Progress in the chemistry of polyconjugated systems

Davydov, B.E.; Krentsel, B. A.

doi:10.1007/3-540-08389-8_5

Cited by 18 publications

(4 citation statements)

References 96 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The many synthetic routes to conjugated polymers may be classified into two broad categories: (i) those in which the target conjugated polymer is obtained directly from conventional polymerization processes1,2 and (ii) those involving transformation of an existing precursor nonconjugated polymer into the target conjugated polymer. 2 The latter approach is especially attractive from a technological application point of view since the precursor polymers are usually soluble or fusible whereas the conjugated derivatives are usually more intractable. Elimination of small molecules from precursor polymers is an important class of transformation processes for forming conjugated polymers.…”

Section: Alternating Aromatic and Quinonoid Sequences Via Elimination...mentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of conjugated polymers with alternating aromatic and quinonoid sequences via elimination on precursors

Jenekhe¹

1986

Macromolecules

View full text Add to dashboard Cite

Section: Alternating Aromatic and Quinonoid Sequences Via Elimination...mentioning

confidence: 99%

“…Wavelength (nm) Figure 3. Optical absorption spectra of PBTAB film at different times during in situ elimination reaction at 23 °C: (1) initial; (2) 15 min; (12) after 24 h.…”

Section: Alternating Aromatic and Quinonoid Sequences Via Elimination...mentioning

confidence: 99%

Synthesis of conjugated polymers with alternating aromatic and quinonoid sequences via elimination on precursors

Jenekhe¹

1986

Macromolecules

View full text Add to dashboard Cite

“…Irradiation of solid metal propynoates with 60 Co γ-rays produces the corresponding metal polypropynoates . The factors that influence this unusual solid-state reactivity include the relative distance between the reactive acetylenic centers (including the required presence of infinite chains of short acetylene−acetylene contacts), crystal lattice energy, and the absorption cross section of the material for γ-rays. − Salts of the heavier metals show greater sensitivity to ionizing radiation, apparently a consequence of both lattice energy and absorption effects. ,,, Irradiation of solid “all-organic” acetylenes with apparent ideal alignment of reactive groups produces no significant product. − As part of a program to discover new radiation-sensitive heavy-metal carboxylates, we prepared a rare-earth propynoate of stoichiometry [La(O 2 CC⋮CH) 3 (OH 2 ) 3 ] 2 ( 1 ) and observed that a solid-state reaction occurred when 1 was exposed to 60 Co γ-rays.…”

Section: Introductionmentioning

confidence: 99%

Preparation, Structure, and Solid-State Reactivity of Lanthanum Propynoates

Brodkin¹,

Foxman²,

Clegg³

et al. 1996

Chem. Mater.

View full text Add to dashboard Cite

A comparative study of the complexes La 2 (O 2 CCtCH) 6 (H 2 O) 4 ‚2H 2 O (1) and La 2 (O 2 CCtCH) 6 -(C 10 H 8 N 2 ) 2 (H 2 O) 2 ‚4H 2 O‚2C 10 H 8 N 2 (2) was undertaken to assess the effect of introducing bulky ligands on the solid-state reactivity of metal propynoates. A solid-state polymerization reaction occurred when 1 was exposed to 60 Co γ-rays; complex 2 was found to be stable to 60 Co γ-irradiation. Complexes 1 and 2 have closely-related molecular structures and, as expected, rather different packing arrangements. The crystal structures of 1 (with infinite chains of short acetylene-acetylene contacts) and 2 (containing only a chain of only five short acetylene-acetylene contacts) are consistent with the observed reactivity patterns. The results provide useful insight into the planning of syntheses for radiation-sensitive materials. Crystal data: 1: monoclinic, space group P2 1 /c, a ) 11.126(3), b ) 14.174(4), c) 8.851(3) Å; β ) 99.65(3)°; Z ) 2; R ) 0.027, R w ) 0.037 for 3674 data for which I > 1.96σ-(I). 2: triclinic, space group P1 h, a ) 10.393(3), b ) 13.022(4), c ) 13.413(4) Å; R ) 116.90-(1); β ) 101.03(1); γ ) 103.82(1)°; Z ) 1; R ) 0.025, R w ) 0.024 for 4921 data for which F > 4σ(F).

show abstract

“…d(Γ) = (dim C L · dim C R ) 1/2 ). Conversely, every such algebra arises from a modular invariant [5], which in fact is unique [6].…”

Section: Theoremmentioning

confidence: 99%