Synthesis of Hexastyrylbenzenes

Facile synthesis of two-photon absorbing polymers through radical copolymerization

“…Preparation of (E,E,E)-1,3,5-tristyrylbenzene (1) 1,3,5-tristyrylbenzene was prepared by Heck reaction of 1,3,5-tribromobenzene and styrene following a reported procedure [28] …”

“…Further more, with the tolerance of radical polymerization to various functionalities, various TPA polymers bearing functional groups can be synthesized and further modified for different applications. The model of branched two-photon absorbing chromophore employed in this research is (E,E,E)-1,3,5-tristyrylbenzene (1) which has previously been synthesized and was found to exhibit excellent nonlinear optical properties [26][27][28]. To covalently attach the molecular structure of 1 to polymer backbone, a synthetic strategy is developed as depicted in Figure 1.…”

Defined‐length Carbon‐rich Conjugated Oligomers

“…There are no hints of a cyclic product which would have a belt structure. Cyclooligomers consisting of 1,4-phenyleneethynylene units (n ¼ 6,7,8,9) were obtained by Oda et al from the corresponding cycloalkenes by bromination/dehydrobromination reactions [139,140].…”

“…Reports on areno-condensed annulenes 5 [5], star-shaped stilbenoid compounds 6 [6][7][8][9][10][11] and stilbenoid dendrimers 7 [12][13][14][15][16] are given elsewhere; this chapter is focused on linear systems, namely on oligo(1,4-phenylenevinylene)s 2 and oligo-(1,4-phenyleneethynylene)s 1.…”

Konjugierte Oligomere mit terminaler Donor‐Acceptor‐Substitution

“…Aus der Reihe 79 (Schema 22) mit Ferrocen als starkem Donor in der zentralen Position wurden kürzlich die beiden Anfangsglieder (n = 1, 2) untersucht; sie zeigen bathochromes Verhalten: l max (2) > l max (1). [95] Triphenylmethan-Farbstoffe aufzufassen sind. [96] Die Synthese von 80 a-d erfolgte aus den entsprechenden Carbinolbasen, deren Behandlung mit Säuren zur Eliminierung der am zentralen C-Atom gebundenen OH-Gruppe führte.…”