Metal‐induced optical sensing and optical switching in poly(pyridyl phenylene)

Abstract

The synthesis of a conjugated polymer containing pyridyl units in the polymer backbone was successfully carried out with 2,6‐dibromopyridine and a diboronic acid derivative via the Suzuki coupling reaction. This polymer had a number‐average molecular weight of 4000 and excellent solubility in conventional organic solvents; this suggested the effect of the incorporation of dialkoxy side chains. A metallochromic phenomenon with ferric ions was clearly observed in spin‐coated films and solutions of the polymer. The response of the absorption and the fluorescence changes of the polymer films were rapid and were reproduced more than 15 times. A lightly bound intermolecular interaction between the pyridine ligand and cation was presumed to be responsible for the facile optical switching property of the polymer films. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 2444–2450, 2004

Chemical modification of the pendant structure of wholly aromatic polyamides: Toward functional high‐performance materials with tuned chromogenic and fluorogenic behavior

“…Notably, the spectra of copolyamide films show a broad emission band and a significant bathochromic emission shift compared with the solution emission spectra, highlighting the influence of the solid state in the fluorescence behavior of these materials. These redshifts were attributed to packing and orientation effects in the local geometry of the polymer chains in the dense films 40, 41…”

Fast response photochromic textiles from hybrid silica surface coating

“…This material has been in use in ophthalmic lenses and potential applications can be found in areas such as rewritable optical recording media [3][4][5][6][7], data memory [8][9][10][11][12][13][14], optical switches [11,13,[15][16][17], and sensors [18][19][20][21]. The use of photo-chromism in textiles will create new opportunities to develop smart garments capable of blocking UV radiation and/or sensing environmental changes, as well as displaying fancy colour-changing effects [22][23][24][25].…”

Photochromic fabrics with improved durability and photochromic performance

“…Photochromic materials have attracted considerable attention in both science and industry [1,2], for their practical or potential applications in protective ophthalmic lenses [3,4], rewritable recording media [5][6][7][8][9][10][11][12], data memory [13][14][15][16][17][18][19][20][21][22][23], and sensors [24][25][26][27][28]. Since the color change of most organic photochromic dyes is triggered by UV light, these dyes also have a UV protection function.…”