Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Ananda M. Sarker"'
Publikováno v:
The Journal of Physical Chemistry A. 107:6533-6537
Model 1,4-bis(styryl)benzene derivatives 1a,b related to poly(2-bromo-5-methoxy-1,4-phenylenevinylene) were synthesized to probe the effect of bromination on excited-state behavior of conjugated phenylenevinylene analogues. They showed solution absor
Publikováno v:
Synthetic Metals. 132:227-234
Poly(para-phenylenevinylene-alt-3-tert-butyl-meta-phenylenevinylene) was synthesized by Wittig condensation with varying ratio of cis and trans olefin bonds. The luminescent properties of the unisomerized and trans-isomerized polymers (1 and 2, respe
Publikováno v:
Journal of Polymer Science Part A: Polymer Chemistry. 40:659-674
A series of viologen polymers with bromide, tosylate, and triflimide as counterions were prepared by either the Menshutkin reaction or metathesis reaction in a common organic solvent. Their polyelectrolyte behavior in methanol was determined by solut
Publikováno v:
Macromolecules. 35:223-230
The polymers discussed in this contribution consist of phenylenevinylene chromophores linked together across flexible biphenyl “hinges” to shorten the effective conjugation length and to give sufficiently twisted structures that interchain aggreg
Publikováno v:
Chemistry of Materials. 13:3949-3953
We report the synthesis of a series of new ammonium tetraorganylborates strategically designed to, upon photolysis, generate tertiary amines. Experiments in acetonitrile show amine formation in reasonably high quantum yield that depends on the photor
Publikováno v:
Macromolecules. 34:5897-5901
A series of new segmented copolymers containing m-phenylene in the chromophore unit have been synthesized by Wittig condensation. They are readily soluble in organic solvents and have high photoluminescence quantum yields in chloroform. Face-to-face
Autor:
K. B. Henbest, M. A. J. Rodgers, Bernd Strehmel, Douglas C. Neckers, J. H. Malpert, D. Y. Chen, and Ananda M. Sarker
Publikováno v:
Journal of Nanoscience and Nanotechnology. 1:107-124
The photochemical and photophysical properties of the crown ethers trans,trans-1,4-bis[2-(3',4'-benzo 15-crown 5)ethenyl]-2,3,5,6-tetrafluorobenzene (1) and trans,trans-1,4-bis[2-(3',4'-benzo 18-crown 6) ethenyl]-2,3,5,6-tetrafluorobenzene (2) were i
Publikováno v:
Macromolecules. 33:7426-7430
A series of new PPV-based alternating copolymers containing conjugated and nonconjugated blocks have been synthesized with the objective of raising the glass transition temperature (Tg) relative to...
Publikováno v:
Macromolecules. 32:8791-8799
A series of reactive (2, 4) and nonreactive (3, 5) fluorescent probes based on 4-(dimethylamino)-4‘-nitrostilbene (1) have been synthesized. Substitution of a methyl on the dimethylamino group results in blue shifts in emission and increases in Φf
Publikováno v:
Macromolecules. 32:7476-7482
The fluorescence probes trans,trans-1,4-bis[2-(2‘,5‘-dimethoxy)phenylethenyl)-2,3,5,6-tetrafluorobenzene (1) and trans,trans-1,4-bis[2-(3‘,4‘,5‘-trimethoxy)phenylethenyl)-2,3,5,6-tetrafluorobenzene (2) show solvatochromic behavior yielding