus 로고
    • European Patent 192,177, U.S. Patent 4, 703, 104
    • (a) Matsuo, S.; Murakami, T. European Patent 192,177, U.S. Patent 4, 703, 104, 1986.
    • (1986)
    • Matsuo, S.1    Murakami, T.2
  • 38
    • 70449431526 scopus 로고    scopus 로고
    • The only notable exception being poly(arylene ether nitrile), refs 7 and 8.
    • The only notable exception being poly(arylene ether nitrile), refs 7 and 8.
  • 39
    • 70449416258 scopus 로고    scopus 로고
    • We include 6-membered heteroaromatic rings in our definition of mPO.
    • We include 6-membered heteroaromatic rings in our definition of mPO.
  • 40
    • 70449436570 scopus 로고    scopus 로고
    • note
    • Molecular weights for the polymers in this paper are reported in the experimental section of the Supporting Information but are not otherwise discussed because our synthetic optimization focused on yield and not molecular weight. Additionally, the monomers were used as received in varying degrees of purity. See Supporting Information for reported purities.
  • 41
    • 70449421643 scopus 로고    scopus 로고
    • Poly(mPO) 8 precipitates out of solution during the polymerization, and purified 8 is only slightly soluble in DMSO.
    • Poly(mPO) 8 precipitates out of solution during the polymerization, and purified 8 is only slightly soluble in DMSO.
  • 42
    • 70449416259 scopus 로고    scopus 로고
    • note
    • 1H NMR.
  • 43
    • 70449409389 scopus 로고    scopus 로고
    • See the Supporting Information for full details
    • See the Supporting Information for full details
  • 44
    • 70449390027 scopus 로고    scopus 로고
    • note
    • 1H NMRs and indicate the peak to which each spectrum is referenced. This is necessary because, as shown in Figure S2, significant peak shifting is observed depending on the environment of the polymer.
  • 45
    • 70449416257 scopus 로고    scopus 로고
    • note
    • The Mesopore (Varian, Inc.) columns used for Figure 2 and in the Supporting Information have a molecular weight cutoff of 25 kDa. Poly(mPO) 8 is partially above this molecular weight range, and the GPC chromatogram shown in Figure 2 should only be used as a qualitative comparison of the formed oligomers. Analytical GPC was performed to determine the molecular weights of the poly(mPOs) using Vistotek Viscogel columns with a higher molecular weight range (see the Supporting Information for more details). AU analytical GPC traces of poly(mPOs) are monomodal (i.e., the bimodal appearance of some high molecular weight peaks from the Mesopore GPC arises from the molecular weight cutoff of the column).
  • 46
    • 70449384626 scopus 로고    scopus 로고
    • note
    • 1H NMR and GPC are otherwise very similar.
  • 51
    • 70449390026 scopus 로고    scopus 로고
    • note
    • f values for the syn- vs anti-conformations of 20 and 21 when energy minimized at the MMFF94x level (see the computation data tables for dimers 20 and 21 in the Supporting Information).
  • 52
    • 70449390025 scopus 로고    scopus 로고
    • note
    • To simplify the comparison, positional numbering in this section assumes that the carbon atoms bearing halogen atoms in all electrophiles will be numbered positions 1 and 3. Thus, substitution at the 2-position refers to the position between the reactive halogens on the electrophile monomers, irrespective of IUPAC priority weighting.
  • 53
    • 70449436569 scopus 로고    scopus 로고
    • note
    • Molecular weights for all polymers are reported in the Supporting Information except poly(mPO) 28, which was not soluble in THF. Previously reported polymers 22 and 23 do not have reported molecular weights.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.