Ordered Films by Alternating Polyelectrolyte Deposition of Cationic Side Chain and Anionic Main Chain Chromophoric Polymers

Abstract

Using the method of aqueous solution alternating polyelectrolyte deposition (APD), secondorder nonlinear optical (NLO) polymer films were prepared for the first time in which both polymers were NLO-active. Films were prepared by alternately coating a solid substrate with an NLO-active side chain polycation and an NLO-active main chain polyanion. This new polyanion was comprised of R-cinnamoyl chromophores in the syndioregic configuration (an "accordion" polymer). The new polycation was derived from polyepichlorohydrin that was completely substituted with new stilbazolium side chain. The films were transparent and had no texture when observed by polarized microscopy. The increase in intensity of the second harmonic (SH) signal generated in the films was quadratic with each molecular layer to 20 layers. Beyond that, the SH signal intensity saturated as more layers were added. CM980433P

Ultrathin polymer coatings by complexation of polyelectrolytes at interfaces: suitable materials, structure and properties

“…In this way, even polypropylene surfaces can be conveniently modified by ESA 54,141) . Typical examples for such polymers are shown in Fig. 14, but many highly dye-substituted polyions behave well in this respect, too 138,222,223,226) , as do many doped conductive polymers 162,191 . As in the case of Langmuir-Blodgett interlayers, adhesion to the surface due to hydrophobic interactions is not particularly strong 141,161,191,253,398,403) .…”

“…8) and comprises conducting and light-emitting polymers 89,112, , other non-conjugated redox-active polymers 49,62,131,132,[200][201][202][203][204][205][206][207] , polymeric complexes such as the Cu 2+ complex of poly(ethyleneimine) 80) , Ru 2+ complex of 2,29-bipyridyl containing polymers 170-172, 200, 208) , or an Os 2+ complex of poly(vinylpyridine) 196,[209][210][211] , reactive polymers 35,87,148,[212][213][214][215][216] , polymers bearing non-linear optically active dyes 35,138,148,214,[217][218][219][220][221][222][223][224][225][226] , liquid crystalline polyelectrolytes 105,[135][136][137] , and dendrimers [227]…”

Ultrathin, Layered Polyamide and Polyimide Coatings on Aluminum

“…6,7,[9][10][11] As long as constituent polyelectrolytes contain sufficiently high charge density, they will likely form layered films. 7,9,[12][13][14][15] Recent materials used to construct layered polyelectrolytes films include conduct-ing polymers, 16 inorganic sheets, 12,[17][18][19] light-emitting polymers, 20,21 dyes, 22 and biomolecules. 11,15,23,24 Unfortunately, layered polyelectrolyte films are relatively permeable because their ionic composition allows them to absorb water.…”

Conjugated Carbazole‐Based Schiff Bases as Photoinitiators: From Facile Synthesis to Efficient Two‐Photon Polymerization

“…The benzaldehyde precursors were commercially available except the ones for A3‐1, which were synthesized according to the literature . The detailed process and proton nuclear magnetic resonance ( 1 H NMR) spectra of the 2PIs can be found in Supporting Information.…”