Characterisation of poly (phenylenevinylene) by infrared and optical absorption

Polymerization in a Reverse Micelle Nanoreactor: Preparation of Processable Poly(p-phenylenevinylene) with Controlled Conjugation Length

“…This is in exact correlation with the data obtained by laser light-scattering (LLS) measurements of different droplet sizes as shown in Figure . Since, in the reverse micelles the size of the aqueous droplet is directly related to the amount of elecrolyte dissolved into the polar core, the LLS data reveal that the particle size increases from 9 to 74 nm as W 0 is increased from 5 to 20. Thus the degree of unsaturation (chain length) can be controlled by varying the droplet size of the reverse micellar system.…”

Conjugated Polymers

“…v) The photoinduced IR spectrum shows a pattern of relatively strong new lines at 1470 (s),1398 (mw),1274 (ms) and 1100 cm-l (vs) [173] • ·The symmetry point group of PPV taken as fully coplanar is C 2h and 14 are the TS modes of Ag species, Raman active. If the three high frequency localized C-H stretchings are neglected we expect to find 11 modes in the frequency range 1700-100 cm-l • These modes may show frequency and intensity dispersion with Fg.…”

Estudo da estrutura e dinâmica molecular em filmes de polifluorenos e correlações com a fotoluminescência

“…Dentre os primeiros polímeros emissores de luz que apareceram, a classe de derivados do poliparafenileno de vinileno (PPV) foi a que mais se destacou, pela sua significante luminescência e um "band gap" de aproximadamente 2.2 eV -emitindo uma luz alaranjada [6,[14][15][16][17] . Dentro da classe do PPV, alguns derivados obtiveram grande [18][19][20][21][22][23][24] .…”