Using chemical, enzymatic, and NMR analyses, it was shown that the primary structure of a purified beta-glucan (designated SCG), obtained from cultured fruiting bodies of S. crispa is a 6-branched 1,3-beta-glucan, with one branch in approximately every 3 main chain units [ 7– 9].
New poly[(silylene)arylene] statistical copolymers with σ-conjugated silicon and π-conjugated carbon main-chain units are reported.
Conformationally restricted polyesters comprising alternating azobenzene and chiral binaphthylene main-chain units undergo photo-induced oscillations in optical rotatory power when stimulated with sequential intervals of ultraviolet and visible light exposure.
Most notably, the insertion of flexible oligo ethylene oxide) spacer elements between neighboring binaphthylene and azobenzene main-chain units had a pronounced damping effect on the photo-dynamic behavior exhibited by these chiral systems.
spectroscopy analysis of both the diphenyl ester precursors and polyesters identified the main-chain units, the isomeric aromatic acid residue and glycol carbons, the linking and the terminal ends of the octadecyl side chain, and finally allowed detection of phenyl ester end groups at 1 2% level.
The contour length of the cylindrical brush polymers per main chain monomer unit, lm, was determined to slightly vary with side chain molar mass Mnsc according to lm∼(Mnsc 0.059.
A series of mesogen-jacketed liquid crystalline polymers (MJLCPs) with polynorbornene as the main chain and cholesteryl mesogenic units at the ends of the side chain, PNbnChol (n = 1, 3, 5, which is the number of benzene rings in the rigid side-chain core), were prepared by ring-opening metathesis polymerization.
A series of efficient and spectrally stable blue light-emitting polyfluorene derivatives containing 3,7-dibenzothiophene-S,S-dioxide (SO) unit in main chain and oxadiazole (OXD) moiety in the side chain were synthesized via Suzuki copolymerization.
It has been shown that the naphthalene unit in the main chain of the compatibilizer interacts with MWCNTs by π π interaction and that the carboxylic acid unit in the graft chain of the compatibilizer interacts with the amide group of N66.
Two new soluble arylenevinylene-based polymers comprising of an electron-donating carbazole unit and an electron-accepting 2,1,3-benzothiadiazole (or fluorenone) unit in the main chain were synthesized by Heck polycondensation between 3,6-divinylene-9-decyl carbazole and 4,7-dibromo-2,1,3-benzothiadiazole (or 2,7-dibromofluorenone).
