Polymere charge‐transfer‐Komplexe auf der basis von polyvinylalkoholacetalen, 3

Abstract

A new fluorene containing polymer, poly[2-(2-fluorenyl)-l,3dioxan-4,6-diylmethylene] (3 or 4), and the corresponding model compound, 2-fluorenecarbaldehydetrimethyleneacetal(6) were synthesized. The fluorescence spectroscopy of the polymer in dilute solution indicates the formation of an intramolecular excimer. Charge-transfer complex formation with tetracyanoethylene (TCNE), 2,5-cyclohexadien-1 ,ediylidenedimalonodinitnle (TCNQ), and 2,4,5,7-tetranitro-9-fluorenone (TENF) was studied by means of absorption spectroscopy.

Poly(vinyl alcohol) functionalization with aldehydes in organic solvents: Shining properties of poly(vinyl acetals)

“…A large number of applications of PVA and its derivatives can be found in several fields, in particular for the development of biomedical, cosmetic, textiles, paper, and adhesives. [46][47][48][49] Several other aldehydes have been grafted on PVA [49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65] and poly(vinyl acetals) have been utilized, among others, to obtain Langmuir-Boldgett films, 50,51 membranes for ultrafiltration, 66 fluorescent polymers for biomedical uses, 67 or anti-corrosions agents for material science. [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44] Thus, PVA acetalization with aldehydes has also been reported 45 and some of the resulting poly(vinyl acetals) are commercially available.…”

“…1 Poly(vinyl butyral) is used in particular for its coating and adhesive properties. [46][47][48][49] Several other aldehydes have been grafted on PVA [49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64][65] and poly(vinyl acetals) have been utilized, among others, to obtain Langmuir-Boldgett films, 50,51 membranes for ultrafiltration, 66 fluorescent polymers for biomedical uses, 67 or anti-corrosions agents for material science. 68 Concerning the cosmetic field, only few applications of poly(vinyl acetals) have been reported and concern the formation of cosmetic sponges 69,70 and their use in masks 71 or in nail polishing, by improving their resistance and their thermal stability.…”